Economic inequality Essay

According to Douglass Massey, what makes America so exceptional? Explain globalization’s effects on inequality in the United States. According to Douglass Massey, what makes America so exceptional is â€Å"among developed nations for the amount of inequality it tolerates† (Massey 22). Globalization happens all around the world but, only in the United States inequality is getting out of hand. Globalization’s effects on inequality in United States is after the end of the New Deal coalition the rich got richer and the poor got poorer. The new realignment favored the rich in the expense of middle and lower classes. The poor was taxed more and the rich were taxed less. Tarry Hum’s article (â€Å"Persistent Polarization..†) provides a profile of the city’s current labor force. What does Hum mean by â€Å"persistent polarization†? Compare per capita income and rates of unemployment among different racial and ethnic groups in New York City. – In Tarry Hum’s article â€Å"Persistent Polarization† means the large gap of employment in terms of race, gender, and nativity. For instance, language, proficiency, and education. In terms of race, African Americans, Latinos, and Asians (minorities) were making up 70-75% of the workforce. I’m not really understanding the second part of the question but, I’ll take a go at it. – According to the data, Immigrants aren’t happy about their working condition and wages. The data shows that immigrants works most insecure jobs such as construction and transportation. Some of these jobs are also very high risk yet they get paid below average wages. Does Katherine Newman (author of â€Å"Working Lives†) subscribe to the â€Å"poverty as pathology† idea that people are poor because they are lazy/have no work ethic/don’t try to get a job? Support your answer with evidence from her article. Katherine Newman thinks that if people work hard they should be rewarded. This also doesn’t mean that people in poverty deserves their low standard of living. This means if you work hard you should be rewarded and if you don’t you don’t deserve anything from the goverment. Individuals that lacks work ethics should not be compensated by the states. Not only do they not deserve it they didn’t even try. She thinks that personal failure they are resistaing the econmic and social program. An individual, if you’re not smart and poor and whatever it means it only mean you’re failing yourself and not because the states didn’t do anything for you.

FastFit Case Analysis Essay

1. 1. Mark the main flows of goods and money in the diagram (above) and employ a key or table of descriptive elements to explain your answer. 1. HQ contacts the supplier and tells them how much of each product the company needs. 2. The supplier sends the goods to the FastFit warehouse. 3. The warehouse notifies HQ about receiving the goods and how much of each product is in storage. 4. HQ tells the warehouse, which stores to send the products to, how much product each store needs and when the store needs the products. 5. The warehouse sends the proper amount of each good to the FastFit stores. 6. Customers come into the FastFit stores and pay money to purchase the products. 7. Store sells the customer the merchandise, receives money and personal information about the customer and sends the happy customer home with their purchase. 8. Store sends money and customer information to HQ. Store also sends information about what products have been successful and which products are not selling. 9. HQ tells suppliers which goods are going to be re-ordered. Also HQ pays for the goods that the supplier has supplied. 10. HQ tells store managers how to set up and run the FastFit stores to enable the highest level of success. 11. Supplier sends information about the goods that have been shipped to the warehouse and how much money is owed for the goods. 2. a) List the specific items of information that are usually gathered at the POS (Point of Sale terminal or cash register) and recorded when a customer checks out (excluding obtaining the identity of the customer which is covered in Q3)? b) What are three important uses of this information at the store by the store manager and by management at the headquarters– a total of six uses? (use a table) (It is important that you give different responses/uses for store manager and the HQ) Transactional Information – POS Transaction ID – Payment Type (credit/debit) – Date of Sale – Time of Sale – Amount Paid – Amount Due – Store Details (Name, Location, Branch) – Promotion/ Discount (if any) Product Information – Type of Product (Clothing/Accessory) – Product ID – Size of the Product – Product Brand – Price of the Product – Quantity of Product Staff Information – Which employee sold the product to the customer – Comparison on employee success Store Information – Sales Promotions Occurring – How long the product has been in the store – How many of the same products remain in store – How popular the product has been Use of Information by Store Managers: Information Elements Needed Description of the use – Which Employee sold the product to the customer – Quantity of items sold to the customer – Date and Time of the transaction – Total Amount of money the customer paid – Managers can see which employees have been selling the most. They can identify which employees have not been selling as much. They can provide incentives to encourage employees to get more sales – Type of Product – Product Brand – Quantity of Product – Size of Product – Managers can see which products are most popular in the store. Can implement new structures to display products in a desirable manner. Can tell employees which products to heavily advertise to customers. Can keep store stocked appropriately based on which items are most popular. – Amount Paid – Date of Sale – Time of Sale – Managers can see how much money the store is making on a daily, weekly and monthly basis. If sales are slow during certain periods, management might make a decision to lay off some employees. If sales are strong, management might need to hire more employees. Use of Information by Management at Headquarters: Information Elements Needed Description of Use – Size of Product – Product Brand -Type of Product – Quantity of Product sold – Sales Management can assess the information and understand which brands are popular in which store locations. Knowing the popular brands they can contact the suppliers to replenish goods, and try implementing similar brands to certain store locations. – Amount Paid – Time of sale – Date of sale – Store details – Payment Type Income Management can look at financial success in each store. If some stores are more successful than others, they can move store managers around to try implement the successful tactics everywhere. Can also implement certain payment techniques if a credit card brand is popular at a specific store – Promotions – Type of Product – Product Brand – Size of Product – Quantity of Product Marketing Management can see which products are the most popular in each store. Can create advertisements that are catered to each individual store location. Can create new store layouts to promote the popular items in store and draw customers in. 3. a) What are some ways to obtain the identity of the customer at the POS and to associate this â€Å"identity† with more detailed information about the customer? b) What business actions could FastFit then take based upon this additional information? Obtaining Customer Identity Associate this Identity with more detailed information Actions based on Information Gathered Have the customer sign up for a FastFit customer card Customer created personal ID that gives the store information on all the customers’ purchases. Store will know what items are desirable to the customer and when they make the most purchases. FastFit can use this information to give the customer promotions towards their favorite items in the form of coupons and promotional emails. Also the store can email customer more information about their favorite brands, and suggestions of similar products the customer might like. Credit Card Information The customer’s credit card gives personal information on where the customer lives and what purchases they have made in the store. The store can put up more focused advertisements in the locations where their customers live. Ask Customers to fill out a survey Survey will gain information about how customers feel about the store and FastFit’s products. They can see if customers feel like the store has issues, and what people feel needs to be addressed with the overall company. They can recognize certain issues and address them directly. These might include changing the overall store atmosphere or the quality of products inside. If customers like a certain aspect of the store, FastFit can emphasize this. Maybe try and have a more diversified product mix or different advertising routine. 4. Assume HQ is responsible (HQ issues orders to suppliers and determines what warehouse should deliver to stores) for replenishing inventory at the stores. a) What information (elements) are needed and how are these used to decide what (the warehouse) sends to each store? b) Where do the information elements come from? (use a table to combine the responses for a and b). c) List two reasons why we didn’t have each store decide what (replenishments) to order from the warehouse? Headquarters Responsibilities Information Elements Needed Source of Information Product Information: – Type of Product (Clothing/Accessory) – Product ID – Sizes of the Product – Product Brand – Price of each Individual Product – Quantity of Product needed Computer checkout system takes all of this information, as products are being purchased and returned in the store. Transaction Information: – Date of Sale – Time of Sale – Amount Paid – Amount Due – Types of Products being sold at the time Computer checkout system in store takes in this information about how much was spent at the store and at which times the most spending occurs. Also managers can see tell when the busiest times of the day, month and year are just by observing customer patterns in the store. Customer Information: – Ages of customers coming into the store – Which gender (male/female) shops most frequently at the store – Which products the customers are purchasing the most – Where does the customer base live – When do the customers purchase the most merchandise Customer database formed by customers that are part of the FastFit customer card club. The personal ID gives info about customers past purchases and their preferences toward certain products. Surveys customers filled out which explains age, gender and store and product preferences. Computer checkout system also records customer purchases to see what people like and how often they visit the store. Store Information: – Sales Promotions occurring – How long the product has been in the store – How many of the same product remain in store – How popular products have been Inventory tracking database in each store keeps track of which items have not been sold. Store management and employees keep track of trends and promotional deals going on within the stores. They can also visually observe which items have been around for longer, and which items have been selling out very quickly. c. Management at HQ controls the replenishments because they can oversee all operations across all of the stores. They have the power to make calculated decision about each store that would benefit the company as a whole. If each store were to replenish the products themselves, they would only replenish what is popular at each time. HQ ensures that each store is receiving the goods that will properly sell in the location that the store is in. HQ can analyze trends on a larger scale, and implement advertising strategies and product mix based on the data trends. If replenishing were left to the individual stores, sales and profit would be lost. 5. a) Draw a system diagram that shows the key information and product flows between FastFit (HQ and Warehouse) and a supplier, including the steps for ordering and invoicing and label each flow descriptively. This diagram will have three circles. b) Compare your drawing with the diagram showing the flows that occur when a customer buys something at a (physical) store and explain why the former is more complicated. 1. HQ decides what needs to go into stores and orders the products from suppliers 2. Supplier sends HQ a confirmation of the order and also sends an invoice for how much money is owed 3. Supplier sends the merchandise to the warehouse 4. HQ pays the supplier for the products 5. HQ contacts the warehouse and confirms that the products have been shipped and accounted for in the warehouse 6. The warehouse sends an invoice slip to HQ for holding the products and sending them out as necessary 7. HQ pays the warehouse the correct amount on invoice slip 1. Customer goes into store and selects an item/items to purchase 2. Store receives money from customer for the purchased product 3. Store records information and sends the info to HQ b. The diagram above shown in the first part of problem 5 is more sophisticated than the latter diagram because it involves many more transactions. HQ must go through a careful decision process even before  ordering the products from the supplier. After ordering the correct items, HQ must ensure that the merchandise reaches the warehouse, and then the store without any issues occurring in between. This entails that HQ pays the supplier and warehouse in time. HQ has to deal with all of the physical decision making as well as financial details of each transaction. HQ pulls each element together. 6. Assume that FastFit headquarters receives and pays invoices from suppliers. a) How do they decide whether (i.e. which information elements does the HQ use) to pay and how much to pay? b) From where do they get the information to make this decision? (use a table to combine responses to a and b). Headquarters Decision Making: Information Elements Needed Source of Information/ Decision Pricing Information: – Product ID – Amount of Products being bought – Price of each different product – Amount of products being bought each season. – Which products FastFit wants to sell and (in the future) which products the customers have shown interest in. Supplier would provide the price of each product. Decision: HQ and supplier would agree on a set price based on how much of the product FastFit would be purchasing. FastFit would want to choose and continue doing business with the supplier based on what the customers have shown interest in Warehouse Information: – Warehouse checks to see that complete order has arrived – Checks for quality of products – Checks to ensure that the correct order has arrives – Records the information about received inventory Warehouse would provide the information about the order. Decision: HQ would pay the warehouse when the information gets relayed that the order was complete and correct. Warehouse and HQ would decide on a set price beforehand for each transaction that the warehouse performs. Delivery Information: – Date and time products are needed by – How quick the delivery takes place – Location of stores from warehouse – Location Supplier would set a price for the delivery of products to the warehouse. Warehouse would set a price for the delivery of products to the stores. Decision: HQ would potentially try and negotiate the price for deliveries with the warehouse and supplier. If the delivery services proved to be reliable HQ would feel satisfied with the price and process. Supplier Information: – Where the supplier is located – Reliability of supplier – How quick the supplier can get the product to the warehouse Supplier provides information about their processes and how much they charge for the products. Decision: HQ would pay the supplier based on how much product they are ordering and if the suppliers asking price is reasonable.

Marry Shellys Frankenstein Essay

In the story there are obvious sections, there are a few reasons for this. As you read the book you realize that the story is subdivided. There are different forms of narrative in the story. This varies from letterform at the start of the story, different narrators and letters sent to people in the story. In Frankenstein there are three different narrators, these are the monster, Victor Frankenstein and Robert Walton. The narrative set up is rather like an onion. This is because you have the main narrator, the monster, in the middle then Victor and then finally on the outside Walton. Robert Walton would have been seen as a Romantic hero because of his rebellious ways. Mary Shelly choose Robert Walton’s character because she wants him to be a rebel, which also links him to Victor Frankenstein as victor is a rebel as well. Mary Shelly links Robert Walton to Romantics. Firstly Romantics have interest in nature, rather like Robert Walton who is going on a voyage to the North Pole. Also Romantics rebelled against social rules. Robert Walton is rebelling against what Shelley calls the rules of nature as he goes on an expedition to the undiscovered. There are many Romantic heroes from various books like Odysseus from The Odyssey. But there are also other rebellious heroes many of who are from myths and legends. One of the main rebellious heroes was Prometheus who gave fire to man against Zeus’ will and was punished for it. Shelly presents Robert Walton as a rebel, rather like Victor Frankenstein. We no that Robert Walton is a rebel firstly because he rebels against the limitations of knowledge, he is going to the North Pole. He says, â€Å"I shall satiate my ardent curiosity with the sight of a part of the world never before visited. † This means that he wants satisfy his need for knowledge by searching the ‘unknown’ world. We also know he is a rebel as his father forbids him to go on a voyage, which he is doing. Also we see that he doesn’t desire luxuries or an easy life, he says â€Å"My life might have been passed in ease and luxury, but I preferred glory to every enticement that wealth placed in my path. † This also shows that he will go a long way for glory and that he would much prefer glory than luxury and ease. Victor Frankenstein is seen as an amazing being through Robert Walton’s eyes through their time together. Shelly describes Frankenstein through the eyes of Robert Walton as a â€Å"Divine wanderer†. Also Walton Says that he is, â€Å"so gentle, yet so wise†. From Shelly’s choice of words we can see that Robert Walton sees Victor Frankenstein as a person with superhuman qualities. Therefore throughout Robert Walton’s letter we can see that Robert Walton looks up to Victor Frankenstein as a rebellious hero and as an amazing being. Structurally, Shelly’s opening to the novel is quiet strange. At the start of the novel you have Robert Walton’s letters and then Shelly follows the letters with Victors personal story. I believe that the way Shelley has opened the novel may be strange but it is effective trough out the sequence. By using different narratives Shelly encourages the reader to compare and contrast the viewpoints of Victor Frankenstein and Robert Walton. From Chapter one Mary Shelly proceeds to create the character of Victor Frankenstein through his own narrative. Interestingly, she reveals that like the first narrator, Robert Walton, Victor Frankenstein has had the desire to reach new depths of scientific research since he was a child. Mary Shelly shows the reader the parallels between the two narrators, Robert Walton and Victor Frankenstein. Firstly the reader can see that Frankenstein and Walton are alike, as they both want to rebel against the limitation of knowledge. The reader knows this as Walton wants to find new undiscovered things by going to the North Pole and Frankenstein wants to create life. Also the reader can see that the two of the narrators are alike as they both rebel against their father. Finally the reader can see the similarities in the characters as they both say that they have had the desire to reach new depths of scientific research since they where children. Luke Garner 10Pd English Literature Mr Dorefeyev Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Mary Shelley section.

Parent Involvement in schools Research Paper Example | Topics and Well Written Essays - 500 words

Parent Involvement in schools - Research Paper Example It is because of this that children whose parent participates actively in their children’s education have a high level of academic achievement due to this motivation (Hornby and Lafaele, 2011). In addition, parental involvement should be encouraged due to its impact on the working relationships found in schools, especially between and amongst different school parties. With this in mind, parents get an opportunity to improve the socialization skills of their children with their teachers and other members of staff, as well as amongst themselves, which is crucial for academic networking. Parental involvement therefore should be active as it also boosts the morale of teachers in imparting education on children, as teachers perceive the interest of parents as motivation to have their children moulded into responsible citizens and members of society, where the teacher is the key. School responsibilities in ensuring parental participation lies in different factors that entail both the school’s interests and those of the parent, as well as those of the child (Sitton, n.d). It is because of this that the school has the largest responsibility in ensuring that parental cooperation and involvement in a child’s education in that schools spend large amounts of time with children. Putting this into perspective means that schools should put in more effort in drawing the parents to the school to understand that which their children go through in learning. In addition to this, teachers in in spending more time with children should know the interest of the children, which is information to be shared with parents for the best interests of children. This makes the school the guardian of the children, where it is up to the school to come with strategies to meet the parent and create forums in which to foster a healthy relationship between

Business Communications Essay Example | Topics and Well Written Essays - 500 words

Business Communications - Essay Example Nonverbally, smiles, head nods, focused eye contact, and facial expressiveness work well (Knapp and Vangelisti 2004). It is possible to say that nonverbal communication is more important to American audience because of cultural and social diversity. All cultures and nations have different behavior patterns and communication patterns which influence their perception of the information and interpretation of the environment. Non-verbal communication can be interpreted differently by different cultural and religious groups (Gesteland, 1999). First, the vast majority of nonverbal behaviors is intuitive and is based on normative rules. Except for behaviors such as good manners or etiquette, little formal training is provided for nonverbal communication. For instance, eye contact may indicate a liking for the other person. It also serves as simultaneous communication because eye contact allows people to send and receive messages at the same time (Knapp and Vangelisti 2004). According to cultural traditions, Muslim women avoid direct eye contact while Europeans interpret this behavior as impolite and suspi cious. In Japan and China, status and power are shown by eye contact. In meetings, organizational members with the most power will be looked at more often.

Birthright Citizenship Research Paper Example | Topics and Well Written Essays - 1250 words

Birthright Citizenship - Research Paper Example The current interpretation was intended to reflect the population policy of the state. In the initial years of the American nation, there was inadequate work force to power development in the country. Therefore, the government adopted an approach that increased the chances of becoming American citizens. In those times, there were no requirements. In fact, even the property ownership principles were different. For example, due to the perception that America was virtually empty, the original settlers just camped on the site and then obtained the necessary paperwork. These laws have since changed to reflect the changing times. While all people who landed in America had a choice to stay and automatically become citizens, immigration laws have limited acquisition of citizenship (Lacey par 5). The only remaining aspect is birthright citizenship. There are propositions that there are better models of granting citizenship to people who live in the United States. For example, before a person is granted birthright citizenship, their parents, or at least one of them, would be required to be an American citizen. In this way, all children born to alien parents have to acquire citizenship in other ways. In this way, the issue of mothers timing their deliveries to coincide with visits to the country would no longer be a problem. At this point, it is relevant to understand the motivation behind strict control of immigration. Over the years, the American population has grown rapidly. This growth was fuelled by immigration, especially from Europe. However, the current population is exceeding the ability of the countries resources. For example, there are people who blame the presence of immigrant in the country for the poor wage structures and thus for reduced standards of living. There are many flaws to this model, but for this paper, it will be adopted because it is influential to the population policies adopted by the

Quality Management Organizations Research Paper Example | Topics and Well Written Essays - 750 words

Quality Management Organizations - Research Paper Example Quality management ensures that organizations produce high quality products. Quality management in an organization has four main components. The components are quality control, quality assurance, quality planning and quality improvement. Also ix sigma is an important part of quality management (Foster, 2007, p.24). Therefore quality management is not only focused in enhancing the quality of products and services of the organization but also provides the way by which it can be achieved. In order to ensure consistency in the quality of products, it makes use of quality control and quality assurance of the production process. The study will shed light on the importance of quality management in an organization. In this context two companies have been chosen to depict the significance of quality management. The organizations have been chosen according to their total area of operations. The companies are Walmart and Walgreens Store. Now Walmart has been chosen for its national operations, while Walgreens Store has been selected for its local operation. Walmart Stores Inc., popularly known as Walmart is a company which runs warehouse stores and departmental stores. Quality management has always been an important function in the company. Wallmart gets heavily benefitted by implementing various quality management systems. Some of the strategies that Walmart uses to ensure qualities are as follows:- Short flow time: - Walmart uses very short flow time of their products. They alter or recycle their unsold products within a short span of time. This ensures that the company sells quality and fresh products to the customers. Low Inventory Level: - The Company maintains a very low inventory level in order to reduce the level of stored items. This low inventory level assists the company to provide good quality products as well as helps in reducing inventory cost. Walgreen Co. is popularly known as WAGS. As of 2012,

Fantastic Voyage Term Paper Example | Topics and Well Written Essays - 1000 words

Fantastic Voyage - Term Paper Example Finally we will describe the exchange of oxygen with the delicate alveolar and the pathway used in inspiration and expiration. Body The femoral vein travels from the inside of the right leg, parallel to the femoral artery, upwards towards the center of the body. The femoral vein is a larger vein which receives blood from the popliteal, the great saphenous vein and the femoris (Femoral†¦). The femoral vein first comes into the external iliac vein and from there flows into the common iliac vein and into the inferior vena cava. The iliac veins form the common iliac at the small of the back around the fifth lumbar vertebra. It is the function of the vena cava to carry blood from the lower portion of the body directly to the heart (Inferior†¦). The vena cava empties into the right atrium, the lower right back side of the heart. The blood arrives into the right atrium un-oxygenated and is a darker color due to the lack of oxygen. The vena cava are the two largest veins in the bod y and the inferior runs alongside and behind the abdominal cavity and where the vena cava meets the right atrium is a valve known as the Eustachian valve. Though the Eustachian valve remains its primary functions are in the developing fetus, where it helps to direct blood flow through the foramen ovale into the left atrium. Once breathing begins this is no longer necessary and the foramen ovale closes and the amount of blood flow between the left and right atrium is limited. The vena cava are responsible for collecting blood from lumbar veins, hepatic veins, gonadal veins, renal veins and the phrenic veins (Cardiovascular†¦). All of this blood is un-oxygenated. Blood then flows through the tricuspid valve and is pumped into the right ventricle. Cardiac muscle provides rhythmic regular contractions to keep the blood flowing smoothly. After passing through the pulmonary valve the blood enters the pulmonary trunk (Right†¦). The contraction of the myocardium causes pressure wh ich forces the blood into the pulmonary truck where there is a left and right division. The trunk has a pulmonary semilunar valve that opens during contraction and closes when the muscle relaxes, thus preventing the blood from flowing back into the ventricular chamber. The right pulmonary artery carries the blood to the lower right lung. Within the right lower lung there are three lobes whereas the left lung has two lobes. Structures within the right lung include lateral, anterior, posterior, dorsal and medial bronchus (Chest†¦). A bronchial tree contains these bronchus and alveoli on these branches resemble grapes. Alveoli are thin membrane air sacs within the lung and the bronchial tree is the passage way through which air is passed in inspiration and expiration. Surfactants within the alveoli keep them from collapsing during exhalation and they remain slightly open. Without this surfactant the thin sacs would close in and stick to each other as air passes in and out of them and they inflate and deflate. The passageways into the lungs are lined with epithelia and cilia whose primary function is to move debris and foreign particles from out of the lungs. These provide the first line of defense within the lungs. Dendritic cells are scattered throughout the lungs and increase when there is an inflammatory response. These cells are antigen presenting cells that contain lysosomes and endosomes with three separate functions; antigen presentation and activation of T cells, inducing and maintaining immune tolerance, and maintaining immune memory with B cells (Wieder). These dendritic cells are the only cell that is able to activate naive T cells and lay dormant until there are pathogens or

Research paper on emily dickinson with some analysis of her work Essay

Research paper on emily dickinson with some analysis of her work - Essay Example Her poems were marked by very close descriptions of inspirational moments, and moments of happiness. Most of here poems centered around ideas of death and immortality. Her works received severe criticism in the late 19th and early 20th century, but she is now considered as a major American poet by most (Bloom, 9). Before 1861: Only five poems have been dated to be written before 1858 (Pickard, 20). These are more conventional in nature than her later works, and are based on subjects like valentines, her feared of loss of friendship, her missing of her brother. Dickinson’s work showcases her artistic prowess and is centered around a variety of themes. She is often regarded as a transcendentalist as she was deeply inspired by works of Emerson. Her poems had a very intelligent usage of humor, sarcasm, irony, and satire (Wolff, 171). Some of the major themes that can be seen her works include: Morbidity: This theme of her characterized by her interest with topics like illness, dying and death. Her poems describe death by many methods: drowning, hanging, suffocation, premature burial, stabbing and so on. Her sharpest work came in the form of â€Å"death blow from the GOD† and â€Å"funeral in the brain†. These works reflect the starving characteristic of her personality. Her most complex work is based on the principle of death of self because of the loss of hunger for life. Flowers and gardens: Poems written in the early period of her life were characterized by an intelligent blending of her poetry with a bouquet. Farr (1-7) notes that she associates some flowers like the gentians and anemones to youth and humility; while others with prudence and insight. Examples of such work by her include: "My nosegays are for Captives –  / Dim – long expectant eyes –  / Fingers denied the plucking,  / Patient till Paradise –  / To such, if they shd

Final Paper African Americans Essay Example for Free

Final Paper African Americans Essay Through out history there has been a struggle for African Americans to be accepted in our society. An African American endures many more disadvantages than most white people. The media and other sources have made blacks to look the same and has portrayed them in a certain light that may not be fitting to all blacks. There are many misconceptions that people have of blacks. Many people and organizations have had a part in bringing equality and fighting for equal rights for black people. African Americans have been at a huge disadvantage in America from the beginning. Unlike many other minority groups in America, African Americans in many cases were brought here by force and not by there own will. (000000) The first African Americans came to America in the seventeenth century and were immediately forced to work for Whites. After much turmoil and even a civil war Blacks were finally given there freedom with the Emancipation proclamation signed and ratified in 1863. Even after the proclamation some blacks were still enslaved and freed blacks had little to no opportunity. The struggle continued into the next century as blacks finally received the right to vote with the ratification in of the 15th amendment. The 20th century contained a world filled by a segregated America between whites and blacks through jim crow laws that existed that restricted blacks from interacting with whites. With a history like that it is no wonder that African Americans still have disadvantages in our modern day. America today is known as the country of opportunity. Although there are many opportunities out there it seems that there are more opportunities for some groups more than others. Many companies and corporations still use race as a indicator for hiring employees. In one study done by the National Bureau of Economic Research, people with common black names were less likely to be called back for an interview based on there application alone then black people with common white sounding names. Job applicants with white sounding names needed to send out ten applications to get one call back while applications with common black names needed to send out about fifteen to get one reply. (Francis, www. nber. org/digest.com). The research was done withe resumes of the same qualifications. It is easy to see that Black people are constantly bombarded by inequality in the work force. If there were inequalities just based on names of applicants just imagine the inequality when employers actually see the race of the applicants. Black Americans have been stereotyped for years and continue to be today. The media is one great source of portraying African Americans in certain roles. African Americans are portrayed as criminals, drug dealers and sex offenders in many instances. Many Africans are outraged at how they are portrayed in the media. Protest groups such as the Young African Americans Against Media Stereotypes have done what they can to show there stance on stereotypical media portrayal. Majority of the time you see a young African-American male in the media he is singing, rapping, scoring a touchdown, dunking a basketball or committing a crime( http://www. yaaams. com/) Many stereotypes about black people are incredibly false. Many people still think that black people are only good at certain things like music and sports. This is a very false belief and black people have contributed heavily to all different sorts of fields. Many vital inventions that we use on an everyday bases were invented by black people. The dust mop, pencil sharpener, typewriter, and elevator were all invented by black people. (http://www. black-network. com) Our society would not be what it is if it were not for Garret Morgan, the young Black man who invented the traffic light. http://www. infoplease. com/spot/bhmcensus1. html.

Effect Of Substrates On The Respiration Of Yeast Biology Essay

Effect Of Substrates On The Respiration Of Yeast Biology Essay The aim of this investigation is to examine what effects different substrates have on the respiration of yeast. I will investigate this by measuring the amount of carbon dioxide evolved during anaerobic respiration. Pilot Experiment: Before we could test which carbohydrate and type of yeast produced more carbon dioxide, we had to standardise the other variables of this experiment; temperature and concentration. Therefore, in order to find the optimum conditions we carried out a pilot experiment. In this experiment we used a range of temperatures from 10ËÅ ¡ to 60ËÅ ¡C and three different concentrations of carbohydrate 1%, 5% and 10%. The experiment was carried out as a group experiment with everyone being allocated a different temperature and concentration to test. It was carried out over a standardised period of 5 minutes. The rationale for conducting this pilot experiment was that enzymes are biological catalysts that are made up of globular proteins which are activated to work by temperature. They exist in the yeast and our bodies and therefore work best at 40ËÅ ¡C, however, they denature soon after and so our body temperature is kept at 37ËÅ ¡C to ensure this does not happen. Denaturation is the irreversible loss of 3D structure of enzymes and can be caused by excess heat or a change in PH. According to the Collision theory however, in order for a reaction to take place a certain level of energy, called the activation energy, must be reached. This energy needs to be reached by the particles colliding in the right way and fast enough, so a reaction can take place. By giving the particles more energy it encourages more to collide therefore the activation energy can be reached and a reaction can happen. The kinetic theory explains the effect of temperature, volume and pressure on the number of collisions. The theory states that if temperature is increased the particles gain more energy and there are more collisions in a given time. Similarly, increasing the concentration means than there is a higher chance of a collision happening because there are more particles in a given volume. If the concentration of carbohydrate/yeast is increased there are more enzymes known as z ymase, produced. This means there are more active sites for the carbohydrate substrate to attach to and the reaction happens faster. Therefore a balance must be reached between temperature so it does not denature the enzymes but is high enough to activate a reaction. Also, having a highly concentrated solution is seemingly advantageous but this can cause osmotic problems, so another balance must be reached, as to avoid this problem, but not to discourage a reaction. Apparatus: Beehive shelf Clamp Stand 50ml conical flask Trough Clamp Thermometer 50cm3 measuring cylinder Heat proof mat Spill 500ml beaker Bunsen burner Delivery tube with bung Tripod Gauze Stopwatch 25cm3 of bakers yeast 25cm3 of sucrose Electronic water-bath Method: 25cm3 of bakers yeast and 25 cm3 of sucrose was mixed together and preheated at the required temperature for 15 minutes in an electronic water-bath. 400cm3 of water was preheated to the same temperature as the yeast using the Bunsen burner. The trough was filled with water and a measuring cylinder was inverted by filling it with water then pressing a piece of paper onto the top to prevent any air bubbles from getting in. The beehive shelf was placed in the centre of the trough and the measuring cylinder was clamped in place, with the top resting on the beehive shelf, the hole being directly under it. The yeast was placed in the preheated water-bath and the bung from the delivery tube was replaced. The delivery tube was inserted into the hole in the side of the beehive shelf and the stop watch was started. Thirty seconds was timed then the beaker with the yeast/carbohydrate mix was swirled for 5 seconds to mix the yeast/carbohydrate. This was repeated every thirty seconds for fifteen minutes, with readings being taken at three five minute intervals. The correct temperature in the water bath was maintained by adding more hot water to it throughout the experiment. BACKGROUND INFORMATION: YEAST Saccharomyces cerevisiae, also known as yeast, is a micro organism that uses saprophytic digestion to break down substrates. This is achieved through releasing specific enzymes to break down specific substrates, but if yeast does not contain a certain types of enzyme then it cannot break down its substrate. The more the enzyme of a particular substrate, the faster the rate of breakdown and therefore the more CO2 is produced. This will help me to test how much CO2 each substrate produces. Yeast can also respire aerobically and anerobically depending on the availability of O2. If there is plentiful of O2 then yeast would respire aerobically with sugars, producing H2O and CO2 as waste products. However, if no oxygen is available then the fermentation would occur which converts sugars into CO2 and ethanol. RESPIRATION Respiration is the process by which energy is released energy from glucose in the presence of Oxygen, forming carbon dioxide and water as waste products. Glucose releases energy in a series of reactions that take place inside components of the cell. The stages are briefly explained below: GLYCOLYSIS To get the sugar in a more reactive form it is produced to fructose-1,6-bisphosphate by the addition 2 phosphate molecules. This process is a phosphorylation reaction. The fructose-1,6-bisphosphate is then broken down into 2 molecules of glyceraldehydes-3-phosphate, which comprises of 3C each. The glyceraldehydes-3-phosphate converted into pyruvate via the oxidation process where each GAL3P molecule releases 2 hydrogen ions and 2 electrons. The electrons are then transferred to NAD to produce NADH (reduced NAD) and the energy is used to produce 4ATP from 4ADP and 4Pi. Finally there is a net yield of 2 molecules of ATP, and 2 molecules of pyruvate which is used in the link reaction and 2 molecules of reduced NAD which carries on to the link reaction. LINK REACTION In the link reaction the 2 molecules of pyruvate leave the cytoplasm of the cell and enter the mitochondrial matrix. This is an oxidation reaction where 2 NAD molecules oxidise 2 pyruvate molecules into 2 acid molecules. These 2 molecules of acetic acid then go on to combine with 2 coenzyme-A molecules to form Acetyl Co enzyme A. in the end of this stage 2 molecules of reduced NAD form, 2 molecules of CO2 is lost and most importantly, Acetyl Co enzyme A is formed through the conversion of pyruvate. This is then used in the next stage of respiration. KREBS CYCLE At the start Acetyl Coenzyme A , combines with Citrate Synthase an enzyme as well and a 4 carbon molecule called oxaloacetate, forming Citrate. Then, Citrate goes through the process of oxidative decarboxylation which forms a 5 carbon molecule called oxoglutarate.at this point NADH is produced and CO2 is removed. In the latter stages of the krebs cycle, the oxoglutarate is changed into a 4 carbon oxaloacetate molecule. NADH is made and 1 molecule ATP is also made. The volume of CO2 that is produced in the krebs cycle is important as this is the dependant variable. ELECTRON TRANSPORT CHAIN In this stage all of the NADH and FADH that has been produced in the previous stages is converted into ATP. This takes place in the cristae of the mitochondria. The NADH and FADH electrons move. When the electrons pass from one carrier to another, a series of reduction and oxidation reactions take place which releases energy in the process. This energy is used to pump H+ ions from the matrix into the intermembrane space, thus creating a gradient where the concentration of the H+ ions in the intermembranal space is higher than it s in the matrix. The inner membrane contains enzymes called ATP Synthase and The H+ ions diffuse through these enzymes causing energy to be released which is used to synthesise ATP through phosphorylation. The process is called because the final terminal electron acceptor is oxygen which picks up the electrons from the chain and the H+ ion from the matrix to form H20 as a waste product. This reaction is catalysed by the enzyme Cytochrome Oxidase For every NADH which enters the chain and is oxidised by NADH dehydrogenase, 3 ATP are produced. For each FADH that enters the chain, 2 molecules of ATP are made. ENZYMES Enzymes are proteins that can effectively increase the rate of a reaction by lowering the required energy (activation energy) needed in order for the reaction to occur. Enzymes have a tertiary structure which decides the shape of the active site. The substrate must be specific to the active site because if they were not complementary to each other, then the substrate can no longer bind to the active site, thus the enzyme substrate complex does not form. The performance of enzymes can be affected in several ways some of which I have explained below. TEMPERATURE An increase in temperature will cause an increase in the rate of reaction because both the enzyme particles and substrate particles have gained kinetic energy. This will result in the particles to move faster, thus increasing collision frequency and the numbers of successful collisions as the particles have the required activation energy. If the temperature rises above the optimum temperature then the enzymes can become denatured. This happens because the enzyme molecule vibrates more causing the weak hydrogen bonds (holding the 3D structure of the enzyme together) to break. This eventually leads to the shape of the active site being altered. Consequently, the substrate will not be able to bind with the substrate as the shape of the active site is no longer complementary so the substrate enzyme complex can not form. This is important in my experiment because if the yeast (enzyme) was to become denatured then it would not be able to bind with the substrate (e.g. glucose) and the react ion would not be catalysed, preventing any CO2 from being formed. I must ensure that temperature is kept constant throughout. PH Another factor which can affect enzymes is pH. Enzymes also have an optimum pH which is pH enzymes work best at. Changing the pH can change the tertiary structure due to the number of H+ ion in an acid or the OH- ions in an alkali. These ions disrupt the hydrogen and ionic bonds between -NH2 and -COOH. This will cause the tertiary structure to break down and changing the active site in the process. Once again, the substrate will no longer be able to bind with the active site, hence no substrate enzyme complex will form. I intend to use a buffer solution which will resist any changes in pH. SUBSTRATE CONCENTRATION Increasing substrate concentration increases enzyme activity as they are more molecules to occupy the active site, thus a faster reaction. If more enzyme substrate complex forms then more CO2 will be produced. However this is occurs only for a certain period until all the active sites are saturated with substrates. Therefore an increase in substrate concentration will not result in a increase in the rate of reaction. Carbohydrates such as glucose and sucrose are too soluble and reactive to be stored as they come as they would present osmotic problems and so they are stored in much more complex, insoluble structures known as polysaccharides. Polysaccharides are macromolecules formed by the joining of many monosaccharides together in condensation reactions. There can be more than 3000 repeating units in a chain, joined by glycosidic bonds, forming many complicated structures, one being starch. Starch is a polymer of alpha glucose, where the hydroxyl group is below the ring, and is made up of 30% amylose and 70% amylopectin. Amylose is a long polymer consisting of over 300 monomers joined by 1,4 glycosidic bonds. Amylopectin gives starch its compact store of energy property as it consists of monomers of glucose in 1,4 and 1,6 linkages causing the chain to branch out. Amylopectin can contain several thousand monomers and forms a coiled up structure which is a valuable store of energy for living organisms. Starch is suited to storage as it is insoluble in water and therefore cannot move out of the cells during osmosis. However, it can easily be broken down to produce simpler carbohydrates by a hydrolysis reaction via the enzyme zymase produced by yeast. It is broken down firstly into maltose then into glucose then into carbon dioxide and ethyl alcohol. In this experiment we used two different types of the Saccharomyces Cerevisiae (saccharo meaning sugar and myces meaning fungus) sub- species of yeast to respire the carbohydrates; bakers and brewers. Both are made up of small cells, separated by walls of cellulose with a living organism inside called a protoplasm. Yeast cells reproduce by budding, and do so every two to three hours under ideal conditions. All types of yeast will respire carbohydrates to make energy in order to reproduce. Therefore, when sugar is added to the Brewers yeast, the yeast cells secrete the enzyme zymase to begin respiring the carbohydrate substrate according to the following equation: C6H12O6 + 6O2 = 6CO2 + 6H2O + 2900kJ Glucose + Oxygen = Carbon + water + Energy dioxide This is known as aerobic respiration due to the presence of oxygen, (defined as free or molecular oxygen atoms participating in the respiratory breakdown of organic substances). Brewers, however, are more interested in anaerobic respiration, (defined as when the respiratory breakdown of organic substrates takes place without the participation of free or molecular oxygen atoms). In yeast, anaerobic respiration is sometimes called fermentation. This happens when the enzyme secreted by yeast, known as zymase, catalyses the break down of glucose to produce ethyl alcohol, in abundance and less carbon dioxide, (which they use to create the fizz). It happens that starch is broken down to form maltose, maltose is broken down into glucose and glucose breaks down according to either the aerobic or anaerobic respiration equation, depending on the conditions. Therefore, Brewers use anaerobic (airtight) conditions and most of the reaction happens according to this equation: C6H12O6= 2C2H5OH + 2CO2 + 84kJ Glucose = Ethyl + Carbon + Energy Alcohol dioxide This produces the desired product i.e. the alcohol and the bi- product of carbon dioxide, which we collect in this experiment. The Bakers yeast is very similar to Brewers except it is used for a slightly different commercial purpose i.e. bread making. The yeast respires aerobically in this process as the main function is to inflate the dough to make it softer, and therefore, the desired product comes from the first equation: C6H12O6 + 6O2 = 6CO2 + 6H2O + 2900kJ Glucose + Oxygen = Carbon + water + Energy dioxide The reaction also requires nitrogen from the air to act as a nucleating site for the carbon dioxide to form bubbles against and therefore produces a good yield of carbon dioxide. In most processes where yeast is used, it will have been cultivated to suit that purpose, e.g. to produce more carbon dioxide or more ethyl alcohol, therefore there will often be a big difference between the behaviour of the two yeasts. We can test this in this experiment as the variable of the condition (whether it is in aerobic or anaerobic conditions) is being standardised by both the experiments being carried out in aerobic conditions. This is due to the fact that there is a good oxygen supply whilst the yeast is preheated and during gas collection, when the system is air tight, it is not left long enough for it to use up the oxygen and respire anaerobically. This is a favourable condition for maximum CO2 production however as, according to the equation, there are six moles of CO2 produced aerobically and only two moles of gas produced anaerobically. Aim: The aim of the pilot experiment is to investigate the optimum temperature and concentration of carbohydrate, that, when respired with yeast, produces the biggest volume of carbon dioxide. PLANNING: THE DEPENDANT AND INDEPENDENT VARIABLE: The dependant variable will be the volume of C02 produced during respiration and the independent variable will be the substrates that I decide to use in the experiment. These are Glucose, Fructose, Maltose, Lactose and Sucrose. NULL HYPOTHESIS: The type of carbohydrate being respired will have no significant effect on the amount of carbon dioxide produced in a given time. HYPOTHESIS: In accordance with the information that has been gathered, the following hypotheses were derived; Hypothesis one: When respired by yeast, different types of carbohydrates will produce different amounts of CO2. I believe this because glucose is a monosaccharide which consists of one molecule, sucrose is a disaccharide, which consists of two molecules and starch is a polysaccharide, consisting of many molecules. This means they all have different molecular structures and therefore will break down with different levels of ease. In order to keep an open mind however, the following null hypothesis was also noted; Null hypothesis one: The type of carbohydrate being respired will have no significant effect on the amount of carbon dioxide produced in a given time. The second hypothesis was theorised relating to the variable of the yeast: Hypothesis two; Different types of yeast will produce different volumes of CO2. I predict this because the commercial purposes of Bakers and Brewers yeasts are different and therefore special cultivations might have made the yeast better designed for one purpose than the other. Again a null hypothesis was also adopted; Null hypothesis two: There will be no significant difference between the amount of carbon dioxide produced by the Bakers and the Brewers yeast. Apparatus: The following apparatus will be used when conducting the experiment: Beehive shelf Trough 200cm3 measuring cylinder 500ml beaker Tripod 25cm3 of bakers yeast 25cm3 of brewers yeast 25cm3 of sucrose 25cm3 of glucose 25cm3 of starch Bunsen burner Gauze Heat proof mat Rubber tubing 50ml conical flask Thermometer Spill Delivery tube with bung Stopwatch Clamp Clamp stand METHOD: 25cm3 of the desired yeast and 25 cm3 of the desired carbohydrate was mixed together and preheated at the required temperature for 1 hour in an electronic water-bath. 400cm3 of water was preheated to the same temperature as the yeast using the Bunsen burner. The trough was filled with water and a 200cm3 measuring cylinder was inverted by filling it with water then pressing a piece of paper onto the top to prevent any air bubbles from getting in. The beehive shelf was placed in the centre of the trough and the measuring cylinder was clamped in place, with the top resting on the beehive shelf, the hole being directly under it. A small piece of rubber tubing was inserted into the beehive shelf through the hole in the side, up into the inverted cylinder, and the other end was attached to the delivery tube. The yeast was placed in the preheated water-bath and the bung from the delivery tube was replaced. The delivery tube was inserted into the hole in the side of the beehive shelf and the stop watch was started. Thirty seconds was timed then the beaker with the yeast/carbohydrate mix was swirled for 5 seconds to mix the yeast/carbohydrate. This was repeated every thirty seconds for fifteen minutes, with readings being taken at three five minute intervals. The correct temperature in the water bath was maintained by adding more hot water to it throughout the experiment. This was repeated using each different type of sugar with each different type of yeast: Bakers glucose, Bakers sucrose, Bakers starch, Brewers glucose, Brewers sucrose, Brewers starch. Control of the variables of the method: In order for this experiment to be run fairly there are certain controls that should be taken into consideration: -The temperature must be kept constant by refilling the water bath with warm water. -The yeast/carbohydrate solution should be pre-mixed and preheated for the same amount of time i.e. one hour, in each experiment. -The gas should be collected at three 5 minute intervals for each condition. -The solution should be swirled every thirty seconds for five seconds to mix the yeast and carbohydrate together. -The temperature and concentration should be the same for each experiment; 35ËÅ ¡C and 7.5% respectively. -The amount of yeast to carbohydrate should be kept constant i.e. 25cm3 of each. -The same method should be used; the rubber tube, collection of gas in an inverted measuring cylinder, as certain ways are more accurate than others. Control of the measurements: When taking measurements, the following points should be noted: -When measuring the gas, measure to the bottom of the meniscus of the water. -Make sure the measuring cylinder is perpendicular to the clamp stand to ensure that the water lies at the correct level. -When timing, do not shake at 30 seconds by the stopwatch because 5 seconds is added on each time (while it is shaken) and therefore by the sixth minute or so it will require shaking as soon as it has been shaken. -Keep a constant check on the thermometer to ensure the temperature does not drop. Results: A summary table to show volume of gas produced by bakers and brewers yeast with three different carbohydrate substrates: Amount of CO2 produced in cm3 in fifteen minutes in each condition The table above shows the results of our practical, including my own, highlighted in blue. The average volume of gas collected in each separate condition is shown and reveals that most gas was produced in the brewers glucose experiment, at 115.6 cm3 and the condition that produced the lowest average was brewers starch, at 9.4. The range of the averages was 94.3, showing there was a large difference between the values. Analysis of the results: The graph above clearly shows the difference between the three carbohydrate substrates to be significant. It is clear that the order for most CO2 produced is glucose, sucrose, starch, the greatest difference being between sucrose and starch. It also appears that the results are closer together for bakers yeast than for brewers. The average for bakers yeast was slightly higher at 74cm3 than the Brewers at 71.2cm3. Students T test: The descriptive statistics above, however, only tell us what has been found, they do not tell us the probability of achieving the scores we did, and therefore an inferential students t test was applied. The students t test was devised to analyse smaller sets of samples; to determine whether the results were due to chance or the manipulation of the independent variable. It works out that if the difference between the variance of the sum of the two means (of the two samples) is greater than twice the standard deviation of the difference between the means (of the two samples) then this is unlikely to have of occurred by chance, and therefore our data is significant. Glucose v Sucrose bakers: t-Test: Two-Sample Assuming Equal Variances Variable 1 Variable 2 Mean 103.6667 93.25641 Variance 927.0702 595.5641 Observations 39 39 Pooled Variance 761.3171 Hypothesized Mean Difference 0 df 76 t Stat 1.66608 P(T