Chitosan was reacted with four concentrations (2.5, 5, 10 and 20 mmol) of glutamic acid resulting in four types of glutamic-chitosan hydrogels (GCs), the activity of the resulted compounds on the removal of copper(II) and nickel(II) from wastewater were tested. The results indicated that by increasing glutamic acid concentration from GCs-1 to GCs-4, the efficiency of removing Cu(II) and Ni(II) ...

In continuation of previous studies, the intraarterial fusion of L-glutamic acid for 24 hr was found to oppose the decrease in acetylcholinesterase and butyrylcholinesterase in the superior cervical ganglion of the cat that otherwise occurs 48 hr after preganglionic denervation. The combination of glutamic acid and gamma-aminobutyric acid, in concentrations that were inactive individually, like...

In previous papers of this series, experimental conditions have been described which will enable the following processes to be studied in washed suspensions of Staphylococcus aureus (Micrococcus pyogenes var. aureus): internal accumulation of free glutamic acid (Gale, 1947 a, b), extracellular accumulation of peptides containing glutamic acid (Gale & Van Halteren, 1951), accumulation of combine...

Inhibition of microbial growth by compounds closely related to essential metabolites has been demonstrated by many investigators (l-3). Early workers (4-7) showed that inhibitory effects of single amino acids could be reversed by altering the concentration of structurally related amino acids. Gladstone (8), using Bacillus anthracis, showed such a relationship among leucine, valine, and isoleuci...

L-Glutamic acid (L-GA), a seaweed ingredient, identified in 1908 by Japanese scientists responsible for enhancing flavor for food is now best known scientifically as monosodium glutamate (MSG). The sodium salt of glutamic acid (GA) is called as MSG. The other names include – S-(+)-GA, L-GA, 2aminoglutaric acid, and an anionic form of MSG at physiological pH known as glutamate. MSG, a derivative...

GluB is a substrate-binding protein (SBP) which participates in the uptake of glutamic acid in Corynebacterium glutamicum, a Gram-positive bacterium. It is part of an ATP-binding cassette (ABC) transporter system. Together with the transmembrane proteins GluC and GluD and the cytoplasmic protein GluA, which couples the hydrolysis of ATP to the translocation of glutamate, they form a highly acti...

An investigation was carried out on the effect of some amino acids on the growth and production of Lglutamic acid by a mutant Micrococcus glutamicus AB100 using selected suitable synthetic medium. It was observed that among different amino acids studied, l-alanine, l-arginine, l-threonine, l-tryptophan, l-proline and l-hitidine had positive effect; l-leucine, l-valine, l-phenylalanine, l-serine...

Three glutamic-acid-producing coryneform strains were isolated from soil and vegetable samples. Chemotaxonomic investigations indicated that these strains belonged to the genus Corynebacterium. Phylogenetic studies, based on 16S rDNA analysis, demonstrated that the three strains formed a distinct cluster within the genus Corynebacterium and that their nearest relatives were Corynebacterium glut...

CBA and C57 mice were tested for their ability to make an immune response to a related series of branched, multichain synthetic polypeptide antigens in which the antigenic determinants on the amino termini of the branched side chains were systematically varied. Neither strain responded to the polyglutamic acid determinant. Both strains responded well and equally to the poly(phenylalanine, gluta...

A new and completely diastereoselective method for the introduction of fluorine into a noncarbohydrate sugar ring precursor has been developed. The use of N-fluorodibenzenesulfonimide (5) for the electrophilic fluorination of chiral lactone 4, which is derived from L-glutamic acid, yields the key intermediate 6. This is transformed into an anomeric acetate 8 and is used for the synthesis of a n...