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D. P. Uniyal , S. K. Verma , Anita Chauhan

Abstract

The paper summarizes the results of ischolar_maining of juvenile cuttings of Chir Pine (Pinus roxburghii Sarg.). Cuttings emanating from 9 clones of P. roxburghii. (UPTSB-14 (Bhasla), HPSNR-5 (Nurpur), UPBER-5 (Berinag), UPKAL-10 (Kaligarh), UPPAT-I094 (Patwadangar), UPTSS-3 (Sikanderdbarl, UPDNH-770 (Dhanari), UPBER-368 (Berinag) and UPDNH-81 (Dhanari) were treated with different concentrations of IBA viz. 1000 ppm, 2000 ppm, 3000 ppm and 4000 ppm and planted in vermiculite under mist condition. Significant differences in ischolar_maining percentage and other ischolar_main parameters were observed between the clones. Among the four concentrations of IBA tried, 4000 ppm proved to be the best. 100% ischolar_maining was observed in three clones viz. UPTSB-14, UPKAL-10 and UPPAT-1094.

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Rohi Jan , V. P. Uniyal , Anita Chauhan

Abstract

Assessment of bird diversity has been conducted in different forest types (conifer, oak, mixed) and human settlement and area around Joshimath, the buffer zone of Nanda Devi Biosphere Reserve. Point count transect and line transect method were applied for bird survey. Dominance was found to be higher in conifer patch. Species evenness was found in human habitation which is in accordance with middisturbance hypothesis. Kail (Pinus wallichiana) was dominant tree-species in all the habitats. The study recorded 95 bird with the one vulnerable species Cheer Pheasant (Catreus wallichii). The study recommends for sound conservation management practices in and around the buffer area as it was a good repository of bird diversity of the entire biosphere reserve.

Keywords

Nanda Devi Biosphere Reserve, Bird Diversity, Buffer Area , Cheer Pheasant (Catreus wallichii)

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V. K. Syal ¹, Anita Chauhan ¹, Suvarcha Chauhan ¹

Affiliations
1 Deptt. of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171005, IN

Abstract

Ultrasonic velocity, viscosity and density studies on solutions of PEG's of molecular weights (8,000-11,000) and (20,000) have been carried out in water (H₂0) and its binary mixtures with Acetonitrile (AN) at 25°C. From the velocity, density and viscosity data values, various acoustical parameters namely, specific acoustic impedance (Z), adiabatic compressibilty (β), intermolecular free length (L_f), relative association (R.A.), molar sound velocity (R), Wada's constant (W), solvation number (S_n) apparent molar adiabatic compressibilty (∅_ks), viscous relaxation time (t), internal pressure (π) and free volume (V_f) have been calculated. All these parameters have been discussed separately to throw light on the polymer-polymer and polymer-solvent interactions.

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