Showing papers by "University of Rajasthan published in 1978"
TL;DR: A massive dose of ascorbic acid (500 mg/100 g diet) was found to considerably neutralize the toxic effect of aldrin pollution as evidenced by 10-fold decrease in mortality and significantly lowered haematological response.
49 citations
TL;DR: Embryogenesis was induced in leaf callus of cauliflower maintained on Murashige and Skoog medium supplemented with indole-3-acetic acid and kinetin to show Precocious proliferation of superficial cells of the embryoids resulted in accessory embryoid development.
40 citations
TL;DR: In this paper, a detailed study of the Katzenberg mine in West Germany is presented, showing that the slaty cleavage fabric is represented by a variety of morphologic features, such as anastomosing thin films of layer silicates separating narrow lenses of rock matrix, the preferred dimensional orientation of flat grains of quartz, feldspar, and calcite occurring in the rock matrix bounded by layer-silicate minerals, and beardlike growth of chlorite, muscovite, and other minerals on those surfaces of quartz and other host minerals that make
Abstract: Detailed studies of the Hunsruckschiefer (Rheinisches Schiefergebirge), collected from the Katzenberg Mine, southeast of Mayen (West Germany), indicate that the slaty cleavage fabric is represented by a variety of morphologic features. These include anastomosing thin films of layer silicates separating narrow lenses of rock matrix, the preferred dimensional orientation of flat grains of quartz, feldspar, and calcite occurring in the rock matrix bounded by films of layer-silicate minerals, and beardlike growth of chlorite, muscovite, and other minerals on those surfaces of quartz and other host minerals that make a high angle with the cleavage direction. Other features that help to define cleavage in slates are “seamlike” bunches of muscovite crowded with opaque minerals in metasiltstone layers and silty dikelike bodies in metaclaystone layers. There are also some veins of quartz-chlorite-calcite parallel to the direction of cleavage.
Evidence of mobilization of silty and clayey materials along cleavage planes and the presence of silty dikes along the cleavage planes suggest that the cleavage-forming deformation began during the prelithification stage of the rocks. The deformation at this stage, besides developing seams of muscovite, also caused formation of weak anistropy by mechanical rotation of detrital micas to the planes of cleavage.
The earliest feature to develop following lithification and early diagenesis is the beardlike growth of chlorite, muscovite, and rutile on different host minerals. The layer-silicate films appeared in the rocks following growth of chlorite-muscovite porphyroblasts, in the earliest metamorphism of the rocks. It is argued that these films evolved through the development of fractures (which also pass through the chlorite-muscovite porphyroblasts), coupled with re-crystallization following Riecke's principle. Further readjustments in the rocks caused flattening of minerals like quartz, feldspar, and calcite through solution. The veins of quartz-chlorite-calcite were the last to form in the rocks.
35 citations
TL;DR: In this paper, a Mossbauer study of heat treated biotite, phlogopite and vermiculite micas is reported, and an attempt is made to interpret the spectra in terms of the structural changes due to oxidation and dehydroxylation.
31 citations
TL;DR: In this paper, the double isopropoxides are obtained by partial alcoholysis of the isopropy groups to give the corresponding double alkoxides [M[Al(OPri)4]2]n (n = 1, M =Mg; n = 2, N = Ca, Sr, and Ba) which can be isolated by vacuum distillation or sublimation.
31 citations
TL;DR: It has been observed that, although there was a death of primary spermatocytes in irradiated MPG-protected groups, quantitatively significant protection was afforded by this drug at all the 3 dose-levels studied.
Abstract: The radiosensitivity of primary spermatocytes in pachytene stage was estimated by counting the number of spermatids in the testes of control and MPG-treated mouse after exposure to 500, 1000 and 1500 R of Co60 gammarays. For this purpose, control and MPG-treated mice were killed 5 days after irradiation and countings of spermatids was made in stages I and II of the tubules. It has been observed that, although there was a death of primary spermatocytes in irradiated MPG-protected groups, quantitatively significant protection was afforded by this drug at all the 3 dose-levels studied.
30 citations
TL;DR: It is reported for the first time the occurrence ofTypha seedlings within natural stands of Typha .
30 citations
TL;DR: In this article, the occurrence of floating islands in an impoundment infested with water hyacinth is reported, and the chemical composition of the islands, the surrounding water and the bottom soil of the impoundments are given, to show that the floating islands are rich reserves of nutrients and differ considerably from their surroundings.
Abstract: The paper reports the occurrence of floating islands in an impoundment infested with water hyacinth. Data on chemical composition of the islands, the surrounding water and the bottom soil of the impoundment are given, to show that the floating islands are rich reserves of nutrients and differ considerably from their surroundings. Some comments have also been made on their development and their importance in water resource management.
19 citations
TL;DR: Tetra-coordinated Schiff base complexes of boron of the general type (OAc)2B(SB) have been synthesized by the reaction between boric acid and the Schiff base in acetic anhydride medium as mentioned in this paper.
19 citations
TL;DR: A nonlinear Schrodinger equation for ion-acoustic waves in a collision free plasma, consisting of warm ions and hot isothermal electrons, was derived using the KBM method.
16 citations
TL;DR: In this paper, the interaction between tin tetrathiolate, Sn(SR) 4 (R = Et, Bu) and acetic or propionic anhydride has been explored.
TL;DR: The drug, MPG, when administered before irradiation, increases the radioresistance of bone marrow lymphocytes of mice to gamma rays and helps in promoting fast recovery, especially when exposed to sublethal dose.
Abstract: The drug, MPG, when administered before irradiation, increases the radioresistance of bone marrow lymphocytes of mice to gamma rays and helps in promoting fast recovery, especially when exposed to sublethal dose.
TL;DR: The reaction of phenacyltriphenylarsonium bromide with aromatic primary amines provides a good method for the synthesis of 2-arylindoles and 2 -arylbenzindoles through arsenic ylide, and a range of indole and benzindole derivatives have been prepared in good yield.
TL;DR: Tetra-coordinated diacetoxy-boron Schiff base derivatives of the type (AcO)2B(SB) have been synthesized in almost quantitative yields and in a state of sufficient purity by the equimolar ratio reactions of boric acid and Schiff bases in acetic anhydride medium.
Abstract: Tetra-coordinated diacetoxy-boron Schiff base derivatives of the type (AcO)2B(SB) (where SB− is the anion of the corresponding monofunctional bidentate Schiff base, SBH) have been synthesized in almost quantitative yields and in a state of sufficient purity by the equimolar ratio reactions of boric acid and Schiff bases in acetic anhydride medium. Even on mixing the reactants in higher molar ratio only 1:1 derivatives could be isolated. On the basis of elemental analyses, molecular weight determinations and conductance measurements and infrared and proton magnetic resonance spectra, the possible structures for the resulting new derivatives have been indicated.
TL;DR: In this paper, the reaction of tin tetraacetate and tetraproprionate with β-diketones [acetylacetone, benzoyl acetone and dibenzoylmethane] has been carried out in different stoichiometric ratios in refluxing toluene or chloroform.
TL;DR: N-Methylaminothioformyl-N'-phenylhydroxylamine forms a 1:2 (metal:ligand) greenish yellow complex with cobalt(II) which has maximum absorption at 470 nm with a molar absorptivity of 1.65 x 10(4) 1.mole (-1).cm(-1).
01 Sep 1978
TL;DR: In this article, the problem of temperature distribution and heat transfer for laminar flow through two parallel porous disks of different permeability was investigated when the flow is entirely due to injection and/or suction at the two disks.
Abstract: The problem of temperature distribution and heat transfer for laminar flow through two parallel porous disks of different permeability, has been investigated when the flow is entirely due to injection and/or suction at the two disks. Viscous dissipation terms have been included in the energy equation and the injection and/or suction velocities at the two disks are assumed to be small. The boundaries are kept at constant temperatures. The variation of temperature and Nusselt numbers at the two disks has been graphically depicted for various values of the injection and suction velocities.
TL;DR: The Schiffschen Basen werden durch Kondensation der Aldehyde with den entsprechenden Aminen in Benzol oder absolutem Alkohol dargestellt as discussed by the authors.
TL;DR: Borax caused several degenerative changes in the testes of which giant cell formation, pyknosis and exfoliation are prominent, and the increased activity of phosphatases was also noticed.
Abstract: Borax was injected at a dose level of 250 mg/kg b. wt for 16 days (total dose 4 g/kg b. wt) s.c. to active adult male gerbils. Borax caused several degenerative changes in the testes, of which giant cell formation, pyknosis and exfoliation are prominent. The increased activity of phosphatases was also noticed.
TL;DR: In this paper, a search for anisotropy of Mossbauer factor ǫ in biotite single crystal is made by observing the angular variation of Mosbauer γ-absorption directed at various angles to the normal to the plane of the sheet and also by looking for the Goldanskii-Karyagin effect in the powdered specimen.
Abstract: A search for anisotropy of Mossbauer factor ƒ in biotite single crystal is made by observing the angular variation of Mossbauer γ-absorption directed at various angles to the normal to the plane of the sheet and also by looking for the Goldanskii-Karyagin effect in the powdered specimen. It is suggested that the absence of any detectable anisotropy of the ƒ-values in biotite, and indeed in other Fe containing compounds, in general, is possibly due to the large value of the ƒ-fraction. This is in contrast to tin- and rare- earth compounds where such anisotropy is detectable even at room temperatures.
Es wird die Anisotropie des Mosbauerfaktors ƒ in Biotit-Einkristallen mittels der Beobachtung der Winkelanderung der Mosbauerabsorption von γ-Strahlen, die unter verschiedenen Winkeln senkrecht zur Ebene der Plattchen gerichtet sind, sowie durch die Beobachtung des Goldanskii-Karyagin-Effects in pulverisierten Proben untersucht. Es wird angenommen, das das Fehlen jeder nachweisbaren Anisotropie des ƒ-Faktors in Biotit und tatsachlich auch in anderen Fehaltigen Verbindungen im allgemeinen wahrscheinlich durch den grosen Wert des ƒ-Anteils verursacht wird. Dies steht im Gegensatz zu Zinn- und Seltenen-Erd-Verbindungen, wo derartige Anisotropien sogar bei Zimmertemperatur nachweisbar sind.
TL;DR: In this paper, the reaction of phenacyl-triphenylarsonium bromide with aromatic diazonium salts provides a simple method for synthesizing 1,4-dihydro-1,2,4,5-tetrazines in good yield.
TL;DR: In this article, the nucleophilic addition of N-trimethylsilylakylamines, Me3SiNHR (where R = and t-Bu), and bis(trimethylamine)amine to dimethyl acetylenedicarboxylate occurs via silicon-nitrogen bond cleavage.
TL;DR: Single intraperitoneal injection of quinalphos produced several pathological changes in the testes and liver of the Indian desert gerbil, Meriones hurriane (Jerdon), which included testicular atrophy, reduction in tubular size and enlarged interstitium.
TL;DR: A number of methods of construction of four-dimensional incomplete block designs based on the symmetrical balanced incomplete block (SBIB) design v = 4t + 3 (prime power), r = 2t + 1, Λ = t are given; analyses of the designs are included as well.
Abstract: A number of methods of construction of four-dimensional incomplete block designs based on the symmetrical balanced incomplete block (SBIB) design v = 4t + 3 (prime power), r = 2t + 1, Λ = t are given; analyses of the designs are included as well. These methods of construction provide means for constructing interesting, new, and more efficient designs.