The water activities (a w ) of 13 salt hydrate pairs equilibration to occur through the gas phase. However, were determined from vapor pressure measurements; a w keeping a w constant during longer term reactions in values for a subset were also estimated from a study of which water is a reactant or
Use of salt hydrates for controlling activity of tyrosinase in organic solvents
β Scribed by Zhen Yang; Donald A. Robb
- Publisher
- Springer-Verlag
- Year
- 1993
- Tongue
- English
- Weight
- 293 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0951-208X
No coin nor oath required. For personal study only.
β¦ Synopsis
Three procedures were employed to identify salt hydrates which were efficient water donors to dry tyrosinase suspended in a substrate solution in chloroform or toluene. Three salts (Na2SOa'10HEO, Na2HPOa'12H20 and Na2CO3"10H20) were effective activators Whereas eleven others were ineffective. It was concluded that the thermodynamic water activity (aw) of the hydrate was the major determinant controlling enzyme activity.
π SIMILAR VOLUMES
## Abstract A combinatorial experimental technique was used to identify salts and salt mixtures capable of activating penicillin amidase in organic solvents for the transesterification of phenoxyacetate methyl ester with 1βpropanol. Penicillin amidase was lyophilized in the presence of various chlo