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Culture of microalgae in hatcheries : ウィキペディア英語版 | Culture of microalgae in hatcheries
Microalgae or microscopic algae grow in either marine or freshwater systems. They are primary producers in the oceans that convert water and carbon dioxide to biomass and oxygen in the presence of sunlight. The oldest documented use of microalgae was 2000 years ago, when the Chinese used the cyanobacteria ''Nostoc'' as a food source during a famine. Another type of microalgae, the cyanobacteria ''Arthrospira'' (Spirulina), was a common food source among populations in Chad and Aztecs in Mexico as far back as the 16th century.〔Whitton, B., and M. Potts. 2000. (''The ecology of Cyanobacteria: their diversity in time and space'' ) p. 506, Kluwer Academic. ISBN 978-0-7923-4735-4.〕 Today cultured microalgae is used as direct feed for humans and land-based farm animals, and as feed for cultured aquatic species such as molluscs and the early larval stages of fish and crustaceans.〔Barnabé, Gilbert (1994) (''Aquaculture: biology and ecology of cultured species'' ) p. 53, Taylor & Francis. ISBN 978-0-13-482316-4.〕 It is a potential candidate for biofuel production.〔 Microalgae can grow 20 or 30 times faster than traditional food crops, and has no need to compete for arable land.〔Greenwell HC, Laurens LML, Shields RJ, Lovitt RW and Flynn KJ (2010) ("Placing microalgae on the biofuels priority list: a review of the technological challenges" ) ''J. R. Soc. Interface,'' 7 (46) 703–726. 〕 Since microalgal production is central to so many commercial applications, there is a need for production techniques which increase productivity and are economically profitable. ==Commonly cultivated microalgae species==
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