摘要:
Arylalkanoic acids are produced by biotransformation using suitable microorganisms and, in particular, (S)-ketoprofen in greater than 95% purity from racemic ketoprofen ethyl ester.
摘要:
Phosphoenolpyruvate carboxylase (PEPC) characterized by a specific activity of at least 40 units/mg; and/or by no more than 50% loss of activity after 60 days in 167 mM Tricine/HCl buffer, pH 8.0, and 15 mM MgCl.sub.2 ; and/or, at pH 6.5, an activity of at least 40% relative to the activity at optimum pH is disclosed. Such enzymatic activity can be obtained from serine pathway methylotrophs such as Hyphomicorbium, and is very suitable for use in measuring bicarbonate in biological samples.
摘要:
The disclosure describes a method for producing lactic acid from carbohydrate-containing media by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.
摘要:
The invention provides a method for producing lactic acid by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.