Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 1987"
TL;DR: In this article, the formation and characterization of cholesterol liquid membranes is discussed. But the authors focus on the degradation of the resistivity of the substrate films due to the accumulation of cholesterol moieties in the interfacial region.
30 citations
TL;DR: In this paper, an exact similarity solution for a spherical magnetogasdynamic shock is obtained in the case when radiation energy, radiation pressure and radiative heat flux are important, and the total energy of the shock wave increase with time.
Abstract: An exact similarity solution for a spherical magnetogasdynamic shock is obtained in the case when radiation energy, radiation pressure and radiative heat flux are important. The total energy of the shock wave increase with time. We have shown that due to the magnetic field the flow variables are considerably changed. Also, due to increases in radiation pressure number the radiation flux is increased.
24 citations
TL;DR: It is suggested that inhibition of germination is caused by reduced synthesis of amylase which is not mediated through gibberelic acid.
Abstract: Certain aspects of selective toxicity of 1,3,7-trimethylxanthine (1,3,7-T), a natural herbicide, were studied inPhaseolus mungo andAmaranthus spinosus. Treatment of seeds ofA. spinosus with 1,3,7-T (sub-lethal concentration) caused a marked decrease (29.5%) in amylase activity. Kinetic studies with respect to substrate saturation and Km values as well asin vitro treatments of the cell-free enzyme indicated no effect on its catalytic property. The inhibitory effect of 1,3,7-T on amylase activity could not be counteracted with treatments of GA3. A general biochemical analysis revealed that the starch/sugar ratio increased in the seedlings grown from treated seeds. Analysis also showed a higher ratio for insoluble/soluble nitrogen. It is suggested that inhibition of germination is caused by reduced synthesis of amylase which is not mediated through gibberelic acid. Treatment of seeds ofPhaseolus mungo with, 1,3,7-T. caused no change in amylase activity,in vivo nitrate reductase activity, ethanol soluble and insoluble nitrogen and protein content.
23 citations
TL;DR: In this paper, a series of complexes of types [La(DAPCH)X2]X and [La (DAPTC)X 2]X have been synthesized and characterized by elemental analyses, conductance measurements and IR spectral data.
21 citations
TL;DR: In this paper, the photoelectroactivity of polycrystalline zinc selenide films prepared by electrochemical codeposition in zinc sulphate solutions of different concentrations containing theI−/I2 redox couple has been investigated.
Abstract: The photoelectroactivity of polycrystalline zinc selenide films prepared by electrochemical codeposition in zinc sulphate solutions of different concentrations containing theI−/I2 redox couple has been investigated. Measured photopotentials, photocurrents and the initial rate of build-up of photopotentials indicate a significant enhancement in photoelectro-convertibility with increase in concentration, in spite of practically no change in the flat band potentials. The photoelectroactivity of ap-n heterojunction photoelectrochemical cell using cadmium selenide along with zinc selenide has also been studied.
19 citations
TL;DR: In this article, a cholesterol liquid membrane has been described using hydrodynamically and electroosmotically driven volumetric flux data employing sodium chloride and magnesium chloride solutions of different concentrations.
16 citations
TL;DR: In this article, an octahedral geometry has been established for all the ruthenium(III) complexes except [Ru(L″)Cl2]n, which is pentacoordinate and a trigonal-bipyramidal environment, D3h, has been suggested for the RIT ion.
Abstract: Ruthenium(III) complexes of types [Ru(L)3], [Ru(L′)Cl(H2O)2], [Ru(L″)Cl2]n, [Ru(L‴)Cl(H2O)]n(LH =Schiff bases derived from anthranilic acid and benzaldehyde, acetophenone, vanillin, cinnamaldehyde orm-hydroxyacetophenone; L′H2=Schiff bases derived from anthranilic acid and salicylaldehyde oro-hydroxyacetophenone; L″H=Schiff bases derived fromp-aminobenzoic acid and benzaldehyde, acetophenone, vanillin, cinnamaldehyde orm-hydroxyacetophenone; L‴H2=Schiff bases derived fromp-aminobenzoic acid and salicylaldehyde oro-hydroxyacetophenone) have been synthesized and characterized on the basis of elemental analyses, conductance, magnetic moment and spectral (electronic, i.r. and1H n.m.r.) data. The wavelengths of the principal electronic absorption peaks have been accounted for quantitatively in terms of crystal field theory and various parameters have been evaluated. On the basis of the electronic spectra, an octahedral geometry has been established for all these complexes except [Ru(L″)Cl2]n. The complexes [Ru(L″)Cl2]n are pentacoordinate and a trigonal-bipyramidal environment, D3h, is suggested for the ruthenium(III) ion. The thermal behaviour of these complexes has also been studied by t.g., d.t.g and d.s.c techniques. Heats of reaction for the decomposition steps were calculated from the d.s.c. curves. The antifungal and antiviral activities of the complexes with Schiff bases derived from anthranilic acid were also investigated.
16 citations
TL;DR: Pseudocercospora combretacearum sp.nov., Phaeoisariopsis clematidis sp., Sarcinella quercina sp., and Stenella rhododendri sp., collected on living leaves of Terminalia chebula, Clematis gauriana, Quercus dilatata and Rhododendron campanulatum respectively from the Himalayan foothills of Northern Uttar Pradesh are described, illustrated and compared with allied species as mentioned in this paper.
Abstract: Pseudocercospora combretacearum sp.nov., Phaeoisariopsis clematidis sp.nov., Sarcinella quercina sp.nov. and Stenella rhododendri sp.nov., collected on living leaves of Terminalia chebula, Clematis gauriana, Quercus dilatata and Rhododendron campanulatum respectively from the Himalayan foothills of Northern Uttar Pradesh are described, illustrated and compared with allied species.
14 citations
TL;DR: In this paper, a review of coherent states, its application to various problems in physics, chemistry and biology and its important applications to anharmonic, time-dependent and damped oscillator system is presented.
Abstract: The present review deals with coherent states, its application to various problems in physics, chemistry and biology and its important applications to anharmonic, time-dependent and damped oscillator systems. It is seen that use of these states overcomes certain theoretical difficulties.
7 citations
TL;DR: In this paper, the photoelectroactivity of polycrystalline zinc selenide films prepared by electrochemical codeposition in zinc sulphate solutions of different concentrations containing the l−/l2 redox couple has been investigated.
Abstract: The photoelectroactivity of polycrystalline zinc selenide films prepared by electrochemical codeposition in zinc sulphate solutions of different concentrations containing the l−/l2 redox couple has been investigated. Measured photopotentials, photocurrents and the initial rate of build-up of photopotentials indicate a significant enhancement in photoelectro-convertibility with increase in concentration, in spite of practically no change in the flat band potentials. The photoelectroactivity of a p-n heterojunction photoelectrochemical cell using cadmium selenide along with zinc selenide has also been studied.
6 citations
TL;DR: Agarwalomyces indicus gen. et sp.nov.
Abstract: Agarwalomyces indicus gen. et sp.nov., collected on living fruits of an unidentified member of the Lythraceae from U.P., India is described, illustrated and compared with allied genera.
TL;DR: In this article, the reflection of a plane shock wave is studied in order to achieve a high pressure and temperature state by a reflected shock wave, and the plane geometry and solve the one-dimensional, time-dependent system of hyperbolic equations by Rusanov's method.
Abstract: In the present work the reflection of a plane shock wave is studied in order to achieve a high pressure and temperature state by a reflected shock wave. We consider the plane geometry and solve the one-dimensional, time-dependent system of hyperbolic equations by Rusanov's method.
TL;DR: In this article, the results of viscosity measurements on several samples of lithium-potassium copolyphosphates (Li:K ratio ranging from 9:1 to 5:5) in salt-free aqueous solutions and in theta solvents are reported.
Abstract: The results of viscosity measurements on several samples of lithium-potassium copolyphosphates (Li:K ratio ranging from 9:1 to 5:5) in salt-free aqueous solutions and in theta solvents are reported. Molecular weights determined by end-group titration ranged from 4000–10000. In aqueous solutions the Fuoss equation parameter A was found to be nearly proportional to the square of molecular weights, indicating rod-like structures of the poly-ions at infinite dilution. The concentrations of NaBr solutions acting as theta solvents at 35°C were determined for all cases and the viscosity data in θ-solvents were utilized in calculating unperturbed dimensions which were found to lie in the range 4.7×10−7 cm to 7.4×10−7 cm.
TL;DR: In this paper, the kinetics of oxidation of ethyldigol by vanadium(V) in aqueous acidic medium has been carried out and a probable reaction mechanism is proposed.
Abstract: The kinetics of oxidation of ethyldigol by vanadium(V) in aqueous acidic medium has been carried out. The reaction is first order with respect to vanadium(V) and the substrate and is acid catalysed.Hammett acidity function (H0) andBunnett hypothesis have been applied. The formation of free radicals during the course of the reaction has been indicated. A probable reaction mechanism is proposed.
TL;DR: In this article, a system of 2m damped coupled nonlinear oscillators is considered when the nonlinear and coupling terms are of homogeneous even power 4p in position variables, and a convenient canonical transformation to remove the damping term from the equation of motion and action and angle variables in Hamilton-Jacobi theory is obtained.
Abstract: A system of 2m damped coupled nonlinear oscillators is considered when the nonlinear and coupling terms are of homogeneous even power 4p in position variables. Using a convenient canonical transformation to remove the damping term from the equation of motion and action and angle variables in Hamilton-Jacobi theory, first order corrected frequencies are obtained. The expression for the corrected frequencies bears all the characteristic features of a damped coupled nonlinear oscillator system.
Ein System von 2m gedampften gekoppelten Oszillatoren wird untersucht, dessen Kopplungsterme homogen von der Ordnung 4p in den Lagevariabeln sind. Mittels einer passenden kanonischen Transformation wird der Dampfungsterm aus der Bewegungsgleichung und den Wirkungs- und Winkelvariabeln entfernt, und Korrekturen erster Ordnung fur die Frequenzen werden erhalten. Der Ausdruck fur die korrigierten Frequenzen zeigt alle charakteristischen Zuge eines Systems gedampfter nichtlinearer Oszillatoren.
TL;DR: Ten samples of fennel seed from fields in India were examined for the presence ofaflatoxins B1, B2, G1 and G2 and one nonfluorescent sample contained detectable aflatoxin B1 after 12 months of storage.
Abstract: Ten samples of fennel seed from fields in India were examined for the presence ofaflatoxins B1, B2, G1 and G2. Five of the samples were fluorescent or became fluorescent during a 12 month storage period. Only aflatoxins B1, B2 and G1 were identified. One nonfluorescent sample contained detectable aflatoxin B1 after 12 months of storage.
TL;DR: In this article, the absorption properties of very thin films of Sn, In and Ni embedded in a dielectric medium were investigated and the total absorptance was found to be in the range 0.78-0.82.