Abstract

Abstract Arthrospira platensis ( A. platensis ) has been used in various fields including dietary supplements as it contains a high protein con-tent and large amounts of unsaturated fatty acids. In addition, it has some pigments such as phycocyanin, myxoxanthophyll and zeax-anthin and thus has been used as a food additive and antioxidant substance. Nano-bubble hydrogen is to dissolve more than the saturation solubility in water by injecting the hydrogen gas in the nano-bubble hydrogen water. The nano-bubbles are known to pos-sess higher antioxidant properties in addition to anticancer effects. In this paper, Arthrospira platensis was cultured in both a normal medium with distilled water and nano-bubble hydrogen water medium and their properties were compared. The cell growth and the content of chlorophyll and carotenoid in the nano-bubble hydrogen water was 15% higher than that of the control. The level of phyco-cyanin in nano-bubble hydrogen water was also 7% higher than that of the control. However, there were little differences in the lipid content between the nano-bubble and control. To determine the content of the antioxidants, the level of flavonoid and polyphenol were measured. The level of flavonoid in nano-bubble hydrogen water was found to be more than 70% increased when comparing to that of the control, while the level of polyphenol was similar to each other.

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