论文信息 - Singlet oxygen quenching ability of astaxanthin esters from the green alga Haematococcus pluvialis

Singlet oxygen quenching ability of astaxanthin esters from the green alga Haematococcus pluvialis

The singlet oxygen quenching activities of carotenoids, β-carotene, free astaxanthin, its monoester and its diester, were examined in vitro by a simple and rapid method for the measurement of Methylene Blue-sensitized photooxidation of linoleic acid in the hexane/ethanol solvent system. The concentrations of carotenoids, β-carotene, free astaxanthin, its mono- and di-ester, required for 50% inhibition of lipid oxidation were 40, 8, 9, and 0 μM in 100% ethanol and, 14, 16, 10, and 7 μM in 50% (v/v) hexane in ethanol, respectively. Astaxanthin esters function as powerful antioxidant agents under both hydrophobic and hydrophilic conditions.

M. Kobayashi | M. Kobayashi | Y. Sakamoto | Y. Sakamoto

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