By Michael A. Borowitzka (auth.), Michael A. Borowitzka, Navid R. Moheimani (eds.)
Microalgae are some of the most studied power assets of biofuels and bioenergy. This e-book covers the main steps within the creation of renewable biofuels from microalgae - pressure choice, tradition structures, inorganic carbon utilisation, lipid metabolism and caliber, hydrogen creation, genetic engineering, biomass harvesting, extraction. Greenhouse fuel and techno-economic modelling are reviewed as is the a hundred yr background of microalgae as assets of biofuels and of commercial-scale microalgae tradition. A precis of proper easy typical tools utilized in the research of microalgae tradition is supplied. The booklet is meant for the professional and people beginning paintings within the field.
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Additional info for Algae for Biofuels and Energy
Braunii (Matsunaga et al. 2009). An understanding of hydrocarbon biosynthetic pathways and their regulation may provide an important tool for metabolic manipulation and increasing the yield of hydrocarbons in potential algal species. In this direction, some achievements have been demonstrated when studying hydrocarbon biosynthesis in B. braunii. From a number of radiolabelling experiments, it has been shown that oleic acid (but not palmitic or stearic acids) was a precursor (through chain elongation-decarboxylation reactions) for non-isoprenoid hydrocarbon production in the A race of B.
2010). For two of the cDNA sequences (OtDGAT2A and B), enzyme activity has been determined by heterologous expression in Saccharomyces cerevisiae mutant strains which had impaired TAG metabolism (Wagner et al. 2010). DGAT1 isolated from the diatom microalga Phaeodactylum tricornutum (PtDGAT1) showed a high homology to several functionally characterised higher plant DGAT1 proteins, and functional expression of PtDGAT1 was achieved in S. cerevisiae (Guihéneuf et al. 2011). The recent advances in the identification of genes involved in algal lipid metabolism have been thoroughly reviewed by Khozin-Goldberg and Cohen (2011).
In general, lower growth temperatures lead to increased levels of unsaturated fatty acids in algae although the details of these alterations may vary from species to species. Moreover, some additional subtle alterations may be often seen in many algae rather than a simple correlation of increased unsaturation with lower temperatures. The general alterations in fatty acid unsaturation in algae mirror similar changes observed in other eukaryotes as well as cyanobacteria (Harwood 1998b). 2 Light Light intensity also influences algal lipid metabolism and, therefore, lipid composition (Harwood 1998b).