Characterization,functional properties,and antioxidant activities of macromolecular extracts isolated from Pyropia yezoensis  

作　　者：Xiaoqing WANG Lihua GENG Yang YUE Ning WU Quanbin ZHANG Yongdong ZHOU Jing WANG 

机构地区：[1]CAS and Shandong Province Key Laboratory of Experimental Marine Biology,Center for Ocean Mega-Science,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]Laboratory for Marine Biology and Biotechnology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Jiangsu Dongshang Eslite Co.Ltd.,Yancheng 224145,China

出　　处：《Journal of Oceanology and Limnology》2022年第1期273-283,共11页海洋湖沼学报（英文）

基　　金：Supported by the National Key Research and Development Program of China(No.2019YFD0900705);the Science and Technology Project of Fujian Province(No.2017T3015);the Major Scientifi c&Engineering Projects of Innovation in Shandong Province(No.2019JZZY010818);the North Jiangsu Science and Technology Special Fund(No.SZYC2018012)。

摘　　要：Pyropia yezoensis is one of the most economical seaweed species in China.Determining how to make full use of mature P.yezoensis and exploring new ways to increase the value of its resources are important subjects of research for the development of the laver breeding industry.In this study,we provide a simple method to comprehensively extract the bioactive substances from P.yezoensis.The characteristics,functional properties,and antioxidant activities of two types of biopolymer extract from P.yezoensis were studied and analyzed relatively.Based on the characterization of water-soluble concentrate(WSC)and alkali-soluble concentrate(ASC),obtained via chemical analysis,including Fourier Transform Infrared Spectrometer(FT-IR)and Thermal Gravimetric Analyzer(TGA),and diff erential scanning calorimetry(DSC),they both had typical polysaccharide and protein characteristics and steady composition.ASC showed higher nitrogen solubility,water holding capacity,and foaming ability.ASC could not only be used as a protein supplement,but also performed well in improving the properties of foods in terms of water holding and fat-absorption.The emulsifying activity and oil-holding capacity of WSC were observed to be higher than those of ASC.Thus,WSC has the potential to be used as an emulsifi er.Surprisingly,WSC and ASC have radical scavenging capacity in vitro,which broadens the direction of their application.

关 键 词：Pyropia yezoensis water-soluble concentrate alkali-soluble concentrate chemical composition functional properties 

分 类 号：TS254.1[轻工技术与工程—水产品加工及贮藏工程]