Showing papers by "University of Rajasthan published in 1997"
TL;DR: The extent to which this nitrogen fixation is likely to involve symbiotic nitrogen fixation, and the need for field trials is indicated to determine the extent toWhich inolculation of wheat with A. caulinodans will reduce the requirement for inputs of nitrogenous fertilizers, is indicated.
Abstract: Nitrogen fixing nodules are formed on the roots and stems of the tropical legume Sesbania rostrata by Azorhizobium caulinodans as a result of crack entry invasion of emerging lateral roots. Advantage was taken of this invasion capability of A. caulinodans to determine whether inoculation of the non–legume wheat with A. caulinodans would result in the endophytic establishment of azorhizobia within wheat roots. Advantage was also taken of the oxygen tolerance of the nitrogenase of free–living azorhizobia to assess the extent to which the endophytic establishment of azorhizobia in wheat roots would provide a niche for nitrogen fixation of benefit to the plant. Wheat was inoculated with A. caulinodans and grown in pots under controlled conditions, without added growth reglators and without addition of fixed nitrogen. Microscopic examination of the short lateral roots of inocluated wheat showed invasion of azorhizobia between cells of the cortex, within the xylem and the root meristem Acetylene reduction assays combined with analysis of tissue nitrogen levels indicated the likelihood that colonization led to nitrogenase activity. Inoculated wheat showed significant increases in dry weight and nitrogen content as compared with uninoculated controls. We discuss the extent to which this nitrogen fixation is likely to involve symbiotic nitrogen fixation, and we indicate the need for field trials to determine the extent to which inolculation of wheat with A. caulinodans will reduce the requirement for inputs of nitrogenous fertilizers.
101 citations
TL;DR: Multivariate logistic regression analysis showed that age and smoking in males and age and systolic blood pressure in females were associated with higher prevalence of Q-wave CHD, while education and prayer-habit are protective.
101 citations
TL;DR: In this article, the steady laminar flow of a second grade fluid near a rotating disk is considered and the viscoelasticity of the fluid gives rise to a boundary value problem in which the order of the differential equation is seven but there are only five boundary conditions.
43 citations
TL;DR: The results indicate that addition of higher concentrations of NH4NO3 can substitute for the growth regulator requirement in the medium for plant regeneration, in the presence and absence of NAA used as growth regulator.
38 citations
TL;DR: The ethanolic extract of the whole plant parts (root, stem leaves and pods) of Cassia italica (Mill.) Lam showed weak effect on writhing induced by acetic acid and a dose-dependent inhibition of PG release effect was observed using rat peritoneal leucocytes.
32 citations
TL;DR: In this paper, the Fourier expansion method has been employed to estimate the event plane via the anisotropy of the event as a function of centrality, and the VENUS event generator with rescattering and proper simulation of the detector response can explain only a portion of the observed anisotropic.
30 citations
TL;DR: In this paper, the effects of need for achievement and outcome on attributional style were examined, using a 2 × 2 (Need for Achievement: high vs. low x Outcome: positive vs. negative) factorial design.
Abstract: The effects of need for achievement and outcome on attributional style were examined, using a 2 × 2 (Need for Achievement: high vs. low x Outcome: positive vs. negative) factorial design. The participants were 120 adolescents studying at the Vocational and Industrial Training Institute in Sirsa, India. The participants, who were selected on the basis of extreme scores on a need for achievement scale (Achievement Values and Anxiety Inventory; Mehta, 1969), completed Feather's (1982) Attributional Style Questionnaire. The participants who had a low need for achievement attributed negative outcomes to factors that were more internal, stable, and global than those cited by the participants with a high need for achievement. Positive outcomes were attributed to more internal factors of a stable and global nature than negative outcomes were.
27 citations
TL;DR: In this article, a comparative study of the geochemical results for the granites associated with tungsten mineralization (Tungsten granites) and those which are not related with any mineralization in the same or nearby areas from Rajasthan, was undertaken.
25 citations
TL;DR: In this article, the activation energy for nonisothermal crystallization and the dimensionality of crystal growth were analyzed using the modified Kisinger's equation for the activations of crystallization.
25 citations
TL;DR: Sulfur-bonded square planar complexes of the type, [M(NSH)2]Cl2 and [M (NS)2], where, M = PdII and PtII and NSH = 2-[1-furanyl]-ethyledene]hydrazinecarbothioamide, 2]-1-(2-thienyl)-ethyledenyl)-hexyl-hexyl]-hexylhexinecar bothioamide with sulfur donor ligands have been synthesized and characterised.
Abstract: Sulfur bonded square planar complexes of the type, [M(NSH)2]Cl2 and [M(NS)2], where, M=PdII and PtII and NSH = 2-[1-furanyl)-ethyledene]hydrazinecarbothioamide, 2-[1-(2-thienyl)-ethyledene]hydrazinecarbothioamide, 2[1-(2-naphthenyl)ethyledene]-hydrazinecarbothioamide with sulfur donor ligands have been synthesised and characterised. Chemical analysis, IR, UV-visible, 1H NMR, magnetic measurements, conductance measurements and molecular weight determinations have been utilised for establishing the geometries of the free ligands and their metal complexes. The spectral data are consistent with a square planar geometry around PdII and PtII in which the ligand acts as a neutral bidentate and monoanionic bidentate ligand coordinating through nitrogen and sulfur atoms. To discuss bioinorganic aspects of the complexes, representative free ligands and their metal complexes were tested in vitro against a number of microorganisms and in vivo on male albino rats. Findings are positive.
23 citations
TL;DR: In this article, a hydrophilic polysaccharide matrix of guaran has been used for the preparation of some new chelating resins, i.e. glycine hydroxamate in guaran (GH-G), acetic acid hydroxamates in Guaran (AAH-G) and iminodiacetic acid dihydroxamate in GUaran (IDAAH)-G after its crosslinking with epichlorohydrin.
TL;DR: In vitro clonal propagation of Capparis decidua was achieved using nodal explants from mature trees, and cotyledonary node, cotYledon and hypocotyl explants taken from the seedlings, and the medium with BAP was the best for shoot bud proliferation from the nodal as well as seedling explant.
Abstract: In vitro clonal propagation of Capparis decidua was achieved using nodal explants from mature trees, and cotyledonary node, cotyledon and hypocotyl explants taken from the seedlings. Explants cultured on MS medium supplemented with BAP showed differentiation of multiple shoots and shoot buds in 4–5 weeks in the primary cultures. The medium with BAP (5 mg/l) was the best for shoot bud proliferation from the nodal as well as seedling explant. Shoot multiplication was best on cotyledonary node. In the nodal explants shoot multiplication was best on medium supplemented with 5 mg/l BAP and after second subculturing further multiplication of shoot buds was highest on the medium containing 3 mg/l BAP. Shoots were separated from mother cultures in each subculturing for rooting. Rooting was best achieved using 1 mg/l IBA in the medium. Rooted plantlets were transferred td earthen pots with garden soil and peat moss mixture.
TL;DR: In this paper, the authors describe the biodiversity in the north-western Indian State of Rajasthan, its relationship with the environment and the existing human and livestock populations, and advocate certain pragmatic conservation strategies.
TL;DR: In this paper, embryogenic callus was induced from immature embryo explants of Hordeum vulgare cv RD-57 cultured on MSB medium supplemented with Picloram (2 and 4mg I-1).
Abstract: Long term high plant regeneration was obtained from embryogenic callus induced from immature embryo explants of Hordeum vulgare cv RD-57 cultured on MSB medium supplemented with Picloram (2 and 4mg I-1). In the subsequent subcultures different types of calli were recognised which could be distinguished from each other on the basis of their morphology, growth and plant regeneration ability. Best growth and maintenance of embryogenic state of callus was achieved on MSB medium supplemented with Picloram (2 mgl-1). For plant regeneration, embryogenic callus was transferred to hormone free MSB medium. Regenerated plantlets were rooted either on hormone free MSB medium or MSB medium supplemented with IAA (0.5 mgl-1). The regenerated plants were transferred to field conditions where they matured and set seeds. Histological studies of embryogenic callus revealed all the stages of typical somatic embryogenesis. In addition, atypical somatic embryos and secondary somatic embryogenesis was also observed and occasionally de novo shoot morphogenesis was seen in the same cultures.
TL;DR: In this paper, an Assistant Professor in Human Ecology, in the Indira Gandhi Centre for Human ecology, Environment and Population Studies at the University of Rajasthan has stated that fluorine is an essential element for human growth and development, its intake in excessive amounts beyond the permissible limits can be very harmful.
TL;DR: A number of di-and triorganotin(IV) complexes of dihydrobis(1-pyrazolyl)borate and diphenylbis(1 -pyrazyll) have been synthesized.
TL;DR: In this article, a wide range of variation in corallum shape, perforation, lateral septal surface ornamentation, nature of the endotheca, and that of the columella is observed.
Abstract: r-Epistreptophyllum cornutiformis Gregory, 1900, is the name assigned to a Middle Jurassic population of scleractinian corals from Kachchh, western India. Measurements of ten variables from 84 specimens of this population have been statistically examined by means of univariate and multivariate analyses. A wide range of variation in corallum shape, septal perforation, lateral septal surface ornamentation, nature of the endotheca, and that of the columella is observed. The great majority of specimens are solitary. The wide range of gradational variation observed in this population corresponds to and includes the morphological characters described for various scleractinian genera such as Protethmos Gregory, Metethmos Gregory, Frechia Gregory, and Epistreptophyllum Milaschewitsch. The assignment of these genera to this later senior synonym genus is supported by the description of a well-preserved topotype from Nattheim. The ornamentation of the septa in Epistreptophyllum is detailed and distances it from typical pennular corals.
TL;DR: In this paper, the structural and biochemical aspects of organosilicon (IV) and organotin(IV) complexes with thio-and semicarbazide ligands having NS and NO donor systems are described with the support of elemental analysis.
Abstract: Stereochemical and biochemical aspects of organosilicon(IV) and organotin(IV) complexes with thio- and semicarbazide ligands having NS and NO donor systems are described with the support of elemental analysis, IR, 1H, 13C NMR, 29Si NMR, 119Sn NMR and 19F NMR spectroscopy. From the analysis of these studies the donor sites of ligands are located and the geometries of donor environment around the satin(IV) and silicon(IV) acceptor centres proposed. The ligands and their metal complexes are tested in vitro and in vivo by a new technique against a number of pathogenic fungal and bacterial strains and the findings are discussed.
TL;DR: Plant regeneration was achieved from coleoptile tissue of wheat from 2- to 5-d-old seedlings and cultured on Murashige and Skoog's medium supplemented with 2,4-dichlorophenoxyacetic acid and cream, friable callus was obtained.
Abstract: Plant regeneration was achieved from coleoptile tissue of wheat (Triticum aestivum L. cv. Kharachia-65). Coleoptiles (1.0 - 3.5 cm long) were excised from 2- to 5-d-old seedlings and cultured on Murashige and Skoog's (MS) medium supplemented with 2,4-dichlorophenoxyacetic acid (2,4-D - 0.5, 2.5, and 5.0 mg dm-3). Cream, friable callus was obtained after 6 weeks of inoculation. This callus was sub-cultured on MS medium supplemented with 2,4-D (2.5 mg dm-3) and 5 % coconut water. After 6 weeks of sub-culturing white, cream or pale, friable, nodular callus was obtained. Plant regeneration occurred when this callus was sub-cultured on MS medium supplemented with 0.2 mg dm-3 1-naphthalene acetic acid + 1.0 mg dm-3 6-benzylaminopurine. For rooting, regenerated shoots or plantlets were transferred on MS medium supplemented with 0.5 mg dm-3 indole-3-acetic acid. Rooted plantlets were directly transferred into pots and grown under field conditions. Seed setting invariably occurred in all plants.
Lebedev Physical Institute1, Panjab University, Chandigarh2, University of Sydney3, University of Jammu4, University of Rajasthan5, Joint Institute for Nuclear Research6, Academia Sinica7, Lund University8, University of Marburg9, University of Washington10, Slovak Academy of Sciences11, Shanxi Teachers University12, V. G. Khlopin Radium Institute13
TL;DR: In this article, the results on charged particle multiplicities, densities and fluctuations from central Pb+Pb interactions at 158 A GeV were discussed and compared with the results obtained at the same location.
TL;DR: In this article, the authors investigated two viscous fluid cosmological models in General Relativity in which the expansion is only in two directions, and the coefficient of shear viscosity is proportional to the rate of expansion in the model.
Abstract: The motivation of this paper is to investigate two viscous fluid cosmological models in General Relativity in which the expansion is only in two directions ie one of the Hubble parameters
$$(H_1 = \frac{{A_4 }}{A})$$
is zero In the first model, coefficient of shear viscosity is assumed to be constant while in the second model, the coefficient of shear viscosity is proportional to the rate of expansion in the model Here no additional condition is assumed except for coefficient of shear viscosity These models are new and different from those models obtained by Bali and Jain (1987, 1988) in which free gravitational field was assumed to be Petrov Type D and non-degenerate for Marder (1958) metric and coefficient of shear viscosity is proportional to the rate of expansion in the model The various physical and geometrical aspects of the models are also discussed
TL;DR: In this paper, the electronic structure near the Cu-O planes in the normal and superconducting states in a high-quality thin film using polarized x-ray absorption was studied to get quantitative information on changes in density and symmetry of the itinerant holes.
Abstract: We have studied the electronic structure near the Cu-O planes in the normal and superconducting states in a high-quality ${\mathrm{HgBa}}_{2}{\mathrm{Ca}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$ thick film using polarized x-ray absorption in order to get quantitative information on the changes in density and symmetry of the itinerant holes. We have observed, in our analysis of the Cu ${L}_{3}$-edge absorption spectra, an increase in the density of doping holes along the planes parallel and perperdicular to the Cu-O sheets while going from the normal to the superconducting state. Our results show that some of the holes have ${3d}_{{z}^{2}}$ symmetry and moreover their density also increases as the system goes to the superconducting state. The results have been discussed in light of the earlier published results on other cuprate superconducting systems and a probable local and short-range structural change in the ${\mathrm{CuO}}_{5}$ pyramid which may be associated with the superconducting transition.
TL;DR: In this paper, a fourth-order predictor-corrector method is developed for obtaining the numerical solution of a class of singular boundary value problems in which the highest derivative is further multiplied by a parameter which can take arbitrarily small values.
TL;DR: In this article, the results of a Compton profile study on polycrystalline platinum were reported and compared with APW calculations of Papanicolaou et al. and also with calculations based on the renormalized-free-atom (RFA) model.
Abstract: In this paper we report the results of a Compton profile study on polycrystalline platinum The measurement has been made using 241 Am γ-rays and is compared with APW calculations of Papanicolaou et al and also with our calculations based on the renormalized-free-atom (RFA) model It is seen that the incorporation of electron correlation effects improves slightly the agreement between APW theory and experiment but the best fit to our experimental data is seen for the simple RFA model for 5d 92 6S 08 configuration A comparison of the equal valence-electron-density Compton profiles of platinum and the other two isogroup metals, namely palladium and nickel, reveals an interesting trend for the d-band width in agTeement with the results based on photoemission measurements The d-band occupancy as determined from RFA analysis is in agreement with Lytle's estimates
Panjab University, Chandigarh1, University of Sydney2, Yerevan Physics Institute3, University of Jammu4, University of Rajasthan5, V. G. Khlopin Radium Institute6, Joint Institute for Nuclear Research7, Academia Sinica8, Lund University9, University of Marburg10, University of Washington11, Shanxi Teachers University12
TL;DR: In this article, the angular distribution of He fragments from Pb induced reactions on stationary Pb target at 158 A GeV/c incident momentum was reported, where the precision of the angular measurements was about ± 0.01 mrad.
TL;DR: Vitrification is a morphological and physiological disorder affecting in vitro regenerated plants and vitrified shoots of carnation regenerated from cultured cotyledons were abnormally glassy, thick and bushy with wider translucent leaves.
Abstract: Vitrification is a morphological and physiological disorder affecting in vitro regenerated plants. Vitrified shoots of carnation (Dianthus caryophyllus L.) regenerated from cultured cotyledons were abnormally glassy, thick and bushy with wider translucent leaves. Such vitrified shoots were recovered by culturing them on a medium supplemented with GA3. Differentiation of shoot buds from the cultured cotyledons of D. caryophyllus occurred on MS medium supplemented with BAP (2.0 mg/l). Shoot buds subcultured on the same medium resulted in further prolific development of shoot buds and bushy shoot growths. Key words: carnation, shoot morphogenesis, micropropagation, cotyledons vitrification.
Kurchatov Institute1, Lund University2, Utrecht University3, Variable Energy Cyclotron Centre4, University of Münster5, University of Rajasthan6, University of Tennessee7, University of Geneva8, University of Jammu9, Panjab University, Chandigarh10, Oak Ridge National Laboratory11, University of Groningen12
TL;DR: The mean transverse momentum of photons has been determined on an event by event basis in S + Au collisions at 200 A. GeV from the ratio of the measured electromagnetic transverse energy (E-T(em)) to the photon multiplicity (N-gamma) as discussed by the authors.
TL;DR: The aims of the present investigation was to confirm further occurrence of hypokalemia in the monkey (comparatively at two higher dose levels) and the role of potassium salt in preventing occurrence of gossypol-induced hypokAlemia.
TL;DR: In this article, 1H-4,5-dihydro-3-aryl-5-(2-hydroxyaryl)pyrazole with o-dibromoxylene under liquid-liquid phase transfer catalytic conditions using tetra-n-butylammonium hydrogen sulphate or [18]-crown-6 as PT catalyst, benzene/chloroform as organic phase and 50% aqueous potassium hydroxide as second phase, afforded novel 2,5,9,10-tetrahydro [7,
TL;DR: Complexes of the type [Ph4M]-[S2POGO]− (M[dbnd]Por As; G= -CMe2CH2CHMe-, CH2CMe 2CH2−, -CH2CEt2CH 2−, -CME2Cme2− and -CH 2 CH2Me-) have been synthesized by the reactions of tetraphenyl phosphonium and arsonium chloride with ammonium alkylene dithiophosphates as mentioned in this paper.
Abstract: Complexes of the type [Ph4M]+[S2POGO]− (M[dbnd]Por As; G= -CMe2CH2CHMe-, CH2CMe2CH2− , -CH2CEt2CH2− , -CMe2CMe2− and -CH2CH2CHMe-) have been synthesized by the reactions of tetraphenyl phosphonium and arsonium chloride with ammonium alkylene dithiophosphates The derivatives have been chracterized by elemental analyses, molar conductance spectroscopic (IR, 1H and 31P NMR) studies