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Preparation and characterization of squid pen chitooligosaccharide-epigallocatechin gallate conjugates and their antioxidant and antimicrobial activities

机译:鱿鱼壳寡糖的制备与表征鱿鱼蛋白 - EpigallocateChin Gallated缀合物及其抗氧化剂和抗微生物活性

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摘要

Chitooligosaccharide (COS) and epigallocatechin-3-gallate (EGCG) at various concentrations were used for the preparation of COS-EGCG conjugates. The highest total phenolic content (TPC), representing the amount of EGCG conjugated, was obtained for 1 wt% COS together with EGCG at 0.5 wt% (C1-E0.5-conjugate) or 1.0 wt% (C1-E1.0-conjugate) (66.83 and 69.22 mg EGCG per g sample, respectively) (p< 0.05). The 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and 2,2 '-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activities (DRSA and ARSA, respectively) and ferric reducing antioxidant power (FRAP) of all the samples showed similar trends with TPC. The C1-E0.5-conjugate had higher DRSA, ARSA, FRAP and oxygen radical absorbance capacity (ORAC) values than COS (p< 0.05). Similarly, the antimicrobial activity of COS increased when conjugated with EGCG (p< 0.05). FTIR,H-1-NMR and(13)C-NMR analyses confirmed the successful grafting of EGCG with COS. Therefore, 1 wt% COS and 0.5 wt% EGCG were used for the production of a conjugate with augmented antioxidant activity, which could be used to retard lipid oxidation of fatty foods.
机译:以各种浓度的氯寡核苷(COS)和EPIGALLOCATECHIN-3 - gallate(EGCG)用于制备COS-EGCG缀合物。代表EGCG缀合量的总酚醛含量(TPC)以0.5wt%(C1-E0.5-缀合物)或1.0wt%(C1-E1.0-共轭)(分别为每G样品66.83和69.22mg EGCG)(P <0.05)。 2,2-二苯基-1-Picryl-肼 - 水合物(DPPH)和2,2'-唑-BIS(3-乙基苯并噻唑啉-6-磺酸)(ABTS)自由基清除活性(分别)和分别为DRSA和ARSA)和所有样品的抗氧化力(FRAP)的抗氧化力(FRAP)显示出类似的TPC趋势。 C1-E0.5缀合物具有高于COS(P <0.05)的DRSA,ARSA,FRAP和氧自由基吸收能力(ORAC)值。类似地,COS的抗微生物活性与EGCG缀合时增加(P <0.05)。 FTIR,H-1-NMR和(13)C-NMR分析证实了与COS的EGCG成功接枝。因此,使用1wt%COS和0.5wt%EGCG用于制备缀合物,其可以是增强的抗氧化活性,可以用于延缓脂肪食品的脂质氧化。

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  • 来源
    《RSC Advances》 |2020年第55期|共9页
  • 作者单位

    Prince Songkla Univ Int Ctr Excellence Seafood Sci &

    Innovat Fac Agroind Hat Yai 90110 Songkhla Thailand;

    Prince Songkla Univ Int Ctr Excellence Seafood Sci &

    Innovat Fac Agroind Hat Yai 90110 Songkhla Thailand;

    Univ Malaysia Sabah Fac Food Sci &

    Nutr Jalan UMS Kota Kinabalu 88400 Sabah Malaysia;

    Minist Nat Resources Inst Oceanog 3 Tech Innovat Ctr Utilizat Marine Biol Resources Xiamen 361005 Peoples R China;

    Minist Nat Resources Inst Oceanog 3 Tech Innovat Ctr Utilizat Marine Biol Resources Xiamen 361005 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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