Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Propagation of magnetogasdynamic shock waves in a self-gravitating gas with exponentially varying density

Abstract: Non-similarity solutions are obtained for one-dimensional adiabatic flow behind a magnetogasdynamic spherical (or cylindrical) shock wave propagating in a self-gravitating perfect gas in the presence of a constant azimuthal magnetic field. The density of the gas is assumed to be varying and obeying an exponential law. The shock wave moves with variable velocity, and the total energy of the wave is non-constant and varies with time. The effects of variation of the Alfven-Mach number and time are obtained. It is investigated that the presence of gravitational field reduces the effects of the magnetic field. Also, the presence of gravitational field increases the compressibility of the medium, due to which it is compressed and therefore the distance between the inner contact surface and the shock surface is reduced. A comparison between the solutions in the cases of the gravitating and the non-gravitating medium with or without magnetic field is made. The solutions are applicable for arbitrary values of time.

Transmission studies on an indian isolate of sugarcane mosaic potyvirus

Abstract: An Indian isolate of sugarcane mosaic virus was found easily transmitted by mechanical sap inoculation to sugarcane and sorghum plants. Out of different methods tried for mechanical inoculation, Bain’s and Matz’s method gave maximum per cent of infection in inoculated sugarcane and three varieties ofSorghum vulgare (cv. M.P.cherry, CSH-5 and CSH-9). The virus was also found to be transmitted by four aphids, viz.Aphis gossypii, Longiunguis sacchari, Myzus persicae andRophalosiphum maidis. Since the virus could be transmitted most efficiently byR. maidis the detailed study was made with it to establish the virus-vector relationship.R. maidis could acquire virus without any pre-acquisition fasting, but fasting has beneficial effect up to 4h on the acquisition power. In case, fasting is increased beyond 4 h, the efficiency of transmission decreased. The aphid acquire the virus within 30 sec. However, optimum acquisition feeding was obtained in 2 min. but the maximum infection was obtained after 30 min infection feeding of test plants. Even a single viruliferous aphid was enough to initiate the infection. The transmission per cent decreased when the aphids were fasted after acquisition feeding of 2h from 60 to 13 per cent. In serial transfers, the aphids cease to be infective very soon while feeding on the test plants. Thus the virus under study was transmitted apparently by typically non-persistent manner and was stylet borne.

A comparison of crystallographic and DFT optimized geometries on two taxane diterpenoids and docking studies with phospholipase A2

Abstract: Structure optimization of two taxane diterpenoids I and II has been carried out using GAUSSIAN03 program with B3LYP/6-31G** basis set. The structures were fully optimized without any geometric constraints. Coordinates found in crystallographic study were used as input to the GAUSSIAN. The results show that the conformations of taxoid cores are almost same as were observed from crystallography, while the conformations of the substituents are slightly different. Thus, taxoid cores are robust enough to maintain their conformations in gaseous state while the conformations of substituents may vary depending upon the reaction condition. To understand the mode of binding, the docking studies of both compounds have been carried out with Russell’s viper phospholipase A2 (vPLA2) as target using induced fit docking. The docking results show that regarding the interactions and energy for indomethacin binding with vPLA2, compound I shows the best results.