Microorganisms of interest are capable of utilizing α-imino carboxamides, in the form of the racemate or of its optically active isomers, of the general formula ##STR1## wherein A together with --NH--
HCl gas slowly evolves. The dark orange emulsion is stirred for c. 30 h at room temperature and then poured into water and extracted with toluene. The organic phase is isolated and concentrated on a rotary evaporator. The resultant oil is fractionated under vacuum to give, at 88°-92° C...
Thus,gases that react with the solvent, such as HCl(g) or SO2(g), are excluded.For mole fractions of absorbed gas less than about 0.01, the definitions all give numerical resultswithin experimental error. In reporting experimental data, especially for gases of higher solubility, it isimport...
As a class of important porous materials, metal–organic frameworks (MOFs) have outstanding characteristics including extra-high surface areas, diverse functionalities, linkers tailorability, acid and base robustness and tunable aperture17,18. Thus, they have great potentials in diverse domains such as ...
A facile method for the synthesis of 3,1-benzooxazines from N-acyl-2-(alk-2-enyl)anilines Electrophilic addition of HCl or Br2 to N-acyl-2-(alk-2-enyl)anilines is accompanied by intramolecular cyclization of these amides to give 3,1-benzooxazine... RR Gataullin,IS Afonkin,AA Fatyk...
MABr was synthesized from solutions of HBr and MA according to a literature-known procedure [51]. All syntheses were carried out under inert gas atmosphere. TEG and all solid chemicals were dried under vacuum at 65 °C for at least 24 h before being used. The liquid precursors were ...
The SHS method took a 0.5 mL vapour sample from a 22 mL vial containing 0.1 g of bitumen which is heated to 180 °C and held for 30 min before injecting the gas into a GC for separation and analysis. Using SHS, the researchers analysed sulfur containing compounds by applying a pulsed ...
One common method for preparing sodium nitrite is the reduction of sodium nitrate using sulfur dioxide gas. The reaction takes place in an acidic solution, typically using dilute sulfuric acid (H2SO4) or hydrochloric acid (HCl) to create the necessary conditions for the reaction. The ch...
This amine solution was neutralized with 1.0 N HCl. It was applied to WhatmanNo. 1 paper and chromatographed by the procedure of Bremner and Kenten (J. Biochem. 49, 651- (1951)) using a mixture of n-butanol, acetic acid and water (5/ 1/ 1 by volume) as the solvent. Several ...
It is introduced at a concentration consisting of 0.0002% to about 0.006% tetracycline HCl and / or about 0.001% to 0.003% cephalexin.[294] Typically, the fermentation batch cycle is about 80-160 hours. Thus, the Formula XIII substrate and a portion of the culture are each added typically ...