E P Schokker

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HPLC size exclusion chromatography experiments showed that during inactivation at 40-70 degrees C of the extracellular proteinase from Pseudomonas fluorescens 22F small molecular mass fragments were formed, indicating that autoproteolysis was at least one of the major causes of inactivation. The formation of small molecular mass fragments and the reaction(More)
Calcium-induced flocculation of caseinate-stabilized soybean oil-in-water emulsions in conditions of Couette flow was studied. A concentrated emulsion (20% oil, 0.5-2.0% sodium caseinate in 20 mM imidazole, pH 7) was diluted 20 times in buffer containing concentrations of CaCl(2) between 9 and 17 mM and sheared at rates between 335 and 1340 s(-)(1). The(More)
The influence of pH, calcium ion activity, protein, and enzyme purification on the kinetics of heat inactivation of the extracellular proteinase from Pseudomonas fluorescens 22F was studied in the temperature range 80-120 degrees C. At pH 5.5-8.6 the rate of inactivation increased slightly with increasing pH values. The pH dependence of inactivation(More)
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