The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol,an important chemical ...The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol,an important chemical used widely is also a main product of sugar-based fermentation carried out by Klebsiella pneumoniae.In this study,we investigated the use of salting-out extraction(SOE) that employed a K2HPO4/ethanol system consisting of 21% ethanol and 17% K2HPO4(mass fraction) to separate 2,3-butanediol from the viscous Jerusalem artichoke-based fermentation broth.After SOE,about 98% of solid matters was removed,and the viscosity decreased from 72.5 mPa s in the original fermentation broth to 4.4 mPa s in the top phase.The partition coefficient and yield of 2,3-butanediol reached 13.4 and 99%,respectively,and 89% of soluble proteins was removed from the broth.The results showed that SOE is an efficient way for isolating 2,3-BD from a highly viscous fermentation broth by removing much of the solid matters within the broth.展开更多
With new requirements proposed for technical standards work under the new circumstances,the article combining with the practice of Wuhan Iron and Steel Company Limited(WISCO)points out that enterprises must improve th...With new requirements proposed for technical standards work under the new circumstances,the article combining with the practice of Wuhan Iron and Steel Company Limited(WISCO)points out that enterprises must improve the work pattern of standards development and revision,and strengthen the standards implementation management and product quality supervision,so that technical standards can serve as a bridge between technologies and industrialization,support the industrial upgrading and structural optimization,create conditions for promoting trade and unify the market and provides means for global competition,helping enterprises to better cope with the increasing market competition.展开更多
Human resources are at the core ofany certification body.To establish the public credibilityof its work,a certification body must constructa professional and high quality personnel team thatcan meet the demands of var...Human resources are at the core ofany certification body.To establish the public credibilityof its work,a certification body must constructa professional and high quality personnel team thatcan meet the demands of various certificationtasks.The China Quality Mark Certification Group(CQM Group) attaches great importance to the constructionof human resources.Taking the training offirst-rate personnel as the primary objective of itsstrategic development,the Group has formulatedand gradually implemented the human resource developmentstrategy.It has also adapted and improvedthe professional structure of its certificationpersonnel in a timely manner,planned and organizedcontinuous education for these personnel andstrengthened monitoring of the use process of certificationpersonnel.This has been done to improvethe core competitiveness of the CQM Group and torealize the strategic objective of becoming an "internationalname brand certification body with first-ratepersonnel,first-rate management,first-rate qualityand first-rate services".展开更多
基金Supported by the National High Technology Research and Development Program of China (2009AA05Z443)
文摘The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol,an important chemical used widely is also a main product of sugar-based fermentation carried out by Klebsiella pneumoniae.In this study,we investigated the use of salting-out extraction(SOE) that employed a K2HPO4/ethanol system consisting of 21% ethanol and 17% K2HPO4(mass fraction) to separate 2,3-butanediol from the viscous Jerusalem artichoke-based fermentation broth.After SOE,about 98% of solid matters was removed,and the viscosity decreased from 72.5 mPa s in the original fermentation broth to 4.4 mPa s in the top phase.The partition coefficient and yield of 2,3-butanediol reached 13.4 and 99%,respectively,and 89% of soluble proteins was removed from the broth.The results showed that SOE is an efficient way for isolating 2,3-BD from a highly viscous fermentation broth by removing much of the solid matters within the broth.
文摘With new requirements proposed for technical standards work under the new circumstances,the article combining with the practice of Wuhan Iron and Steel Company Limited(WISCO)points out that enterprises must improve the work pattern of standards development and revision,and strengthen the standards implementation management and product quality supervision,so that technical standards can serve as a bridge between technologies and industrialization,support the industrial upgrading and structural optimization,create conditions for promoting trade and unify the market and provides means for global competition,helping enterprises to better cope with the increasing market competition.
文摘Human resources are at the core ofany certification body.To establish the public credibilityof its work,a certification body must constructa professional and high quality personnel team thatcan meet the demands of various certificationtasks.The China Quality Mark Certification Group(CQM Group) attaches great importance to the constructionof human resources.Taking the training offirst-rate personnel as the primary objective of itsstrategic development,the Group has formulatedand gradually implemented the human resource developmentstrategy.It has also adapted and improvedthe professional structure of its certificationpersonnel in a timely manner,planned and organizedcontinuous education for these personnel andstrengthened monitoring of the use process of certificationpersonnel.This has been done to improvethe core competitiveness of the CQM Group and torealize the strategic objective of becoming an "internationalname brand certification body with first-ratepersonnel,first-rate management,first-rate qualityand first-rate services".
