Degradation of porphyran from Porphyra haitanensis and the antioxidant activities of the degraded porphyrans with different molecular weight

doi:10.1016/j.ijbiomac.2005.12.018

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	Degradation of porphyran from Porphyra haitanensis and the antioxidant activities of the degraded porphyrans with different molecular weight
	Zhao, TT ; Zhang, QB ; Qi, HM ; Zhang, H; Niu, XZ ; Xu, ZH ; Li, Z
	2006-02-28
发表期刊	INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
ISSN	0141-8130
卷号	38 期号:1 页码:45-50
文章类型	Article
摘要	In the present paper, ascorbate and hydrogen peroxide (H2O2) were used to degrade porphyran. It was found that porphyran could be degraded by free radical that was generated by ascorbate and H2O2 in combination. It was possible to prepare desired porphyran products with different molecular weight by adjusting ascorbate to H,02 proportions and their concentrations. The molar ratio of I was demonstrated more effective than in other ratios. Higher concentrations accelerated the degradation. Moreover, results of chemical analysis and FT-IR spectra suggested that the main structure of degraded products still remained although some changes happened. The degraded and natural porphyrans possessed scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH)-radical activity and reducing power. Higher antioxidant activities were found in both systems when the molecular weight was reduced. The results indicated that the antioxidant activities were closely related to the molecular weight. The degraded porphyrans are potential antioxidant in vitro. (c) 2006 Elsevier B.V. All rights reserved.; In the present paper, ascorbate and hydrogen peroxide (H2O2) were used to degrade porphyran. It was found that porphyran could be degraded by free radical that was generated by ascorbate and H2O2 in combination. It was possible to prepare desired porphyran products with different molecular weight by adjusting ascorbate to H,02 proportions and their concentrations. The molar ratio of I was demonstrated more effective than in other ratios. Higher concentrations accelerated the degradation. Moreover, results of chemical analysis and FT-IR spectra suggested that the main structure of degraded products still remained although some changes happened. The degraded and natural porphyrans possessed scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH)-radical activity and reducing power. Higher antioxidant activities were found in both systems when the molecular weight was reduced. The results indicated that the antioxidant activities were closely related to the molecular weight. The degraded porphyrans are potential antioxidant in vitro. (c) 2006 Elsevier B.V. All rights reserved.
关键词	Porphyra Haitanensis Porphyran Degradation Ascorbate Hydrogen Peroxide (H2o2) Antioxidant Activities
学科领域	Biochemistry & Molecular Biology
DOI	10.1016/j.ijbiomac.2005.12.018
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000236505600007
引用统计	被引频次：144[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/6176
专题	海洋生物技术研发中心
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhao, TT,Zhang, QB,Qi, HM,et al. Degradation of porphyran from Porphyra haitanensis and the antioxidant activities of the degraded porphyrans with different molecular weight[J]. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,2006,38(1):45-50.
APA	Zhao, TT.,Zhang, QB.,Qi, HM.,Zhang, H.,Niu, XZ.,...&Li, Z.(2006).Degradation of porphyran from Porphyra haitanensis and the antioxidant activities of the degraded porphyrans with different molecular weight.INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,38(1),45-50.
MLA	Zhao, TT,et al."Degradation of porphyran from Porphyra haitanensis and the antioxidant activities of the degraded porphyrans with different molecular weight".INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 38.1(2006):45-50.

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