摘要
Japanese edible brown seaweeds, Eisenia bicyclis (Arame), Kjellmaniella crassifolia (Gagome), Alaria crassifolia (Chigaiso), Sargassum horneri (Akamoku), and Cystoseira hakodatensis (Uganomoku) were assayed for total phenolic content (TPC), fucoxanthin content, radical scavenging activities (DPPH, peroxyl radical, ABTS, and nitric oxide), and antioxidant activity in a liposome system. Among the solvents used for extraction, methanol was the most effective to extract total phenolics (TPC) from brown seaweeds. Among 5 kinds of brown seaweeds analyzed, methanol extract from C. hakodatensis was the best source for antioxidants. The high antioxidant activity of the extract was based not only on the high content of phenolics, but on the presence of fucoxanthin. No significant correlation (P > 0.05) was observed between TPC per gram extract with DPPH radical scavenging activity of the methanol extracts. These observed discrepancy would be due to structural variations in the phenolic compounds, and different levels of fucoxanthin in the extracts. The present study also demonstrated the synergy in the antioxidant activity of the combination of brown seaweed phenolics and fucoxanthin.
摘要译文
日本可食用的棕色海藻，Eisenia bicyclis（Arame），Kjellmaniella crassifolia（Gagome），Alaria crassifolia（Chigaiso），Sargassum horneri（Akamoku），测定了总酚含量（TPC），岩藻黄质含量，自由基清除活性（DPPH，过氧基，ABTS和一氧化氮）的Cystoseira hakodatensis（Uganomoku）和脂质体系中的抗氧化活性。在用于提取的溶剂中，甲醇是最有效的从棕色海藻提取总酚类（TPC）。在分析的5种褐藻中，来自霍霍格达黄曲霉的甲醇提取物是抗氧化剂的最佳来源。提取物的高抗氧化活性不仅取决于高含量的酚类，而且还依赖于岩藻黄素的存在。无显着相关（P 0。05）在每克提取物的TPC之间观察到具有甲醇提取物的DPPH自由基清除活性。这些观察到的差异将归因于酚类化合物的结构变化，和提取物中不同水平的岩藻黄质。本研究还证实了棕色海藻酚酸和岩藻黄素组合的抗氧化活性的协同作用。
M.K. Widjaja-Adhi Airanthi, Masashi Hosokawa and Kazuo Miyashita. Comparative Antioxidant Activity of Edible Japanese Brown Seaweeds[J]. Journal of Food Science, 2011,76(1): C104-C111