Abstract In this experiment paper chromatography was used in order to identify two unknown amino acids using eight known amino ones. The two unknown ones were identified by comparing the distance they travelled up the chromatography paper and their Rf values to the corresponding values of the other eight known amino acids. The unknown amino acids identified were Glycine and Methionine. Introduction Proteins in cells are important in many ways. There are different types of proteins such as
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neuron (Figure 3.2e). The addition of sodium chloride will increase the sodium ion concentration outside the cell membrane. The sodium channels will open allowing sodium ions to enter the cell in hopes of equilibrium (depolarization). The cell will balance this polarity and pump
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again‚ it continued to follow this trace continuously. 7. What part of the trace shows the refractory period? The atrial contraction is the part of the trace that shows the refractory period. 8. Does summation occur? No‚ summation does not occur. 9. Why is it important that summation not occur in heart muscle? Summation would increase the Heart muscle contractions which would lead to a heart attack. Activity 2: Vagus Nerve Stimulation 1. Describe the effect of the vagus nerve stimulation
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The Effects of Acid Rain on Plant Growth PURPOSE The purpose of this experiment was to determine to what degree acid rain affects the growth of certain plants. I became interested in this idea because I’m worried about our environmental conditions and it sounded very interesting to me. The information gained from this experiment may be used to as a warning to stop air pollution. HYPOTHESIS My hypothesis is that the plant watered with the acid solution will grow more slowly than plant’s
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Weak Acid Titration Abstract: Our method for determining the unknown weak acid was to determine the equilibrium constant K from the molecular weight of the weak acid from our titration data. In this lab the acid Potassium hydrogen phthalate and two unknown acids were titrated. We determined the molar mass of the Potassium hydrogen phthalate‚ for the unknown acids we calculated the molar mass and the Ka values. We used NaOH as the known base for titrating in all three of the titrations. Our
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or land improvements‚ whichever is longer. land improvements. Question 6 0 / 0.5 points Book value is Cost minus accumulated depreciation. Cost minus salvage value. An estimate of the asset’s value at the end of its useful life. Question 7 0.5 / 0.5 points Trademarks are generally shown on the balance sheet under Intangibles. Investments. Property‚ Plant‚ and Equipment. Current Assets. Question 8 0 / 0.5 points The Depreciation Expense on the Income Statement shows the amount
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Exercise 1: Cell Transport Mechanisms and Permeability Worksheet Student Name: Student ID# Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise1_JohnSmith.doc. Please make sure that your answers are typed in RED. Grading:
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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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607 amino acids‚ and the average molecular weight of a single amino acid is 135 g/mole. Which of the following will be able to diffuse through the 200 MWCO membrane? Your answer : b. both glucose and albumin Stop & Think Questions: The reason sodium chloride didn’t diffuse left to right is that Your answer : d. it needs a steeper concentration gradient to diffuse. Correct answer: c. the membrane pore size was too small. Glucose is a six-carbon sugar. Albumin is a protein with 607 amino acids. The average
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ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
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