Thursday, November 28, 2019
3 Tips for Writing Your Williams College Supplement
3 Tips for Writing Your Williams College Supplement SAT / ACT Prep Online Guides and Tips Williams is among the most selective colleges in the country, with an acceptance rate of 15 percent. As part of your Williams application, youââ¬â¢ll need to respond to the Williams writing supplement. In this article, weââ¬â¢ll cover the three questions that make up the Williams writing supplement, offer suggestions for what to write about in your essay, and give you tips for crafting the best essay possible. The Williams Writing Supplement There are three different questions on the Williams writing supplement. You need to respond to one of them as part of your application. 1. At Williams we believe that bringing together students and professors in small groups produces extraordinary academic outcomes. Our distinctive Oxford-style tutorial classes- in which two students are guided by a professor in deep exploration of a single topic- are a prime example. Each week the students take turns developing independent work- an essay, a problem set, a piece of art- and critiquing their partnerââ¬â¢s work. Focused on close reading, writing and oral defense of ideas, more than 60 tutorials a year are offered across the curriculum, with titles like Aesthetic Outrage, Financial Crises: Causes and Cures, and Genome Sciences: At the Cutting Edge. Imagine yourself in a tutorial at Williams. Of anyone in the world, whom would you choose to be your partner in the class, and why? 2. Each Sunday night, in a tradition called Storytime, students, faculty and staff gather to hear a fellow community member relate a brief story from their life (and to munch on the storytellerââ¬â¢s favorite homemade cookies). What story would you share? What lessons have you drawn from that story, and how would those lessons inform your time at Williams? 3. Every first-year student at Williams lives in an Entry- a thoughtfully constructed microcosm of the student community thatââ¬â¢s a defining part of the Williams experience. From the moment they arrive, students find themselves in whatââ¬â¢s likely the most diverse collection of backgrounds, perspectives and interests theyââ¬â¢ve ever encountered. What might differentiate you from the 19 other first-year students in an entry? What perspective(s) would you add to the conversation with your peers? Each question has the same instructions: respond to the prompt in 300 words or fewer. Writing the Williams writing supplement is optional, so you can choose whether you want to answer a question or not. Should I Write an Essay for the Williams Writing Supplement? When youââ¬â¢re working on your Williams College application, you might notice that the Williams Writing Supplement is entirely optional. So should you write an essay? Or skip it altogether? It would be a huge mistake to not write the Williams College supplement. While the instructions do say optional, the statement isnââ¬â¢t really optional. Choosing not to write an essay will make you look like you donââ¬â¢t care that much about being accepted to Williams. Along the same lines, your Williams writing supplement is a great way to show the admissions committee aspects of your personality that arenââ¬â¢t highlighted in the rest of your application. Take that opportunity! Show the admissions committee why you belong on Williamsââ¬â¢ campus. What Should I Write About in My Williams College Supplement? Letââ¬â¢s take a look at each of the Williams College supplement questions and discuss what you could write about in each. At Williams we believe that bringing together students and professors in small groups produces extraordinary academic outcomes. Our distinctive Oxford-style tutorial classes- in which two students are guided by a professor in deep exploration of a single topic- are a prime example. Each week the students take turns developing independent work- an essay, a problem set, a piece of art- and critiquing their partnerââ¬â¢s work. Focused on close reading, writing and oral defense of ideas, more than 60 tutorials a year are offered across the curriculum, with titles like Aesthetic Outrage, Financial Crises: Causes and Cures, and Genome Sciences: At the Cutting Edge. Imagine yourself in a tutorial at Williams. Of anyone in the world, whom would you choose to be your partner in the class, and why? While it may seem like there are endless ways to answer this question, there are really only two real options: you can pick someone you know personally or you can pick someone youââ¬â¢ve never met, but have always wanted to. Whichever direction you go in, you should make sure to have a specific reason for choosing that person. If you pick someone you know personally, you can use this essay as an opportunity to talk about experiences youââ¬â¢ve had that have greatly affected you. You could, for instance, choose someone you met on a service trip who taught you about hard work or the director of a musical that you participated in that taught you a lot about self confidence. In either of these examples, youââ¬â¢ll be able to talk not only about the influential figure, but about an important part of your life (the service trip or the musical). If you decide to go the celebrity or famous person route, you should make sure to have a real reason why you want to meet that person - a reason that reflects how they influence you. Love isnââ¬â¢t the same as influence - you can love a celebrity but that doesnââ¬â¢t mean theyââ¬â¢ve had a huge impact on your life. Itââ¬â¢s fine to pick Chrissy Teigen, but only if you talk about how youââ¬â¢d really like her help dissecting a tutorial on social media. If youââ¬â¢re struggling to pick a person, it can be helpful to come up with a tutorial topic that youââ¬â¢d like to participate in first. Having parameters like class topic can be useful for giving you ideas for how to answer the question. Each Sunday night, in a tradition called Storytime, students, faculty and staff gather to hear a fellow community member relate a brief story from their life (and to munch on the storytellerââ¬â¢s favorite homemade cookies). What story would you share? What lessons have you drawn from that story, and how would those lessons inform your time at Williams? While this prompt talks a Williams-specific tradition, Storytime, the question itself is a common one in admissions essays: sharing about a time when you learned an important lesson. To master this prompt, you need to pick a specific experience. It doesnââ¬â¢t need to be earth-shattering or impressive, but it does need to have real significance in your life. You should pick an authentic experience that you actually had - donââ¬â¢t make something up or exaggerate to try to seem more important. Your essay should have a clear narrative arc with a beginning, middle, and end. Make sure to include your takeaways and reflections in the end of the response. Every first-year student at Williams lives in an Entry- a thoughtfully constructed microcosm of the student community thatââ¬â¢s a defining part of the Williams experience. From the moment they arrive, students find themselves in whatââ¬â¢s likely the most diverse collection of backgrounds, perspectives and interests theyââ¬â¢ve ever encountered. What might differentiate you from the 19 other first-year students in an entry? What perspective(s) would you add to the conversation with your peers? This Williams College supplement prompt gives you an opportunity to share more about what makes you unique. Donââ¬â¢t fall into the trap, though, of sharing too much! Pick one specific trait or identity to talk about. You donââ¬â¢t need to talk about every single thing youââ¬â¢ve ever done or liked. In your essay, be sure to talk about how the trait or identity you chose has affected your perspective. Maybe being introverted has let you observe more about other people. Maybe being a member of the LGBTQ+ community has taught you about the importance of respecting othersââ¬â¢ differences. Whatever you choose, make sure to fully flesh out how and why that trait has affected your perspective and why that perspective would be valuable to the Williams community. Tips for Writing a Strong Williams College Supplement Essay Writing a strong Williams College supplement essay isnââ¬â¢t just about picking the right prompt to answer. You need to make sure your essay is the best possible example of your work in order to wow the admissions committee. Follow these three tips for writing an amazing Williams supplement essay. #1: Be Authentic The point of a college essay is for the admissions committee to have the chance to get to know you beyond your test scores, grades, and honors. Your admissions essays are your opportunity to make yourself come alive for the essay readers and to present yourself as a fully fleshed out person. You should, then, make sure that the person youââ¬â¢re presenting in your college essays is yourself. Donââ¬â¢t try to emulate what you think the committee wants to hear or try to act like someone youââ¬â¢re not. If you lie or exaggerate, your essay will come across as insincere, which will diminish its effectiveness. Stick to telling real stories about the person you really are, not who you think Williams wants you to be. #2: Play With Form The Williams College supplement essays leave a lot of room open for creative expression - use that! You donââ¬â¢t need to stick to a five paragraph essay structure here. You can play with the length and style of your sentences - you could even dabble in poetry if that makes sense! Whichever form you pick, make sure it fits with the story youââ¬â¢re trying to tell and how you want to express yourself. #3: Proofread and Polish Your Essay Your Williams essay should be the strongest example of your work possible. Before you turn in your application, make sure to edit and proofread your essays. Your work should be free of spelling and grammar errors. Make sure to run your essays through a spelling and grammar check before you submit. Itââ¬â¢s a good idea to have someone else read your Williams College supplement essay, too. You can seek a second opinion on your work from a parent, teacher, or friend. Ask them whether your work represents you as a student and person. Have them check and make sure you havenââ¬â¢t missed any small writing errors. Having a second opinion will help your work be the best it possibly can be. Final Thoughts While the Williams College supplement says itââ¬â¢s optional, itââ¬â¢s not really! You should answer the essay as part of your application. When writing your Williams College supplement response, DO: Be authentic and true to yourself. Tell stories that are meaningful to your identity and experience. DONââ¬â¢T: Lie or exaggerate to seem more important. Forget to proofread or polish your essay. Whatââ¬â¢s Next? Wondering how to ace the Common Application? No problem! Weââ¬â¢ve got you covered with tips and tricks to make your application stand out from the crowd. Starting your essay is often the hardest part.If you're unsure where to begin, check out this guide to starting a college essay perfectly, and don't be afraid to just dive right in! If you're applying to Williams College, you're likely applying to other colleges on the East Coast, too. Check out our expert guides to the Duke essay, the Tufts essays, and the Harvard essay. Want to write the perfect college application essay? Get professional help from PrepScholar. Your dedicated PrepScholar Admissions counselor will craft your perfect college essay, from the ground up. We'll learn your background and interests, brainstorm essay topics, and walk you through the essay drafting process, step-by-step. At the end, you'll have a unique essay that you'll proudly submit to your top choice colleges. Don't leave your college application to chance. Find out more about PrepScholar Admissions now:
Monday, November 25, 2019
Internal Audit of Ryanair Essays
Internal Audit of Ryanair Essays Internal Audit of Ryanair Paper Internal Audit of Ryanair Paper This paper is to examine the key potential drivers within the present internal environment. Several models would be applied to support the answer and they are Stakeholder Power/Interest Matrix, Cultural Web, Resource audit, Value Chain, and threshold and core competences. With using Ryanair as an industrial example, this essay would talk about how important strengths and weaknesses are to be used in designing strategy. Ryanair was founded in 1985 by Tony Ryan who already died in 2007. It was originally a full service airline and turned into a low-cost carrier in 1990s. Ryanair used a series of cost-cutting policies to attain to the target as its mission statement (Ryanair Annual Report, 1999): ââ¬Å"Ryanair will become Europeââ¬â¢s most profitable, lowest cost scheduled airline by providing its low fares/no frills service in all markets in which it operates to the benefits of our passengers, people and shareholdersâ⬠Ryanair is now the largest low-cost carrier in Europe and is controlled mainly by the chief executive officer, Michael Oââ¬â¢Leary. The following would be the further explanation of the key potential drivers within its current internal environment. Figure [ 1 ] Stakeholder power/interest matrix adapted from Mendelow (1986) Stakeholder mapping help identify stakeholder expectations and power and help in understanding political priorities. (Mendelow, 1986 cited in Johnson et al, 2011) The mapping shows Michael Oââ¬â¢Leary and David Bonderman are the main facilitators of the strategies. Their power and interest in Ryanair is so large to be the key player to influence the strategies. EU and BAA this kind of official authority could possibly be the blocker of the strategies as they are the rule setter. Ryanairââ¬â¢s strategies should follow their regulations. In addition, customersââ¬â¢ expectation should be most considered since they have highest expectation on Ryanairââ¬â¢s performance. Manager could thus realize which internal or external stakeholders are needed to be more considered when they carry out a new strategy. Meanwhile, the purpose of a new strategy should be designed to satisfy the stakeholders. Figure [ 2 ] Cultural web adapted from Johnson et al (2011) Cultural web shows the behavioral, physical and symbolic manifestations of a culture. Johnson et al, 2011) It centers the paradigm associated with six surrounding components which are story, symbol, power structures, organizational structures, control system, and rituals and routine. The cultural shows all the historical culture of Ryanair and managers can thus realize the current environment. It is mainly reflecting its reliance on the top level as well as that Ryanair target so much on ââ¬Å"low costâ⬠and ââ¬Å"high efficiencyâ⬠. The paradigm largely remind the managers of the missions of Ryanair when they are thinking of a new strategy. Organization culture Figure [ 3 ] Value chain adapted from Porter (1985) The value chain describes the categories of activities within an organization which, together, create a product or service. (Johnson et al, 2011) It helps the manager understand that its best value would be found in the operatio. Basically customers who usually fly with Ryanair would mostly be interested in its low-fare ticket so, as a low-cost carrier, Ryanair mainly add value to its product through packaging in the cheapest way. Simultaneously, Ryanair keeps other primary activities common to its competitors so it will not be outperformed easily. Additionally, human resource and procurement would be th e most value-adding supporting activities of Ryanair. Through long-term outsourcing some of the operations such as baggage handling, car hiring, insurance and etc. to the third parties, and contracting with suppliers so as to get certain discounted price, Ryanair could lower the cost of its operation and supported hardware. Constantly, Ryanair further cut its operational cost by recruiting limited staff and offering low-cost training. These kinds of cost-cutting policies would be able to add value to its products and could hardly be imitated or duplicated by its competitors. Hence, the value chain could clearly show that Ryanairââ¬â¢s competitive position is highly related to its low-fare products. Resources are the assets that organizations have or can call upon (e. g. from partners or suppliers); competences are the ways those assets are used or deployed effectively. Johnson et al, 2011) For the physical resources, Ryanair currently has 272 Boeing 737-800 in operation. It is headquartered and owns Ryanair Direct limited in Dublin. Current assets could be considered one of financial resources and the rest would be current liabilities, long-term debt and shareholdersââ¬â¢ funds. Human resources include over 8,000 people working around the world, Michael Oââ¬â¢ Leary, who is the chief executive officer and David Bonderman, who is the chairman of Ryanair. Intellectual resources of Ryanair would be its own webpage. Threshold competences are those needed for an organization to meet the necessary requirements to compete in a given market and achieve parity with competitors in that market. (Johnson et al, 2011) The main competence of Ryanair is that they provide flights at a low price. They do this, for example, by having a no-frills and ancillary service, fleet commonality, contracting service out, using secondary and regionally airports. Core competences are the linked set of skills, activities and resources that, together, deliver customer value, differentiate a business from its competitors and, potentially, can be extended and developed. (Johnson et al, 2011) A core competence must fulfill the following three criteria, a core competence gives a company the opportunity to enter different markets; a core competence must provide a significant contribution to the advantages a customer has with a given product; a core competence must be difficult for a competitor to imitate. Hamel Prahalad, 1994) Quick turnaround time is one of the aforementioned targets Ryanair is focusing on. It lets passengers walk straight out through the front and back exit or entrance, and does not use the air bridges. Simultaneously it does not offer any pre-assigned seats so more possibly passengers are ready at the gate before the boarding time to choose their preferred seats. These are all arranged in order to quicken the procedures that fli ghts get ready to disembark or embark the passengers. Additionally, it does not serve free food and drink on-board so as to speed up the cleaning process as the cabin crews could finish the cleaning more quickly during stops and complete cleaning would only be done at nights. This could not be achieved by full service airlines because of more debris and possibly trade union resistance. (Shaw, 2004) A unique cost cutting policy would be the main core competence of Ryanair. It refuses to provide any meal vouchers or hotel accommodation for flights which are delayed or cancelled for reasons beyong Ryanairââ¬â¢s control in order to reduce the operating cost. Ryanair, 2011) Meanwhile, Ryanair is using LFA business model to design the size of its flightsââ¬â¢ seats which are 30-inch tall while an economy class seat of a full service airline usually has a seat pitch of 32 inches. (Doganis, 2001) For instance, Ryanair fits 189 seats into its Boeing 737-800 (Ryanair, 2011) while KLM fits 171 seats (KLM, 2011) and Qantas fits 168 seats into their Boeing 737-800. (Qantas, 2011) Higher seat density could thus generate a potential cost advantage. Strengths and weaknesses could be summarized from the above key internal drivers. By understanding the strengths and the weaknesses, managers could think about the strategic capability of Ryanair so as to overcome the business environment and thus design the future strategies to outperform its competitors. (Bladwin, 2008; Johnson et al, 2011, p. 106) Strengths of Ryanair could be high efficiency of its service, quick turnaround time, low-fare ticket, comprehensive internet service and ancillary services. However, low-class service would be a weakness of Ryanair as it provides no in-flight meals, entertainment, multi-class seating and other amenities. In addition, Ryanairââ¬â¢s service is mainly offered in less conveniently located airports. Booking possibility for flights is limited in travel agencies. Simultaneously, Ryanair has no links with other flights provided by different airlines. Existing strategy of Ryanair would be of the direction of market penetration (Ansoff, 1957). Ryanair would consolidate to defend its market share in the face of the intense competition of the airline industry since there are three recent large airline mergers, BA-Iberia, KLM-Air France and Lufthansa-BMI. Ryanair is trying to cut out the less profitable routes, reduce unprofitable winter capacity at high-cost airports such as Dublin and Londonââ¬â¢s Stansted. Constantly, Ryanair focused more on the more profitable routes by flying more frequently and charged more by its unique cost-cutting policies. According to the PIMS (Profit Impact on Market Strategy) findings, high volume and particularly high market share can lead to lower overall costs and higher profitability (Russel Gale, 1987)
Thursday, November 21, 2019
High temperature polymers Essay Example | Topics and Well Written Essays - 2000 words
High temperature polymers - Essay Example Introduction: Polymers or most ordinarily known as plastics is used abundantly in a wide range of applications. In fact, they are seen almost anywhere in our daily lives. Polymers are those substances that are composed of individual monomers cross linked with long chains and bonds. They are composed of a long chain of carbon backbone constituted with other elemental contributions such as O,N,S,F, Si and S. Polymers are organic materials. Generally, their basic properties include lightweight, good insulation properties, ductile, low strength, and good noise and vibration dampers. There are plastics used widely in many industries and can even be seen in everyday lives. Majority of the packaging materials seen today uses polymers with varying densities. Polymer molecular structures are large with complex bonds and chains. There are high density polymers and low density polymers. As per molecular structure, these polymers differ in their chain length, chain branching and the inter-chain bonds (Reusch). As a common misconception, polymers are said to be applied in low temperatures as they are known to degrade immediately with the presence of heat and exposure to high temperature. There is however, a special kind of polymer- the high temperature polymer that exudes exemplary properties greatly superior than ordinary ones. Their applications are slowly introduced in the market and little by little replace the more conventional structural materials. High Temperature Polymers: Definition and Properties Plastics as considered with their physical appearance are not known to be used in high temperatures due to misconception that they easily melt with application of heat. This may be true somehow as most plastics found in nature are easily destructed with high temperature. However, there are some kinds of plastics that are designed differently from all the rest. Indeed, there are plastics and polymers that are resistant with temperatures and they are guaranteed to be of bes t application when high temperature and heat are concerned. High temperature polymers are those plastics that can withstand temperatures above 135oC. They are known as the ââ¬Ëcommodityââ¬â¢ plastics and at the moment, it has increased in the percentage in the total plastic usage (Performance 1). These are stable plastic materials derived through lengthy and vigorous research works and innovative inventions of brilliant minds that walked through this life that prove that the synthetic chemistry field has reached maturation. Applications of these materials range widely as there are many technologies where these polymers are used. It is important to note that high temperature polymers have properties that bypassed those ordinary ones. Heat transfer is mostly through conduction. Specific heats have a range of 0.7-2.5 kJ/kg-K. Polymer composites on the other hand have variable specific heats depending on the average weight of the components. Thermal conductivity ranges from 0.1 -0 .2 W/m-K (Tant et al 4). It is also important to note that the value may differ when there is incorporation of other particles in the materials (5). The maximum tensile stress application can reach from 455 kPa or 1820 kPa (6). Properties of composite polymers that are applicable for high temperatures have higher values as compared to other materials. High temperature
Wednesday, November 20, 2019
Smartphone and the Lives of Americans Today Essay
Smartphone and the Lives of Americans Today - Essay Example Sarwar and Soomro identified the fields of business, education, healthcare, human psychology, and social life as some of the greatest beneficiaries of the Smartphone ââ¬Ëcrazeâ⬠. However, the workplace, homes, schools, and healthcare providers are the chief users of mobile phones. This study takes a closer look at the phenomenon impact that Smartphones have had in the workplace, healthcare, socialization, and entertainment. Healthcare has greatly benefited from the introduction of Smartphones. Through the use of Smartphones, the face of healthcare has immensely changed not only in the actual provision but the participation as well (Sarasohn-Kahn 8). Information access has been the main hallmark of the internet. According to Sarwar and Soomro (220), 275 of Smartphone owners use it for online information search with 10 million of the Smartphone users in the U.S using the device to seek health facilities and information. The health information sought by the Smartphone users includes healthcare facilities, symptoms of diseases, and prescriptions. This proves that the Smartphones have significantly contributed to the emancipation of the American public of different aspects of their health. Smartphones have, therefore, helped work towards a healthier nation. With the ObamaCare going online, the Smartphone users who seek health services using their devices is yet to grow. According to Sarasohn-Kahn (7), in February 2010, the Apple Store had about 4000 applications that were intended for patient users. Application provider, Gartner, said that health applications were within the top ten applications in 2012. This trend is a testimony of the increasing acceptance of the Smartphones as an integrated healthcare platform.Ã
Monday, November 18, 2019
Lao-Tzu or Kafka Essay Example | Topics and Well Written Essays - 500 words
Lao-Tzu or Kafka - Essay Example After understanding self, it is important for the individual to understand other humans and live with them in harmony. But the ultimate understanding comes when the individual understands the universe and nature and learns to live according to the universal rules of nature. He has connected unrelated things like nature and warfare with complete success. ââ¬Å"Therefore a wise prince, marching the whole day, does not go far from his baggage wagons. Although he may have brilliant prospects to look at, he quietly remains in his proper place, indifferent to them. How should the lord of innumerable chariots carry himself lightly before the kingdom? If he do act lightly, he has lost his root; if he proceed to active movement, he will lose his throneâ⬠. The life and work of Lao were very closely connected to the above Biblical proverb as he was a man of wisdom and he stressed the importance of wisdom and understanding all his life. His work Tao Te Ching, which meant ââ¬ËThe Law of virtue and its wayââ¬â¢, is a testament of wisdom and understanding. Lines like the following are the embodiment of wisdom and understanding of all the elements. Lao commended the sage who has all the understanding and wisdom; but never makes an exhibition of it. He can command people and make things happen without using any speech and this is done on the strength of his wisdom and understanding of human nature. His following words show perhaps the most understanding sentence of life: ââ¬Å"à Heaven and earth do not act from any wish to be benevolent; they deal with all things as the dogs of the grass are dealt with. The sages do not act from any wish to be benevolent; they deal with the people as the dogs of the grass are dealt with.â⬠http://www.wsu.edu/~dee/CHPHIL/LAOTZU.HTM He argued that from wisdom comes humility devoid of all self importance. With the understanding of human nature and the nature around us, we attain humble command
Friday, November 15, 2019
Similarities between Photosynthesis and Aerobic Respiration
Similarities between Photosynthesis and Aerobic Respiration Photosynthesis and aerobic respiration are both part of a cyclic process of biochemical reactions. Photosynthesis requires the products of aerobic respiration (carbon dioxide and water), while aerobic respiration requires the products of photosynthesis (glucose and oxygen). Together, these reactions are involved in how cells make and store energy. The energy transfers in both processes and in how the gas exchange between oxygen and carbon dioxide occurs and the end products that result from each process are somewhat opposite processes, thus aerobic respiration and photosynthesis are in some ways complete opposites of each other. Photosynthetic organisms such as plants use solar energy to reduce carbon dioxide into carbohydrates. During respiration glucose is oxidised back to carbon dioxide, in the process, releasing energy that is captured in the bonds of ATP. Although these two energy producing processes differ in their uses and also their goals, they do have several similarities. Photosynthesis is a chemical process that takes place in the presence of sunlight, wherein plants manufacture their food and build stores of energy. This phenomenon occurs in chlorophyll containing plant cells. Chlorophyll is a pigment found in plant leaves that gives the plant its green colour. Chlorophyll absorbs the light energy and utilises it to produce carbohydrates from carbon dioxide and water. These carbohydrates produced are used by the plants as a source of immediate energy for growth, reproduction, and absorption of nutrients. The chemical reaction produces oxygen which is released into the atmosphere. Photosynthesis can be summed up by the following equation: 6CO2 + 6H20 + Sunlight à ¯Ãâà C6H1206 + 6O2, (fig1 below illustrates the process of photosynthesis) Occurring in the chloroplast light reaction converts solar energy to chemical energy of ATP and NADPH.The light reactions use the solar power of photons absorbed by Photosystem I and II. These are light gathering antennas containing the chlorophyll primarily responsible for absorbing the light. Electrons are also carried from Photosystem I and II via NADPH to the Calvin cycle. The Calvin cycle uses ATP NADPH to convert CO2 to sugar.CO2 enters the cycle leaves as sugar. The sugar product of the Calvin cycle is not glucose but a 3 carbon sugar called 3-Phosphoglycerate. This 3- Phosphoglycerate with the addition of another phosphate group from ATP forms glyceraldehyde-3-phosphate .In order for one of these G3P molecules to be synthesised the cycle must take place 3 times, fixing 3 molecules of CO2.There are 3 phases of the Calvin cycle, the carbon fixation phase, the carbon reduction phase and the regeneration phase. Cellular respiration is the process of oxidising food molecules or breaking down chemical bonds of glucose into carbon dioxide and water. The energy released in the process is trapped in the form of ATP and used by different energy consuming activities of the cell. It is a set of metabolic reactions that unlike photosynthesis which occurs in the chloroplast, cellular respiration occurs in the mitochondria. The complete breakdown of glucose into carbon dioxide and water involves two major steps: glycolysis and aerobic respiration. Glycolysis is the anaerobic catabolism of glucose that occurs in all the cells and produces two molecules of ATP. Aerobic respiration is the process in which the pyruvate molecules produced by glycolysis undergoes further breakdown in the presence of oxygen and generates thirty four molecules of ATP. This reaction can be described as follows: C6H1206 + 602 à ¯Ãâà 6CO2 + 6H2O + Energy (38 ATP)(fig2 below illustrates cellular respiration) Cellular respiration beginning here with glycolysis catabolises glucose into 2 molecules of pyruvate. The net yield from glycolysis is 2 ATP 2 NADH per glucose. Electrons are carried from here to the electron transport chain via NADH. Pyruvate enters the mitochondrion where it gets modified to Acetyl COA. This then enters the Krebs cycle. The Krebs cycle completes the oxidation of the organic fuel to CO2.Electrons produced here are carried via NADH FADH2 to the electron transport chain oxidative phosphorylation. In the Krebs cycle a further 2 ATP is produced. Once there has been a sufficient energy shuttle of NADH from glycolysis, a maximum yield of 34 ATP is produced by oxidative phosphorylation. This then gives a maximum of 38 ATP produced. Photosynthesis is a reduction-oxidation reaction, just like respiration. In respiration energy is released from sugars when electrons associated with hydrogen are transported to oxygen (the electron acceptor), and water is formed as a by-product. The mitochondria use the energy released in this oxidation in order to synthesize ATP. In photosynthesis, the electron flow is reversed, the water is split (not formed), and the electrons are transferred from the water to CO2 and in the process the energy is used to reduce the CO2 into sugar. In respiration the energy yield is 686 kcal per mole of glucose oxidized to CO2, while photosynthesis requires 686 kcal of energy to boost the electrons from the water to their high-energy perches in the reduced sugar light provides this energy. Outlined above are the main differences between the two processes. However, photosynthesis and cellular respiration are two processes that both involve electron transport chains and they both affect concentrations of carbon dioxide and oxygen in the atmosphere. Both photosynthesis and cellular respiration provide energy to the organisms cells. It is interesting to note the structural similarities between Chlorophyll, that plays an important role in photosynthesis and Haemoglobin that is involved in cellular respiration. Both structures are practically identical except for the fact that haemoglobin has a central Iron atom and chlorophyll possesses a central Magnesium atom. Haemoglobin is a protein that carries oxygen in the blood. Where chlorophyll is known for its green pigment, haemoglobin is known for its deep red pigment. Both photosynthesis and respiration are also similar in that they both undergo chemiosmosis. Chloroplasts and mitochondria generate ATP by this same basic mechanism. In both kinds of organelles, electron transport chains pump protons (H+)across a membrane from a region of low H+ concentration to an area of high H+ concentration.The protons then diffuse back across the membrane through ATP syntheses, driving the synthesis of ATP. (fig 3 below illustrates this.) To conclude from this, photosynthesis and cellular respiration are the most vital biochemical pathways to life. They both include cycles, stages and many enzymes to function. Although their similarities can be easily recognised, it is their differences that make them stand apart as opposite processes. Photosynthesis requiring light in order to produce its end product, carbohydrate, and cellular respiration requiring carbohydrate in order to produce its end product energy.
Wednesday, November 13, 2019
EL Medio Ambiente - Spanish Essay :: Papers
EL Medio Ambiente No deseo culpar a nadie, pero son los jÃÆ'à ³venes que no se preocupan por el medio ambiente. Ãâà ¡Supongo que se puede decir que no se preocupan de casi nada! Pero por la poluciÃÆ'à ³n del aire; los adultos tienen la cupla - nunca andan sino llevar el coche todo el tiempo. En este ensayo prentendemos dar respuesta a una pregunta de importancia crucial - Ãâà ¿Quien tiene la culpa?Ãâà ¿Los jÃÆ'à ³venes, los adultos, el gobierno, el ayuntamiento o toda la gente?Ãâà ¿Y quÃÆ'à © pasa si n hacemos nada? Para comenzar, hablaremos sobre el reciclaje. Mi punto de vista es que el reciclaje es mÃÆ'à ¡s comÃÆ'à ºn con los adultos; especialmente con las mujeres. El problema es que no hay muchas contenedores disponibles en Gran BretaÃÆ'à ±a. En EspaÃÆ'à ±a, son mÃÆ'à ¡s populares y el hecho de que hay contenedores en casi cada pueblo, es mÃÆ'à ¡s fÃÆ'à ¡cil para la gente. Otro problemo es que no educamos a los niÃÆ'à ±os sobre la importancia y las ventajas de reciclar. Debemos educar a los niÃÆ'à ±os y a los jÃÆ'à ³venes para crear una conciencia y necesiamos mÃÆ'à ¡s informaciÃÆ'à ³n y mÃÆ'à ¡s publicidad que nos avisa de los problemas. Por ejemplo, en EspaÃÆ'à ±a, hay las campaÃÆ'à ±as reciclado en muchos lugares. AdemÃÆ'à ¡s del reciclaje, hay el problema de la poluciÃÆ'à ³n del aire. Eso es debido a los humos de los coches. Hay cada vez mÃÆ'à ¡s coches en las calles. Debemos usar el transporte pÃÆ'à ºblico , u investigar la posibilidad de fabricar coches que no abusan del medio ambiente, por ejemplo coches elÃÆ'à ©ctricos. Gracias a los humos hay un aumento del nÃÆ'à ºmero de niÃÆ'à ±os que sufren asma. Tenemos que andar mÃÆ'à ¡s - es bueno para la salud y tambiÃÆ'à ©n, no causa daÃÆ'à ±o a la capa de ozono. Ãâà ¡El problema es que la gente es demasiada perezosa! Un problema muy grave es la energÃÆ'à a nuclear. Pienso que es la peor amenaza para el futuro. Hay cada vez mÃÆ'à ¡s centrales nucleares y hay un peligro con las armas nucleares. Una sola bomba nuclear puede ser el fin del mundo. TambiÃÆ'à ©n, es un hecho que la energÃÆ'à a nuclear dura para
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