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ความสัมพันธ์ของปริมาณแอนโทไซยานินต่อปริมาณโพลีฟีนอล และความสามารถในการต้านปฏิกิริยาออกซิเดชันในข้าวสีและไม่มีสีสายพันธุ์ต่างๆ Thai Agricultural
Nipattha Chatsuwan; Varipat Areekul.
Anthocyanin, total polyphenol content and antioxidant activities of fifty-one Thai rice cultivars were investigated. The antioxidant activities were evaluated using three different assays; ferric reducing antioxidant power (FRAP), 2,2-azino-bis-(3-ethylbenzothi azoline-6-sulphonic acid) diammonium salt (ABTS) radical cation and oxygen radical absorbance capacity (ORAC) assays. The total polyphenol content (TPC) and anthocyanin content varied significantly and ranged from 0.194-8.702 and 0.001– 6.676 mg/g (dry wt), respectively. The extracts from pigmented rice exhibited higher TPC, anthocyanin content and antioxidant activities than did the non-pigmented varieties. Among them, glutinous dark rice (GDR) had the highest levels of TPC and anthocyanin content...
Tipo: Collection Palavras-chave: Pigmented rice; Polyphenol contents; Anthocyanin; Antioxidant Activity; Correlation; Cultivars; ข้าวสี; โพลีฟีนอล; แอนโทไซยานิน; ความสามารถในการต้านปฏิกิริยาออกซิเดชัน; ค่าสัมประสิทธิ์สหสัมพันธ์; พันธุ์.
Ano: 2010 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5233
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ความสามารถในการต้านออกซิเดชันและปริมาณสารฟีโนลิครวมของเยื่อหุ้มเมล็ดถั่วลิสง Thai Agricultural
Prasan Swatsitang; Pornnapa Chuendchom; Sanun Jogloy.
Peanut testae or peanut skins are normally discarded as a by-product of peanut processing. Peanut testae contain some beneficial phytochemicals that can show the antioxidant effect in vitro and in food. Therefore, the aim of this study was to determine the antioxidant capacity of the peanut testae of 9 peanut varieties. The average amount of peanut testa was 3.62 ± 0.80 % of whole seed. The average moisture content of peanut testae was 11.00 ± 0.90 %. The methanol extracts of peanut testae exhibited the ability to scavenge both DPPH radical and hydroxyl radical in vitro . The total phenolic contents of peanut testae were 6,267.70 – 10,292.08 mg GAE/100 g, with an average of 8,554.97 ± 1,264.80 mg GAE/100 g. The total phenolics of peanut testae...
Tipo: Collection Palavras-chave: Peanut testa; Antioxidant capacity; Total phenolics; ถั่วลิสง; ความสามารถในการต้านออกซิเดชัน; ปริมาณสารฟีโนลิครวม; เยื่อหุ้มเมล็ด; ค่าสัมประสิทธิ์สหสัมพันธ์.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5117
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