Giant red sea cucumber (Parastichopus californicus) is an under-utilized species due to its high tendency to autolysis.The aim of this study was to evaluate the functional properties of collagen hydrolysates from this...Giant red sea cucumber (Parastichopus californicus) is an under-utilized species due to its high tendency to autolysis.The aim of this study was to evaluate the functional properties of collagen hydrolysates from this species.The degree of hydrolysis (DH),amino acid composition,SDS-PAGE,emulsion activity index (EAI),emulsion stability index (ESI),foam expansion (FE),and foam stability (FS) of hydrolysates were investigated.The effects of pH on the EAI,ESI FE and FS of hydrolysates were also inves-tigated.The results indicated that the β and α1 chains of the collagen were effectively hydrolyzed by trypsin at 50℃ with an En-zyme/Substrate (E/S) ration of 1:20 (w:w).The DH of collagen was up to 17.3% after 3 h hydrolysis with trypsin.The hydrolysates had a molecular weight distribution of 1.1 17 kDa,and were abundant in glycine (Gly),proline (Pro),glutamic acid (Glu),alanine (Ala) and hydroxyproline (Hyp) residues.The hydrolysates were fractionated into three fractions (< 3 kDa,3 10 kDa,and > 10 kDa),and the fraction of 3 10 kDa exhibited a higher EAI value than the fraction of > 10 kDa (P<0.05).The fraction of > 10 kDa had higher FE and FS values than other fractions (P<0.05).The pH had an important effect on the EAI,ESI,FE and FS.All the fractions showed undesirable emulsion and forming properties at pH 4.0.Under pH 7.0 and pH 10.0,the 3 10 kDa fraction showed higher EAI value and the fraction of > 10 kDa showed higher FE value,respectively.They are hoped to be utilized as functional ingredients in food and nutraceutical industries.展开更多
The SG186 Project about the informatization for State Grid Corporation of China （SGCC）, mainly aims to build a ＂Vertical breakthrough, horizontal integration＂ platform of intbrmation integration at the enterprise ...The SG186 Project about the informatization for State Grid Corporation of China （SGCC）, mainly aims to build a ＂Vertical breakthrough, horizontal integration＂ platform of intbrmation integration at the enterprise level and to initially build a digitization power network and an informatization enterprise; informatization standards system is one of the significant guaranteeing factors to completely finish SG186 project as well as provides the basic condition for the entire adoption and integration of existing information systems. This article has analyzed the necessity for the establishment of inlbrmatization standards system in the first place with the brief introduction to the current research achievements of the standards system and the loop-locked Identification-Execution-Check （REC） application strategy.展开更多
In order to improve the efficiency of product design and reduce the logistics cost, this paper first analyzes the information integration demand of product design department and logistics service department. Based on ...In order to improve the efficiency of product design and reduce the logistics cost, this paper first analyzes the information integration demand of product design department and logistics service department. Based on Web service technology, this paper builds the product logistics service information model for integration. Furthermore, through a sanitary appliance company application, a solid base is laid for increasing the product R＆D speed and logistics service.展开更多
基金supported by the National Key Technology Research and Development Program of China (Grant No.2006BAD30B01)the Research Award Fund for Excellent Young Scientist of Shandong Province,China (Grant No.BS2009HZ005)
文摘Giant red sea cucumber (Parastichopus californicus) is an under-utilized species due to its high tendency to autolysis.The aim of this study was to evaluate the functional properties of collagen hydrolysates from this species.The degree of hydrolysis (DH),amino acid composition,SDS-PAGE,emulsion activity index (EAI),emulsion stability index (ESI),foam expansion (FE),and foam stability (FS) of hydrolysates were investigated.The effects of pH on the EAI,ESI FE and FS of hydrolysates were also inves-tigated.The results indicated that the β and α1 chains of the collagen were effectively hydrolyzed by trypsin at 50℃ with an En-zyme/Substrate (E/S) ration of 1:20 (w:w).The DH of collagen was up to 17.3% after 3 h hydrolysis with trypsin.The hydrolysates had a molecular weight distribution of 1.1 17 kDa,and were abundant in glycine (Gly),proline (Pro),glutamic acid (Glu),alanine (Ala) and hydroxyproline (Hyp) residues.The hydrolysates were fractionated into three fractions (< 3 kDa,3 10 kDa,and > 10 kDa),and the fraction of 3 10 kDa exhibited a higher EAI value than the fraction of > 10 kDa (P<0.05).The fraction of > 10 kDa had higher FE and FS values than other fractions (P<0.05).The pH had an important effect on the EAI,ESI,FE and FS.All the fractions showed undesirable emulsion and forming properties at pH 4.0.Under pH 7.0 and pH 10.0,the 3 10 kDa fraction showed higher EAI value and the fraction of > 10 kDa showed higher FE value,respectively.They are hoped to be utilized as functional ingredients in food and nutraceutical industries.
文摘The SG186 Project about the informatization for State Grid Corporation of China （SGCC）, mainly aims to build a ＂Vertical breakthrough, horizontal integration＂ platform of intbrmation integration at the enterprise level and to initially build a digitization power network and an informatization enterprise; informatization standards system is one of the significant guaranteeing factors to completely finish SG186 project as well as provides the basic condition for the entire adoption and integration of existing information systems. This article has analyzed the necessity for the establishment of inlbrmatization standards system in the first place with the brief introduction to the current research achievements of the standards system and the loop-locked Identification-Execution-Check （REC） application strategy.
文摘In order to improve the efficiency of product design and reduce the logistics cost, this paper first analyzes the information integration demand of product design department and logistics service department. Based on Web service technology, this paper builds the product logistics service information model for integration. Furthermore, through a sanitary appliance company application, a solid base is laid for increasing the product R＆D speed and logistics service.
