The Experts below are selected from a list of 384 Experts worldwide ranked by ideXlab platform
Michele S Stanley - One of the best experts on this subject based on the ideXlab platform.
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effects of temperature and nutrient regimes on biomass and lipid production by six oleaginous microalgae in batch culture employing a two phase cultivation strategy
Bioresource Technology, 2013Co-Authors: Michael Y Roleda, Stephen P Slocombe, Raymond J G Leakey, Elanor M Bell, Michele S StanleyAbstract:Abstract Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana , Odontella aurita , Nannochloropsis oculata , Isochrysis galbana , Chromulina ochromonoides , and Dunaliella tertiolecta , were cultivated under a matrix of two temperatures (10 and 20 °C) and two nutrient regimes (deplete and replete). For all species, a strong negative correlation between growth rate and lipid content was observed. Multiple stressors have no additive effect on lipid accumulation. Total oil content (fatty acid methyl esters, FAMEs, pg cell −1 ) was increased more by nutrient limitation than by temperature stress. In response to nutrient stress, N. oculata emerged as the most robust species with an increase in lipid accumulation of up to three to four-fold compared to the accumulation under nutrient sufficient conditions. Although stress conditions led to reduced fatty acid unsaturation in most taxa due to increased triacylglycerol (TAG) production, a high proportion of eicosapentaenoic acid (EPA) was maintained in O. aurita .
Michael Y Roleda - One of the best experts on this subject based on the ideXlab platform.
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effects of temperature and nutrient regimes on biomass and lipid production by six oleaginous microalgae in batch culture employing a two phase cultivation strategy
Bioresource Technology, 2013Co-Authors: Michael Y Roleda, Stephen P Slocombe, Raymond J G Leakey, Elanor M Bell, Michele S StanleyAbstract:Abstract Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana , Odontella aurita , Nannochloropsis oculata , Isochrysis galbana , Chromulina ochromonoides , and Dunaliella tertiolecta , were cultivated under a matrix of two temperatures (10 and 20 °C) and two nutrient regimes (deplete and replete). For all species, a strong negative correlation between growth rate and lipid content was observed. Multiple stressors have no additive effect on lipid accumulation. Total oil content (fatty acid methyl esters, FAMEs, pg cell −1 ) was increased more by nutrient limitation than by temperature stress. In response to nutrient stress, N. oculata emerged as the most robust species with an increase in lipid accumulation of up to three to four-fold compared to the accumulation under nutrient sufficient conditions. Although stress conditions led to reduced fatty acid unsaturation in most taxa due to increased triacylglycerol (TAG) production, a high proportion of eicosapentaenoic acid (EPA) was maintained in O. aurita .
Presentación Carrillo - One of the best experts on this subject based on the ideXlab platform.
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Mixotrophic trade-off under warming and UVR in a marine and a freshwater alga.
Journal of phycology, 2019Co-Authors: Juan Manuel González-olalla, Juan Manuel Medina-sánchez, Presentación CarrilloAbstract:Mixotrophic protists combine phagotrophy and phototrophy within a single cell. Greater phagotrophic activity could reinforce the bypass of carbon (C) flux through the bacteria-mixotroph link and thus lead to a more efficient transfer of C and other nutrients to the top of the trophic web. Determining how foreseeable changes in temperature and UVR affect mixotrophic trade-offs in favor of one or the other nutritional strategy, along the mixotrophic gradient, is key to understanding the fate of carbon and mineral nutrients in the aquatic ecosystem. Our two main hypotheses were: (i) that increased warming and UVR will divert metabolism toward phagotrophy, and (ii) that the magnitude of this shift will vary according to the organism's position along the mixotrophic gradient. To test these hypotheses, we used two protists (Isochrysis galbana and Chromulina sp.) located in different positions on the mixotrophic gradient, subjecting them to the action of temperature and of UVR and their interaction. Our results showed that the joint action of these two factors increased the primary production:bacterivory ratio and stoichiometric values (N:P ratio) close to Redfield's ratio. Therefore, temperature and UVR shifted the metabolism of both organisms toward greater phototrophy regardless of the original position of the organism on the mixotrophic gradient. Weaker phagotrophic activity could cause a less efficient transfer of C to the top of trophic webs.
Elanor M Bell - One of the best experts on this subject based on the ideXlab platform.
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effects of temperature and nutrient regimes on biomass and lipid production by six oleaginous microalgae in batch culture employing a two phase cultivation strategy
Bioresource Technology, 2013Co-Authors: Michael Y Roleda, Stephen P Slocombe, Raymond J G Leakey, Elanor M Bell, Michele S StanleyAbstract:Abstract Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana , Odontella aurita , Nannochloropsis oculata , Isochrysis galbana , Chromulina ochromonoides , and Dunaliella tertiolecta , were cultivated under a matrix of two temperatures (10 and 20 °C) and two nutrient regimes (deplete and replete). For all species, a strong negative correlation between growth rate and lipid content was observed. Multiple stressors have no additive effect on lipid accumulation. Total oil content (fatty acid methyl esters, FAMEs, pg cell −1 ) was increased more by nutrient limitation than by temperature stress. In response to nutrient stress, N. oculata emerged as the most robust species with an increase in lipid accumulation of up to three to four-fold compared to the accumulation under nutrient sufficient conditions. Although stress conditions led to reduced fatty acid unsaturation in most taxa due to increased triacylglycerol (TAG) production, a high proportion of eicosapentaenoic acid (EPA) was maintained in O. aurita .
Raymond J G Leakey - One of the best experts on this subject based on the ideXlab platform.
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effects of temperature and nutrient regimes on biomass and lipid production by six oleaginous microalgae in batch culture employing a two phase cultivation strategy
Bioresource Technology, 2013Co-Authors: Michael Y Roleda, Stephen P Slocombe, Raymond J G Leakey, Elanor M Bell, Michele S StanleyAbstract:Abstract Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana , Odontella aurita , Nannochloropsis oculata , Isochrysis galbana , Chromulina ochromonoides , and Dunaliella tertiolecta , were cultivated under a matrix of two temperatures (10 and 20 °C) and two nutrient regimes (deplete and replete). For all species, a strong negative correlation between growth rate and lipid content was observed. Multiple stressors have no additive effect on lipid accumulation. Total oil content (fatty acid methyl esters, FAMEs, pg cell −1 ) was increased more by nutrient limitation than by temperature stress. In response to nutrient stress, N. oculata emerged as the most robust species with an increase in lipid accumulation of up to three to four-fold compared to the accumulation under nutrient sufficient conditions. Although stress conditions led to reduced fatty acid unsaturation in most taxa due to increased triacylglycerol (TAG) production, a high proportion of eicosapentaenoic acid (EPA) was maintained in O. aurita .