scholarly journals Waste Utilization and Biodiesel Production by the Green MicroalgaScenedesmus obliquus

2010 ◽  
Vol 77 (1) ◽  
pp. 374-377 ◽  
Author(s):  
Shovon Mandal ◽  
Nirupama Mallick
Keyword(s):  
Fatty Acid ◽  
Saturated Fatty Acid ◽  
Waste Treatment ◽  
Scenedesmus Obliquus ◽  
Waste Utilization ◽  
Biodiesel Production ◽  
Acid Pool ◽  
Lipid Pool ◽  
Fatty Acid Pool

ABSTRACTScenedesmus obliquuswas cultivated in three types of waste discharges to couple waste treatment with biodiesel production. The lipid pool accumulation was boosted to 1.0 g liter−1against 0.1 g liter−1for the control. The waste-grownS. obliquusshowed an increase in the content of the saturated fatty acid pool, which is desirable for good-quality biodiesel.

scholarly journals Lipolysis and the Free Fatty Acid Pool in Seedlings

1964 ◽  
Vol 39 (6) ◽  
pp. 880-883 ◽  
Author(s):  
Allen J. St. Angelo ◽  
Aaron M. Altschul
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Acid Pool ◽  
Fatty Acid Pool

scholarly journals Growth and fatty acid characterization of microalgae isolated from municipal waste-treatment systems and the potential role of algal-associated bacteria in feedstock production

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1780 ◽  
Author(s):  
Kevin Stemmler ◽  
Rebecca Massimi ◽  
Andrea E. Kirkwood
Keyword(s):  
Fatty Acid ◽  
Environmental Sustainability ◽  
Municipal Wastewater ◽  
Unsaturated Fatty Acids ◽  
Waste Treatment ◽  
Commensal Bacteria ◽  
Biodiesel Production ◽  
Municipal Wastewater Treatment ◽  
Biofuel Feedstock ◽  
Feedstock Production

Much research has focused on growing microalgae for biofuel feedstock, yet there remain concerns about the feasibility of freshwater feedstock systems. To reduce cost and improve environmental sustainability, an ideal microalgal feedstock system would be fed by municipal, agricultural or industrial wastewater as a main source of water and nutrients. Nonetheless, the microalgae must also be tolerant of fluctuating wastewater quality, while still producing adequate biomass and lipid yields. To address this problem, our study focused on isolating and characterizing microalgal strains from three municipal wastewater treatment systems (two activated sludge and one aerated-stabilization basin systems) for their potential use in biofuel feedstock production. Most of the 19 isolates from wastewater grew faster than two culture collection strains under mixotrophic conditions, particularly with glucose. The fastest growing wastewater strains included the generaChlorellaandDictyochloris. The fastest growing microalgal strains were not necessarily the best lipid producers. Under photoautotrophic and mixotrophic growth conditions, single strains ofChlorellaandScenedesmuseach produced the highest lipid yields, including those most relevant to biodiesel production. A comparison of axenic and non-axenic versions of wastewater strains showed a notable effect of commensal bacteria on fatty acid composition. Strains grown with bacteria tended to produce relatively equal proportions of saturated and unsaturated fatty acids, which is an ideal lipid blend for biodiesel production. These results not only show the potential for using microalgae isolated from wastewater for growth in wastewater-fed feedstock systems, but also the important role that commensal bacteria may have in impacting the fatty acid profiles of microalgal feedstock.

Contribution of primary organic matter to the fatty acid pool in agricultural soils

2005 ◽  
Vol 37 (6) ◽  
pp. 1033-1041 ◽  
Author(s):  
Gerald Jandl ◽  
Peter Leinweber ◽  
Hans-Rolf Schulten ◽  
Klemens Ekschmitt
Keyword(s):  
Organic Matter ◽  
Fatty Acid ◽  
Agricultural Soils ◽  
Acid Pool ◽  
Fatty Acid Pool

The subcellular distribution of free fatty acids released during post-decapitative ischemia in rat cerebral cortex

1985 ◽  
Vol 63 (11) ◽  
pp. 1183-1188 ◽  
Author(s):  
R. Roy Baker ◽  
Zou Dao Loh
Keyword(s):  
Fatty Acids ◽  
Cerebral Cortex ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Free Fatty Acids ◽  
Subcellular Distribution ◽  
Phospholipase A ◽  
C Cells ◽  
Acid Pool ◽  
Fatty Acid Pool

After periods of 5 and 30 min following decapitation, rat cerebral cortices were removed and subcellular fractions were prepared. Fractions P1A (large myelin), P1B (nuclei), P1C (cells and debris), P2A (small myelin), P2B (synaptosomes), P2C (mitochondria), and P3 (microsomes) were isolated. Free fatty acid levels of 1.0 and 1.4 μmol/g tissue were found in the homogenates at the early and late times of ischemia. In the 30-min samples, P1A, P1C, and P2A had relatively high specific contents of total free fatty acids in comparison with other subfractions. At this time P2C was relatively enriched in arachidonate, P1A and P2A were enriched in palmitate, and P2B and P3 were enriched in stearate in comparison with the homogenate. P2C had the highest ratio of polyunsaturates/saturates in its free fatty acid pool. Comparing the 5- and 30-min samples, a large increase in the quantity of free fatty acids was found in fractions P1A and P2A, so that at the later time P1A + P2A contained 60 mol% of the free fatty acid in the total subfractions derived from cerebral cortex. In comparison with the homogenate, the lack of accumulation of free fatty acids in certain membranes known to possess phospholipase activities (e.g., phospholipase A2 in P2C) and the buildup of free fatty acids in P1A and P2A led to the hypothesis that free fatty acids may be migrating outwards from intracellular sites of production and accumulating in the multilamellar structure of myelin.

Chylomicron triglyceride metabolism in resting and exercising fed dogs

1982 ◽  
Vol 52 (4) ◽  
pp. 815-820 ◽  
Author(s):  
R. L. Terjung ◽  
L. Budohoski ◽  
K. Nazar ◽  
A. Kobryn ◽  
H. Kaciuba-Uscilko
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Corn Oil ◽  
Removal Rate ◽  
Moderate Intensity ◽  
Beta Oxidation ◽  
Fed State ◽  
Acid Pool ◽  
Fatty Acid Pool

The turnover of circulating triglycerides (TG) was determined in dogs during rest, following ingestion of food that included corn oil, and in the final period of a 1-h treadmill exercise of moderate intensity (72–84 m/min). In all cases the loss of [14C]TG from the plasma followed a first-order process. The fractional removal rate constant at rest was 26.5 +/- 1.9% (SE) n = 10) of the circulating pool size per minute, and it was increased slightly to 33.8 +/- 3.6% (n = 7) per minute during exercise. The uptake of plasma TG-derived fatty acids (5 min postinjection) was increased (P less than 0.05) in working muscle, whereas the TG uptake in fat tended to decrease. Further, the percent of TG-derived fatty acids found in the muscle's acylglyceride pool was less (90.0 +/- 3.6 vs. 53.5 +/- 1.8%), while that in the muscle's free fatty acid pool was greater (12.3 +/- 36.1 +/- 4.7%) in working compared with resting muscle. Thus the fourfold greater quantity of plasma TG-derived fatty acids found in the working muscle's free fatty acid pool could account for the entire increased TG uptake caused by exercise. This suggests that, in the fed state, circulating TG could represent a potential source of fatty acids for beta-oxidation in working muscle. However, the importance of plasma TG-derived fatty acids as an energy substrate during muscle use in a postprandial state has yet to be determined quantitatively.

scholarly journals Flavour development via lipolysis of milkfats: changes in free fatty acid pool

2007 ◽  
Vol 42 (8) ◽  
pp. 961-968 ◽  
Author(s):  
Mafalda A. Regado ◽  
Betina M. Cristóvão ◽  
Carla G. Moutinho ◽  
Victor M. Balcão ◽  
Raquel Aires-Barros ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Acid Pool ◽  
Fatty Acid Pool

scholarly journals Biodiesel Production by the Green Microalga Scenedesmus obliquus in a Recirculatory Aquaculture System

2012 ◽  
Vol 78 (16) ◽  
pp. 5929-5934 ◽  
Author(s):  
Shovon Mandal ◽  
Nirupama Mallick
Keyword(s):  
Waste Treatment ◽  
Scenedesmus Obliquus ◽  
Poultry Litter ◽  
International Standards ◽  
Fuel Properties ◽  
Lipid Productivity ◽  
Biodiesel Production ◽  
Content Type ◽  
Aquaculture System ◽  
Green Microalga

ABSTRACTBiodiesel production was examined withScenedesmus obliquusin a recirculatory aquaculture system with fish pond discharge and poultry litter to couple with waste treatment. Lipid productivity of 14,400 liter ha−1year−1was projected with 11 cultivation cycles per year. The fuel properties of the biodiesel produced adhered to Indian and international standards.

Fatty acid pool size in plasma lipoprotein fractions of cystic fibrosis patients

1995 ◽  
Vol 62 (6) ◽  
pp. 1268-1275 ◽  
Author(s):  
M T Clandinin ◽  
P Zuberbuhler ◽  
N E Brown ◽  
E S Kielo ◽  
Y K Goh
Keyword(s):  
Cystic Fibrosis ◽  
Fatty Acid ◽  
Plasma Lipoprotein ◽  
Pool Size ◽  
Acid Pool ◽  
Fatty Acid Pool
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