In the present work,nonlinear interaction of elliptical laser beam with collisional plasma is studied by using paraxial ray approximation.Nonlinear differential equations for the beam width parameters of semi-major ax...In the present work,nonlinear interaction of elliptical laser beam with collisional plasma is studied by using paraxial ray approximation.Nonlinear differential equations for the beam width parameters of semi-major axis and semi-minor axis of elliptical laser beam have been set up and solved numerically to study the variation of beam width parameters with normalized distance of propagation.Effects of variation in absorption coefficient and plasma density on the beam width parameters are also analyzed.It is observed from the analysis that extent of self-focusing of beam increases with increase/decrease in plasma density/absorption coefficient.展开更多
Alkannin/shikonin(A/S)and their derivatives are naturally occurring naphthoquinones majorly found in Boraginaceae family plants.They are integral constituents of traditional Chinese medicine Zicao(roots of Lithospermu...Alkannin/shikonin(A/S)and their derivatives are naturally occurring naphthoquinones majorly found in Boraginaceae family plants.They are integral constituents of traditional Chinese medicine Zicao(roots of Lithospermum erythrorhizon).In last two decades significant increase in pharmacological investigations on alkannin/shikonin and their derivatives has been reported that resulted in discovery of their novel mechanisms in various diseases and disorders.This review throws light on recently conducted pharmacological investigations on alkannin/shikonin and their derivatives and their outputs.Various analytical aspects are also discussed and brief summary of patent applications on inventions containing alkannin/shikonin and its derivatives is also provided.展开更多
文摘In the present work,nonlinear interaction of elliptical laser beam with collisional plasma is studied by using paraxial ray approximation.Nonlinear differential equations for the beam width parameters of semi-major axis and semi-minor axis of elliptical laser beam have been set up and solved numerically to study the variation of beam width parameters with normalized distance of propagation.Effects of variation in absorption coefficient and plasma density on the beam width parameters are also analyzed.It is observed from the analysis that extent of self-focusing of beam increases with increase/decrease in plasma density/absorption coefficient.
文摘Alkannin/shikonin(A/S)and their derivatives are naturally occurring naphthoquinones majorly found in Boraginaceae family plants.They are integral constituents of traditional Chinese medicine Zicao(roots of Lithospermum erythrorhizon).In last two decades significant increase in pharmacological investigations on alkannin/shikonin and their derivatives has been reported that resulted in discovery of their novel mechanisms in various diseases and disorders.This review throws light on recently conducted pharmacological investigations on alkannin/shikonin and their derivatives and their outputs.Various analytical aspects are also discussed and brief summary of patent applications on inventions containing alkannin/shikonin and its derivatives is also provided.
