L-Threonine Fermentation. Part II

The fermentation of L-threonine, L-serine, L-cysteine and acrylic acid by a gram-negative coccus.

Optimization of fermentation conditions for the biosynthesis of L-threonine by Escherichia coli.

In this study, the fed-batch fermentation technique was applied to improve the yield of L-threonine produced by Escherichia coli TRFC. Various fermentation substrates and conditions were investigated to identify the optimal carbon source, its concentration and C/N ratio in the production of L-threonine. Sucrose was found to be the optimal initial carbon source and its optimal concentration was ...

Mammography; Part II

From the Book of Mammography by Dr. Zabihollah Arnavaz - Head of Radiology Department of Jorjani Hospital of National University of Iran.

Rat liver L-threonine dehydrogenase.

L-threonine dehydrogenase (E.C.1.1.1.103) catalyzes the NAD+-dependent transformation of Lthreonine to 2-amino 3-0x0-butyric acid, which spontaneously loses CO2 with the final production of aminoacetone ( 1) The enzyme is present in several microorganisms as well as in the liver of vertebrates (2-6). We studied some properties of the rat liver enzyme, showing that the activity was strongly inhi...

Zinc(II), Cadmium(II), Mercury(II), and Lead(II) Complexes of N-Carboxymethyl-D,L-threonine in Aqueous Solution

The formation of complexes of Zn(II), Cd(II), Hg(II), and Pb(II) and N -carboxymethylD,L-threonine (H2CMT, H2L) in aqueous solutions has been studied by spectrophotometric and potentiometric methods. The complexation model for each system has been established by the HYPERQUAD program from the potentiometric data. Three different behaviors are found: ML2H, MLH, ML, MLOH, and ML2 complexes are fo...