Glycosides of marine invertebrates. XVI. Cucumariogenin from glycosides of the holothurianCucumaria fraudatrix
A new genin of the holostane series has been isolated by the acid hydrolysis of the glycosidic fraction of the holothurianCucumaria fraudatrix. It has been shown that this genin is the native alycone of glycoside G1 from the same holothurian. The structure of the genin has been established as 16β-acetoxyholosta-7,24-dien-3β-ol.
Sorption of saponins on ion-exchange resins
The capacity of a number of ion-exchange resins for the saponins isolated from the seeds of the tea plant, soapwort, horse chestnut and Iberian cyclamen has been studied. IA-1 anion-exchange resin possessed the highest sorption capacity. The influence of a number of technological parameters on the capacity of the sorbent has been considered. It has been shown that increases in the diameter of the resin grain, in the rate of feed of the solution to the column, and in the concentration of alcohol in the sorbate solution lead to a fall in sorption capacity. At the same time, the type of lyophilic alcohol in the range of C1-C4 scarcely affects the capacity. In the case of impure extracts of the saponin-containing plants, the capacity of IA-1 anion-exchange resin fell by a factor of 3–4, but ion-exchange treatment of such extracts led to better results.
Data processing in microbiology: an integrated, simplified system.
A MUMPS based computer system is described for the processing of data in a microbiology laboratory. The system uses visual display units and mnemonic codes for data input. All functions are carried out within the department by the medical, technical, and clerical staff. While the system described is integrated with other user-systems in the hospital, it is readily adaptable, and portable to a stand-alone system.