Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 1986"
TL;DR: The volatile fungitoxic fraction obtained as an essential oil was standardized by various physico-chemical properties and showed its fungicidal nature and broad range of activity at its minimum inhibitory concentration and proved more active than some prevalent synthetic fungicides and exhibited no phytotoxic effect onVigna radiata.
Abstract: On screening the leaf extracts of some higher plants for their volatile antifungal activity against the test organism Aspergillus flavus, the extract of Ocimum adscendens exhibited the strongest fungitoxicity. The leaves showed maximum, fungitoxicity as compared with other plant parts. The volatile fungitoxic fraction obtained as an essential oil was standardized by various physico-chemical properties. The oil showed its fungicidal nature and broad range of activity at its minimum inhibitory concentration. The oil was thermostable and the toxicity remained unchanged even on autoclaving and on storage for up to 360 days. Moreover, the oil proved more active than some prevalent synthetic fungicides and exhibited no phytotoxic effect onVigna radiata.
19 citations
TL;DR: In this article, the excess volumes of trichloroethylene (CHClCCl 2 ) with anisole, pyridine, quinoline and cyclohexane were measured at both 298.15 and 308.15 K. At both temperatures, and values of V E have been found to be slightly negative for CHCClCl 2 + anisoles, CHClCCL 2 + pyridine, and highly positive for CHCLCCl Cl 2 + cycloxide.
11 citations
TL;DR: In this article, the possibility of incorporation of a pyrrolopyrimidine nucleoside analog has been examined on the basis of intermolecular interaction energy studies, where both stacking and in-plane (hydrogen bonding) interactions have been considered for computing the association energy of analogous base (tubercidin) with nucleic acid bases and base pairs.
Abstract: On the basis of intermolecular interaction energy studies, the possibility of incorporation of a pyrrolopyrimidine nucleoside analog has been examined. Both stacking as well as in-plane (hydrogen bonding) interactions have been considered for computing the association energy of analogous base (tubercidin) with nucleic acid bases and base pairs. The molecular charge distribution has been computed by CNDO/2 method while the interaction energy has been computed using second-order perturbation theory. The energy values and the sites of association of the tubercidin base in the complex formation, obtained from the minimum energy configurations, have been compared with the corresponding energy values as well as the sites of association of nucleic acid bases in the transcription process. The theoretical results thus obtained have been discussed in the light of a model developed earlier, and an attempt has been made to correlate the results with the observed biological activity of tubercidin.
9 citations
TL;DR: In this article, a number of samples of copolyphosphates were prepared and characterized, and their number-average molecular weights were determined by end-group titration and intrinsic viscosities were determined in 0.035 N NaBr solution.
Abstract: A number of samples of sodium potassium (Na:K=9:1 to 3:7) and lithium potassium (Li:K=9:1 to 5:5) copolyphosphates were prepared and characterized. Their number-average molecular weights were determined by end-group titration and intrinsic viscosities were determined in 0.035 N NaBr solution. Intrinsic viscosity–molecular weight relationships according to the Mark–Houwink equation were established for each series of compounds. A highly interesting feature of the results obtained was a decrease in the value of the constant a with an increase in the mole fraction of potassium in the copolyphosphates. This is a remarkable demonstration of the dependence of a on the degree of solvation; the solubilities of both kinds of copolyphosphates were found to decrease with an increase in the proportion of potassium.
5 citations
TL;DR: The refined interaction energy method has been utilized to study the biological activity of pyrazolopyrimidine nucleoside antibiotics and the various types of bonding patterns along with the possibility of incorporation during transcription and other biomolecular recognitions are discussed.
5 citations
TL;DR: In this paper, the Runge-Kutta method was used to obtain a numerical solution of the problem of magnetogasdynamic shock waves propagating in a medium of increasing density.
Abstract: Magnetogasdynamic shock waves propagating in a medium of increasing density are discussed. The shock travels in a dense atmosphere. We have used the Runge-Kutta method to obtain a numerical solution of the problem. The distribution of flow variables behind the shock are shown by graphs.
2 citations
TL;DR: The spectral behavior of the radiation emitted by a charged particle executing the motion of a general anharmonic oscillator under the influence of damping forces is investigated in this article, where the presence of many maxima is noticed which are in general not symmetric, in the intensity distribution as a function of frequency due to presence of anharmonics terms.
Abstract: The spectral behaviour is investigated of the radiation emitted by a charged particle executing the motion of a general anharmonic oscillator under the influence of damping forces. The presence of many maxima is noticed which are in general not symmetric, in the intensity distribution as a function of frequency due to the presence of anharmonic terms.
Das spektrale Verhalten der Strahlung, das von einem Teilchen emittiert wird, das eine schwach gedampfte anharmonische Bewegung ausfuhrt, wird untersucht. Es werden viele Maxima beobachtet, die im allgemeinen eine unsymmetrische Intensitatsverteilung als Funktion der Frequenz haben, was auf die anharmonischen Terme zuruckzufuhren ist.
2 citations
TL;DR: A tar spot fungus, Paraaoria himalayana gen. et sp.nov.
Abstract: A tar spot fungus, Paraaoria himalayana gen et spnov (Coelomycetes) is described, illustrated and compared with related genera It occurs on living leaves of Citrus sp causing hypertrophy of tissues, and was collected from the Kathmandu valley, Nepal
2 citations
Journal Article•
1 citations
TL;DR: In this paper, the dithiocarbamato complexes of titanyl(IV), zirconyl(IV) and hafnyl (IV) were prepared in aqueous medium and characterized by elemental analyses, magnetic susceptibility measurements and IR spectral studies.
Abstract: The dithiocarbamato complexes of titanyl(IV), zirconyl(IV) and hafnyl(IV), abbreviated as MO(S2CNRR)2·nH2O(M=Ti, Zr or Hf,R=H,R′=C5H9;R=H,R′=C7H11,n=1 for Ti andn=2 for Zr and Hf), were prepared in aqueous medium and characterized by elemental analyses, magnetic susceptibility measurements and IR spectral studies. The thermal behaviour of these compounds under non-isothermal conditions was investigated by thermogravimetric, derivative thermogravimetric and differential scanning calorimctric techniques in nitrogen and oxygen atmospheres. The intermediates obtained at the end of various thermal decomposition steps were identified on the basis of analyses and IR spectral studies. Kinetic parameters, such as apparent activation energy and order of reaction, were determined by the graphical method of Coats and Redfern. The heats of reaction for the different decomposition steps were calculated from the DSC curves.
1 citations
TL;DR: In this paper, a steady linearized flow of a conducting fluid withn non-equilibrium processes in parallel has been considered and neglecting the effects due to viscosity, heat conduction and diffusion and assuming the electrical conductivity to be infinite.
Abstract: A steady, linearized flow of a conducting fluid withn non-equilibrium processes in parallel has been considered and neglecting the effects due to viscosity, heat conduction and diffusion and assuming the electrical conductivity to be infinite, a single equation for the flow variables has been derived when the undisturbed uniform magnetic field is aligned to the undisturbed uniform fluid stream. The solution of the equation has been obtained for a flow over a two-dimensional wavy wall. The pressure, net pressure i.e. the difference between the local static, pressure and force per unit area arising from the surface current, drag coefficient and total drag coefficient have been calculated and the results have been discussed. It is found that for certain values of the equilibrium Mach number and the magnetic pressure number negative drag coefficient as well as negative total drag coefficient occur in the flow.
TL;DR: This book discusses the history and present situation of dematiaceous hyphomycetes, a large number of which have never been seen before in the wild, in what is believed to be the first publication of its kind.
Abstract: (1986). Goosiella, A New Pteridicolous, Helicosporous Hyphomycete Genus From Madhya Pradesh, India. Mycologia: Vol. 78, No. 3, pp. 496-500.
TL;DR: In this paper, a similarity solution for the flow variables behind a radiation-driven magnetohydrodynamic shock wave has been obtained, where it is assumed that the total energy contained behind the shock surface is increasing.
Abstract: A similarity solution for the flow variables behind a radiation-driven magnetohydrodynamic shock wave has been obtained. Owing to absorption of radiation incident on the shock layer, it is assumed that the total energy contained behind the shock surface is increasing. The ambient medium in which shock wave moves is non-uniform and it is optically thin so that there is no interaction with the incident radiation. A comparison has been made between the results with and without the magnetic field when the density and azimuthal magnetic field distributions are variable.