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Kulshrestha S.,Pt Lms Government Post Graduate College | Kulshrestha S.,Dbs Post Graduate College | Awasthi A.,Pt Lms Government Post Graduate College | Dabral S.K.,Pt Lms Government Post Graduate College
Asian Journal of Chemistry | Year: 2010

The effect of ionic surfactants on the behaviour of various amines on hydrated stannic oxide impregnated silica gel thin layer chromatography was observed by employing various developing systems of different nature, with or without surfactant solutions of different concentrations. The behaviour of amines was also observed on unimpregnated thin layer chromatography for comparison purpose. Some of the important binary separations are reported.

Khare R.,CSIR - Central Electrochemical Research Institute | Khare R.,Pt Lms Government Post Graduate College | Rai H.,CSIR - Central Electrochemical Research Institute | Rai H.,Pt Lms Government Post Graduate College | And 3 more authors.
Feddes Repertorium | Year: 2011

Ophioparma ventosa (L.) Norman, belonging to family Ophioparmaceae, a rare lichen species has been recorded for the first time from north east alpine Himalaya, India after the gap of more than hundred years, when it was first recorded by Leighton from Sikkim in the year 1879. This saxicolous species is found growing together with other saxicolous lichens and mosses. This species was recorded previously from alpine regions of Eastern Nepal. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Rai H.,Pt Lms Government Post Graduate College | Rai H.,CSIR - Central Electrochemical Research Institute | Rai H.,Tribhuvan University | Khare R.,Pt Lms Government Post Graduate College | And 11 more authors.
Biodiversity and Conservation | Year: 2015

Elevation confers limitations on distribution of organisms through correlated variations in temperature, moisture, radiations and precipitation. The elevation gradients of terricolous lichen species richness in Garhwal, western Himalaya were assessed using generalized additive models, in order to compare distribution patterns of different growth-forms, photobiont types, and dominant families. A total of 148 terricolous lichen species belonging to 42 genera and 19 families were recorded. The total species richness showed unimodal relationship with elevation, where the highest species richness was observed at mid elevations (3,200 m). The species richness of lichens with green algae (chlorolichens) and of lichens with cyanobacteria (cyanolichens) also exhibited significant unimodal elevational patterns with cyanolichens peaked at somewhat lower (2,800–2,900 m) elevation than chlorolichens (3,200 m). Growth forms showed statistically significant relationship of species richness to elevation, with crustose and squamulose lichens reaching their maxima at higher elevation than foliose, fruticose and dimorphic terricolous lichens. Unimodal pattern of species richness was also followed by six dominant families, with these families reaching maximum richness at different elevations. Elevational variation in topography, climate, and competition from vascular plant communities, together with the tolerance of specific growth forms to zoo-anthropogenic pressures, shape the distribution of terricolous lichens in the Garhwal Himalaya. © 2014, Springer Science+Business Media Dordrecht.

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