Simulating Dialysis Essay Example for Free

Simulating Dialysis Essay Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? __ The molecules were to large to go through. My results matched._ 3.Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction? __The albumin was not able to go through and the glucose did. I predicted that neither of them will diffuse, however the glucose was able to go through._ ___ 4.Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. _sodium chloride, urea, glucose and albumin__ ___ ACTIVITY 2 Simulated Facilitated Diffusion 1.Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs.__ Both are passive diffusion that are from high concentration gradient to a low concentration gradient. Facilitated differs from simple because it requires a carrier protein to diffuse. _ ___ 2.The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucose transport. Explain why the rate increased. How well did the results compare with your prediction? The rate increased because there is more room and surface area increases relative to glucose. ___ 3.Explain your prediction for the effect Na+Cl− might have on glucose transport. In other words, explain why you picked the choice that you did. How well did the results compare with your prediction? _I picked the answer based on the activity. My results matched. ACTIVITY 3 Simulating Osmotic Pressure 1.Explain the effect that increasing the Na+Cl− concentration had on osmotic pressure and why it has this effect. How well did the results compare with your prediction? ___ __ Increasing the NaCl will increase the osmotic pressure because water needs to diffuse to the higher concentration gradient until equilibrium is reached_. My results were the same. 2.Describe one way in which osmosis is similar to simple diffusion and one way in which it is different. ___ _ Both are passive transports of high concentration gradient to low concentration gradient. Osmosis differs because it is the diffusion of water from a high to a low concentration gradient through a selective permeable membrane.__ 3.Solutes are sometimes measured in milliosmoles. Explain the statement, â€Å"Water chases milliosmoles.† ___ __ Osmosis is the diffusion of the solvent, e.g. water. The water in this simulation diffuses to the side of the membrane that has the highest concentration of the solutes. _ 4.The conditions were 9 mM albumin in the left beaker and 10 mM glucose in the right b eaker with the 200 MWCO membrane in place. Explain the results. How well did the results compare with your prediction? the glucose diffuses from the right beaker to the left beaker until equilibrium is reached. The albumin cannot diffuse through the membrane. My results were off. ACTIVITY 4 Simulating Filtration 1.Explain in your own words why increasing the pore size increased the filtration rate. Use an analogy to support your statement. How well did the results compare with your prediction? ___ _ This increase in pore size will increase the filtration rate because if it have more space, they will be able to pass through. If you connect a water hose to spray your grass, the water will come out faster than a device that attaches to water your grass. My results matched.__ 2.Which solute did not appear in the filtrate using any of the membranes? Explain why. ___ _ Powdered Charcoal- It was too large to pass through.__ 3.Why did increasing the pressure increase the filtration rate but not the concentration of solutes? How well did the results compare with your prediction? _ The pressure allows for more movement through the membrane but equilibrium was not reached.__My results were 50/50 ___ ACTIVITY 5 Simulating Active Transport 1.Describe the significance of using 9 mM sodium chloride inside the cell and 6 mM potassium chloride outside the cell, instead of other concentration ratios. _ the Na/K pump allows for 3:2 ratio__ ___ 2.Explain why there was no sodium transport even though ATP was present. How well did the results compare with your prediction? __ In order for the Na+/K+ pump to function, both these ions and ATP must be in place. My results were off._ 3.Explain why the addition of glucose carriers had no effect on sodium or potassium transport. How well did the results compare with your prediction? __ Glucose concentration does not affect the Na/K concentration. My results are off. 4.Do you think glucose is being actively transported or transported by facilitated diffusion in this experiment? Explain your answer. __ It is being transported by facilitated diffusion. Since glucose is a lipid insoluble and too large to pass through the membrane it requires a carrier but not ATP (no energy needed.)_ ___

A Comparison of Shakespeares Prince Hamlet and Machiavelli’s The Princ

A Comparison of Prince Hamlet and Machiavelli's The Prince  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚        Ã‚   Machiavelli states that "it is necessary for a prince, who wishes to maintain himself, to learn how not to be good, and use this knowledge and not use it, according to the necessity of the case." Machiavelli's ideas both compare and contrast to the methods used by Hamlet. Hamlet's desire to drive the king mad and eventually kill him, is what he thinks he must do in order to set things right. Hamlet struggles to maintain his position as prince. Perhaps he lacks the essential qualities of a prince outlined by Machiavelli.    According to Machiavelli, the pursuit of all things regarded as virtuous and praiseworthy will only lead to the prince's ruin. This is completely true in the case of Hamlet, because he is on a quest to avenge his father's death. The battle between good and evil is constantly in the forefront of Hamlet's mind, as he wavers between acting civil or getting revenge outright. In the beginning, Hamlet struggles to remain good at all times, but this causes him extreme anguish. Hamlet is an honest man, who grieves for his father. He suffers because of the dishonesty of the others in the court, especially his mother and his uncle, and later, Rosencrantz and Guildenstern. Hamlet is able to see through them all, and realize that they're dishonest. He speaks these words to Guildenstern: "Anything but to th' purpose. You were sent for, and there is a kind of confession in your looks, which your modesties have not craft enough to colour. I know the good King and Queen have sent for you." (Hamlet, II, ii., 278-280)    Hamlet's honesty is also seen when he is speaking with his mother. In act I, scene ii, Gertrude asks him why the de... ...e his goal was to get and retain power. He wanted to prove Claudius to be an unfit king, and he did so, but only as Hamlet himself was about to die. Hamlet had to cause grief by killing the king, but in the end, he is seen as a hero, because he unmasked his father's killer.    Sources Cited and Consulted: Gray, Terry A. "Mr. William Shakespeare and the Internet." http://www.palomar.edu/Library/shake.htm. Jones, W. T. Masters of Political Thought. Ed. Edward, McChesner, and Sait. Vol. 2. Boston: Houghton Mifflin, 1947. Lee A. Jacobus.   A World of Ideas: Essential Readings for College Writers.   5th edition. Boston, MA: Bedford/St. Martin's, 1998. Machiavelli, Niccolo. The Prince. Trans. Hill Thompson. Norwalk: The Easton Press, 1980. Shakespeare, William. The Three-Text Hamlet. Eds. Paul Bertram and Bernice Kliman. New York: AMS Press, 1991.

Nordstrom Case Study Essay

Answer 1: In the 1990s, Nordstrom had six co-presidents who were six cousins belonging to the family’s fourth generation. All six cousins took decisions jointly on major issues concerning the business. Thus, it was necessary that all six co-presidents agree on a decision or a plan for it to be acted upon. This was quite a difficult task as all of them often had differing opinions. Due to this many decisions were delayed or met with resistance by one or the other member. These six co-presidents were compared to a multi-headed hydra. Dismantling the hydra would prevent conflicts on future decisions and would also enable decisions to be taken quickly. It will also vest the ownership for the decisions onto one person. It will also enable a family member to be groomed for possibly leading the company one day. The possible disadvantages of dismantling the hydra is that the six co-presidents could have all contributed their knowledge and experience and have arrived at a better more informed decision. If equal power is vested in six people at the top, it enables them to share the workload.’ Answer 2: Creating departments around products will create independent profit and loss units for each product. The members of each department will have expertise on their products. They will know how to procure those products and effective sales and marketing techniques to sell those products better. This will narrow down their focus and they will concentrate only on the product that they are selling and will gain expertise on how to sell it best. The possible disadvantages of creating departments around products are that the employees will not have a complete picture of the entire business and where they stand. If in future, they are moved to another department, they will have to gain information about that product from scratch. Answer 3: The following changes prompted the move from mechanistic to organic organization. In the 1990s, the company met with stiff competition from its competitors. Its sales began to plateau. Its net income fell 2% and sales edged up only 1.9%. In the stores that had been open for a year, its sales dipped 1.1% after a 2.6% drop the prior year. Nordstrom’s shares fell from a 1999 high of 44 3/16 to under 20 in February. The customers and outsiders complained that top executives spent more time in seeking consensus of all co-presidents on issues and this was a reason for Nordstrom being slow in presenting new fashions for sales. Answer 4: In designing an organization to manage change, an additional structural change that Mr. Whitacre should consider is to start a competition among the departments. In this quarterly competition, the department that has the best sales and profits should be the winner and its members should be given some incentives. They should be asked to share the best practices with the other departments in order to help them manage change better. Employees should be rotated regularly from one department to another.

Relationship Between Art And The Growing Body Of Science

In this essay we would try to comprehend and understand how renaissance and post-renaissance artistic movements excelled hand in hand with the increasingly accumulating body of scientific knowledge and how the artists of the relevant periods utilized the scientific understanding in creating their artistic works and productions. Relationship between Art and the Growing Body of Science The renaissance was not just a rebirth of the classical ideals of antiquity of Greco Roman world but it inspired an unrelenting quest into the scientific realm which would ultimately lead towards the greater scientific revolution in the times to come. The artists endeavored to understand, during this time, the nature and scientific basis of things and the phenomena in order to compose vivid and realistic works that would appeal to the general masses and involve their interpretational processes in a spontaneous and natural manner. Eskridge (n.d., para. 2) rightly put it as: â€Å"Leonardo observed the world closely, studying physiology and anatomy in order to create convincing images of the human form†. The painting dynamics and proportions of linear perspective discovered through the utilization of mathematical inputs, the discovery of the printing press by Gutenberg, the leverage of the oil based organic paints in the production of art works by northern renaissance artists, the wonderful adventures of Galileo and Copernicus , the unraveled enthusiasm to discover the new worlds by Columbus, and theShow MoreRelatedRelationship Between Art And Art763 Words   |  4 Pagesperiods not only for the art flourishment but also, for the scientific knowledge growth. So, in those periods, the relationship between art and science was so clear and attractive. This essay will discuss the relationship between the arts and the growing body of scientific knowledge during the three major stylistic periods. 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