Ap Bio- Lab 1: Osmosis and Diffusion

AP Biology 16 April 2013 Lab 1: Osmosis and Diffusion The purpose of this experiment is to decide which flasks correspond to the solute concentration of sucrose, which are 0. 8M, 0. 6M, 0. 4M, 0. 8M. This can be determined by the usage of potato cores. If a potato core’s mass decreases after a day soaked in the sucrose solution, then that flask will have a high concentration of sucrose. A) The first step in this lab would be cut out four cores of a potato and measure the masses of each individual potato piece. The mass of the potato core would be a variable factor in this experiment.A way that this variable can be manipulated would be each group would be assigned to a specific potato core mass. A controlled variable in this lab would be to pour a certain amount of sucrose solution from a flask into a breaker. An example would be pour 200ML from flask A into a beaker labeled A, 200ML from flask B into a beaker labeled B, and etc. Next, put 1 potato core in each beaker: A, B, C, and D. Leave the cores in the flasks for a day. After leaving the potato cores to soak in the solutions for a whole day, take out the potato cores.Measure the final mass of each potato core and record this data. Afterwards, calculate the percent change in mass. To calculate the percent change in mass, use this formula: [(mass initial – mass final) / (mass initial) ] x 100%. Measure the data results of the percent change of mass in grams. To show a visual picture of the percent change in mass, graph it. This will help in seeing the sucrose molarity among the solutions. To finish, share data with other groups and compare results among one another to obtain an average of all of the results.This will verify that the results acquired were incorrect or correct. B) My hypothesis was that if a potato core’s mass decreases after a day soaked in the sucrose solution, then that flask will have a high concentration of sucrose. Due to this, I would expect that the potato cores in the 0. 4M, 0. 6M, and 0. 8M sucrose solutions will lose mass. Considering this, the percent change in mass will be negative. In contrast, I would expect that the potato cores in the 0. 2M sucrose solution will gain mass. As a result of that happening, their percent change in mass will be positive.C) Considering the principles of osmosis and diffusion, these would be reasons on why I have these high expectations of my results. In osmosis, water moves through a selectively permeable membrane from a region of higher concentration to a region of lower concentration. This selective membrane only allows certain types of molecules to flow through while other molecules are not able to. In diffusion, molecules are in constant motion and move from an area of higher concentration to an area of lower concentration. In this experiment, the potato core will act like a selectively permeable membrane.In the 0. 2M sucrose solution, the sucrose will not be able to go through the selectively permeable membrane because the sucrose molecules are too big to go through the passages of the membrane. It will, however, allow water molecules to go through the passages of the selectively permeable membrane due to diffusion. Water molecules will be able to pass the selectively permeable membrane because there will be a lower concentration of water in potato then the outside, making the water flowed into the potato core.By this happening, it would make the potato core gain mass. In the high sucrose solutions, such as the 0. 8 solution, the sucrose will still not be able to go through the selectively permeable membrane because of the size of the sucrose molecule. The factor that makes these high sucrose solutions different is the result of having a high sucrose molarity. Having a high sucrose molarity will make the water from the potato cores move out. This would ultimately make the potato cores in high sucrose solutions lose mass.

Authority Essay Example | Topics and Well Written Essays - 1000 words

Authority - Essay Example military, the importance of authority in the military, and also what may happen if authority is either lacking or not respected by the appropriate subordinates. Before exploring how authority is used in the military, it is important to understand what the word means and the ideas that it implies. The Collins English Dictionary offers up a variety of definitions, such as "the power or right to control, judge, or prohibit the actions of others," or "such a power or right delegated, especially from one person to another," or "the ability to influence or control others" (Collins). If we dissect these definitions one-by-one, we can see a recurring pattern across all three: power. Authority can only be gained through power, mostly due to the position that someone holds. A high up position can give someone authority over others because of their job description, which likely allows them to offer guidance to subordinates. Another component of the word authority is that it is delegated or assigned, typically from one person to another. Authority is often found in a chain of command, with those towards to top of the tree afforded more authority than p eople lower down the food chain. Also, authority usually is a two-way street between leaders and followers. There has to be a relationship between each set of individuals and both should know where they stand in the relationship; only in an equal relationship will there be no need for either party to have authority over the other. Informal relationships are often like this, whereas in formal situations authority is necessary in order to preserve some sort of organization within large groups of people. Finally, the definition of authority involves influence or control applied by one person over another. In less formal situations, a leader will look to influence his or her subordinates but not control them. Controlling a group of people allows little room for them to be creative and think outside the box. In formal organizations,

How the 22nd amino acid is produced Essay Example | Topics and Well Written Essays - 750 words

How the 22nd amino acid is produced - Essay Example Even though it’s clear now that the amino acid is a product of enzymes involved reaction with two molecules of lysine, it’s important to know that the researchers are investigating if the molecule might be having complexity in its origin. Pyrrolysine is said to be very difficult to find in organisms and currently only a dozen of organisms posses it, interestingly its discovery was made in 2002 as being genetically encoded by methanogens; microbes that produce methane. The fact that it was first identified in the microbe have made the scientists to look back on the genetic code evolution.Pyrrolysine is now among the amino acids,22 in number that are used for protein synthesis. Protein synthesis involves the successive processes of gene transcription to messenger RNA that comes from the DNA molecule; it relays the genetical information from the nucleus to the cytoplasm where transport and ribosomal RNA carries out the process of translation to produce the required protein from a collection of three amino acids called codons (Kizycki, 2011). The understanding of how the amino acids are made, that is; its biosynthetic pathway provides an in depth knowledge of how amino acids productions can be made. How rare the amino acid is can also be of used (Kizycki, 2011) (Zhang, 2011) (Green-Church, 2011) to manipulate proteins as in the biomedical research, with its mode of synthesis well understood scientists can mimic the procedure to have mass production of other related amino acids for research purposes. The amino acid production process Lysine, other amino acids and some specific enzymes were combined and were anticipated that an intermediates would be produced, the intermediate is an amino acid that is produced during the biosynthetic process, the lysine were labeled so that when mass spectrometry was used it became heavier than the normal one, incidentally one signal produced by the instrumentation had a deviated mass that was attributed to the intermed iate. The biosynthesis of the new amino acid however comes with a surprise that its only precursor molecule is the other amino acid called lysine; this is also affirmed by the Microbiology professor Joseph Kizycki at the Ohio State University that they were not seeing the weird molecule but only the regular pyrrolysine from the two different amino acid they expected.pyrolysine was observed easily as it appeared with labeled lysine (Zhang, 2011). The process to arrive at the amino acid is considered to be very simple as it only involved only three chemical reactions though not all the chemical reactions were known or observed before. What is amazing with the new discovery is that only three enzymes and two molecules with the same origin constitute one molecule with a completely different from the initial molecules used to make it. In the molecule, a portion resembles the precursor completely, but when you compare with anther portion, enzymes are able to link and brings out a complete ly different molecule not been seen at all. The inconsistent nature of the pyrrolysine necessitated the use of mass spectroscopy to precisely analyze the mass of the particles that constitute it. The use of mass spe

Women, marriage, and shame in the nineteenth century France Term Paper

Women, marriage, and shame in the nineteenth century France - Term Paper Example Flaubert relates the marriage and the shame Emma had to endure with the other ordinary women of France and the way French trends were followed by them. Emma, in the beginning of novel, is presented as a beautiful, sharp and happy girl but, after marriage is referred to as a troubled, unhappy and unsatisfied house wife and mother, while at the end of the novel, she portraits herself as a tragic heroine and kills herself. Emma Bovary (Madame Bovary): Madame Bovary, was the young and beautiful wife of a doctor named â€Å"Charles†. She lived in the world of imaginations and fantasy. For Emma, life was nothing but a bundle of excitements. She was not only beautiful, but was also very intelligent and sharp. But, unfortunately, she could not develop her mind as a cautious adult woman. She could not utilize her intelligence and be well-aware of the world and her surroundings. The world in which Emma would live was far more different from the actual world. Emma had a very extremely ro mantic view and imagination of the world. She strongly believed in romance and excitement related to romance. This opinion of her about a beautiful and romantic world differed from the real world. As Emma was in a habit of reading romantic books and novels, this habit drove her even more towards the heights of passion for romance. She grew even more desperate to experience it. After she met Charles, she felt that she was having a great compatibility with him as both of them enjoyed each other’s company. They would spend a lot of time meeting each other which would please not only Emma but also Charles. Soon with the consent of Emma’s father, they got married. But, unexpectedly Emma started getting bored after marriage and started losing interest in her husband. Therefore, Emma’s opinion about marriage and her excitement about romance in the married life perished away. She became quite disillusioned, dull and miserable about her married life as her husband Charle s was very good but a bit dull and boring and was not able to come up with the expectations of his wife, rather the imaginations of his wife. This dissatisfaction with her married life led Emma to two marital affairs. This was because she was trying to seek for more romantic pleasure and wanted to make her life risky and excited. Emma, after marriage, soon gave birth to a daughter who was named â€Å"Berthe†. This could prove to be a change and a reason to get excited fir Emma but even motherhood seemed boring to her and was again disappointed with her life Women in the 19th century France: Women in 19th century France, were quite different and far more responsible and loyal than the way Emma was described I the novel. They not only had to look after their home but also earn for their family. They would work in different fields performing different jobs in order to act as a helping hand for their husband. They would usually work outside their homes without their children, hus band and other members of the family being neglected. Working outside the home would make them face uncountable and unimaginable sorts of challenges which they would face readily and bravely and then would take good care of their family as well. Some women would work indoors as well, such as maids, laundry women, tailors etc. This would not only keep them safe from the challenges of the outer world but also provide them with the income to help their family. But, these kinds of indoor jobs were not always helpful and enough for their family, therefore, majority of them had to go out to

Sociology Research Proposal - Second part to Literature Review Essay

Sociology Research Proposal - Second part to Literature Review - Essay Example The American September 11, 2001 World Trade Centre tragedy was one of severe calamity which claimed many lives. The 9/11 event was followed by another act of terrorism on July 7 in London: A bombing in 2005 which claimed 56 lives. These two activities dominated much of media attention worldwide creating a linkage of a particular religious group in these two activities. The method by which media reporting of these terrorist activities is presented often portrays Islamic-based or Muslim groups in an unfavourable light, creating questions as to the credibility of reporting the events as being somewhat biased. Media reporting often fails to report terrorist activities with objectivity, leaving Australian citizens with a one-sided viewpoint regarding the Islamic faith as a whole, likely creating a level of unsubstantiated discrimination against this entire religious group. This proposed study is designed to examine the reporting methods and media portrayal of Islamic terrorist organizations which might be competently attributed to Australian social discrimination against Muslim individuals. It is proposed that this link can be established between media and Islamic discrimination through analysis of media content within the period followed by the September 11 and July 7 terrorist tragedies. The recent increase in global terrorist activities and the method by which terrorists have conducted many of their hostile activities have attracted attentions of individuals from media and society as a whole. Repetitive press linkage of one particular religious group has given rise to the interest behind this research. The aforementioned American and British tragedies have boosted the over-generalization of the Muslim community as a whole by the media worldwide. Even more specific, Australian media has taken an active interest in the portrayal of those in the Islamic faith as being generically linked to terrorist

Which of Hitler's key Mistakes Had the Greatest Effect on His Defeat Research Paper

Which of Hitler's key Mistakes Had the Greatest Effect on His Defeat in World War II - Research Paper Example Most of the reasons discussed are researched from books and publications that put their focus on the matters surrounding the Second World War, especially those that pay keen attention to the fatal decisions made by Hitler leading to his defeat. The fact that Germany through their leader Hitler lost the war after having played a significant impact in the First World War makes the discussion of its failures interesting. B-Summary of evidence The German Navy’s principal mission at war was to cut the life of Britain’s maritime by means of a blockade. The blockade was arrived at because Britain was an island and the barricade would result in it losing out on metals, fuel, and other elements, which were imported by the merchant ships. It was expected Britain’s forces were to be crippled to the ground by the move and consequently they were to be hit by a consistent air bombardment movement that was anticipated would make Britain surrender (Bevin, pg102). This strategy a gainst Britain would indeed work for the Germans, as in the World War I, the submarines owned by the Germans had succeeded in cutting the amount of British owned merchant ships which were sunk. Regardless of this fact, the German Navy constructed for the World War II was the same to the previous one. Germany’s failure to invest in additional submarines, instead choosing to undermine the British maritime strength hampered the success of Hitler’s force (Carolin, pg56). The German submarines were the greatest risk to the British, but were consequently extremely few, and the slow development of other submarines did give Britain ample time to adapt to the risk and survive with massive endeavor and terrible losses. By the time the German naval force had grouped itself better, the challenge posed by the British was enormous as the latter had a wholly developed antisubmarine force which overwhelmed Hitler’s men. Hitler may have won the war, supposing his strategists foc used on constructing numerous submarines instead of the inconsequential battleships. The war could have been won in Hitler’s favor prior to the US and Russia joining in the war. There were numerous cases of murder by the regime, and the fear of severe punishment created fear in the criticism or even yet provides advices that were not favorable, or even to wake up the dictator late in the night whenever an emergency case presented itself. In such establishments, an individual formulates all the significant decisions and too numerous fewer decisions, and it is almost not possible to transform whatever is on the individual mind, such as Hitler prior to or after the individual formulates a foremost mistake. Deciding on Hitler’s failure or mistakes during the war is centered in the context of whatever his focal purpose and intentions were. Hitler’s original short term military aspiration was to overcome the regime of Stalin in the Soviet Union, by means of a highly c oncentrated but short war, and the lasting annexation of the Eastern European region land (Samuel, pg48). That included the Eastern side of Russia of the Urals for the objective of increasing the economic authority preferably by means of agriculture. The aspiration well articulated in the invasion of Poland, was Hitler’s primary propelling objective in the short term. However, Hitler decided on defeating France prior to taking on Stalin and his men. Hitler’s desire was to acquire a free hand to combat in the East. However, that did prove to be Hitler’s mistake. Stalin was at that time detested all throughout the Eastern and Western Europe. Therefore, Hitler would be able to mount warfare with Stalin, the only factor being Poland getting on the way due to its geographical positioning. However, the

Health Care Financial Accounting Essay Example for Free

Health Care Financial Accounting Essay It is essential in any business, not just health care to understand how finances directly affect the growth, success and longevity of the business and all its parts. To truly understand how finance affects business it is important to gain knowledge and understanding of how the business generate revenue ,the cash flow of money that comes into the business, how bills are paid and money leaves the business and how investments are made in the business that can directly and indirectly impact the financial growth of the organization. In health care organizations there are different factors that come into play in the financial department but ultimately the process of generating revenue and paying debts are the same as any other business organization. The following items will be addressed in the review of Patton-Fuller financial statements: Annual report, including Patton-Fuller financial statements and relationship between revenue sources and expenses on Patton-Fuller’s financial performance. How did the audited and unaudited financial statements differ? In general the audited reports are more formal than the unaudited reports. The audited report includes the company’s history, a CFO report, a message from the CEO, and a report of independent auditors. The audited and unaudited financial statements differ slightly in data in some areas for Patton- Fuller Community Hospital. Under the assets section in the numbers for patients accounts receivable numbers differ slightly from 2009. In 2009 on the unaudited report it provides the data of 59,787 and on the audited it has 58,787. This also leaves the total current assets and the total assets to differ slightly for 2009. On the audited report total current assets for 2009 are 127,867 and on the unaudited report it has 128,867. On the unaudited report the total assets for 2009 are 588,767 and 587,767 on the audited. Under the total liabilities calculations the retained earnings for 2009 differ slightly. The data for 2009, on the unaudited report gives 126,564 while the audited report gives  125,564. What is the effect of revenue sources on financial reporting at the hospital? The effect of revenue sources on financial reporting at the hospital are that it is variable and could adjust as the reports get audited and could change year to year. Revenue comes from a few different sources and can be located on the financial statements and reports for the year. According to the information on the balance sheet, the sources of the â€Å"Other Revenue† are third party payers of patient bills. For the income statement, the revenue is used to calculate the operating income and ultimately the net income. The Net Income value is factored into our â€Å"Statement of Owners Equity† report to give us our end of the year value for retained earnings and stockholders equity. Net patient revenue is the first and foremost source of income for Patton-Fuller Hospital. Other sources of reve nue come from borrowing monies, equity from stock or capital, and company assets. In 2008, the net patient revenue was $418,509 in the audited report. The total other revenue for 2008 accounted for $2,805 in the audited report as well. These amounts did not change from the unaudited report. The net patient revenue for 2009 was $459,900, and other revenue was $3,082 for that year. For Patton-Fuller Hospital, the income statement shows the total revenues increased by $41,668 from 2008 ($421,314) to 2009 ($462,982 Upon further reading on the reports we find that the total expenses goes over the amount of revenue the hospital is bringing in. The total expenses for 2008 were $437,424 and for 2009 it was $463,293. ). However, since expenses continued to exceed the total revenues, our net income remained a net loss in 2009 ($373). So the overall effect of the sources on the hospital is that the hospital is going in debt because they cannot match revenue with expenses as part of the GAAP (Generally Accepted Accounting Principles). How are the hospital’s revenues and expenses grouped for planning and control? The Patton Fuller Community Hospital’s statement of revenue and expense is grouped for planning and control as it is itemized out by the different types of income and expenses. Patton-Fuller Hospital groups all revenues into two categories for planning and control, the first category is net patient revenue, and the second is other revenue. Other revenue can be broken up into sub categories like revenue from assets, capital, and stock but I believe the idea of bunching them together is so it is easier to stay organized. This gives managers a clear picture as to what type of services  are receiving the most income and causing the most expenses and designed to make it easier to calculate the total net revenue from the two main sources. Expenses are broken up a little further in the financial statements; expenses are broken up by salaries and benefits, supplies, physician and professional fees, utilities, other expenses, depreciation amortization (non-cash expenses), interest, and provision for doubtful accounts. Provision for doubtful accounts would also include any changed due to being audited. These are broken up further to show where the money goes each financial period for future planning and helping to predict future expenses; this information can assist a manager in planning future budgets and in making financial adjustments to increase revenue and decrease expenses. The total expenses for 2008 were $437,424, and for 2009 they were $463,293. In 2008 the difference between the revenue the hospital brought in versus what their expenses were was $16,110. The difference in 2009 was $311 from what there revenue was verses what their expenses were. The detailed way in which the expenses are laid out allows an individual to clearly see where finances are going and highlight any warning signs that a certain department or service is costing the hospital too much and needs to be re-evaluated. Conclusion After reviewing these statements it is a clear picture that Patton-Fuller Hospital had a undeniable difference in the 2008 versus the 2009 financial statements. The numbers and financial ratios show a decrease in revenue and no improvement for the overall growth of the hospital. A good practice for the hospital’s financial managers is to regularly review the financial reports and statements to help project and plan for the differences in the audited and unaudited reports for Patton-Fuller hospital. References Apollo Group. (2013). Patton-Fuller Community Hospital Virtual Organization [Multimedia]. Retrieved from Apollo Group, HCS405-Health Care Financial Accounting website.