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A new method of yield evaluation for pressure-driven membrane processes is presented in this paper. The method enables the flux to be estimated based on a simple experimental procedure. The permeate flux is determined by means of a modified surface renewal concept, instead of the commonly used film model. The main advantage of this approach is the possibility of describing the limiting flux and flux...
AbstractThe paper presents the kinetic evaluations of poly(ethyleneimine)-penicillin acylase preparations. The comparative studies show that the investigated system is much better than the native enzyme, and slightly worse than commercially available Boenringer preparation. Additionally, the high stability of PEI-enzyme system, very easy way of its preparation, high flexibility, and possibility to...
Three different enzyme preparations were investigated:native enzyme, enzyme stabilized by adding poly(ethyleneimine) and enzyme attached to acrylic carrier.The preparations were compared with regard to their storage, temparature and pH-stabilities as well as the effect of temperature and pH-value on enzyme activity.It was found that for all preparations hydrolisis was kinetically limited.Five kinetic...
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