Systematics of some beta-transitionsBrahmavar, S.; Ramaswamy, M.
doi: 10.1007/BF03049024pmid: N/A
0+ excited states of even-even nuclei can arise in several ways. In order to throw some light on the mechanism of excitation of these states, the log (ft) values for beta-transitions to the 0+ excited state and the 0+ ground state of even-even nuclei have been compared. In this analysis both allowed and forbidden beta-transitions have been considered. This survey is similar to that of beta-transitions by M. Sakai. Results of the present analysis are presented and compared to that of Sakai.
Search for physiologically active compoundsKurduker, Rajeshwar; Rao, N.
doi: 10.1007/BF03049025pmid: N/A
The condensation of resorcinol and 4-chloro resorcinol with chloro-and nitro-substitutedβ-resorcylic acids, has yielded the corresponding tetrahydroxy benzophenones, which with the exception of those containing nitro groups, could be cyclised to the respective 3:6-dihydroxy xanthones. In the case of condensations with orcinol, however, 1:6-dihydroxy xanthones could be directly isolated. A number of halo and nitro derivatives of 3:6-dihydroxy xanthone have also been prepared by direct halogenation and nitration of the xanthone, as well as by substitution in the intermediate benzophenone and subsequent cyclisation.
Differential thermal analysis of hydrothermal alteration products from the vempalle limestone belt, Cuddapah formationsRao, C.
doi: 10.1007/BF03049026pmid: N/A
In the Vempalle limestone belt, steatite and asbestos resulted due to hydrothermal alteration. The altered rocks, finally giving rise to these two end-products, are distinctly different from one another. Samples of the altered rocks from Singanaguttapalle asbestos and steatite zones and Mutchukota steatite zone were subjected to differential thermal analysis. Altered rocks from Singanaguttapalle asbestos and steatite zones contain serpentine, but the latter are partially altered, whereas the former are completely altered. Altered rocks from Mutchukota steatite zone contain chlorite but not serpentine. It is concluded from the results that in asbestos mineralization, the intermediate alteration products are serpentines and that the matrix of chrysotile fibre is essentially chrysotile variety of serpentine. In the steatite mineralization, the alteration products may be serpentine or chlorite. Initial composition and the nature of structural disturbance accompanying the intrusion of basic magma are supposed to determine the nature of the intermediate alteration products in the case of steatite.