Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 1970"
TL;DR: A detailed account of the seasonal changes in vegetational cover, rate of biomass change and production of E. crassipes in a perennial lake of Gorakhpur (U.P.) India is given.
Abstract: A detailed account of the seasonal changes in vegetational cover, rate of biomass change and production of E. crassipes, growing under natural conditions in a perennial lake (‘Ramgarh’) of Gorakhpur (U.P.) India, is given in the present paper. The observations indicate that:
18 citations
TL;DR: Seed extract of Rhyncosia asnaris which completely inhibited the infectivity of MM in vitro reduced its infectivity when sprayed on the leaves of host plants prior to inoculation or when applied as a soil drench, and was found to be stable against heat, dilution, ethyl alcohol and was partially dialysable.
Abstract: Crude leaf extract of Achyranthes aspera, Aloe barbadens, Capsicum frutescens and Carica papaya inhibit the activity of mild mosaic, distortion ringspot and ringspot viruses of papaya; Argemone mexicana and Carum copticum extracts inhibit the infectivity of DR and RS while Adenocalymna alliaceae is effective against MM only. Infectivity of all the three isolates was also inhibited by the seed extracts of Argemone mexicana, Datura fastuosa, Rhyncosia asnaris and Raphanus sativus. Seed extract of Rhyncosia asnaris which completely inhibited the infectivity of MM in vitro reduced its infectivity when sprayed on the leaves of host plants prior to inoculation or when applied as a soil drench. It was found to be stable against heat, dilution, ethyl alcohol and was partially dialysable. This seems to be of a complex nature having a protein and sugar as its components.
17 citations
TL;DR: Comparative studies were made of the effect of 3 papaya viruses on the latex and sugar contents of the fruits and the results showed that ringspot reduced the sugar content and caused a deterioration in latex quality.
Abstract: SummaryComparative studies were made of the effect of 3 papaya viruses on the latex and sugar contents of the fruits. Distortion ringspot reduced the latex and sugar contents by some 55%, as well as lowering fruit yield. Mild mosaic did not reduce yield or sugar content appreciably, but the latex content was lowered by about 25%. Ringspot reduced the sugar content by 42% and caused a deterioration in latex quality.
1 citations
TL;DR: In this paper, the degradation of polymers is investigated and it is shown that the degradation follows first-order kinetics and involves reverse depolymerization, and that the kinetic data can be correlated with mass regression rate provided the surface temperature is known.
Abstract: I the combustion of propellants, whether hybrid or solid, polymer degradation is an important step in those cases where polymers are used as fuels. Useful information about polymer degradation has accumulated only recently.However, very few comprehensive studies have been performed. Rabinovitch has developed a theory of polymer degradation based on the concept of critical fragment size. Houser has given a procedure of calculating the mass regression rate of the propellant from kinetic data on degradation.The results of the present investigation show that the degradation follows first order kinetics and involves reverse depolymerization. The kinetic data can be correlated with mass regression rate provided the surface temperature is known.
1 citations
TL;DR: In this article, the disturbances in a cylinder characterised by a visco-elasticity of general linear type, which is subjected to a magnetic field, are discussed, and the present note is an attempt to discuss the disturbances.
Abstract: The present note is an attempt to discuss the disturbances in a cylinder characterised by a visco-elasticity of general linear type, which is subjected to a magnetic field.