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Dharani, G.
- Production and Characterization of Antimicrobial Peptides from Bacillus subtilis Isolated from Deep-Sea Core Samples
Abstract Views :244 |
PDF Views:89
Authors
Affiliations
1 Marine Biotechnology Division, National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 Marine Biotechnology Division, National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1725-1730Abstract
A new strain of Bacillus subtilis isolated from deep-sea core sediment sample (1400 m depth) produced antimicrobial peptides (AMPs) when cultured at 50 and 100 bar pressure conditions. The minimum inhibitory concentrations (MIC) showed that the AMPs had potent activity against V. cholerae and K. pneumoniae. AMPs extracted from cells grown at ambient and elevated pressure conditions exhibited distinct antifungal and antibacterial activities. Analysis of genes encoding AMPs revealed the presence of srfAA, sbo and bmyB biosynthetic genes. GC–MS analysis confirmed substantial accumulation of unsaturated fatty acids in membrane lipids of the cells in response to elevated pressure.Keywords
Antimicrobial Peptides, Bacillus subtilis, Biosynthetic Genes, Deep-Sea Bacteria, Piezotolerance.References
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- Mass Culture of Marine Microalgae Chlorella vulgaris (NIOT-74) and Production of Biodiesel
Abstract Views :234 |
PDF Views:97
Authors
G. Dharani
1,
D. Magesh Peter
1,
J. T. Mary Leema
1,
T. S. Kumar
1,
K. Thirupathi
1,
A. Josephine
1,
R. Kirubagaran
1,
M. A. Atmanand
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1731-1738Abstract
Biodiesel production using marine microalgae as an alternate fuel source is receiving international attention in view of its economic and environmental advantages. The present study evaluated the feasibility of biodiesel production from the marine microalgae; Chlorella vulgaris (NIOT-74). Outdoor mass cultures of marine microalgae were done in different photobioreactors and raceways with marine C. vulgaris (NIOT- 74) as a model organism. The study demonstrated the feasibility of producing biodiesel and provided an evaluation of the physico-chemical properties of biodiesel (B100) and blend (B10) according to ASTM standards. A cost-effective electroflocculation method with 90.12% harvesting efficiency was developed and tested. The biodiesel produced from C. vulgaris (NIOT-74) was tested in two-stroke and four-stroke engines and was also used to test drive a vehicle.Keywords
Biodiesel, Chlorella vulgaris, Fuel Properties, Photobioreactors.References
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