Showing papers in "Journal of the Indian Institute of Science in 1979"
Journal Article•
TL;DR: In this article, the propagation characteristics of electromagnetic waves in a dielectric-lined rectangular metal waveguide have been studied and the guide wavelength at 'X', 'ku' and 'Ka' bands and cut-off frequency are reported.
Abstract: The propagation characteristics of electromagnetic waves in a dielectric-lined rectangular metal waveguide have been studied. The lining on the two side walls (E-plane) together with the air space in between them is considered as a homogeneous equivalent dielectric medium whose equivalent dielectric constant is derived by using electrostatic theory. The theoretical work is based on the fact that LSE and LSM modes can be propagated in a rectangular metal waveguide lined in the two longer sides (H-plane) by dielectric lining. Experimental verification of the guide wavelength at 'X', 'ku' and 'Ka' bands and cut-off frequency are reported.
1 citations
Journal Article•
TL;DR: In this paper, a mechanism involving bifunctional catalYsis has been proposed for amino acid catalyzed asymmetric cydization reactions on the basis of available literature data.
Abstract: Different approaches to obtain steroids in high optical purity have been discussed. Utility of syntheses from natural precursors, resolution of intermediates and selective derivatizations using chiral reagents have been highlighted. The mechanisms of different asymmetric syntheses have been reviewed. A mechanism involving bifunctional catalYsis has been proposed for amino acid catalyzed asymmetric cydization reactions on the basis of available literature data.