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Jodhpur, India

Arora S.,Jn iversity
Proceedings of the National Academy of Sciences India Section B - Biological Sciences | Year: 2010

The field study was undertaken in Aravalii hills, Rajasthan(India) keeping in view the liverwort colonization on mineral enriched substrates. These included sediments, bare rock surfaces, derived soil and mineral deposits. The association of P. rupestre (J. R. and G. Forst.) Steph. was recognized with weathered rocky mineral outcrops. Substrate and plant sample analysis reveals high amount of iron and calcium. The colonizers of iron haematite bearing basic substrates (pH 7.2-7.8) in Aravalli Hills are always common calcicoles. Source

Purohit P.,Jn iversity | Kumbhani S.,University of Mumbai | Shastri I.,University of Mumbai | Sharma P.K.,Jn iversity
Oxidation Communications | Year: 2010

The oxidation of several aliphatic secondary alcohols by morpholinium chlorochromate (MCC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding ketones. The reaction is first order each in MCC and the alcohols. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form: kobs = a + Z)[H+]. The oxidation of benzhydrol-α-d (PhCDOHPh) exhibited a substantial primary kinetic isotope effect (kH/kD = 5.90 at 298 K). The oxidation of 2-propanol has been studied in 19 different organic solvents. The solvent effect has been analysed using the Taft and Swain multiparametric equations. The reaction was subjected both to polar and steric effects of the substituents. A mechanism involving transfer of hydride ion from alcohol to the oxidant, via a chromate ester, has been proposed. Source

Tripthi G.,Jn iversity | Deora R.,Jn iversity | Sharma B.M.,Jn iversity
Proceedings of the National Academy of Sciences India Section B - Biological Sciences | Year: 2010

Surveys of spiders were done in different silvipasture systems of Indian desert. There were 24 genera of spiders belonging to 9 families. The representatives of Gnaphosidae family exhibited maximum (14) genera diversity. This family showed highest (50 %) composition. Lycosa sp. indicated highest diversity index (0.31). The relative tree effects (RTEs) on the population of different genera of spiders were all negative indicating positive responses to the presence of trees. Thus the interaction between spiders and trees proved beneficial and may be helpful for conservation of soil fauna in desert. Source

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