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Bhubaneshwar, India

Puhan P.,Bjb College | Thirunavoukkarasu M.,CSIR - Regional Research Laboratory
African Journal of Biotechnology | Year: 2011

Cotyledon segments from in vitro seedlings of Aegle marmelos were cultured on Murashige and Skoog (MS) medium supplemented with different concentration and combination of growth regulators. Highest regenerative response was observed in the medium containing 1.5 mg/l BA + 0.2 mg/l IAA in which 80% of the explant produced shootlets. After 2 sub-cultures in the same media composition, the shoot bud clusters that developed from cotyledon segments had started elongation of shootlets to a reasonable length of 3 -5 cm. Elongated shoots could be rooted onto half-strength MS medium supplemented with 4 mg/l IBA with 0.2% activated charcoal. © 2011 Academic Journals. Source

Raj B.K.,Government of Odisha | Pradhan B.,Bjb College | Rout G.C.,Physics Enclave
Solid State Communications | Year: 2015

We report a model study of the phonon response due to the interplay of the superconducting (SC) gap, both static and dynamic Jahn-Teller (DJT) distortions and predict the appearance of the Jahn-Teller (JT) distorted SC excitation peaks in the Raman spectra of high-Tc superconductors. The static JT and s-wave type SC interactions in the conduction band are introduced in this model. The phonons are coupled to the conduction electron density as well as to the JT split conduction bands giving rise to DJT interaction, which is the main objective of this communication. The phonons are considered in a harmonic approximation. The phonon Green's function and hence the phonon self-energy arising due to normal electron-phonon (EP) interaction and DJT interaction are calculated using Zubarev's technique. The phonon self-energy is calculated from the electron response function in the coexistence phase of the two order parameters. Two excitation peaks due to the SC gap and the JT distortion are predicted by phonon density. The evolution of these excitation peaks is investigated by varying different model parameters of the system. © 2015 Elsevier Ltd. All rights reserved. Source

Moharatha D.,Institute of Physics, Bhubaneswar | Roy G.S.,Bjb College | Dash U.N.,Siksha O' Anusandhan University
Advanced Science Letters | Year: 2014

Viscosity and density values of solutions of potassium ferricyanide and potassium ferrocyanide in chitosan solutions of different compositions have been determined at different temperatures ranging from 298.15 K to 313.15 K at an interval of 5 K. Partial molar volume, V 0 Φ is evaluated from apparent molar volume, V Φ. These data have been used to estimate partial molar volumes of transfer ΔV 0 Φ, tr for potassium ferricyanide and potassium ferrocyanide. The viscosity data at various concentrations and at different temperatures have been analysed by the Jone's Dole equation. The nature of solute-solvent and solute-solute interactions have been discussed. The structure breaking and structure making effects of the salts have also been discussed. © 2014 American Scientific Publishers All rights reserved. Source

Sarangi P.K.,Orissa University of Agriculture and Technology | Sarangi P.K.,Central Agricultural University | Sahoo H.P.,Bjb College | Das M.,Orissa University of Agriculture and Technology
Journal of Pure and Applied Microbiology | Year: 2014

A study was carried out on the population study of Staphylococcus aureus with different carbon sources during the course of ferulic acid catabolism The treatments in the study involved ferulic acid (FA), ferulic acid + glucose (FAG) and ferulic acid + biosludge (FAB) during catabolism process towards production of vanillin. Results revealed that S. aureus consumed ferulic acid rapidly with more than 4-fold increased accumulation of vanillin (45.7 mg/l) on day 2 in FAG treatment, whereas 9.8 mg/l of vanillin accumulation was found on day 7 in FA treatment. FAB treatment gave an intermediate effect on day 4 with vanillin accumulation of 22.8 mg/l. The population of bacteria in FAG medium was highest followed by FAB medium. In FA treatment, their population was lowest among all conditions. Hence, as per the production of vanillin and bacterial population, the treatments can be ranked as FAG > FAB > FA. Source

Palu A.,Utkal University | Palu A.,University of Colorado at Denver | Swain M.M.,Orissa University of Agriculture and Technology | Rath S.,Bjb College
Herpetological Bulletin | Year: 2010

This growth and demographie study of the Fail-throated Lizard Sitana ponticeriana was conducted from 2001-2003 in a tropical environment at Balukhand-Konark Wildlife Sanctuary, Orissa, India. A total of 216 hours (9 hrs/day) of observation were made and 2612 (mean 217.66 ± 88.95) lizards were studied. The size structure between the demographic size classes such as juveniles, subadults and adults changed between the wet (rainy and winter) and dry (summer) seasons. Lizards exhibited a maximum 58-60 mm of SVL. Regression relationships were expressed as linear regression equations and revealed that males were slightly larger than females. Hatchlings were observed in the field between early July and mid-November. For three demographic size classes growth rates varied with season i.e., faster in wet season than dry season. There was no significant sexual dimorphism in growth rate. Lizards reached sexual maturity within a year. On average, die subadult and adult sex-ratio was close lo 1:1 ; however, the data for each group indicated that there was greater abundance of males in the population during the dry than the wet season. Our results indicate that, like other lizard species, growth and demographic characteristics of S. ponticeriana populations fluctuate with the proximate seasons of a tropical environment in natural habitats. Source

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