Hypertension As Cause Of Stroke Health And Social Care Essay

High blood pressure is a common and major cause of shot and other cardiovascular disease. There are many causes of high blood pressure, including defined hormonal and familial syndromes, nephritic disease and multifactorial racial and familial factors. It is one of the prima causes of morbidity and mortality in the universe and will increase in world-wide importance as a public wellness job by 2020 ( Murray and Lopez 1997 ) . Blood force per unit area ( BP ) is defined as the sum of force per unit area exerted, when bosom contract against the opposition on the arterial walls of the blood vass. In a clinical term high BP is known as high blood pressure. Hypertension is defined as sustained diastolic BP greater than 90 mmHg or sustained systolic BP greater than 140 mmHg. The maximal arterial force per unit area during contraction of the left ventricle of the bosom is called systolic BP and minimal arterial force per unit area during relaxation and dilation of the ventricle of the bosom when the ventricles fill with blood is known as diastolic BP ( Guyton and Hall 2006 ) . Table 1: Definitions and categorization of blood force per unit area degrees ( adapted from JNC-VII ) High blood pressure is normally divided into two classs of primary and secondary high blood pressure. In primary high blood pressure, frequently called indispensable high blood pressure is characterised by chronic lift in blood force per unit area that occurs without the lift of BP force per unit area consequences from some other upset, such as kidney disease. Essential high blood pressure is a heterogenous upset, with different patients holding different causal factors that lead to high BP. Essential high blood pressure demands to be separated into assorted syndromes because the causes of high BP in most patients soon classified as holding indispensable high blood pressure can be recognized ( Carretero and Oparil 2000 ) . Approximately 95 % of the hypertensive patients have indispensable high blood pressure. Although merely approximately 5 to 10 % of high blood pressure instances are thought to ensue from secondary causes, high blood pressure is so common that secondary high blood p ressure likely will be encountered often by the primary attention practician ( Beevers and MacGregor 1995 ) . In normal mechanism when the arterial BP raises it stretches baroceptors, ( that are located in the carotid sinuses, aortal arch and big arteria of cervix and thorax ) which send a rapid urge to the vasomotor Centre that ensuing vasodilatation of arteriolas and venas which contribute in cut downing BP ( Guyton and Hall 2006 ) . Most of the book suggested that there is a argument sing the pathophysiology of high blood pressure. A figure of predisposing factors which contributes to increase the BP are fleshiness, insulin opposition, high intoxicant consumption, high salt consumption, aging and possibly sedentary life style, emphasis, low K consumption and low Ca consumption. Furthermore, many of these factors are linear, such as fleshiness and intoxicant consumption ( Sever and Poulter 1989 ) . The pathophysiology of high blood pressure is categorised chiefly into cardiac end product and peripheral vascular resistant, renin- angiotonin system, autonomic nervous system and others factors. Normal BP is determined and maintained the balance between cardiac end product and peripheral resistant. Sing the indispensable high blood pressure, peripheral resistant will lift in normal cardiac end product because the peripheral resistant is depend upon the thickness of wall of the arteria and capillaries and contraction of smooth musculuss cells which is responsible for increasing intracellular Ca concentration ( Kaplan 1998 ) . In renin-angiotensin mechanism hormone system plays of import function in maintain blood force per unit area ; particularly the juxtaglomerular cells of the kidney secrete renin in order to response glomerular hypo-perfusion. And besides renin is released by the stimulation of the sympathetic nervous system which is subsequently convert to angiotensin I so once more it converts to angiotensin II in the lungs by the consequence of angiotensin- change overing enzyme ( ACE ) . Angiotensin II is a powerful vasoconstrictive and besides it released aldosterone from the zona glomerulosa of the adrenal secretory organ which is responsible for Na and H2O keeping. In this manner, renin-angiotensin system increases the BP ( Beevers et al 2001 ) . Similarly, in autonomic nervous system sympathetic nervous system play a function in pathophysiology of high blood pressure and cardinal to keeping the normal BP as it constricts and dilates arteriolar. Autonomic nervous system considers as an of import in short term alterations in BP in response to emphasis and physical exercising. This system works together with renin-angiotensin system including go arounding Na volume. Although adrenaline and nor-adrenaline does n't play an of import function in causes of high blood pressure, the drugs used for the intervention of high blood pressure block the sympatheti c nervous system which had played proper curative function ( Beevers et al 2001 ) . Others pathophysiology includes many vasoactive substance which are responsible for keeping normal BP. They are enothelin bradikinin, endothelial derived relaxant factor ; atrial natriuretic peptide and hypercoagulability of blood are all responsible in some manner to keep the BP ( Lip G YH 2003 ) . The 7th study of the Joint National Committee ( JNC-VII ) on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure defines some of import ends for the rating of the patient with elevated BP which are sensing and verification of high blood pressure ; sensing of mark organ disease ( e.g. nephritic harm, congestive bosom failure ) ; designation of other hazard factors for cardiovascular upsets ( e.g. diabetes mellitus, lipemia ) and sensing of secondary causes of high blood pressure ( Chobanian et al 2003 ) . Most hypertensive patients remain symptomless until complications arise. Potential complications include shot, myocardial infarction, bosom failure, aortal aneurism and dissection, nephritic harm and retinopathy ( Zamani et al 2007 ) .The drug choice for the pharmacologic intervention of high blood pressure would depend on the single grade of lift of BP and contradictions. Treatment of non-pharmacologic high blood pressure includes life-style, weight decrease, exercising, Na, K, halt smoke and intoxicant, relaxation therapy and dietetic betterments, followed by pharmacological medicine therapy. Fig1. Algorithm for the pharmacologic intervention of high blood pressure ( adapted from Chobanian et al 2003 ) Normally used antihypertensive drugs include thiazide water pills, ?-blockers, ACE inhibitors, angiotonin receptor blockers, Ca channel blockers, direct vasodilatives and ?-receptor adversaries which are shown in the undermentioned tabular array. Table 2: Types of drugs used in the intervention of high blood pressure ( adapted from Waller et al 2005 ) Diuretic drugs have been used for decennaries to handle high blood pressure and recommended as first-line therapy by JNC-VII guidelines after antihypertensive and lipid-lowering intervention to forestall bosom onslaught trail ( ALLHAT ) success. They cut down circulatory volume, cardiac end product and average arterial force per unit area and are most effectual in patients with mild-to- moderate high blood pressure who have normal nephritic map. Thiazide water pills ( e.g. Microzide ) and K sparing water pills ( e.g. Aldactone ) promote Na+ and Cl- elimination in the nephrone. Loop water pills ( e.g. Lasix ) are by and large excessively powerful and their actions excessively ephemeral, nevertheless, they are utile in take downing blood force per unit area in patients with nephritic inadequacy, who frequently does non react to other water pills. Diuretic drugs may ensue in inauspicious metabolic side effects, including lift of creatinine ; glucose, cholesterin, triglyceride degrees, h ypokalemia, hyperuricemia and decreased sexual map are possible side effects. The best BP take downing response is seen from low doses of Thiazide water pills ( Kaplan 1998 ) . -blocker such as propranolol are believed to lower BP through several mechanisms, including cut downing cardiac end product through a decrease bosom rate and a mild lessening in contractility and diminishing the secernment of renin, which lead to a lessening in entire peripheral resistant. Adverse effects of b-blockers include bronchospam, weariness, powerlessness, and hyperglycaemia and alter lipid metamorphosis ( Zamani et al 2007 ) . Centrally moving ?2-adrenergic agonists such as alpha methyl dopa and Catapres cut down sympathetic escape to the bosom, blood vass and kidneys. Methyldopa is safe to utilize during gestation. Side consequence includes dry oral cavity, sedation, sleepiness is common ; and in 20 % of patients methyldopa causes a positive antiglobulin trial, seldom hemolytic anemia and Catapres causes bounce high blood pressure if the drug is all of a sudden withdrawn ( Neal M J 2009 ) . Systemic a1-antagonists such as Minipress, Hytrin and Cardura cause a lessening in entire peripheral opposition through relaxation of vascular smooth musculus. Calcium channel blockers ( CCB ) cut down the inflow of Ca++ responsible for cardiac and smooth musculus contraction, therefore cut downing cardiac contractility and entire peripheral resistant. Therefore long-acting members of this group are often used to handle high blood pressure. There are two categories of CCB dihyropyridines and non- dihyropyridines. The chief side consequence of CCB is ankle hydrops, but this can sometimes be offset by uniting with ?-blockers ( Lip G YH 2003 ) . Direct vasodilatives such as Hydralazine and minoxidil lower BP by straight loosen uping vascular smooth musculus of precapillary opposition vass. However, this action can ensue in a automatic addition bosom rate, so that combined ?-blocker therapy is often necessary ( Neal M J 2009 ) . ACE inhibitors plants by barricading the renin-angiotensin system thereby suppressing the transition of angiotonin I to angiotensin II. ACE inhibitors may be most utile for handling patients with bosom failure, every bit good as hypertensive patients who have diabetes. Using Ace inhibitors can take to increased degrees of bradikinin, which has the side consequence of cough and the rare, but severe, complication of atrophedema. Recent survey demonstrated that Capoten was every bit effectual as traditional thaizides and ?-blockers in forestalling inauspicious results in high blood pressure ( Lip G YH 2003 ) . Angiotensin II antagonists act on the renin-angiotensin system and they block the action of angiotonin II at its peripheral receptors. They are good tolerated and really seldom do any important side-effects ( Zamani et al 2007 ) . Another helpful rule of antihypertensive drug therapy concerns the usage of multiple drugs. The effects of one drug, moving at one physiologic control point, can be defeated by natural compensatory mechanism ( e.g. diuretic lessening hydrops happening secondary to intervention with a CCB ) . By utilizing two drugs with different mechanisms of action, it is more likely that BP and its complication are controlled and with the low dose scope of combined drugs besides help to cut down the side-effects as good ( Frank 2008 ) . The undermentioned two-drug combinations have been found to be effectual and good tolerated which are diuretic and ?-blocker ; diuretic and ACE inhibitor or angiotonin receptor adversary ; CCB ( dihydropyridine ) and ?-blocker ; CCB and ACE inhibitor or angiotonin receptor adversary ; CCB and b-diuretic ; ?-blocker and ?-blocker and other combinations ( e.g. with cardinal agents, including ?2-adrenoreceptor agonists and imidazoline- I2 receptor modulators, or betwee n ACE inhibitors and angiotonin receptor adversaries ) can be used ( ESH and ESC 2003 ) . If necessary, three or four drugs may be required in many instances for the intervention. The usage of a individual drug will take down the BP satisfactorily in up to 80 % of patients with high blood pressure but uniting two types of drugs will take down BP about 90 % . If the diastolic force per unit area is above 130 mmHg so the hypertensive exigency is occurred. Although it is desirable to cut down the diastolic force per unit area below 120 mmHg within 24 hours in accelerated high blood pressure, it is normally unneeded to cut down it more quickly and so it may be unsafe to make so. This is because the mechanisms that maintain intellectual blood flow at a changeless degree independent of peripheral BP are impaired in high blood pressure. However, it is of import to cut down the BP rapidly by giving the endovenous drugs but cautiousness should be taken to avoid cerebrovascular force per unit area bring oning intellectual ischaemia ( Grahame-Smith and Aronson 2002 ) . In decision, high blood pressure emerges as an highly of import clinical job because of its prevalence and potentially annihilating effects. The major categories of antihypertensive drugs: water pills, ?-blockers, CCB, ACE inhibitors and angiotonin receptor adversaries, are suited for the induction and care of antihypertensive therapy which helps in decrease of cardiovascular morbidity and mortality.

Who Am I

Australia, whose name is Bianca. I am currently 1 6 years of age. I have very strong opinions on many things and I like to debate people on what I believe is right. Sometimes that gets me into a lot of trouble but I stick to what I believe in the end. What defines me is my sense of knowing do belong. I am who I am, I am unique and different and I now that, that is okay, because everyone is unique and different too.I see myself as a bubbly person, who tends to keep her deeper thought and feelings to herself. Sometimes I'm insecure, sometimes I let little things hurt me, sometimes worry about petty little issues that won't matter in the next 10 years but that is just who I am now. Many life experiences have defined the person who I am today, and for that I am grateful.Although not all of hose experiences have been good, they have all been a learning experience for me and have helped shape the person I have become today. I wouldn't change anything I have experienced because I would be a different person. I wouldn't be as strong, as open to new things, wouldn't be as spontaneous, and I just wouldn't be me. Everything little thing every little stepping stone, every little bump has made me the person I am today and I am so proud of that. Who Am I Elegy/Repetition Who Am I Jennifer Leaf Who am I Don't know what to think Living every day Like It's the first 5 How could it get any worse About life They told me to Just Hold on tight 10 Lost and out of control Don't know who or where to turn Will they Just watch me burn 15 to afraid to fall Or am I afraid to loose it all Deniable, completely insane Will I ever find my way Will ever be the same Falling Down the drain Will I ever be someone 26 Or will I Just go out and run Day in And day out Don't know where to go 30 Every day Every night Trying to see the light All I know isWho I could be 35 It's all like a dream to 20 I want to scream and shout Don't know why I'm yelling out Who am 1 40 And I want to scream and shout There is no doubt about it Because I don't Know anymore 45 Too afraid to find life Through the darkness That I fight 50 Will I ever see the light Don't know where to turn to Don't know where to go I did, but now 55 I Just don't know to afraid to back down Vive been fi ghting all my life But now it's time to say goodbye but I will try to find my own light I will try to shine 60 â€Å"Who Am l† is an intensified poem about the question we all ask ourselves everyday our whole lives.Everyone does one of two things, accept the fact that they simply do not know or, pretend that they do. Life is full of questions that we cannot completely answer, Just ponder our entire lives. Within this poem, the phrase, who am l, is constantly repeated. This poem is an elegy, mourning the lost life and the answer to the question asked throughout the poem. The phrase reoccurring in the poem emphasizes the question everyone asks themselves and the question most think they know the answer to. No one can entirely know who they are and what the future might bring.As a result of really not knowing, they pretend they do. â€Å"Don't know who I am/ I did, but now/ I Just don't know (49-51). Or, if they do not pretend they know who they are, they try to be someone else because there life is not written in stone. For some, they might go absolutely insane trying to find the truth behind the unanswerable question. Who am I There is no doubt about it (35-38). The repetition gives the poem an intense look on life and shows signs of confusion, frustration, and anger. The passion in increased in every stanza due to the fact that he speaker keeps on repeating those three words.This allows the reader to imagine that the person in trapped in her own mind, that is about to explode, with no way out. With this repetition, the reader can see the pain in the speaker's words and how made her give up on everything else and is slowly eating her inside and killing her. She has one last attempt at trying to save herself by saying she can shine no matter what, but those three words enforce a tragic ending to her dark story. The elegy aspect of this poem is the loss of herself. The speaker Just gave up on life ND on herself and pities herself because she does not know who she is.The speaker does not realize that no one does and she will never know. Who am I Vive been fighting all my life But now it's time to say goodbye (57-60). The speaker has given up on life because she cannot face the world as an outcast anymore. She need something to be proud of, something to believe in, something to fight for. She does not have the will to keep going like a shadow lurking through the night. Due to the fact that the three words, who am I is slowly annihilating her, the elegy is mainly found in the repetition.She cannot escape from this tragic death and by the last two lines, you know she can no longer fight it and her death is mourned. Her pride and dignity are lost every time those three words are said and that is additionally mourned. Here lies the pride, dignity, and life of the speaker of the poem, she will be missed. I wrote this poem because self-influence and the influence of others is one of the most powerful things. The words in the poem show how b y wasting your life trying to answer and unanswerable question, you are leading ourselves into a trap that you cannot escape.These words can consume anyone and you can lead yourself to your own fatal end. By convincing yourself you have nothing to live for, you are blinding yourself from the truth behind the ever-so convincing lie. This poem is meant to have people believe in themselves and their capabilities and instead of trying to answer who you are as a person, embrace the mystery and be the best person you can be. â€Å"Who Am l† tells the world to fight for what you believe in, because there is always something to believe in. Who Am I â€Å"Who Am I† My name is and I will be telling you a little bit about my Background, interests, goals, and achievements. I am currently a junior at with my family of six which consists of my dad, mom, two younger brothers, and dog. I was born in a little town called Brownwood, Texas and moved to Illinois when I was 6 years old. Some of my interest vary for example I am an avid watcher of old television shows such as the Walton’s and threes company.Another one of my interests is listening to music my favorite type of genre of music is country and rock some of my favorite artist include Jason Aldean, Blake Shelton, The Eagles, Led Zeppelin, and Lynyrd Skynyrd. Some of my goals that I hope to accomplish in the near future are attending the college of my choice, becoming a successful person in life and becoming a lawyer. Growing up as a child and until now, (My young adulthood) it has been mine and my parents dream for me to become a lawyer.I have decided to become a lawy er because I have always been fascinated with law, helping others with their problems, and the justice system. I have achieved many goals in my life my top achievements are graduating middle school, getting my driver’s license, and doing better in school. But I feel that getting my driver’s license is my greatest accomplishment of all because after getting my driver’s license I felt that I was in the stage of growing up and entering adulthood. I feel that my Background, goals, achievements, and interests all represent who I am and what I stand for. Who Am I â€Å"Who Am I† My name is and I will be telling you a little bit about my Background, interests, goals, and achievements. I am currently a junior at with my family of six which consists of my dad, mom, two younger brothers, and dog. I was born in a little town called Brownwood, Texas and moved to Illinois when I was 6 years old. Some of my interest vary for example I am an avid watcher of old television shows such as the Walton’s and threes company.Another one of my interests is listening to music my favorite type of genre of music is country and rock some of my favorite artist include Jason Aldean, Blake Shelton, The Eagles, Led Zeppelin, and Lynyrd Skynyrd. Some of my goals that I hope to accomplish in the near future are attending the college of my choice, becoming a successful person in life and becoming a lawyer. Growing up as a child and until now, (My young adulthood) it has been mine and my parents dream for me to become a lawyer.I have decided to become a lawy er because I have always been fascinated with law, helping others with their problems, and the justice system. I have achieved many goals in my life my top achievements are graduating middle school, getting my driver’s license, and doing better in school. But I feel that getting my driver’s license is my greatest accomplishment of all because after getting my driver’s license I felt that I was in the stage of growing up and entering adulthood. I feel that my Background, goals, achievements, and interests all represent who I am and what I stand for.

Approaches to Branding Essay

It is essential for a business to build strong relationship with its customers to be able to stay above all competitors. One tool that a company has is a strong brand. The following are the most common ways of how companies use branding in marketing their products or services. Corporate Branding. This type has been around ever since competition among business started. In corporate branding a company uses its own name as the brand for the company. The company usually promotes its products under that brand name (Crystal 2003). An example of which is Disney, where all products of the company included the name â€Å"Disney†. In this approach the corporation or company is the main selling point (Csaba, Schultz & Yun 2005). If successfully used the company can create brand loyalty where customers look for products under that company or under the brand name. The downside of this approach is that the company will have a tendency to be identified with a single product category (Crystal 2003). Employer Branding. With the rise of newer resources like technology, the fact remains that personnel are still the most important resource of any company. As the competition for first-rate employees becomes tight, companies attract them through Human Resources Marketing or through employer branding (VersantWorks 2008). Employer branding is the impression of the stakeholders – current employees, potential hires, and previous staff – about the company as place of work (Harris 2002). The idea is to instill in the stakeholders mind that the company is â€Å"great place to work†. It immerses the employee into the company, gives the employees a sense of pride and belongingness and most important of all job fulfillment (VersantWorks 2008). A company with a good employer branding is L’Oreal. Voted as one of the Fast Moving Consumer Goods – FMCG – Employer of Choice (Employer Profile 2008). L’Oreal’s career website declares it in black and white. The company’s objective is to provide a sound working environment for its employees. Working for L’Oreal would entail a secure workplace, performance is given credit, a diverse culture, and where privacy and private life are valued (As An Employer 2008). What makes this strategy work for the company is because L’Oreal knows who it wanted to hire and focus the HR endeavor to accomplish the task (Klein 2008). Cause Branding. This is an approach in branding where a company supports a cause to be able to increase profits or to set it apart from competitors (Ivy Cohen Corporate Communications 2007). As examples will be Avon Breast Cancer Crusade, ConAgra Foods’ Feeding Children Better Program, Reebok’s Human Rights Awards and Rockport’s Fitness Walking Program. This initiative is usually interchanged with cause marketing and corporate social responsibility. Cause marketing just like cause branding seems to have the same objective but the difference lies in the duration. Short-lived cause marketing initiatives are usually one-time deals like food drives, collection bins, and auctions for charity. While cause branding is a year-long continuous endeavor. Where the company tries to associate a cause to the brand in the customers’ mentality (Evergreen & Partners 2005). On the other hand CSR or Corporate Social Responsibility is the broader initiative that consumers expect from a company. CSR involves labor practices of the company, community activities and environmental programs. It comprises various causes while cause branding focus only on one cause (Evergreen & Partners 2005).

Conflict Identification and Resolution Essay Example | Topics and Well Written Essays - 1000 words

Conflict Identification and Resolution - Essay Example The clinic has been sold to a new owner who decided to improve business efficiency and to increase sales. The newly appointed CEO has set the sales targets for the company and informed about these targets two categories of employees: sales and marketing department and doctors. Both sales department and doctors were expected to achieve the new sales targets, while doctors had to sell themselves, and marketers had to sell the clinic’s products and visits to doctors. The crux of the conflict was in an increasing confrontation between the sales department and doctors. On the one hand, doctors were blaming sales and marketing (S&M) department that they do not cope with their work as their work is to sell. On the other hand, marketing and sales department believed that doctors should be actively involved in sales process, as they were people who had direct access to the patients and the power of word of mouth was a good practice in healthcare sector. On the weekly meetings held by t he CEO and devoted to discussions and analysis of the sales progress the conflict between two parties (doctors and S&M) has been growing in result of mutual accusations and insults. It is also important to take into consideration the specific tough character of majority of doctors who often are tough people in result of the nature of their work. Doctors are special category of employees as they are used to make serious decisions quickly in order to save human live. Therefore, they don’t like when management or other employees do not make efficient decisions. The conflict described above is the intergroup conflict between S&M department and clinical department (doctors) (Deutsch & Coleman 2000). The major source of the conflict is obvious – lack of proper communication between different departments. Effective communication is especially critical during quite a challenging time of changes (new owner and newly appointed CEO) in

Advanced Database Essay Example | Topics and Well Written Essays - 1250 words - 1

Advanced Database - Essay Example This called for interventions such as the MapReduce meant to support distributed computing that involves the use of large amounts of data. Most of the activities that involve the use of big data are either for analytical or transactional applications. Data warehousing was the conventional method of helping manage data and provide information that helped in decision-making. Warehousing of big data has been questioned and it seems to be on the brink of inviting another data processing strategy. It is the wish of every organization to store up data and use the same data in decision making of the organization. Data mining entails the process of data retrieval and analysis in order for it to make sense for use in organizational decision-making. Data mining software have been developed to facilitate the analysis of data from a number of perspectives based on the needs of the users. In addition, they are able to categorize the data and develop summaries that will predict relationships. Data mining is a very important process since it helps in segregation of data so that an organization is able to keep a keen eye on the most important information. The essence of having the data mining software developed is based on the size of data that organizations struggle with; mainly in gigabytes and terabytes. Raw data is deficient and cannot be relied upon by business owners and the managements in their decision-making (Brown & Kros, 2003). This is because it has a lot of junk information that may not be necessarily necessary. Data mining has constantly evolved with time. its main essence over the years has been to obtain information from databases in order to facilitate the analysis of business progress. In the 1960s, the main concern by many business owners pertained issues to do with revenue. Data mining entailed mainly data collection where the technology under application was mainly the use of discs, computers, and tapes. With advancements in

Quickly work Essay Example | Topics and Well Written Essays - 1500 words

Quickly work - Essay Example Consumers tend to believe that goods and services with well known brand names are much better than the products whose names or brands are not well known. The process of evaluating or establishing if a given company’s brand name is well known by customers is known as Brand Equity (Aaker, 2009). If one examines the car industry, some brands have been in the market since the invention of automobiles. A good example of such a company is the Ford motor company which despite emergence of many companies, Ford has continued to experience success especially in the American market just as a result of its brand name. Other companies such as Toyota have been producing cheaper and better cars, but despite this, Ford is among the favorite car brands in the United State of America. There are various approaches to ensure brand equity in a company. One of the approaches is known as customer based equity brand approach. This approach was developed by Kevin Keller hence it is referred to as Kell er’s Brand Equity Model. The approach is best understood by using the diagram below; The above diagram simplifies the application of the customer based brand equity. In the first step, the goal of the company should be to create customer awareness or salience. This means the business establishment should ensure that its brand stands out, and it can be easily recognized by its customers. The second step involves identifying and communicating what the company’s brand means. This step is further subdivided into two, which are performance and imagery. Performance entails defining how well the company’s brand will fulfill consumer needs. Imagery involves showing how the business establishment’s products meet the needs of the consumer on a psychological and social level. The third step involves consumers responding to the brand in two ways. These are feelings and judgments. Consumers will always make judgments about a company’s product based on superiori ty, quality, and credibility. Consumers will also respond to a company’s brand based on how it makes them feel. The final step in the customer based model is resonance, which is the most difficult level to reach in brand equity. This is where consumers will have a psychological bond with the company’s brand. This usually takes many years for a company’s brand to attain this level. If a business establishment attains this stage, then brand equity will be realized in the company’s product. In conclusion, brand equity has been important over the years because it is believed that a brand is among the high value assets a business establishment can have. This is indeed a fact that is practiced in markets. Brand equity is applied in showing the extent to which consumers know about a product, and this goes a long way in attracting loyal customers and boosting sales. Question 2 Adaptive marketing communication strategies are approaches in marketing that adapt to c hanges in various factors as a result of time. One of the major factors that results in the use of adaptive strategies of communication is technological changes. Technology changes have revolutionized a lot not only in communication, but in almost all sectors of the economy. Adaptive marketing communication strategies make sure that a company is ready for any change in the communication sector of the

Civilians On The Battlefield Essay Example | Topics and Well Written Essays - 2250 words

Civilians On The Battlefield - Essay Example The growing dependence on contractors in today's nonlinear battlefield, combined with its explicit inclusion stated in the current military strategy, provides the need to critically examine the subject of contractors on the battlefield. There are many challenges with civilians on the battlefield; however, increased use of civilians has changed the face of combat for the military because Global War on Terror (GWOT) has advocated an increasing number of civilians on the nonlinear battlefield. The growing dependence on contractors in today's nonlinear battlefield, combined with its explicit inclusion stated in the current military strategy, provides the need to critically examine the subject of contractors on the battlefield. To bind this complex area of study, this paper will briefly discuss the background of contractor support to the military and review the current policies and doctrine involving logistical services provided by contractors in combat operations, specifically focused on the United States Army. The use of contractors for operational support is an acceptable risk for the combatant commander as the contractors are generally achieving their mission. Current force structure requires the use of contractors for contingency operations and there are many considerations to ensure the combatant commander is properly supported Civilians have participated in military operations from t... During the Revolutionary War civilians were called "Camp Followers" as they followed the Army from camp to camp. They were most often wives and children of the soldiers and they functioned as cooks, nurses, and mended clothes. Some were even paid for their services. (Van Cortland House Museum) Prior to Operation Desert Shield/Storm policies and procedures that governed civilian personnel during combat operations were ambivalent or nonexistent. Civilian contractors were used extensively during the Vietnam War. "The heavy use of contractors during that War led the Army to determine that a need existed for a preplanned method for utilizing Contractors on the Battlefield" (GlobalSecurity.org, 1). Policies and procedures codified in directives and regulations following Desert Shield/Storm were a vast improvement over previous documents. During this war there were many contracts awarded for logistics support. This resulted in uneven results. The need for a regulated system to award contracts was evident. Current policies and procedures provide clarity and direction. Issues exist with compensation, Emergency-Essential (E-E) position designation, and accountability. Given that the Army is operating in an asymmetric environment, policies and Procedures that govern E-E civilians must change to meet the new environment. II. Civilian contractors are an asset and combat multipliers. Civilian contractors are assets to combat commanders especially when it comes to logistics. LTG Walker (Commander, 8th US Army, Korean War) said it nicely: ""There is no one but yourself to keep your back door open. You can live without food, but you cannot last long without ammunition." Logistics are vital to war fighting. Civilian contracted logistics

Writing an event Essay Example | Topics and Well Written Essays - 1000 words

Writing an event - Essay Example The intricacies of a busy family life then was the culprit for my entering school almost two months after the official opening of classes. I gathered, they just forgot. I can still remember the fear I have inside with my heart throbbing ferociously. There I was in my crisp new uniform with a heavy bag loaded with books sheepishly creeping in the classroom accompanied by my mother. Her warm hands clasp my cold sweaty palms. There she was, the teacher, smiling and beckoning me to her side. She briefly made a short, rather loud introduction in front of those staring, rather, glaring eyes attached to little children seated in their respective desks. I somehow wondered how in the world did I get an instant desk. And how come they all seem to know each other – whispering to each other (aloud) –when I could hardly recognize any of them? My mother started to bid me goodbye but I refused to get my sweaty hand’s grasp out of her warm palm. No, mommy! Don’t leave me here with these strangers all staring at me like I am some alien from another world – so I thought. With relentless reassurance from Miss Cruz (who started to take my hand off from my mother) and my mom who promised she would stay only outside the classroom where I can still see her and wait until classes are over – did I finally succumb. Anyway, they added, recess is almost near. What is the world does that mean? I wondered. After being seated, a girl right beside my desk, in braids and spectacles, Rebecca, started to talk to me. She asked me what my name was and offered to assist me in the topic they were discussing when my entrance rudely interrupted them. She appeared friendly and her spectacles prevented me from seeing her stare. After that tragic, drastic, nerve-wrecking day, as a naà ¯ve girl of five, I started my academic journey of which until now, several challenging years after, I still

Evaluation essay Example | Topics and Well Written Essays - 500 words

Evaluation - Essay Example For the potential buyers of these cars, this price difference should not be a consideration, provided they are satisfied with other features of the car. A clear advantage with the Camry range is that there are five different variant models on offer, with Hybrid varieties too made available to the customer, although this could cost an additional $5,000 on the basic model. The Honda Accord on the other hand Honda Accords comes in just two models. Moving on to other features of the cars, the Toyota Camry models score more points for their superior aesthetics and visual appeal. For example, the Camry has a rounded exterior, with a clean, tidy look which would appeal to buyers from the professional classes. Honda Accord, in contrast, has elements of a sports car, with sleeker and pointed exteriors, suggesting that the car would appeal to young car enthusiasts rather than older, higher income demographic groups. The Honda Accord Coupe has a 268-horsepower engine (V-6), takes lesser time to go from 0 to 60 and offers better fuel efficiency system, along with a lower center of gravity structure and â€Å"independent multi-link rear suspension†, which is supposed to provide greater control over the car. The Camry models too offer V-6 engines and greater car stability features, not by default but as additional options, which translates into more expenses for the customer. Both cars offer deluxe and comfortable leather interiors. As for safety features such as airbags, seatbelts, etc, both cars are similar. In other words, the safety and performance features of both cars meet standard expectations. Hence, neither car is overall better than the other. The final choice of a customer will depend on his/her age, location (urban, rural, etc), income, marital status, etc. Young men, who are not yet married, will more likely go for the Honda Accord Coupe, for its

My hypothesis is How can nutrition help fight depression and boost Literature review

My hypothesis is How can nutrition help fight depression and boost mood and the corrlation bewtween them - Literature review Example In fact, more and more experts and people are realizing that diet and nutritional supplements not only helping in fighting depression but it also helps in curing depression and even preventing it in the first place (Wiseman, 2002). Diet and Depression Before even shedding light on the link between depression and diet, it is important to know that depression is a very critical and increasing phenomenon in the western world and especially in the United States. The figure presented above shows that in the year 2006 more than 5 percent of the population in the United States was diagnosed with depression. Diet plays an important role in influencing the mood and behavior and individuals. The same is evident from the figure presented above from Academy of American Family Physicians, which clearly shows that the cure for most of the depressive disorders lies in medication and diet (Wagemaker, 2009). This is true because neurotransmitters, which are responsible for controlling our behavior an d moods are controlled by what we eat. Dopamine, serotonin, and norepinephrine appear at the top of the list of the neurotransmitters, which have their association with mood (Alaimo, Olson, & Frongillo, 2000). Important here to note is that any deficiency, excesses or imbalance in these neurotransmitters eventually result in mood swings, behavioral alternations, and impact on the perceptions of any person about pleasure and pain (Carroll & Royal Society of Canada, 1998). Serotonin plays an important role in mood, sleep, relaxation and appetite (Barker, 2002). Dopamine and norepinephrine are responsible for regulating and creating feelings and perceptions about hunger, thirst, digestion, blood pressure, aggression, sexual tendencies, breathing and respiration and others (Gropper, Smith & Groff, 2008; Licinio & Wong, 2005). A recent large cross sectional conducted by Australian researches under the umbrella of University of Melbourne reached interesting conclusions that women are more inclined towards eating a traditional diet are 30 percent less likely to face problems such as depression, dysthamia, stress and other anxiety related disorders (Escott-Stump, 2008). On the other hand, women who consume a more western diet were on a 50 percent more risk than other to face issues such as stress and depression (Markus et. al., 1998). Important here to note is that this has been one of those studies, which has looked on the link between the â€Å"whole diet† and â€Å"depression† whereas, other studies have tried to examine the impact and relationship between specific nutrients and their impact on moods and depression related illness (Whitney & Rolfes, 2008). This study was conducted with 1046 women, which were between the ages of 20-94. The diet of respondents was monitored with the help of a comprehensive questionnaire, extracted from the Cancer Council Victoria dietary questionnaire. The questionnaire has the room for noting around 74 different foods and 7 alcoholic beverages. The research took place over the time of 12 months (LaHaye & LaHaye, 1996; O'Connor, 1997; DeBruyne, Pinna, Whitney & Whitney, 2008). The principal researcher Felice Jacka, even provided concluding remarks in these words, â€Å"Simply put, if you habitually eat a healthy diet that includes fruit, vegetables, whole grains, and high-quality lean meat, then you may cut your risk of

Leonardo DiVinci Research Paper Example | Topics and Well Written Essays - 1500 words

Leonardo DiVinci - Research Paper Example The latter was highly impressed with the boy’s talent and Leonardo thus â€Å"entered the studio† of an artist and sculptor, where he met several other craftsmen, including Botticelli and Lorenzo Di Credi (Brockwell 4). The interaction he had with many such artists had a profound impact on him and it also bred in him a sense of competition. The most unique trait about Da Vinci was that he had ventured into all areas of â€Å"human learning† and left an indelible mark there (Brokwell 4). He, thus, nurtured a yearning for attaining perfection over his peers and became one of the most renowned artists in this world. His legacy to the human civilization came from a wide range of disciplines such as science, art, philosophy, sculpture, architecture, mathematics, engineering, writing and music. Leonardo Da Vinci had a lot to offer the world and he was greatly influenced by the time he was born in, the Renaissance period. His genius was further enhanced and shaped by the art training he underwent in Florence, a city prominent for its art. His apprenticeship under A D Verrocchio lasted for seventeen years. In the year 1469, Lorenzo and Giuliano de Medici embraced their duty to rule Florence as heirs to the throne, after the death of their father. This was good news for Leonardo, as both of them were art lovers and they understood full and well the significance of art. In 1472, Leonardo â€Å"became a member of the painter’s guild† of Florence, as he was qualified to be master just like the rest of the members (Koestler-Grack 128). His earliest work is thought to be the portrait of the ‘Feast of Santa Maria delle Neve,’ which he painted in 1473. In 1476, Leonardo was charged with an â€Å"anonymous accusation of sodomy,† but later the charge was dropped as there were no valid evidences (Greenberg 308). Leonardo â€Å"witnesses† â€Å"Bernardo di Bandio† being

Birthright citizenship in the United States of America Essay Example for Free

Birthright citizenship in the United States of America Essay In â€Å"Americanism,† Theodore Roosevelt describes the meaning of hyphenated Americans and their lives in the United States. There was no room in Roosevelt’s America for immigrants or sons of immigrants, who cling to the speech, the customs, the way of life, and the habits of thought from the old world which they have left. The hyphenated American is not an American at all. Those immigrants who hyphenated their Americanism, modifying it with the land of their or their parents’ birth, were and could not be true Americans. These Americans also can vote and be the primarily citizen of a foreign country. Roosevelt writes that the foreign-born population must be an Americanized population. They must talk the language of its native-born fellow-citizens; possess American citizenship, American ideas and maintain an American standard of living. The immigrants must not to be allowed to drift or to be put at the mercy of the exploiter. According to Roosevelt, America cannot afford to keep a lot of immigrants as industrial assets and not as human beings. We also cannot pay low wages to immigrants, and keep immigrants working on American mines, railways or working in our munitions plants because it is dangerous. All United States citizens must stand shoulder to shoulder for the elimination of race and religious prejudice. We must also improve maintenance of the American standard of living; direct every national resource, material and spiritual, and train our people to overcome difficulties. We can do all this work in a democratic country where all people have equal rights and hopes for a good future life.

Analysing obesity in the US

Analysing obesity in the US Obesity continues to be a growing crisis in the United States. Too many people arent taking into account that its become a serious health threat that people can prevent, but its as if people arent trying. Too much food in too many places and so much technology made for so many different things are causing people to notice their waistlines expanding. People claim that they cant help how heavy they and blame it on things such as not be able to exercise because theyre too busy, when its a number of different things. People need to start doing things in their every day life to avoid becoming obese. It seems like now days Americans are worried about their weight more than ever. With all the diet pills, health clubs, and just plain fitness craze one would think the United States would be in pretty good shape, but its the complete opposite. The more variety of unhealthy foods that are offered and the more short cuts technology are providing now days, the more Americans find their waistlines expanding. Why is it that healthy foods are so expensive and junk food is always five for the price of one? Obesity is a major problem in the United States today. With all the troubles and worries in the world, obesity is quickly becoming a very important problem to worry about. It can basically be made into a life and death situation. The parents that just sit on the couch eating chips while setting an example for their children, the schools that want to cut their physical education class, the greasy foods that fast food restaurants provide, and the major food companies that keep coming up wit h new ideas to add to the number of unhealthy choices Americans make are just a few of the many causes of this rising epidemic. Obesity is continuing to get worse as more and more people continue to eat themselves to the point where they cant do anything about it. Americans are literally eating themselves to death and do not realize it. The government continues to warn that obesity is getting out of control and something has to be done, but how is anything going to get done if nobody is doing anything about it? According to Arkansas Governor Mike Huckabee from an article written by Karen Tumulty, if someone isnt willing to step in, the generation of young Americans being brought into this world today is being expected to have a shorter life span than their parents and even their grandparents (Tumulty, 2006). There are so many choices in todays food and nearly half of Americas food is proven to be unhealthy. It is not easy to make the choice between a salad with low fat dressing versus a quick plump juicy burger from McDonalds. Children are being taught that its okay to eat fast food, and arent being pushed to eat their fruits, vegetables, as well as many other things that are needed for a healthy diet. According to Kaplan (1998), â€Å"children learn to eat the wrong foods and consume empty calories from junk food each day† (p. 218). As children get older, they wont know how to make the right choices between healthy snacks and junk food. America will soon find that obesity rates have sky rocketed, and they wont be able to do anything about it. Time is running out, and someone has to step in to stop this soon to be number one killer. Although metabolism has to deal with the way people burn the food they eat, doesnt mean that the metabolism they might get from their parents is going to make them obese. Bjorntorp (2001), stated that â€Å"several observations point in the direction that physical inactivity is the main cause of the obesity epidemic† (p. 1006). If one doesnt exercise how do they expect to maintain a healthy weight? People have to eat in order to survive. Its what they eat, and how much they eat that plays a part on how their body looks. Children weight more today than they did 20 years ago and the main problem appears to be not getting enough exercise (Kaplan, 1998). How does a person think they are going to remain healthy if they dont somehow burn some of the calories they ingest daily? America is surrounded by unlimited, easily available foods. Nobody ever has to worry about running out of food. Although its hard to fight off the urge to reach for that bag of chips, its quite possible. Peopl e have to learn self will and the fact is that the more weight people gain the harder it is for them to lose weight. As just mentioned, exercising helps a person lose weight, but if someone has McDonalds for lunch and supper every day then run over five miles daily isnt going to help them to be healthier. They may not become obese, but once they become older and arent able to run as much as they used to, then they soon find their metabolism slows down. They now have to change their eating habits because they start having health problems that interfere with their everyday life. It doesnt matter how active someone can be, having an unhealthy diet can cause serious health problems later down the road. Obesity cant be blamed on only one thing; its a number of different things. Of course eating healthy is a sure way to fight off obesity. According to an online source, a studys lead author â€Å"blames the environment in which Americans live.† He says, â€Å"there is too much food available, social situations encourage overeating, restaurants compete with each other by offering bigger and bigger servings and technology has made it possible to avoid exercise† (1998). If we have problems now with trying to find ways to be active, imagine how it will be like ten years from now. Pretty soon things will be so easy that nobody will care they are obese when in todays society obesity is looked down upon. How far is this rising epidemic going to go? Discrimination goes back to the early Christian church when gluttony was one of the seven deadly sins. According to Spake (2004), â€Å"obesity was viewed as the outward manifestation of the ‘sin of overindulgence† (p. 52). It seems like today the media is trying to make it look like being overweight isnt bad. Although obesity is brought up as such a major problem, why is the media trying to make it look like being overweight isnt bad? Some would argue that its for the teenage girls that are struggling with an eating disorder. Seeing skinny models all over the television screen doesnt help teenage girls with problems like that, but seeing bigger people; even obese people, all over the television screen doesnt help children figure out that eating healthy helps you to remain fit either. Obesity can cause a lot of problems in a persons life; problems that are preventable. Becoming obese has many health problems related to it. So far, obesity is catching up to smoking as the number one cause of preventable death. According to the American Obesity Association major insurance companies boost coverage for obesity treatment and prevention, and a persons lifespan may be cut short by obesity. Obesity carries the major risk for getting type II diabetes, cardiovascular disease, stroke, and some cancers. Tumulty (2006) stated that, â€Å"health care providers say they are seeing something of an epidemic of potentially lethal Type II diabetes, once known as the adult-onset version of the disease, among children as young as 10 and 11† (p. 40). How are the next generations going to survive when America provides to this deadly disease known as obesity. Children learn how to eat healthy at a young age. Fact is that if children are fed healthy foods, and are taught to eat healthy foods at a young age then they are bound to keep it that way as they get older; this has to start with the parents. If parents sit on the couch and eat high fat foods then tell their children to eat right and go out and exercise isnt gong to get the job done. Parents have to keep foods that are high in fat, and sodas that are high in sugar out of the house. They should have fruits and vegetables on hand so their children learn to eat healthy. Children can have pretty much all they want of fruits and vegetables. In an interview done by Nanci Hellmich (2006) with nutrition professionals it was stated that eating habits begin with the parents. Eat healthy foods such as fruits and vegetables and stay away from the high fat and deep fried foods. Also be sure to have some sort of physical activity daily (p. 8d). Parents have control over what their child eats at a young age, but once the child starts to go to school, its hard to see what the child eats. This is where the school should step in. Standards should be set with the types of foods that are provided in school lunches, but how is this going to be done if there isnt any intervention from the school itself? People have control over their own body, but these day its hard for working parents to find time to prepare meals from fresh food when all they have to do is pay for cheep fast food that can by bought in big portions. Its also hard for children going to schools that are getting rid of their physical education classes and playgrounds because the school doesnt have enough money to support such things. Instead they allow vending machines and food advertising in their buildings. The article Junk Food Nation by Gary Ruskin and Juliet Schor is trying to tell people that junk food has become a major problem in the US today concerning obesity and certain people arent taking into consideration that it actually is a real problem. They blame it on other things like watching too much TV and not exercising enough. They dont think the greasy foods that fast food restaurants provide and the king sized bags of candy that gas stations sell as well as lunches that schools sell dont play a part in the young obesity in this country. When really it plays a big part and the people that should care about this problem leave it up to the people that really dont have much control over it (Ruskin Schor, 2005). If a child goes to a school that doesnt have any physical education classes and receives a unhealthy lunch everyday is bound to live an unhealthy life-style. Children these days are getting bigger than ever and its as if nobody cares. It also seems like the media is targeting the youth of the United States. Tumulty (2006) stated that, â€Å"the rates of obesity among children and teens have tripled in the past 25 years† (p. 40). The next generations are going to be bigger than ever. According to an article by Gary Ruskin and Juliet Schor (2005), â€Å"Kraft announced it would no longer market Oreos to younger children, McDonalds promoted itself as a salad producer and Coca-Cola said it wont advertise to kids under 12. But behind the scenes its hardball as usual, with junk food giants pushing the Bush Administration to defend their interests† (p. 15). Children these days are getting bigger than ever. Its not just because of the foods they eat, its because theyre parents and how they set an example for them, the school lunches theyre provided everyday, and the chances they actually get to be outside or just plain get to get up and do something. If schools are getting rid of their physical education classes, how are todays youth and Americas future youth going to be able to stay fit? With how bad obesity is now, why is America making it worse? Schools need to make it clear to children about the effects of eating unhealthy. Grimm (n.d.) stated that a â€Å"Department of Agriculture study calculated that 95% of the 10,000 food commercials children see each year pitch high fat, high sugar products† (p. 108). How far are big food companies willing to go to make the future generations of America even unhealthier than it already is? America knows that obesity has become something serious, yet schools are marketing to their students with allowing vending machines with unhealthy foods as well as soda machines with drinks that are high in sugar and calories while getting rid of their physical education classes because they dont have enough money to support it. Vending companies are offering schools money just so the school will market their product. Its almost as if food companies are more worried about their own businesses rather than worrying about this growing health issue occurring in the United States. Overeating seems to be a problem in the United States today. This can be one of the main causes for the number of obese people in America. Restaurants provide huge meals and fast food restaurants provide large portions of greasy foods for cheep. A glycemic index (GI) indicates the rate at which carbohydrates are digested and absorbed and this can also trigger over eating (Amersbach, 1999). Foods with a low GI includes fruit and vegetables; foods with a medium GI include milk and oatmeal; and foods with a high GI includes the foods that Americans love such as muffins, donuts, and so on. If one eats a low GI breakfast its been proven that they feel fuller and eat less through out the day. If one eats a high GI breakfast then those people usually find that theyre eating an hour later because they feel hungry. If a person is hungry two hours after a meal, the fact is that theyve eaten the wrong foods. Obesity can cause a lot of problems in a persons everyday life. Imagine going to a theater and not being able to fit into the seats or having to buy an extra plane ticket because its not possible to fit into just one seat, but most of all imagine going out in public while having every person just stare. Obesity doesnt just cause health problems; it causes mental and physiological problems as well. How can eating; the simplest thing ever, turn into something so deadly? Why do people seem to indulge in so many unhealthy foods when they know the consequences? With all the choices there are in America and all the marketing for unhealthy foods, it shouldnt surprise people that obesity has become a fatal problem in the United States today; a fatal problem that can be prevented. If something isnt done now, obesity will continue to threaten the lives of many. How can one avoid becoming obese? Its simple; eat right, exercise, and remember that obesity is a disease that is treatable, but one h as to be willing to help their self. No drugs and prescriptions can treat this disease. Its the personal responsibility a person must have to keep their body fit and to live a healthy lifestyle. References Amersbach, G. (1999, November). Friedman School of Nutrition Science and Policy. In a low-fat world, why are Americans getting fatter? Retrieved April 10, 2008, from, http://nutrition.tufts.edu/magazine/1999fall/ roberts.html. Bjorntorp, P. (2001, September 22). Thrifty genes and human obesity. Are we chasing ghosts? Lancet, 358, 1006-1008. Retrieved April 10, 2008, from EBSCOhost. CNN.com. (1998, May 28). Study: Americans fatter than ever and getting even fatter. Retrieved April 10, 2008, from, http://www.cnn.com/HEALTH/9805/28/obesity/ Grimm, M. (n.d.). Is marketing to kids ethical? Business, pp. 107-112. Hellmich, N. (2006, April 5). How parents can handle the sensitive but critical topic of weight. USA Today. Retrieved April 10, 2008, from EBSCOhost. Kaplan, P. (1998). Human Odyssey: Life-Span Development. Sixth Edition.: Brooks/Cole Publishing Company: Pacific Grove, CA. Ruskin, G., Schor, J. (2005, August 29). Junk food nation. The Nation, 281, 15-17. Retrieved April 10, 2008, from EBSCOhost. Spake, A. (2004, February 9). Rethinking weight. U.S. New World Report, 136, 50- 56. Retrieved April 10, 2008, from EBSCOhost. Tumulty, K. (2006, March 27). The politics of fat. Time, 167, 40-43. Retrieved April 10, 2008, from EBSCOhost.

Factors Affecting The Anodizing Of An Aluminum Metal

Factors Affecting The Anodizing Of An Aluminum Metal Anodizing is a process for producing decorative and protective films on articles made from aluminum and its alloys. It is essentially a process where a thick film of aluminum oxide is built up on the surface of the aluminum through the use of a direct current electrical supply. In the majority of anodizing plants in New Zealand it is carried out in an electrolyte bath containing sulfuric acid with aluminum sheet cathodes and the work to be anodized attached to the anode (Figure 1). When the current is flowing in the cell the following sequence of events is believed to occur. Sulfuric acid begins to decompose, the hydrogen ions moving to the cathode where they are reduced to hydrogen gas: 2H+ + 2e- à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ H2(g) (1) Simultaneously, negatively charged anions, i.e. hydroxide, sulphate and maybe oxide ions move to the anode. The electrical charge in the circuit causes positively charged aluminum ions (Al3+) to be generated in the anode and in turn move toward the cathode. At the anode surface they react with the oxide/hydroxide ions to form aluminum oxide (in the case of the hydroxide ion, hydrogen ions are released into the solution). There are two types of ions involved in any Electrolyte. The reactions take place and Anions and Cations are formed and transferred to the opposite ends of an Electrolyte. Anions are positively charged ions and Cations are negatively charged ions in an electrolyte. In chemistry, an electrolyte is any substance containing free ions that make the substance electrically conductive. The most typical electrolyte is an ionic solution, but molten electrolytes and solid electrolytes are also possible. Ion is a particle which is electrically charged either positive or negative; an atom or molecule or group that has lost or gained one or more electrons. An ion is an atom or molecule where the total number of electrons is not equal to the total number of protons, giving it a net positive or negative charge. An anode is an electrode through which electric current flows into a polarized electrical device. A cathode is an electrode through which electric current flows out of a polarized electrical device. Anodizing is a method of electrolytic passing to increase the thickness of the natural oxide layer of the surface of various metal parts. This process is called anodizing because the part which to be treated forms an anode electrode of the electrical circuit. Anodizing mainly increases corrosion resistance and provides better bond for paint primers and glues than bare metal. Anodizing is even used to prevent galling of threaded components and to make dielectric films for electrolytic capacitors. Anodic films are most commonly applied to protect aluminum alloys, although processes also exist for titanium, zinc, magnesium, niobium, and tantalum. This process is not a useful treatment for iron or carbon steel because these metals exfoliate when oxidized; i.e. the iron oxide, flakes off, constantly exposing the underlying metal to corrosion. Anodizing changes the texture of surface and also changes the crystal structure of the metal near the surface. Thick coatings are normally porous, so a sealing process is often needed to achieve corrosion resistance. Anodized aluminum surfaces, for example, are harder than aluminum but have low to moderate wear resistance that can be improved with increasing thickness or by applying suitable sealing substances. Equations of the anode reactions Al à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Al3+ + 3e- (2) 2Al3+ + 3O2- à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Al2O3 (3) 2Al3+ + 3OH- à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Al2O3 + 3H+ (4) For which the overall process is: 2Al + 3H2O à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Al2O3 + 6H+ + 6e- (5) The sulfate ions also play some part as the oxide coating contains 12 15% sulfate ions. It is suggested that the sulfate ions facilitate the movement of hydrogen ions reducing the cell voltages required. THE DEVELOPMENT OF THE ALUMINIUM OXIDE LAYER Fresh aluminum reacts readily with oxygen to produce aluminum oxide. Once formed the oxide remains firmly bonded to the surface forming an impenetrable layer. Consequently, further reaction ceases. The film is very thin (0.01m), and despite its tenacity it can be removed by abrasion and chemical corrosion. In such instances the aluminum is subject to wear or the surface will mark or become pitted at the site of corrosion. Anodizing produces much thicker coatings (12 25 m) which, if properly sealed, can extend the life of the surface appreciably. Recent research in New Zealand has shown that pitting of the surface can be reduced by up to 90% with a 12 m coating, and by up to 93% with a 25 m coating. In the initial stages (i.e. first 60 s) of anodizing the oxide layer formed is dense and of even consistency. It provides the greatest resistance to wear and corrosion and consequently is called the barrier layer. The growth of this layer ceases when the high electrical resistance of the oxide reduces the potential of the applied voltage in the electrolytic cell. The depth of the coating at this stage is about 0.08m. Subsequent growth is very slow and competes with the acid reaction: Al2O3 + 6H+ _ 2Al3+(aq) + 3H2O which releases Al3+ ions into the solution. Note that the H+ can be at high concentration near the oxide layer due to one of the anode reactions above. See equation (5). At low applied voltages only the barrier layer forms. However, the gradual production of Al3+ ions tends to smooth out the underlying metal surface and give a brightening effect to the article. Objects such as wheel trims and bumper bars are general treated in this way. At higher voltages the growth of the layer continues beyond the barrier layer. Unlike the initial barrier layer this secondary layer, although constitutionally the same, has an open pore-like structure; a consequence of the competing anodizing and acid solution processes. Electron photomicrographs reveal the structure of these anodized surfaces to be as shown in Figure 2. The conditions required to produce coatings vary according to the concentration and nature of the electrolyte, the voltage current density applied, the alloy being anodized and the temperature of the bath. In the majority of electrolytic plants articles are anodized at a potential of 15 20 V and a current density around 1.6 A d-1 m-2; the electrolyte is 3.5 mol L-1 sulfuric acid maintained at temperatures between 20 and 23oC. Under these conditions the quality of the coating is satisfactory for most applications. At higher electrolyte concentrations and temperatures, and at lower voltages or current densities, the acid solution process occurs earlier in the development producing thin, open oxide coatings. Conversely, hard dense coatings are produced at low temperatures and high current densities. The conditions established in each plant are determined by the type of application. PRE-TREATMENT Step 1 Cleaning Correct and adequate cleaning of the aluminum object prior to anodizing is essential if the finished work is to have a uniform and attractive appearance. When aluminum arrives from the rolling, casting or extrusion mills it may be soiled following ways: Carbonaceous deposits from the surface of forgings and die castings Traces of oil-based lubricants Traces of polishing compounds or sanding grits Oxide films from heat treatment Cleaning these soils from the surface may prove difficult, especially if the requirements of the work do not allow etching of the surface. Most cleaning solutions used in New Zealand operations are detergent based. In addition to the detergent, a wetting agent and a complexion compound may be used. The complexion compound frequently used is sodium polyphosphate a component of many soap formulations which prevents ions, such as Fe3+, adhering to the surface of the work. If etching is not a problem, sodium hydroxide or sodium carbonates (Na2CO3 / NaHCO3) may be added to increase the effectiveness of the solution. Step 2 Etching Etching is most often achieved by the use of a warm, 10 % (2.5 mol L-1) sodium hydroxide solution. It gives the surface of the metal a light grey satin finish (through diffuse reflection of the incident light). The vast majority of work is pretreated in this way. In theory the reactions occurring in the etching solution are: The etching reaction: 2Al + 2NaOH + 2H2O à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2NaAlO2 + 4H2 (7) Dissolution of the aluminates: NaAlO2 + H2O à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ NaOH + Al (OH)3 (8)   Dehydration of the solid hydroxide: 2Al(OH)3 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Al2O3 + 3H2O The rate of etching is dependent on the concentration of the sodium hydroxide solution, the temperature and the concentration of aluminum ions which are released into the solution. When high concentrations of aluminum ions are present the solution loses its effectiveness. Presence of other ions, some of which may be a component in the alloy, can also interfere in the process, causing blemishes to appear on the surface of the work. The problem of ion contamination is overcome by employing etching solutions which suppress the action of the Al3+ and other metal ions released. The compositions of these solutions are the propriety of the companies that develop them, but generally contain sequestering agents which complex metal ions. Such solutions do not have an infinite capacity to do this but, due to the carryover of solution by the etched work and periodic replacement by fresh etch solution, the etching batch is maintained in an effective condition (Figure 3). Foaming agents are also a constituent of the etching solution; their action is to reduce the pungent mists/fumes that result from the vigorous reactions that occur. It is important to note that the appearance of the end result is determined at this stage. Work which is poorly etched will reveal scratches or blemishes no matter how well it is anodized or colored. POST TREATMENT After cleaning and anodizing the work is colored and sealed. As all anodized work is sealed, sealing will be considered first, although if coloring is to be done it is carried out prior to sealing. Sealing Sealing is the process in which the pores at the surface of the oxide layer are closed off. It is affected by placing the anodized object in boiling water for a 15 20 minute period. During that time the water reacts with the aluminum oxide to produce the mineral Boehmite Al2O3.H2O or AlO.OH: Al2O3 + H2O à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2AlO.OH Boehmite is a hard, transparent material with a greater volume than the aluminum oxide. As it forms it closes off the openings of the pores. As would be expected, the durability of the anodized surface, especially in regard to chemical corrosion, is greatly influenced by the effectiveness of the sealing. If the duration of the sealing is too short the pores, although constricted, remain open for corrosion agents to be in close proximity to the aluminum surface. Corrosion studies have shown that anodized aluminum which has been sealed for 15 minutes or more has greatly increased resistance to pitting by chemical corrosion agents such as H+ and Cl-. Colouring Colouring involves the absorption of a coloured dye into the pores of the oxide coating which becomes fixed after the sealing process has been completed. Dyestuffs which can bond to the oxide or metal ions in the anodized layer have better colour properties than those that do not. Electrolytic colouring is the most important method of colouring anodised aluminum today. It produces attractive finishes of very great colour and heat fastness and is easy to perform. The anodized work is dipped in a tank containing coloured ions of other metals. Under the influence of alternating current the colouring agents deposit rapidly at the very base of the pores and the take is even over the entire surface. Unlike the process of dye absorption, electrolytic colouring is easy to control and gives uniformity of colour from one run to the next. The success of this technique is evident in the widespread use of bronze colored aluminum in joinery and house fittings. Approximately 66% of all bronze tinted aluminum is coloured by this technique. To a much lesser extent coloured inorganic compounds can be used to colour the work. Ammonium ferric oxalate is a very common compound used to impart a goldy colour to the metal. Other colours can be impacted by treating the absorbed ferric ammonium oxalate with other compounds: for example, potassium ferrocyanide solution will react with the ferrioxalate compound to produce a blue colour. The technique used is to dip the work firstly in a solution of the ammonium ferrioxalate followed by dipping the work in the potassium ferrocyanide solution. This double dipping technique can be used with other compounds to produce a variety of colours: e.g. copper sulfate followed by ammonium sulfide gives green, and lead nitrate followed by potassium chromate gives yellow. Experiment on Anodizing of aluminum Method Before the demonstration Line the inside of the sides of the 1 dm3 beaker with a double thickness of aluminum foil. Fill the beaker with sulfuric acid. This should be at about 25 C adjust the temperature if necessary. Set up the electrical circuit shown in the figure. Make up the dye solution according to the instructions supplied (i.e. dissolve the contents of the tin in about 600 cm3 of water) and add a few cm3 of glacial ethanoic acid. The demonstration De-grease the aluminum strip by rubbing with a tissue soaked in propanone and then dip the strip into a beaker full of propanone for short time and allowing drying. From now on, hold the aluminum by the top few cm only. Dip the bottom half of the aluminum strips into the sodium hydroxide solution in a beaker. Leave it until it begins to effervesce, indicating that the surface layer of oxide has been removed. (This will take about one minute.) Now remove the strip and dip the cleaned portion of it into the nitric acid for a few seconds to neutralize the alkali. Then rinse away the acid with water. Clamp the strip so that the lower, cleaned, section is immersed in the sulfuric acid electrolyte and is in the centre of the cylinder of aluminum foil which forms the cathode. It must not touch the cathode. Complete the circuit with crocodile clips making the aluminum strip positive and the foil negative. Now adjust the power pack and rheostat so that current flows which give a current density of 10 -20 mA cm-2 of anode area immersed. For example if the anode has an area of 3 cm x 3 cm immersed, the area will be 3 x 3 x 2 cm2 = 18 cm2 so the current should be between 180 and 360 mA (0.18 and 0.36 A). Leave to electrolyze for about 30 minutes, keeping an eye on the current and adjusting the rheostat if necessary to keep its value constant. (The current may tend to drop as the oxide layer thickens.) When the electrolysis is complete, switch off the power and remove the aluminum strip. Rinse the strip in water. It will not look very different at this stage. Now dip the strip into about 200 cm3 of the dye solution in a beaker. Make sure that some of the non-anodized part of the strip is immersed as well as the treated section. Leave for about 15 minutes longer immersion will produce a deeper colour. Some of those who trialed this demonstration left the strip in the dye overnight. Rinse to remove any dye which has not been absorbed. Dye will only be absorbed by the anodized section, which will turn a deep cherry red. If desired, seal the dye by immersing the dyed strip for a few minutes in water that is already boiling. This will make the colour less prone to rubbing off, but will wash out some of it. Many teachers may prefer to omit this procedure. Visual tips Large demonstration meters will be easy to see. Long connecting leads are useful to prevent the electrolysis tank becoming lost in a maze of wires. Teaching tips It would be wise to prepare something to fill in the half hour of electrolysis time and the 15 minutes dyeing time. The class could be asked to calculate the expected increase in mass of the anode or to discuss the chemical reactions involved. Have a selection of anodised objects such as saucepan lids available for the class to look at. The demonstration (No. 18) of the reactivity of aluminium without its normal oxide layer could be shown. Some teachers may prefer to anodise some aluminium before the lesson to have some pieces ready to show the class. Theory Untreated aluminium has a layer of oxide about 10-8 m thick. This explains its apparent lack of reactivity. Anodising, invented in 1923, is used commercially to thicken this layer to 10-5 m to improve the metals corrosion resistance. The relevant equations are: Cleaning: Al2O3(s) + 2OH-(aq) + 3H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢Ã¢â€š ¬Ã‚  2Al(OH)4-(aq) Once the oxide is removed: 2Al(s) + 2OH-(aq) + 6H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢2Al(OH)4 + 3H2(g) Electrolysis at the anode: 2Al(s) + 3H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢Al2O3(s) + 6H+(aq) + 6e- Electrolysis at the cathode: 6H+ (aq) + 6e- à ¢Ã¢â‚¬  Ã¢â‚¬â„¢3H2(g) Electrolysis overall: 2Al(s) + 3H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢Al2O3(s) + 3H2(g) The oxide coating develops a positive charge by the reaction: Al2O3(s) + H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢Al2O3H+(s) + OH-(aq). Thus it attracts dyes that contain coloured anions. These are absorbed in oxide layer which have pores, where they are trapped by heating the oxide to form an Al2O3.H2O seal. Extensions There are a great many variables in this experiment such as: electrolysis time, voltage, current density, concentration of electrolyte, temperature of electrolyte, temperature of dyebath and type of dye. Investigations of some of these could form interesting projects. It is possible to measure the gain in mass of the anode by rinsing the aluminium strip with propanone and weighing it immediately before and immediately after electrolysis. The Different of Anodizing And Electroplating Electroplating is a technique to plate some metal or non metal with metal using electric current. While anodizing is plate metal like aluminum by inserting some substance under the oxidized layer of aluminum by using of electric current force. The function and the effect of both process may the same, like have color surface so that can use as decorative purposes. Not all metal can use anodizing process but only certain metal can use this method to make endure to corrosion effect. Aluminum metal can be treated by anodizing because after electric current process make the aluminium have oxidized layer on the surface and this layer can have wide pore so that other chemicals like dye or prevented agent to be impregnated to enter this oxidized layer. After certain substance enter into this oxidized layer then by certain method the pore can be closed by further process. Actually by using just electric current will create anodized layer, but the problem this layer have no colour and look bad, to make this more interesting then on anodizing process using colour agent and inserted below the anodized layer. Electroplating is directly plate other metal into certain metal with the goal to make more interesting or make more endure to corrosion or from other outside effect. Like on hard chrome plating on screw driver, can make this surface hard and not easy to break if not plate by hard chrome. By nickel plating on other metal will make the surface is endure from reaction effect because nickel more noble than the metal below the nickel surface. Nickel plating usually use in canning process, or use in decorative accessories. Electroplating rely on the plate stick strong, more strong certain plating metal stick to the base metal is better. Electroplating Electroplating is plating to certain metal with other metal that is usually more durable from corrosion or stronger than original metal. The process itself use of electrochemical by which metal is deposited on the origin metal through the chemical bath. Usually using electrode pole that is connected to the negative and the other to the positive pole. Electrode on the negative pole is called as anode and electrode that connected to positive charge is called as cathode. Metal on the solution form will turn to positive ion and on the electrochemical process this ion will attract to negative electrode or to anode and will plate anode. So metal that will be plated is placed on the anode position. Electroplating is done in a plating bath which is usually a non-metallic tank like plastic or glass. The tank is filled by metal solution, which the metal kind will plate the anode. The anode is substrate to be plated which is connected to the negative terminal of the power supply. As we apply current, positive metal ions from the solution move towards anode with negative charge and deposit on anode. As a replenishment of these deposit ions, the metal from cathode will dissolve and goes into the solution and make the ionic potential balance. In the case using of noble metal like gold as cathode it is not sacrificial, but it is made out of materials which do not dissolve in an electrolyte such as titanium. Electrochemical Theory: Actually electroplating is based on the Faradays Laws that state as follows: The weight of a substance formed at an electrode is proportional to the amount of current passed through the cell. The weights of different substances produced at an electrode by the same amount of current are proportional to their equivalent weights. Corresponding mass in an oxidation-reduction reaction is = molar weight of the compound / algebraic change in oxidation number of the atom that is oxidized or reduced. 2 FeCl2 + Cl2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2 FeCl3 Fe valence is change on the reaction from +2 to +3. However on the reaction will: Mn + FeSO4 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ Fe + MnSO4 Chrome Plating Chrome plating is a part of coating technology that use of electroplating process. Electroplating process itself can use many kind of metal like chrom, copper, nickel, silver or gold. The process of all metal is similar, that is use of DC electric current and using of metal solution. But the differences of all the process generally on the solution uses, concentration uses, current flow, temperature limitation, plating time and many other limitation that difference of each metal coating. Chromium plating is also different among the result purposes from the current flow, chromium concentration and other chemical additive that is use on each of chromium plating kind. The chromium plating such as hard chrome, dull chrom, black chrome and bright chrome. Every result goal needs different parameter uses that must be followed in order to get the result as the process goal. So chromium plating process needs strict control on the bath concentration, equipment precision and on the method uses. Any small substance contain on chromium bath can result a different kind of product. Anodizing aluminum This is an experiment showing interesting application of electrolysis. The oxide layer on aluminum foil is made thicker by anodizing which improves the metals corrosion resistance. In the process, the thickened oxide surface coating is coloured by using dyes. Lesson organization This works well as a class demonstration, but there are several tasks to complete in preparation. The anodising process itself takes about 30-40 minutes, with nothing particularly dramatic happening, so you will need to plan other activities to fill the time. At the start of the experiment, show the students the effervescence due to the hydrogen evolved from the cylindrical aluminum cathode. A flexi camera connected to a projector could be used here. During the anodizing phase, the theory could be explained with an emphasis on the applications of the process. A collection of anodized objects such as saucepan lids or sports equipment could be available to look at. A well-disciplined and organised class might be able to carry out this process for themselves (in twos or threes), but it is strongly recommended that the treatment with sodium hydroxide solution (Corrosive) prior to the electrolysis is carried out under strict supervision. Apparatus and chemicals Eye protection,Low-voltage DC power pack, adjustable up to 10 volts, Connecting leads and 4 crocodile clips Paper clips, plastic Test-tube holder, wooden, Paper tissues Strip of wood, 15 cm long Ruler (30 cm), Beaker (1 dm3),Beakers (250 cm3), 3Aluminum foil, approximately 40 cm x 15 cm, Congo Red dye (Toxic) Ethanol (Highly flammable, Harmful) Sulfuric acid approximately 2 mol dm-3 (Corrosive), 1 dm3, Sodium hydroxide, approximately 1.5 mol dm-3 (Corrosive), 250 cm3. Propanone (acetone) (Highly flammable, Irritant) Technical notes Congo Red dye (Toxic). Refer to CLEAPSS Hazcard 32. Ethanol (Highly flammable, Harmful). Refer to CLEAPSS Hazcard 40 (2007: 40A) Sulfuric acid approximately 2 mol dm-3 (Corrosive). Refer to CLEAPSS Hazcard 98 (2007: 98A Sodium hydroxide, approximately 1.5 mol dm-3 (Corrosive). Refer to CLEAPSS Hazcard 91.Propanone (acetone) (Highly flammable, Irritant). 1 Reasonably thick aluminium foil should be used, but, if unavailable, ordinary kitchen foil works quite well. 2 Propanone is needed to degrease the aluminium foil and it is worth keeping a bottle specifically for this purpose. The used propanone can be poured back into the bottle and kept for future use. This reduces waste disposal requirements. 3 The solid Congo Red dye needs to be made up into solution. Use 0.5 g of dye, 50 cm3 of ethanol and 50 cm3 of water and warm to dissolve. Dylon cold fabric dye (Camilla A 16) also gives good results. Red fountain-pen ink can be used as an alternative but does not give such good results. 4 Instead of a power pack, a battery or series of batteries could be used. Procedure HEALTH SAFETY: Eye protection must be worn. Before the demonstration a) Cut two pieces of aluminum foil, one 10 cm x 3 cm (the anode), the other about 30-35 cm x 12 cm (the cathode). Ensure that when the foil is folded into a cylinder it fits inside the beaker as shown below. Anodising aluminium b) Work in a fume cupboard and ensure that there are no flames close by. Work on a clean surface. Degrease the two pieces of foil by rubbing well with a paper tissue soaked in propanone and then dip the strips into a beaker of propanone for a few seconds. c) Remove the strips of aluminum from the propanone and allow drying. From this point on, only hold the aluminum foils at the top edges. d) Arrange the larger piece of aluminum into a cylinder. Fix it in position with plastic paper clips and then place inside the large beaker as shown in the diagram. e) Set up the strip of wood on the beaker and use Bluetak to attach two crocodile clips, one at the edge and one in the centre. Attach the outer clip to the aluminum cylinder. This is the cathode. f) Pour some of the cold sodium hydroxide solution (Corrosive) into a 250 cm3 beaker. Hold the smaller piece of aluminum foil with a wooden test-tube holder, and dip it into the sodium hydroxide solution. After a short while, hydrogen gas will be given off rapidly. Remove the strip after a few seconds of fizzing, and wash it in a stream of cold running water. g) Attach the aluminum strip to the central crocodile clip ensuring that it is arranged vertically (see diagram). This central strip (the anode) must not touch the aluminum cylinder. h) Carefully fill the beaker with the sulfuric acid from a measuring cylinder up to a level about 1 cm below the top of the aluminum cylinder. SAFETY: Remember that hydrogen (Highly flammable) will be evolved during the electrolysis. Keep all naked flames well away from the experiment (e.g. when heating the dye solution). Demonstration a) Connect up the circuit and use a voltage of 5-10 volt. Electrolysis is occurring when bubbling can be seen at the cathode (hydrogen). Pass a current for about 20 minutes, or longer, if time permits. b) While the electrolysis is running, heat the dye solution in a beaker to about 70 °C. An electric hotplate is preferable to a Bunsen burner. An additional beaker of boiling water will also be needed. c) Remove the central aluminum strip (the anode) and place it in the hot dye solution. Stir and leave for about 10-15 minutes. d) Transfer the aluminum anode to a beaker of boiling water and leave for another 10 minutes. This seals the dye onto the anodized surface of the aluminum and makes the aluminum oxide layer less porous. e) The upper non-anodized portion of the strip should be the original metallic grey colour whilst the rest should be coloured red. The aluminum strip can be dried in paper tissue and passed round the class. It should not be possible to rub off the dye off the surface. Teaching notes The demonstration itself The instructions may seem very detailed, but experience shows that success depends on getting the conditions just right. You should try out the experiment before carrying it out as a demonstration. It would be useful to have some sample strips of anodized aluminium to pass round. The voltage will drop during the experiment, since the anode is becoming increasingly coated with aluminium oxide. If a rheostat and voltmeter are used, the readings can be constantly monitored and adjustments made to keep the voltage approximately constant. A longer immersion in the dye will produce a strip with a deeper red colour. Leaving the strip in the dye overnight produces the best results. If time is short, omit the dye-sealing stage in boiling water. If there is time, a piece of the cathode could also be immersed in the dye. It will be found that the dye is not taken up by the metal in the same way. This is a good experiment to show students towards the end of their study of electrolysis. Chemistry points When a piece of aluminum is exposed to the air, it rapidly becomes coated with a protective surface layer of aluminum oxide. Heating the aluminum in air can make the oxide layer thicker, but anodising is much more effective. The oxide layer can be made to absorb dyes. This is useful in a range of everyday goods, such as kettles, window frames and some sports equipment, all of which need to be able to withstand extreme physical conditions. Untreated aluminium has an oxide layer about 10-8 m thick. This explains aluminiums apparent lack of reactivity in the laboratory. Anodising thickens this layer to about 10-5 m and dramatically improves the metals corrosion resistance. Oxygen is often evolved at the anode during the electrolysis of aqueous solutions. Aluminium is a reactive metal. The oxygen formed reacts immediately with the aluminium. It forms a solid oxide coating on the surface of the metal electrode. Theory for more able students For students working at a higher ability level, some or all of the following equations and explanations could be introduced: The cleaning process with NaOH: (1) Al2O3(s) + 2NaOH(aq) + 3H2O(l) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2NaAl

How Does Light Affect The Rate Of Photosynthesis? :: essays research papers

Biology Investigation Problem: How does light affect the rate of Photosynthesis? The Plan In my experiment I am going to see how light affects the rate of photosynthesis. To do this experiment I am going to set up the apparatus as shown in figure 1. The apparatus I am going to use are the following: - 1 Tripod 1 300ml Beaker 1 Boiling Tube 1 Clamp Stand 1Clamp 1 Boss 1 Ring Binder 1 Lamp 1 1 Metre Ruler 1 Thermometer 1 Stop Clock To do the experiment I will set up the apparatus first. I will firstly place the tripod on top of the base of the clamp stand and fill the 300ml beaker with 250ml of water to create the water bath. I will place the boss in the middle of the bar on the clamp stand and place the clamp in the boss. I would then fill the boiling tube 43ml of water, put the pondweed in it and place it in the clamp. I would place the ring binder around the clamp stand surrounding the water base. Finally, I would plug in the lamp and place it 10cm away from the pondweed. I done a preliminary experiment to get an idea how to do the main and proper experiment and what would happen in the experiment. In the preliminary experiment we didn’t use the safeguards so it wasn’t fair experiment. We did this because it gave us the idea what problems we might face when we did the main experiment and gave us the idea how to do it. The pondweed should create photosynthesis by the following equation: - 6CO2 + 6H2O  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  6C6H12O6+ 6O2 Photosynthesis occurs when plants take in Carbon Dioxide from the surrounding air in its leaves and water from the nearby soil in its roots. The leaves then take light energy from the Sun, which is absorbed in the chlorophyll in the cells and passes it along for it to be used in photosynthesis. Glucose is produced and is converted into Starch to be stored. Oxygen is produced from the water and it is a waste product so it is released into the air. The plant uses Carbon Dioxide and water to create Carbohydrates. Glucose is a small, soluble molecule which is useless for a plant to use as energy but it converts it into Starch, which is a large and insoluble molecule, so it can be stored for to be converted back into Glucose. I made this experiment as fair as possible.

An Unsuitable Job For A Woman: Two Detectives :: essays research papers

While reading, An Unsuitable Job for a Woman, by P.D. James and Indemnity Only, by Sara Paretsky, one is given the opportunity to slip in to the life of a female private detective and experience the aspects of what occurs during the process of a murder investigation as seem through the eyes of two very independent women. P.D. James’s character of Cordelia Gray and Sara Paretsky’s character of V.I. Warshawski are two private investigators that display great passion for their jobs and will stop at nothing in order to close their cases. But, are inexperienced Cordelia Gary and wisecracking Warshawski prime examples of private investigators or are they two naà ¯ve women who have entered an occupation where compassion and sympathy are two traits that are better left unused. Both Cordelia and Warshawski display great ability as women to enter a world of hate, lies and murder and take on roles that traditionally only men dared to enter. But, as they sift though evidence left behind by unknown assailants and pry into the lives of dead and living strangers, are these women really living lives of their own or are they becoming to emotionally entangled in a web of self destruction. Putting their lives in harms way in search of justice, an oath that they as private detectives have never took. Both women are clearly excellent detectives; they solved their cases and reaped the self-gratification that comes from hard work and determination. In spite of that, are these two women really doing themselves any justice by restraining from the certain pleasures in life they yearn to experience and enjoy but have sustained from due to the career choice they have chosen, as seem in Cordelia’s reflection of what her life may have been like if she had chosen to attend an university and Warshawski’s reflection in the park of the mother and her children. Both women are still at an age where these reflections can still become reality, yet they have chosen to continue pursuing a career that hampers their ability to achieve these personal goals. Maybe their becoming to emotionally involved in their cases is a result of their search for a way to compensate for the void their career choice has left in their lives. Both Cordelia and Warshawski became a little too preoccupied with their cases. Cordelia became so involved she was sleeping in the same house in which the murder occurred, not to mention the same bed as the deceased and she even began wearing the clothes of the young man whom she was investigating the murder of.

Casey Anthony Trial

The Casey Anthony Trial One of the most controversial and polemic trials of all times since the OJ Simpson trial was the case of Casey Anthony and the murder of her two year old daughter. All the evidences and witness revealed that she was the main suspect in the murder of her daughter; however in 2011 she was found not guilty of this murder due to several different aspects. This paper will inform and provide the reader with detailed information about this case.In addition the reader will find out what was the outcome of this case and will provide the evidence and will summarize the criminal procedures that occurred from arrest through appeal. The elements of the crime and the evidence which prove that she was guilty will be described. In addition the legal defenses will be identified and how based on the evidence Casey Anthony should have been sentence to life in prison. Caylee Anthony was a two year old girl from Orlando, Florida who was the daughter of Casey Anthony.On July 15, 20 08 Cynthia Anthony who was Caylee’s grandmother and mother of Casey called the Orange County Police Department to report a vehicle that her daughter Casey had stole from her and to also report her missing granddaughter. Cynthia Anthony stated that her daughter Casey had disappeared in her vehicle four weeks ago along with Caylee and had not heard or seen any of them since. Casey Anthony was contacted by police the next day, Casey told detectives that the last time she saw her daughter was on June 9 before dropping her of at a nanny’s house that went by the name of Zenaida Fernandez.Casey stated that she worked as an event planner at Universal Studios and that in the evening of June 9 after getting off work she arrived at the apartment complex where she had left her daughter, once arriving she realized her daughter and the nanny were gone. After several days of investigation, detectives found that almost everything Casey had told them was a lie. First of all the last da y Casey saw her daughter was not on June 9 it was actually June 15 when the whole family went to visit Caylee’s great grandmother in Mount Dora for Father’s Day.Also the whole nanny situation was a lie, after detectives went to the apartment complex where supposable Zenaida Fernandez lived records showed that no one by that name had ever been a resident there. The next lie discovered was Casey’s employment, she was actually unemployed and not working at Universal studios like she stated. Records show that she worked there years back but was fired. Detectives saw no ambition in Casey trying to find her daughter, Casey was a liar and never did she show any type of emotions of suffering while talking to the detectives.The biggest concern to police was â€Å"Why Caylee was reported missing until a month after she was last seen? † Weeks before the call, the vehicle Casey had been driving was found abandoned. The tow truck driver who found the vehicle told offi cers that the vehicle had a smell as if something had been decomposing. The tow truck driver compared the smell to a similar situation where he found an abandoned truck with a dead man’s body laying inside. Along with the horrible smell inside the vehicle; hair and a black plastic bag were found in the trunk of the car.Also found was what it seemed to be blood. On July 16 Casey Anthony was charged with first-degree murder, child neglect, aggravated child abuse and four counts of lying to detectives. On December 11, 2008 Caylee’s body was found wrapped inside a plastic bag, her body was decomposed and her skull only held a few hairs. The skull had duct tape wrapped around it which was a form to test for DNA; after the DNA testing was examined it did not match Casey’s DNA.Charges were overturned although Casey still had to serve some time for a previous crime she had committed which had to do with check frauds. Social media played a big role in the defense strateg ies for the Casey Anthony trial, and the defense had to tweak their defense around that. The Internet has been a tool for attorneys to gauge what people are thinking about many things, such as books, movies, TV shows, and such social information has been used in jury selections.A consultant for Casey Anthony’s attorneys analyzed more than 40,000 negative and positive highly-charged opinions on social media sites and blogs and used them to help the defense form their trial strategy (â€Å"Defense Strategy In Casey Anthony Trial Of The Century: Tweaking Social Media Tactics†, 2012). Using this defense of strategy entails that the defense attorneys are going to go above and beyond to defend their client. They are using a method that has not been seen in law. By going on these web-sites and all the different social networks available, they are going to get the worlds opinion on things.Using these tools really helped them defend Casey Anthony defense finding new leads and o ther people that may need questioning. The day after the prosecution rested in the Casey Anthony murder trial, the defense came out swinging, attacking crime lab procedures to try and discredit one of the most potentially damning pieces of evidence: duct tape found on the skull of her daughter, Caylee. During the first day to present his side of the case, Anthony’s defense lawyer Jose Baez doubled down on the duct tape, calling FBI technician Heather Seubert to the stand.Seubert, who examined the tape at the FBI lab, testified that there was DNA on the tape, but that it didn’t match Casey or even the victim, Caylee. The only DNA on the duct tape belongs to a forensic examiner who conducted some of the analysis (â€Å"Defense Opens, Attacks Forensic Evidence In Casey Anthony Trial Read More: Http://newsfeed. time. com/2011/06/16/defense-Opens-Attacks-Forensic-Evidence-In-Casey-Anthony-Trial†, 2011). This piece of evidence was crucial for the defense. There was no matching DNA on the tape that lead the Casey Anthony to the death of her baby.Even though the verdict was not the one that the American people wanted to hear. I feel that this evidence lead to the not guilty verdict given by the jury. All the other evidence might lead to a guilty verdict, but once that was brought up I truly feel that is what made the jury come to their decision. Casey Anthony was first arrested on July 16, 2008, and was charged the following day with giving false statements, neglect of a child, and obstruction of a criminal investigation (Harris, 2012). Casey Anthony had been released in August 21, 2008 following Casey's Bail Bond had been posted.Casey Anthony had been presented a restricted immunity offer through prosecutors up to the point of September 2, 2008 however would not accept it. The Orange County grand jury indicted Casey Anthony on a total of seven counts: First-degree murder, aggravated child abuse, aggravated manslaughter and four counts of false st atements to law enforcement(Cox Media Group, 2012). Casey Anthony gave false information so frequently to family members and also the authorities about the location concerning her child.While her child went missing throughout the very initial thirty day period Casey Anthony carried on to be out there hanging out with acquaintances and Casey additionally proceeded to receive a tattoo on Casey's backside of â€Å"Bella Vita† which clarifies to beautiful life in Italian. Casey conduct had not been behaving such as a worried mom searching for her own absent child. The majority of the forensic evidence focuses about Casey Anthony’s vehicle, for instance a hair along with discoloration based in the trunk area, collections of chloroform and also chloroform had