Reference

Conversion of phenylpyruvate to L-phenylalanine by immobilized Clostridium butyricum-alanine dehydrogenase-Micrococcus luteus under hydrogen high pressure

Conversion of phenylpyruvate to L-phenylalanine by immobilized Clostridium butyricum-alanine dehydrogenase-Micrococcus luteus under hydrogen high pressure. Matsunaga, T.; Higashijima, M.; Nakatsugawa, H.; Nishimura, S.; Kitamura, T.; Tsuji, M.; Kawaguchi, T. (Dep. Appl. Chem. Resour., Tokyo Univ. Agric. Technol., Koganei 184, Japan). Appl. Microbiol. Biotechnol., 27(1), 11-14 (English) 1987. CODEN: AMBIDG. ISSN: 0175-7598. DOCUMENT TYPE: Journal CA Section: 16 (Fermentation and Bioindustrial Chemistry) Alanine was the best amino donor among various amino acids and NH4Cl for phenylalanine prodn. by M. luteus. L-Alanine was regenerated at the rate of 9.2 mmoles/min-g dry cells from NH4Cl and pyruvate by immobilized C. butyricum and alanine dehydrogenase. L-Phenylalanine was continuously produced from H2, NH4Cl, and phenylpyruvate by coupling immobilized C. butyricum, alanine dehydrogenase, and M. luteus. The rate of phenylalanine prodn. was 1.74 mmoles/min-g dry cells.

Effect of KCl and Na2SO4 on the Solubility of Glycine and DL-Alanine in Water at 298

Effect of KCl and Na2SO4 on the Solubility of Glycine and DL-Alanine in Water at 298.15 K. Ferreira, Luisa A.; Macedo, Eugenia A.; Pinho, Simao P. (Laboratory of Separation and Reaction Engineering, Departamento de Tecnologia Quimica, Campus de Santa Apolonia, Instituto Politecnico de Braganca, Braganca 5301-857, Port.). Industrial & Engineering Chemistry Research, 44(23), 8892-8898 (English) 2005 American Chemical Society. CODEN: IECRED. ISSN: 0888-5885. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Section cross-reference(s): 34, 69 The soly. of glycine and DL-alanine in aq. systems of KCl and Na2SO4 at 298.15 K was measured at different salt concns. using the anal. gravimetric method. The exptl. data obtained in this work and those previously reported in the literature for the same systems were compared, and it was possible to show a big discrepancy for the water-KCl-amino acid systems and a very satisfactory agreement for the water-Na2SO4-amino acid systems. The soly. data from this work and the activity coeffs. data from literature were used to explore the potentialities of the Pitzer-Simonson-Clegg equations for the thermodn. description of the ternary systems water-KCl with glycine or DL-alanine at 298.15 K. This model, with five adjustable parameters, gives a global root-mean-square deviation of 0.0036 for the correlation of the activity coeffs. and 0.63 g/(kg of water) for the soly. in those ternary systems.