The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For the first time, PSL-C, an immobilized lipase from Burkholderia cepacia, was successfully applied to the regioselective acylation of andrographolide by vinyl acetate in acetone. FT-IR spectra demonstrated the occurrence of acylation reaction. The 13 C NMR, ESI-MS and elemental analysis confirmed that the 14-acetylandrographolide was formed exclusively. Water activity and reaction temperature...
Lipase-catalyzed acylation of konjac glucomannan (KGM) with vinyl acetate in organic media was successfully conducted using Novozym 435 as a biocatalyst. The degree of substitution (DS) of the modified KGM was used to evaluate the extent of acylation. The influences of various factors, such as water activity (a w ), organic media, reaction temperature, shaking rate, enzyme dosage and the molecular...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.