By R. Tucker Abbott, S. Peter Dance

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1992) Astaxanthin and canthaxanthin are potent antioxidants in a membrane model. Arch. Biochem. , 297, 291–95. Pohl, P. (1982) Lipids and fatty acids in microalgae. In: Handbook of Biosolar Resource (ed. R. Zaborsky), Vol. 1, pp. 383–404. CRC Press, Boca Raton, USA. H. (1978) Permanent slides. In: Phytoplankton Manual (ed. A. Sournia), pp. 114–18. United Nations Educational, Scientific and Cultural Organization, Paris. Richmond, A. (1990) Large scale microalgal culture and applications. E. J. Chapman), Vol.

Bacillariophyta The class of Bacillariophyceae, or diatoms, includes a very conspicuous number of golden brown unicellular organisms. The diatoms live mostly singly or attached to one another in chains of cells or in colonial aggregations, in aquatic and terrestrial habitats. Their colour is due to the masking of the green colour of chlorophylls a, c1 and c2 by the brown and yellow pigmentation of the fucoxanthin and b-carotene. The storage product is chrysolaminarin (b-1,3-linked glucan). Lipids are also present.

These accessory The light reactions of photosynthesis 25 pigments absorb blue-green, green, yellow, or orange light (500–650 nm). In contrast to the Chl-proteins and carotenoid-proteins, phycobiliproteins are water-soluble and the pigments are covalently bound to apoprotein (Fig. 4B). Some pigments in algae do not transfer excitation energy. g. g. e. combinations of nutrient deficiency, temperature extremes and high irradiance). These pigments are found in the cytoplasm and their metabolic role is unknown.

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