5. Answer the following questions.a. Write the name and structure of the product obtained by thereaction of B-D-glucopyranose with acetic anhydride in thepresence of pyridine at 0 °C? (water or ether)b. Which solvent, water or ether, would you prefer to purify thestarting material?c. Which solvent is preferred for the purification andrecrystallization of the final product from the reaction.

Glucose is hexose sugar that forms a pyranose ring structure in solution. It is an aldose sugar…

Answered: 5. Answer the following questions. a.…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Identify Atenolol functional groups that contribute to the solubility
Case Study: Case Study: Catalase Activity Catalase H,O, 0 + O2 (2) Catalase is an enzyme that converts hydrogen peroxide (H,O) to oxygen and water. An experiment investigated the effect of temperature on the rate of the catalase reaction Small (10 cm) test tubes were used for the reactions, each containing 0.5 cm of enzyme and 4 cm of hydrogen peroxide. Reaction rates were assessed at four temperatures (10°C, 20°C, 30'C. and 60 C). For each temperature, there were two reaction tubes (e.g. tubes 1 and 2 were both kept at 10°C). The height of oxygen bubbles present after one minute of 10°C 20°C 30°C 60°C Height of охудen bubbles 4 cm H,02+ 0.5 cm erzyme reaction was used as a measure of the reaction rate: a laster reaction rate produced more bubbles. The entire experiment, involving eight tubes, was repeated on two separate days. Tubes Tubes Tubes 1 & 2 Tubes 3 & 4 5 & 6 7 & 8 1. What is the purpose of this experiment? inrestrgatee effect of demperalure on the rate ot he 2. Write a…
Most of the following conclusions regarding the photo shown above are correct Except: All of the following are correct regarding the disk diffusion test photos EXCEPT : Zone of inhibition Chlorine Chlorine Chlorine O-phenylphenol Hexachlorophene O-phenylphenol Hexachlorophene Hexachlorophene O-phenylpheno Quat Quat Quat Staphylococcus aureus (gram-positive) Escherichia coli Pseudomonas aeruginosa (gram-negative) (gram-negative) Select one: O to. Gram negative bacteria are the most sensitive to chemical agents O b. Only one of the four chemicals affected Pseudomonas O c. Gram positive bacteria are the most sensitive to disinfectants O d. Hexachlorophene was effective only against Gram positive bacteria. O and. Chlorine was effective against all bacteria bacteria tested
PLEASE SHOW ALL DETAILED WORK
01. Electrophilic aromatic substitution of benzene will not proceed without Lewis acid catalyst. Give the reagent (including catalyst) and the product for the following reactions of benzene. a. nitration b. chlorination c. alkylation d. acylation e. sulfonation 02. Show the Friedel-Crafts acylation reaction of anisole and nitrobenzene with acetic anhydride? Explain the different products formed. 03. What is the basis in the separation of the components of a mixture in chromatography? 04. Describe in detail the five basic steps in the thin layer chromatographic (TLC) separation. 05. What is the difference between Rf value and retention time (RT)? 06. The chromatogram represents the separation of the components of a mixture after development. Calculate the Rf values of the three components of sample X in the chromatogram. If the SP is silica gel C-18, which is the polar component and the nonpolar component? nchot
3
Identify the catalyst that acts on the boxed structure
N-(2-hydroxyethyl)piperazine-N'-(2-ethanesulfonic A purified protein is in a Hepes acid) buffer at pH 7 with 375 mM NaCl. A dialysis membrane tube holds a 2.0 mL sample of the protein solution. The sample tube floats in a beaker containing 1.00 L of the same Hepes buffer, but with 0 mM NaCl, for dialysis. Small molecules and ions (such as Na+, Cl-, and Hepes) can to diffuse across the dialysis membrane, but the protein cannot. Assume there are no sample volume changes during the dialysis. Calculate the final concentration of NaCl in the protein sample once the dialysis has come to equilibrium. Calculate the final NaCl concentration in the 2.0 mL protein sample after dialysis in 150 mL of the same Hepes buffer, with 0 mM NaCl, twice in succession. [NaCl] after a single dialysis: [NaCl] after a double dialysis: mM mM
In biomaterial production experiments;Why we use glutaraldehyde? What can we use instead of glutaraldehyde?What are the applications of hydrogels and cryogels ?What is the main difference between the two isoterms?Why safranin use as the sample dye?
What kind of catalysis is cysteine driving in this picture? S Los i fy R……—NHR N-H---S O. N-H H-N H-N. O Metal catalysis Covalent catalysis Base catalysis O Acid catalysis NHR²
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