Integrated Analysis of Turbomachinery Frame-Foundation-Soil Interaction

For the smooth functioning of turbomachines, the design of the rotor, the bearings, the supporting structure, and the foundation should be carried out as an integrated system. The frequency domain method in conjunction with FEM is chosen for the analysis. The modified influence matrix boundary condition method is applied to reduce the number of equations to be solved. Results for 4 idealized cases are compared. It is shown that the interaction effects are significant in the lowest frequency domain

N-methylpyrrolidone: Isolation and characterization of the compound from the marine sponge Clathria frondifera (class:Demospongiae)

235-238An investigation of the chemical composition of the marine sponge Clathria frondifera resulted in the isolation of the compound N-methylpyrrolidone which is widely used in the petrochemical, microelectronics fabrication, paint and pharmaceutical industry. This is the first report on the isolation and structural characterization of N-methylpyrrolidone from a marine source. The compound was purified by column chromatography and analyzed by TLC. The functional groups were analyzed by FTIR spectrum. The structure of the compound was established by spectroscopic analysis (UV, 1H and 13C NMR) and elucidated with the aid of COSY, HMQC, and HMBC experiments

Marine organisms in Indian medicine and their future prospects

139-145The marine ecosystem is a rich source of both biological and chemical diversity which has been explored in the discovery of unique chemicals, having potential for industrial development as pharmaceuticals, cosmetics, nutritional supplements, molecular probes, fine chemicals and agrochemicals. In recent years, a significant number of novel metabolites with potent pharmacological properties have been discovered from marine organisms. In the present paper various research reports on some marine organisms used in different Indian systems of medicine have been discussed for further developments