摘要:
A water-soluble, biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester is disclosed. The hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester has: (i) a molecular degree of substitution of the hydroxyalkyl group of less than 1.5 (MShydroxyalkyl
摘要:
The present invention relates to a process for enzymatic hydrolysis of cyclic oligomers of poly(ethylene terephthalate), which process comprises subjecting the cyclic oligomer to the action of one or more lipolytic and/or biopolyester hydrolytic enzyme(s).
摘要:
A hyperthermostable alpha-amylase is provided by culturing strains of Pyococcus. These enzymes are of great interest for industrial applications, for example in starch liquefaction processes. The microorganisms Pyococcus woesei or Pyococcus furiosus are capable of producing the desired alpha-amylase with the following properties:(a) a pH optimum between 4.0 and 6.0;(b) a temperature optimum between 80 and 120 degrees centigrade;(c) an activity which is essentially independent of calcium ions; and(d) a residual activity of 100% after one hour at 90 degrees centigrade and of at least 80% after one hour at 100 degrees centigrade in the presence of stabilizing amounts of substrate.