Determination of blood type Introduction: A blood type is a classification of blood based on the present or absence of inherited antigens substances on the surface of RBCs‚ these antigens are made by proteins‚ carbohydrates‚ and glycolipid‚ Now there are total of 8 blood type known for the international society of blood transfers ( ISBT)‚ Also 600 antigens are known for ISBT‚ Antigens are a type of protein (Y shaped) found in blood and it has a great role in the immune system to recognize any
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be used in order to determine the reaction stoichiometry Magnesium is used to react with hydrochloric acid in order to produce hydrogen gas. One of the purposes of this experiment is to determine X in the equation below The mass of the magnesium used is measured before the use in the experiment via an analytical balance. The known amount of magnesium is then reacted with excess hydrochloric acid which causes the magnesium to be the limiting agent in this particular reaction. The amount of HCl used
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Facial Feedback Kendra Verlingo PSY/355 August 13‚ 2012 Denise Wiseman Facial Feedback The facial feedback hypothesis states that the action of a person’s facial musculature is a casual agent in the subjective sensation of emotions (Deckers‚ 2005). Many psychologists agree that the free expression of the physical characteristics of emotions‚ such as smiling or frowning‚ are actually direct feedback of the emotion an individual is feeling. For example‚ a smile from a person may cause
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and industrial applications. Citric Acid is one of the organic acids commonly used as a chelating agent. It is considered an excellent chelating agent that binds metals. It is used to remove lime scale from boilers and evaporators. It can be used to soften water‚ which makes it useful in soaps and laundry detergents. By chelating the metals in hard water‚ it lets these cleaners produce foam and work better without need for water softening devices. Citric acid is the active ingredient in some bathroom
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the President’s Council on Bioethics published the ‘Controversies in the Determination of Death’. Within the publication‚ the Council discusses the various criterions that need to be met in order for death to be declared. The criterions include those of a neurological level‚ which have been observed for over three decades. Although there have recently been objections to the neurological criterion in regards to death determination‚ the Council decided to maintain the criterion. In keeping the neurological
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Is Life Expectancy More Correlated with Obesity or Poverty? Hypothesis: When obesity and poverty rates are tested to see which is more correlated with life expectancy I would expect poverty to be more correlated and for it to be a negative correlation as well. I say this because obesity is in a way a subcategory of poverty. For example‚ people who are poorer tend to buy the less healthy foods because they are at a cheaper price‚ thusly causing obesity. Procedure: Research and Identify the obesity
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sodium chloride. In my first hypothesis I stated if I added sodium chloride to distilled water‚ than the overall conductivity will become more conductive than just distilled water‚ since the sodium chloride will break down into it’s respective ions. I also noted the solution will however be less conductive compared to vinegar and HCL also encompassed in 2 grams of sodium chloride. Judging by my final results and several attempts‚ I
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1. Determine the spring constant‚ k‚ of Spring 1‚ by using Hooke’s Law. Take three different measurements (since 3 masses) and do three calculations and average your k’s to get a more accurate answer. By applying lots of friction‚ you will be able to get your mass to hang still. Show a table of your data and your calculations of k. Spring 1 with three different masses: 50 grams: Spring stretched: 5m F = 50gm * 9.8 m/s2 = 490.00 N K= 490/5m = 98 100 grams: Spring stretched: 10m F = 100gm * 9
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Recrystallization of Benzoic Acid Objective To purify benzoic acid by recrystallization and gain experience with a basic organic laboratory techniques. Background Products of chemical reactions are often contaminated with impurities. One method for purifying chemicals‚ recrystallization‚ takes advantage of the differences in the solubilities of the desired products and the impurities and the tendency for the slow formation of crystals to exclude impurities from the crystalline solid. HC HC
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B. et al.‚ 2010. The clinical use of structural MRI in Alzheimer disease. Nature Reviews Neurology‚ 6(2)‚ pp. 67-77. Hardy‚ J. A. & Higgins‚ G. A.‚ 1992. Alzheimer’s disease: the amyloid cascade hypothesis. Science‚ 256(5054)‚ p. 184. Johnson‚ K. A.‚ Fox‚ N. C.‚ Sperling‚ R. A. & Klunk‚ W. E.‚ 2012. Brain Imaging in Alzheimer Disease. Cold Spring Harbor Perspectives in Medicine‚ 2(4). Lee‚ B. C. P.‚ Mintun‚ M.‚ Buckner‚ R. L. & Morris‚ J. C.‚ 2003
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