被引排行
Analysis of Volatile Aroma Components of Pleurotus Ostreatus and Lentinus Edodes with Gas Chromatography-Mass Spectrometry
LI Qin1,HAI Yang2,SHI Hui-qin1,DU Yue-guang2,XI Yu1,GUO Ling-yan2,ZHU Da-heng1 (1.Department of Bioengineering,Zhengzhou University,Zhengzhou 450001,China;2.Tianchang International Tobacco Co.,Ltd.,Xuchang 461000,China)Volatile aroma components in mature fresh fruiting bodies of Pleurotus ostreatus and Lentinus edodes were extracted with steam distillation and extraction equipment(SDE),and analyzed with GC-MS.The result showed that 12 kinds of volatile aroma components were identified in Pleurotus ostreatus,with total concentration 13.75 μg·g-1 FW,mainly including acids(11.28 μg·g-1FW).And the major aroma components were n-hexadecanoic acid,(Z,Z)-9,12-octadecadienoic acid,9-octadecenoic acid,3-methylcyclopentanone,linoleic acid ethyl ester and pentadecanoic acid.While 33 kinds of volatile aroma components were identified in Lentinus edodes,with total concentration 64.66 μg·g-1FW,including alcohols(22.38 μg·g-1FW),fatty acids(11.95 μg·g-1FW),hydrocarbons(9.49 μg·g-1FW),sulfurs(8.03 μg·g-1FW),ketones(5.03 μg·g-1FW),and esters(2.98 μg·g-1FW).And the major aroma components were 1-octen-3-ol,n-hexadecanoic acid,trisulfide dimethyl,3-octanol,3-octanone and(Z,Z)-9,12-octadecadienoic acid.
Study on Polysaccharide from Edible and Medical Fungus
WU Xin-jun~(1,2), MAO Pei-hong~(1,3), JIN Xiang~(1,3),ZENG Xian-xian~(1,3) (1. Ion Beam Bio-Engineering Center, Xinjiang University, Urumqi 830008, China; 2. College of Chemistry and Chemical Industry, Xinjiang University, Urumqi 830046, China; 3. Department of Physics, Xinjiang University, Urumqi 830046 , China)Fungus polysaccharide possesses an important value both in economy and in medical field. This paper reviewed and discussed its chemical structure, relation of structure and function, and the prospect of development and application.
Brief Analysis of Deduction of Langmuir Adsorption Isotherm
YAO Chen-xi;YANG Chun-xin;ZHOU Cheng-long;We presented three classical deduction methods of Langmuir adsorption isotherm,namely,adsorption kinetics,adsorption thermodynamics,and De Boen adsorption theory. Moreover,we mainly put forward a new deduction method——chemical reaction analogism,which introduced an adjustable parameter ν1. Through the change of ν1,the deduced adsorption isotherm can describe monolayer adsorption as well as multimolecular layer adsorption. When ν1 is in different ranges,the shape of adsorption isotherm curve is the same as that of type Ⅰ,Ⅲ,and Ⅴ adsorption isotherms.We summarized and compared the core mechanisms of these deduction methods,and explored the substantive characteristics of gas-solid adsorption.
Research Progress on Microbial Degradation Mechanisms for Polycyclic Aromatic Hydrocarbons
WANG Tao;LAN Hui;TIAN Yun;LU Xiang-yang;Polycyclic aromatic hydrocarbons(PAHs)are one of the common and the most refractory organic pollutants in the environment.Nowadays,low-toxicity or non-toxicity of PAHs by microbial degradation is one of the research highlights in the field of environmental remediation.In this paper,using naphthalene and phenanthrene as example,the microbial degradation mechanisms of PAHs are reviewed,and the application of"omics"technology in life science for research of microbial degradation of PAHs is summarized.The review lays a certain theoretical foundation for further exploring the microbial degradation and conversion mechanism for PAHs.
Research Progress of Inverse Emulsion Polymerization
WEI Xin,ZHONG Hong(Institute of Chemical Engineering and Metallurgy,Central South University,Changsha 410083,China)The characteristics,properties,polymerization mechanism and applications of inverse emulsion polymerization are reviewed,and research progress both at home and abroad are introduced.Some views concerning the prospect of development and research of inverse emulsion polymerization are also mentioned.
Study on Microbial Protein Production by Mixed Culture Solid-State Fermentation on Soybean Waste
PAN Tian-ling~1, ZHANG Dong-feng~2, ZHAO Chang-sheng~2, LI Kun-ping~1(1.Department of Pharmacy,Guangdong College of Pharmacy,Guangzhou 510240,China;2.Industry School,Central South Forestry University,Zhuzhou 412006,China)Production of microbial body protein was studied on soybean waste with T.viride,A.niger,S.cerevisiae and C.utilis by mixed culture solid state fermentation.Effects of four variable factors:components of medium,amount and comprising of inoculum,initial pH value and cultivation temperature were evaluated.It had been showed that the optimum conditions of the fermentation process were as follows:soybean waste∶wheat bran=8∶2,A.niger∶T.viride∶S.cerevisiae∶C.utilis=1∶1∶1∶3(inoculum size),initial pH value was 5.5 and cultivation temperature was 32℃.Under the optimum conditions,the amount of crude protein could be as high as 28.47%.It was about two times more compared with raw material.
Research Advance on Carrier Materials for Immobilization Cell Technology
CHEN Na-li,FENG Hui-xia,WANG Bing,ZHAO Xia(College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China)The immobilization cell technology is a new biological engineering technique based on immobilization enzyme.The key for this technology is the characteristics of the carrier materials for immobilization.In this work,the categories and characteristics of the carrier materials usually used in this technology are presented and the new carrier materials are introduced.The prospective developments of carrier materials are also foreseen.
New Progress in Bioremediation of Petroleum-Contaminated Soil
LIU Guo-liang1,SU You-ming2,GU Shu-min1,SONG Hong-guang1,YAN Gui-wen2,YU Wei-yu2(1.Henan Province Nylon Chemicals Co.Ltd.,Pingdingshan 467013,China;2.Chemical Science and Engineering Faculty,China University of Petroleum,Beijing 102249,China)New progress in bioremediation of petroleum-contaminated soil is described in this paper.The principle,characteristic and influencing factors about bioremediation of petroleum-contaminated soil are discussed,and the prospect for research emphasis of this field in future is carried out.
Application of Immobilized Cell
LI Ji-xin~1,ZHANG Chao~2,GAO Hong~2(1.The Institute of Speciality Products,Xinjiang Academy of Agriculture and Reclamation Science,Shihezi 832000,China;2.School of Food Science and Technology,Southern Yangtze University,Wuxi 214036,China)Immobilized cells are the core of the enzyme engineering,which advance the enzyme technology level.In this paper,we analyzed advantages and disadvantages of the immobilized cells used in industrial production. Then the applications of immobilized cells in food,fermentation and waste treatment industry were summarized,and the application prospects were expounded in the end.