K.S.Kumaret.al reported the synthesis of isoxazolines from newly substituted chalcone by reaction with hydroxylamine hydrochloride . J.T. Desaiet al.  reported the ecofriendly synthesis of isoxazoline moiety containing bridge at 2 º amine and also
Suzuki and onishi were the first to inform propanediol as being an entity to produce yeast. Ten years afterwards, Bacteroides ruminicola was cited as manufacturer of this diol by Turner and Robertson. They, both deliberated the metabolism and growth of b. ruminicola defer grown on rhamnose, where it has been observed experimentally that rhamnose has mainly fermented to 1,2-propanediol, xylose and arabinose. A path of straight
Verna Wang Hannah Palmer CHEM 101-069 Lab 11-19-16 Stoichiometry and Limiting Reagents Lab Report Purpose: We are using the reaction of sodium hydroxide and calcium chloride to illustrate stoichiometry by demonstrating proportions needed to cause a reaction to take place. Background: Just like a recipe would call for a specific amount of one ingredient to a specific amount of another, stoichiometry is the same exact method for calculating moles in a chemical reaction. Sometimes, we may not have enough of or too much of one ingredient , which would be defined as limiting and excess reagent, respectively. Ideally, every mole of each reagent would be used up, and theoretical yield, we are assuming that every last mole of the reactants would
Kean began this new section of the book by diving into describing the antiseptic properties of oligodynamic (self-sterilizing) elements in chapter 10. The atoms in an oligodynamic element absorb most of the bacteria, making the metal more sterile. One of the most prominent oligodynamic elements is silver. The author was able to explain the antibacterial properties of this element through telling historical tales and stories. For example, Kean spoke of how astronomer Tycho Brahe lost part of his nose and got a replacement silver one to curtail infections.
Michael Bent Mohamed Mire CHEM 220-12 4/13/2016 Methyl Benzoate Labs The first part of the lab regarded an esterification leading to the formation of Methyl Benzoate (C8H8O2). The purpose of this lab was to convert benzoic acid to methyl benzoate by means of utilizing a reflux acid catalyzed reaction with methanol; purity of the final product was assessed by means of both proton and carbon NMR. The extent to which a reaction’s products are reverted back into the original reactants is denoted by the equilibrium constant. The esterification reaction that's taking place in this lab has a low equilibrium constant (about 2.3) which means that a very low yield of the methyl benzoate product would be generated. There are a couple of mechanisms that
They are then passed from molecule to molecule until they reach an electron acceptor at the reaction centre where NADPH and ATP are produced, they are consumed by a light-dependant process that uses CO2 to form carbohydrates. Phillipe Barbier, a french chemist in the nineteenth century, discovered a way to produce a small amount of dimethyl heptanol by reacting methyl iodide, magnesium and methyl heptanone together under anhydrous conditions. Following his discovery, his student, Victor Grignard found out that by performing a reaction in different steps will produce a higher yield. The Grignard Reagent which can be reacted with a range of carbonyl-containing compounds to form an alcohol can be produced by reacting alkyl halide and magnesium using dry ether as a
The color change indicates that carbonic acid was formed from the reaction of water and carbon dioxide, a byproduct of metabolization. These results accept the hypothesis: if yeast can metabolize, then the bromothymol blue solution should turn yellow from the production of carbon dioxide. Only the bromothymol blue solution with yeast turned yellow, suggesting that the yeast caused the color change. The yeast consumed sugar, produced
Linus Pauling played an important role in the pioneering in chemistry. In matter of fact he received a Nobel Prize in 1954 and also in 1962. The Nobel Prize in 1962 was for the development of quantum mechanics during the 1920s. His Nobel Prize in 1954 was for his research in nature of the chemical bond and its application to the elucidation of the structure of the complex substance . Linus Pauling was born in Portland, Oregon.
Abstract In this experiment, the reaction kinetics of the hydrolysis of t-butyl chloride, (CH3)3CCl, was studied. The experiment was to determine the rate constant of the reaction, as well as the effects of solvent composition on the rate of reaction. A 50/50 V/V isopropanol/water solvent mixture was prepared and 1cm3 of (CH3)3CCl was added. At specific instances, aliquots of the reaction mixture were withdrawn and quenched with acetone. In addition, phenolphthalein was added as an indicator.
Lactic acid is produced by two methods i.e, chemical method and fermentation method. Chemical method utilizes petrochemical resources followed by addition of HCN and specific catalyst to produce lactic acid . While fermentation methods utilizes renewable resources such as carbohydrate in a fermented broth to obtain lactic acid . Optical purity of lactic acid is very important and hense is major addressed problem in production of PLA. Chemical method produces racemic mixture of both D(-) and L(+) lactic acid while fermentation methods produces only one optically pure form of D(-) or L(+) lactic acid