Abstract:
The method is essentially based on the reaction of ethylenediamine with inert supports, containing a controlled single layer of similar aldehyde groups which are moderately separated from the support surface and on the following reduction by using borohydride of the activated supports in order to eliminate the reactive additional groups which could otherwise cause secondary indesired interactions. Applications to biotechnology, specially for the purification of proteins and for the preparation of fixed protein derivatives.
Abstract:
Synthesis of semi-synthetic monobactamic or beta -lactamic antibiotics by using derivatives stabilized by various methods of penicillin G acylase from various microbial sources according to a thermodynamically controlled strategy in monophase water/cosolvent organic apolar systems, wherein the concentration of the cosolvent varies between 30 % and 90 %, the temperature between -10 DEG C and 50 DEG C, the pH between 4.5 and 8.5, with concentrations of the antibiotic nucleus between 0.5 and 875 mM and acyl donor between 0.2 mM and 1 M, with a relationship antibiotic ring/activated or free acyl donor, using a buffer between 0 and 1 M. Application to the pharmaceutical industry.