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Your search keyword '"Jeevan Kumar, S. P."' showing total 20 results
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20 results on '"Jeevan Kumar, S. P."'

14. Comparative study of floral biology using detergent and confirm selfincompatibility system in protogynous lines of Indian mustard (Brassica juncea)

Author

Singh, C., Boraiah, K. M., Singh, R. K., Jeevan Kumar, S. P., Singh, G., and Ramesh Chand

Subjects
Agronomy and Crop Science
Abstract

Seven genotypes of mustard [Brassica juncea (L.) Czernj and Coss.], protogynous lines (F3-5 generation), cytoplasmic male sterility (CMS) line and different concentrations (3, 5 and 8% (w/v)) of detergent (synthetic detergent powder was used in present investigation. There is effect of detergent which induces more prominent male sterility expression in Pusa Bold followed by Ashirwad genotypes and more vigorous during floral bud initiation, resist to scorching effect and delayed in flowering. Furthermore, the floral attributes, viz. anther length (mm), no. of pollen grains/bagged flower, pollen fertility, stylar length (mm), stigma receptivity, no. of ovules and seed set (%) were highly significant and which induced 100 % male sterility. Similarly, the pollen-ovule ratio was found to be nonsignificant and the yield0/plant significantly declined with increase in detergent concentration. The PG line showed more prominent stigma exertion, extended protogynous interval (9-10 days) and stigma receptivity (3-4 days) from its protrusion compared to induced male sterile line. The expression of male sterility in PG and CMS lines showed the partial sterility (30-50%) and absolute (100%) respectively. Further, the PG line had low seed set on selfing even it produces normal pollen (pollen viability test) but it was high seed setting occurs with out-crossing hence, it was confirmed presence of self- incompatibility system in the protogynous plants.

Published
2018

19. Clinical Relevance of cagA and vacAand Association with Mucosal Findings in Helicobacter pylori-Infected Individuals from Chennai, South India

Author

Vadivel, Anand, Girish Kumar, C.P., Muthukumaran, K., Ramkumar, G., Balamurali, R., Meena, Rang Lal, Venkatasubramanian, S., Solomon, T. Rajkumar, Ganesh, P., and Jeevan Kumar, S.

Abstract

Helicobacter pyloriis associated with a spectrum of severe gastrointestinal conditions. In this study, an attempt was made to correlate endoscopic mucosal patterns with H. pyloriinfection and examine the pathogenic potential of the strains. Among the 147 dyspeptic individuals studied, 42.2% were H. pyloriinfected. Association of H. pyloriwith type 3 and 4 mucosal patterns (P= 0.001) and intestinal metaplasia (P= 0.012) was seen. vacAwas associated with histological (P= 0.014) and endoscopy findings (P= 0.009). Association of mucosal patterns with H. pyloriinfection could be useful for clinicians to decide on the need for eradication therapy.

Published
2018
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20. Enhanced lipid extraction from oleaginous yeast biomass using ultrasound assisted extraction: A greener and scalable process.

Author

Jeevan Kumar SP and Banerjee R

Subjects
Biofuels, Fatty Acids chemistry, Green Chemistry Technology, Hydrogen-Ion Concentration, Lipids chemistry, Solvents chemistry, Temperature, Time Factors, Biomass, Chemical Fractionation methods, Lipids isolation & purification, Trichosporon chemistry, Ultrasonic Waves
Abstract

Soaring demand for alternative fuels has been gaining wide interest due to depletion of conventional fuel, increasing petroleum prices and greenhouse gas emissions. Biodiesel, an alternative fuel, derived from oleaginous microbes has been promising because of short incubation time and easy to scale up. Oleaginous yeast Trichosporon sp. is capable of utilizing glycerol and agro-residues for enhanced lipid synthesis. Lipid extraction from Trichosporon sp. biomass showed highest lipid content with ultrasonic assisted extraction (43 ± 0.33%, w/w) coupled with process parameters than the conventional Soxhlet (30 ± 0.28%, w/w) and Binary solvent [choloroform:methanol, (2:1, v/v)] methods (36 ± 0.38%, w/w), respectively. The standardized process parameters of ultrasonic assisted extraction coupled with chloroform/methanol solvent system resulted 95-97% of conversion efficiency in 20 min at 30 °C with a frequency of 50 Hz and 2800 W power, respectively. Enzymatic transesterification of yeast biomass lipid obtained 85% of fatty acid methyl esters that are predominant with oleic acid methyl ester followed by palmitic and stearic acid methyl esters, respectively. These results substantiate that the ultrasonic assisted extraction is a potential green extraction technique that had reduced time, energy and solvent consumption without compromising on lipid quality. Deploying this green extraction technique could make the biodiesel production process inexpensive and eco-friendly., (Copyright © 2018 Elsevier B.V. All rights reserved.)

Published
2019
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