Browsing by Subject "lipid"
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Item Algal biofuels : the effect of temperature on algal growth and lipid content(2009-08) Klenzendorf, Stephanie Marie; Marshall, Jill Ann; Mehdy, Mona Cynthia, 1955-; Sathasivan, KanagasabapathiReplacing fossil fuels with algae, a renewable resource, is an exciting possibility. This study evaluates the algae found in South Texas brackish water ponds used for aquaculture of fish as a possible source of biofuels. Samples of algae from these ponds were cultured at varying temperatures ranging from 15.5ºC to 36.5ºC. High levels of growth were observed at 20.5ºC and the highest lipid content was measured at 23.0ºC. Temperature was also a factor in the distribution of microalgal taxa throughout the temperature gradient. This information will be added to the growing body of research investigating similar cultures of algae for future biofuel production.Item Progression of lipid profile and cell structure in a research-scale production pathway for algal biocrude(Elsevier, 2013-02) Beal, C.M.; Hebner, R.E.; Romanovicz, D.K.; Mayer, C.C.; Connelly, R.L.Although there has been a large research effort associated with individual parts of various algal biofuel production pathways, few studies have tracked changes in product composition throughout an integrated biofuel production process. This study uses microscopy and chromatography to analyze the progression of lipid profile and cell structure of algal cells throughout a research-scale production pathway for biocrude. For the specific processing methods used in this pathway, it is shown that TAG content decreased, while DAG and FFA content increased during processing. The changes in the lipid content corresponded to cell degradation that was observed by SEM and TEM throughout processing. These results demonstrate the dynamic nature of lipid composition in an algal culture used for biofuel production and emphasize the need to monitor changes in lipid profile, as those changes can directly impact biofuel productivity.