Abstract A buffer is a solution that resists changes in pH when H+‚ OH-‚ or H20 is added. By using standard lab equipment‚ a lab pro diagnostic tool‚ and acidic and basic solutions‚ the pH can be found. By recording the pH while adding a base or an acid gradually to a buffer solution you can find the capacity of each buffer to resist drastic changes in pH. The best buffers will keep a solution from becoming either too acidic or basic with the addition of a strong base or acid. Introduction The
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determine technique accuracy in calculating the actual concentration of an acetaminophen elixir. Five standard solutions of acetaminophen and an acid buffer solution were created and analyzed with a potentiostat to determine the peak anodic voltage and current during the scanning process. Three solutions of Tylenol®—containing acetaminophen—and acid buffer were then created and scanned at the same scan rate as the five standard solutions. Additionally‚ the most concentrated standard solution was scanned
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because they contain starch. The optimum pH for pancreatic amylase is the pH of 7. In the experiment I have used buffer solutions with the pHs of 2.8‚ 4 and 6.5. I have also used iodine and starch. Normally‚ iodine is orange-yellow‚ however when you add starch to it‚ the solution will turn blue-black. Aim: The aim for this experiment is to investigate how the different buffer solutions work on the enzyme amylase. This will be investigated by using iodine and by timing the experiment using
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FACTORS AFFECTING THE LYTIC ACTIVITY OF LYSOZYME ’ A. N. SMOLELIS" AND S. E. HARTSELL Laboratories of Bacteriology‚ Department of Biological Sciences‚ Purdue Univer8ity‚ Lafayette‚ Indiana Received for publication October 28‚ 1951 Since the initial discovery of lysozyme by Fleming (1922)‚ nuimerous attempts have been made to describe the properties of this enzyme. The absence of a reliable method for the determination of enzymatic activity‚ however‚ has contributed to the incompleteness and
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3/14/13 [Rights Issue] Jarawa Tribes‚ Human Safari‚ Buffer Area‚ Tribal Commission‚ 13th Schedule « Mrunal [Rights Issue] Jarawa Tribes‚ Human Safari‚ Buffer Area‚ Tribal Commission‚ 13th Schedule Who are the Jawaras? What is Andaman Trunk Road (ATR)? Human Safari? Road: To shut or Not to Shut? Dancing Video controversy Buffer Zone Case Chronology Tribal Commissions Mock Questions Who are the Jawaras? They are tribal people living in the South Andaman islands. (approx. just 400 of them
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First‚ the pH probes were calibrated using buffer solutions with known pH values of 4.01 ± 0.01 and 7.00 ± 0.01. First‚ the pH probes were placed in the 4.01 buffer and the probe was calibrated‚ then rinsed with distilled water‚ placed into the 7.00 buffer‚ and calibrated again. The pH probe was very close in its measurements‚ as the 4.01 ± 0.01 buffer was measured to have a pH of 4.01 ± 0.01‚ and the 7.00 ± 0.01 buffer was measured to have a pH of 6.87 ± 0.01. After the calibration
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Biochem. J. (1995) 305‚ 17-20 (Printed in Great Britain) 17 RESEARCH COMMUNICATION The effect of low temperatures Nicole MORE‚ Roy M. DANIEL* and Helen H. PETACH on enzyme activity Thermophile Research Unit‚ University of Waikato‚ Private Bag 3105‚ Hamilton 2001‚ New Zealand The stability of two enzymes from extreme thermophiles (glutamate dehydrogenase from Thermococcales strain ANI and f‚- enzymes‚ glucosidase from Caldocellum saccharolyticum expressed in Escherichia
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Experiment 1: "A cis to trans conversion" Saturday‚ June 25‚ 2005 4:19 PM Notes on Theory • Alkenes o They are hydrocarbons with a C=C double bond • Double bonds are stronger and more reactive than single bonds o Hydrocarbons with double bonds used to be known as "olefins"‚ because they had an oily appearance • "Oleum" means oil • "Ficare" means make • Isomers o Geometric isomers have the same molecular formula‚ but a different geometric arrangement • They also have different physical properties
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What is the percent ionization of the acid in Problem #14? a) 100% b) 8.5% c) 0.11% d) 0.0011% e) 0.08% 16. What is the pH of a 0.20 M aqueous solution of the base methylamine‚ CH3NH2? Kb = 5.0 x 10-4. a) 2.0 b) 12.0 c) 16.0 d) 10.0 e) 0.01 17. A buffer solution is prepared by the
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Joanne Kathleen Saori T. Suzuki‚ Laurent Santos‚ Val Justin D.M. Tongco* College of Science‚ University of Santo Tomas‚ Manila Philippines Abstract Salivary amylase‚ found in humans‚ is enzyme that catalyzes the hydrolysis of starch into simpler compounds. Its enzymatic activity is affected by several factors‚ such as temperature and pH. The rates of enzymatic activity of salivary amylase in different temperatures and pH were measured and resulted to be very near 50 C and 7 respectively. However
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