Heat-treated γ-glutamyltranspeptidase of Escherichia coli recovered enzymatic activity after incubation at 4 °C, while heat-treated γ-glutamyltranspeptidase of Bacillus subtilis did not. Fluorescent spectra, CD spectra, and native polyacrylamide gel electrophoresis analysis suggested that the dimer of E. coli γ-glutamyltranspeptidase was separated into protomers by heat-treatment, but was renat...

Excessive water production in the oil field is major difficulty for petroleum industry. Remedial techniques need to be applied control this excess considering health, safety, and environmental issues improve reservoir's economic productive life. In study polymer gel system comprising partially hydrolyzed polyacrylamide (PHPA) organic cross-linkers (Hydroquinone Hexamethylene tetramine) were pre...