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 differential 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 emulsifier. Surprisingly, WSC and ASC have radical scavenging capacity in vitro, which broadens the direction of their application.

Xiaoqing WANG;Lihua GENG;Yang YUE;Ning WU;Quanbin ZHANG;Yongdong ZHOU;Jing WANG

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;Laboratory for Marine Biology and Biotechnology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;University of Chinese Academy of Sciences,Beijing 100049,China;Jiangsu Dongshang Eslite Co.Ltd.,Yancheng 224145,China

海洋湖沼学报（英文版）

[1]Xiaoqing WANG;Lihua GENG;Yang YUE;Ning WU;Quanbin ZHANG;Yongdong ZHOU;Jing WANG-.Characterization, functional properties, and antioxidant activities of macromolecular extracts isolated from Pyropia yezoensis)[J].海洋湖沼学报（英文版）,2022(01):273-283

laver,Gravimetric

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