Use of DL-alanine methylester hydrochloride

DL-alanine methylester hydrochloride aggregate the basal assemblage of protein is a animal protein consisting of 21 amino acids. Its atomic blueprint is C3H7O2N, with α-alanine and β-alanine Two of isomers. Alanine is the basal assemblage of the architecture blocks of proteins, and is one of the 21 amino acids accomplish up the animal protein. The amino acerbic agreement of the protein atom are all L-amino acids. Due to their pH in the aforementioned environment, the altered types of amino acids answerable state, i.e., they accept altered isoelectric point (PI), which is afar by electrophoresis and chromatographic attempt of amino acids. There are α-alanine and β-alanine, alanine Two of isomers. α-alanine aswell accepted as 2 - amino acid. Sublimation aloft 200 ℃, with the altered heating bulk of about 264 ~ 296 ℃ amid decomposition. Is composed of a basic of the protein. In the case of animal diet in the non-essential amino acids. At present, abounding accustomed articles from beverage and extraction. aswell accepted as β-alanine 3 - amino acid, as achromatic crystals. Melting point 198 ℃ (decomposition), acrid in water, hardly acrid in ethanol, baffling in ether. For the amalgam of pantothenic acerbic and electroplating, are acclimated in microbiology and biochemistry research, by silk, gelatin, anatomize proteins such as zein refined, can aswell be chemically synthesized. Mainly acclimated in the aliment processing industry as a comestible supplement, additive purposes. Second, for the biologic industry. Has a acceptable flavor, can enhance the aftereffect of actinic condiment sauces; has a adapted sweetness, can advance flavor, bogus sweeteners; advance the acidity of an amoebic acerbic to advance the acidity of vinegar; accepting acidity, the alkali appetizing fast, advance pickled pickles, pickles effect, can abbreviate abating time, advance the flavor.

DL-alanine methylester hydrochloride for amalgam of acerb wine and bendable drinks antidotal agents, buffers, to anticipate bubbles wine aging, abate aggrandize smell; has antioxidant action in a array of aliment processing: such as oils, mayonnaise, bad able foods, soy dipping foods, rice bran pickled foods, etc., can be acclimated both to anticipate oxidation, but aswell advance its flavor; raw abstracts acclimated to accomplish vitamin B6, medical microbiology and biochemistry with amino acerbic metabolism. DL-alanine or amalgam of some important pesticides and biologic intermediates, medical microbiology and biochemistry of amino acerbic metabolism medication. Acclimated as a aliment additive agent, comestible supplements of vitamins B6 intermediates, augment additives, etc., can aswell be biochemical reagents. Determination: To about 80mg, attention weighing, anhydrous formic acerbic 2ml dissolved, add arctic acerb acerbic 30ml, according to potentiometric titration (Appendix Ⅶ A), titration with perchloric acerbic band-aid (0.1mol / L) titration, and titration abstracts with bare correction. Each 1ml perchloric acerbic titration band-aid (0.1mol / L) is agnate to 8.909mg of C3H7NO2. Preparation: anhydrous acerb acerbic (water agreeable calculation, per 1g of baptize additional acerb anhydride 5.22mL) 750mL, abacus perchloric acerbic (70 ~ 72%) 8.5mL, shake, let cool, add the adapted bulk of anhydrous acerb acerbic into 1000mL, agitate for 24 hours. Abstinent by the analysis simple to acetylation appropriate assurance of damp agreeable abstinent by the aqueous baptize content, baptize and acerb anhydride adapted to the aqueous baptize agreeable of 0.01% to 0.2%. Calibration: in 105 ℃ dehydration to connected weight base of potassium hydrogen phthalate about 0.16g, accurately weighed, add 20mL of anhydrous acerb acerbic to dissolve, add 1 bead of clear violet indicator solution, with the aqueous boring titrated to dejected and titration with bare correction.

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from: polypeptides