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Supriya, G.
- Lipid Composition in Microalgal Community under Laboratory and Outdoor Conditions
Abstract Views :385 |
PDF Views:114
Authors
Affiliations
1 Energy & Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560012, IN
1 Energy & Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560012, IN
Source
Indian Journal of Science and Technology, Vol 4, No 11 (2011), Pagination: 1488-1494Abstract
Microalgae are the most sought after sources for biofuel production due to their capacity to utilize carbon and synthesize it into high density liquid. Current energy crisis have put microalgae under scanner for economical production of biodiesel. Modifications like physiological stress and genetic variation is done to increase the lipid yield of the microalgae. A study was conducted using a microalgal consortium for a period of 15 days to evaluate the feasibility of algal biomass from laboratory as well as outdoor culture conditions. Native algal strains were isolated from a tropical freshwater lake. Preliminary growth studies indicated the relationship between the nitrates and phosphates to the community structure through the days. The lipid profile done using Gas chromatography - Mass spectrometry, revealed the profile of the algal community. Resource competition led to isolation of algae, aided in the lipid profile of a single alga. However, further studies on the application of the mixed population are required to make this consortium approach economically viable for producing algae biofuels.Keywords
Microalgae, Biofuel, Outdoor Microcosm, Gas Chromatography - Mass SpectroscopyFull Text
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- MENCA experiment aboard India’s Mars Orbiter Mission
Abstract Views :216 |
PDF Views:86
Authors
Anil Bhardwaj
1,
S. V. Mohankumar
1,
Tirtha Pratim Das
1,
P. Pradeepkumar
1,
P. Sreelatha
1,
B. Sundar
1,
Amarnath Nandi
1,
Dinakar Prasad Vajja
1,
M. B. Dhanya
1,
Neha Naik
1,
G. Supriya
1,
R. Satheesh Thampi
1,
G. Padma Padmanabhan
1,
Vipin K. Yadav
1,
A. V. Aliyas
1
Affiliations
1 Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695 022, IN
1 Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 109, No 6 (2015), Pagination: 1106-1113Abstract
The Mars Exospheric Neutral Composition Analyser (MENCA) aboard the Indian Mars Orbiter Mission (MOM) is a quadrupole mass spectrometer-based experiment. Making use of the highly elliptical and low inclination (~150°) orbit of MOM, MENCA will conduct in situ measurements of the composition and radial distribution of the Martian neutral exosphere in the 1–300 amu mass range in the equatorial and low latitudes of Mars. The functionality of MENCA has been tested during the Earth-bound and heliocentric phases of MOM before its operation in the Martian orbit. This article describes the scientific objectives, instrument details, design and development, test and evaluation, and calibration of the MENCA instrument.Keywords
Exosphere, Mars Orbiter, mass spectrometer, thermal escape.Full Text
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- Optimal Extraction of Lipids from Microalgae, Microcystis
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PDF Views:0
Authors
Affiliations
1 Energy and Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore-560 012, IN
1 Energy and Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore-560 012, IN
Source
Nature Environment and Pollution Technology, Vol 11, No 2 (2012), Pagination: 213-218Abstract
The triacylglycerol (TAG) was extracted from Microcystis sp. using a mixture of chloroform and methanol (2:1). The fatty acid methyl ester compositions for each method were identified using gas chromatography-mass spectroscopy (GC-MS). Techniques such as sonication, bead beating, sonication-hexane solvent, sonication-supercritical nitrogen, supercritical nitrogen-manual, bead beating-hexane solvent and bead beating-supercritical nitrogen were explored to determine the most rapid and efficient cell disruption. Sonication, bead beating and manual methods showed 30.2%, 41.88% and 11.21% overall average dissimilarity respectively. Hierarchical cluster analysis of the fatty acid composition obtained from different methods show four clusters for sonication and three clusters for bead beating. Sonication for a period of 60 minutes yielded higher quantity of fatty acids evident from higher quantity of palmitic acid (53.89%) with sonication of 30 minutes and higher stearic acid (56.27%) when the cells were disrupted through sonication for 60 minutes. This highlights that sonication of 60 minutes is effective for disruption of microalgae Microcystis cells and extraction of lipids.Keywords
Microcystis, Extraction of Lipids, Biodiesel.Full Text