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Recent progress in enzymatic functionalization of carbon-hydrogen bonds for the green synthesis of chemicals

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Chinese Journal of Chemical engineering 2020年第10期28卷 2499-2506页

作者： Zheyu Wang Yupei Jian Yilei Han Zhongwang Fu Diannan Lu Jianzhong Wu Zheng Liu Key Lab of Industrial Biocatalysis Ministry of EducationDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China Department of Chemical and Environmental engineering University of CaliforniaRiversideCA 92521USA

Enzymatic reactions take place with high chemo-, regio-, and stereo-selectivity, appealing for the direct functionalization of abundant and inexpensive compounds with C-H bonds to make fine chemicals such as high-value intermediates and pharmaceuticals. This review summarizes recent progress in the enzymatic functionalization of C-H bonds with an emphasis on heme enzymes such as cytochrome P450 s, chloroperoxidase and unspecific peroxygenases. Specific examples are discussed to elucidate the applications of the molecular and process engineering approaches to overcome the challenges hindering enzymatic C-H functionalization. Also discussed is the recent development of the chemo-enzymatic cascade as an effective way to integrate the power of metal catalysis and enzymatic catalysis for C-H functionalization.

关键词： Biocatalysis biochemical engineering Enzyme C-H functionalization Chloroperoxidase

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Effects of Samarium Chloride on Porcine Thyroid Cells in Vitro

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Journal of Rare Earths 1994年第4期12卷 283-287页

作者：周莉聂毓秀陈玉兰牛春吉张树功倪嘉缵 Basic Medical College of Norman Bethune Univ of Medical Sciences Changchun China

To study the effects of various concentrations of SmCl3 on the morphology and functions of porcine thyroid cells in vitro, the methods of the electron microscope and radioimmunoassay were used. The investigation showed that when the thyroid cells were cultured in the presence of 0.001 and 0.01 mmol/L SmCl3, the measured levels of tetraiodothyronine (T4) were much higher than those in control cells and iodine uptake by thyroid cells increased, and the cells appeared to be active functional morphology under the electron microscope. When the thyroid cells were cultured in the presence of 0.1 mmol/L SmCl3, the levels of T4 and iodine uptake by cells decreased as compared with those in control cells, and the morphological changes of the cells presented an inactive functional state. From the evidences mentioned above, it demonstrates that very low concentrations (0.001 and 0.01 mmol/L) of SmCl3 promote synthesis and secretion of thyroid hormone, whereas a higher concentration (0.1 mmol/L of SmCl3) inhibits the synthesis and secretion of thyroid hormone.

关键词： Animal cell culture biochemical engineering Chlorine compounds

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Chemical engineering Dynamics: An Introduction to Modelling and Computer Simulation, Second Edition 2nd completely rev. ed

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Properties of Bio-oil from Fast Pyrolysis of Rice Husk

2000年

作者： Professor Dr. John Ingham Professor Dr. Irving J. Dunn Professor Dr. Elmar Heinzle Professor Dr. Jiri E. Prenosil(auth.)

ISBN: (纸本)9783527297764;9783527614103

From the Publisher: In this book, the modelling of dynamic chemical engineering processes is presented in a highly understandable way using the unique combination of simplified fundamental theory and direct hands-on computer simulation. The mathematics is kept to a minimum, and yet the nearly 100 examples supplied on a CD-ROM illustrate almost every aspect of chemical engineering science. Each example is described in detail, including the model equations. They are written in the modern user-friendly simulation language Berkeley Madonna, which can be run on both Windows PC and Power-Macintosh computers.

关键词： biochemical engineering

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Chinese Journal of Chemical engineering 2011年第1期19卷 116-121页

作者：郭秀娟王树荣王琦郭祚刚骆仲泱 State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

Physicochemical properties of bio-oil obtained from fast pyrolysis of rice husk were studied in the present *** distillation was used to separate the crude bio-oil into three fractions *** fraction,middle fraction and heavy *** chemical composition was analyzed by gas chromatograph and mass spectrometer（GC-MS）.The thermal behavior,including evaporation and decomposition,was investigated using thermogravimetric analyzer coupled with Fourier transform infrared spectrometer（TG-FTIR）.The product distribution was significantly affected by contents of cellulose,hemicellulose and *** bio-oil yield was 46.36%（by mass） and the yield of gaseous products was 27%（by mass）.The chemicals in the bio-oil included acids,aldehydes,ketones,alcohols,phenols,sugars,*** light fraction was mainly composed of acids and compounds with lower boiling point temperature,the middle and heavy fractions were consisted of phenols and *** thermal stability of the bio-oil was determined by the interactions and intersolubility of *** was found that the thermal stability of bio-oil was better than the light fraction,but worse than the middle and heavy fractions.

关键词： biochemical engineering bio-oil fast pyrolysis decomposition distillation

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Enhanced triterpene acid production by Ganoderma lucidum using a feeding stimulus with integration of a two-stage pH control strategy

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Enhanced triterpene acid production by Ganoderma lucidum usi...

高分子微球的粒径和结构控制及其在生化工程中的应用研究

中国菌物学会2016年学术年会

作者：刘高强王晓玲杨海龙 College of Life Science and Technology Central South University of Forestry and Technology College of Life and Environmental Science Wenzhou University

BACKGROUND:Triterpenes（especially triterpene acids） is one of the major physiologically active components of Ganoderma ***,submerged fermentation techniques of triterpenes is not optimized for commercial use,as total triterpene yield is still very *** aims are to develop a two-stage p H control strategy integrated with a stimulus,an ether extract（EECM,from the medicinal insect,Catharsius molossus）,for enhanced *** triterpene acid ***:The triterpene acid production of 302.76 mg/L was obtained in the *** culture with EECM,which was higher by 60% compared with control cultures not fed *** on the feeding EECM method,a new two-stage p H control strategy was integrated resulting in triterpene acid yields of 361.47 mg/*** studies optimized interactions between EECM feeding and two-stage p H control strategies,which resulted in an optimal EECM concentration of 185.89 mg/L,optimal p H values of 5.07 in the first 72 h incubation and 4.37 after 72 h with a maximum triterpene acid concentration of 449.37 mg/*** represented a 137% increase compared to that of the control ***,using a 150-L fermenter under these conditions,a triterpene acid concentration of 431.83 mg/L was ***:Enhanced production of triterpene acid in submerged cultures of *** was achieved using an EECM feeding stimulus integrated with a two-stage p H control strategy in a large scale.

关键词： Ganoderma lucidum Triterpene acids Fermentation Process control biochemical engineering Bioprocesses

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高分子微球的粒径和结构控制及其在生化工程中的应用研究