被引排行
Study On Polyamide 6/Polypropylene Blending
LIU Chang sheng 1,WANG Qi 2 (1.Department of Materials Science & Engineering,Wuhan Institute of Chemical Technology, Wuhan 430073,China;2.Polymer Research Institute of Sichuan University,Chengdu 610065,China)Polyamide 6/polypropylene blends were prepared using polypropylene graft maleic anhydride(PP g MAH),prepared by solid phase mechano chemical method,as compatibilizer.Effect of volume ratio of polyamide 6/polypropylene and the amount of PP g MAH on mechanical properties of blends were investigated.The reaction mechanism for the action of compatibilizer was explored by Molau experiment and FT IR analysis.
Comparison of Measuring Methods for Activity of Pyruvate Dehydrogenase
HE Ya-hui1,JIANG Ying1,YUAN Jun-lin1, HE Hong-wu2,TAN Hong-liang1, YANG Xu1,DING Shu-mao1(1.Life Science College of Central China Normal University,Wuhan 430079,China;2.Chemistry College of Central China Normal University,Wuhan 430079,China)Several current measuring methods for activity of pyruvate dehydrogenase are compared and studied.The results show that 2,6-DCPIP method is economic and effective with relatively high sensitivity for measuring activity of pyruvate dehydrogenase (E1).The potassium ferricyanide method is the worst as to reaction time and change of phenomena.But 2,6-DCPIP can't be used for measuring activity of pyruvate dehydrogenase complex,whereas CoA method is suitable with good sensitivity.
Study on Performance and Regeneration of Desulfurization Sorbent Zinc Ferrite for Hot Coal Gas
YU Fang-fang,ZHANG Zhi-juan,WU Jian-dong(College of Environmental Science and Engineering,South China University of Technology,Guangzhou 510006,China)Zinc ferrite prepared by coprecipitation was identified as a novel desulfurization sorbent for hot coal gas.The reactivity,durability and regeneration under different technological conditions were determined.The result showed that the agent was effective for sulfur removal and could be well regenerated,and sulfidation at higher temperature brought about higher sulfur capacity.Higher O2 content in regeneration gas promoted the regeneration process,but the sulfur capacity was decreased slightly.
Determination of the Activity of α-Amylase by Visible Spectrophotometry
ZHANG Xuejiao;TIAN Huan;LIU Chunye;YOU Jing;According to the characteristic absorption of complex formed by I~-3 and starch,the activity of α-amylase is determined by visible spectrophotometry,which is determined through the amount of starch hydrolyzed before and after adding α-amylase.From the experimental results,we find that the maximum absorbance of complex is at 580 nm,and the color is stability in Na_2HPO4-citric acid buffer with pH value of 6.5.When a certain amount of starch is added,changing the concentration of α-amylase from 0.001-0.008 mg·mL-1,there is a good linear relationship between the concentration(x) and the activity(y) of α-amylase,and the linear equation is y=375.75x+0.1208(R2=0.9939).This method can be used to determine the activity of α-amylase.
Enhancement of 1,3-Propanediol Production by Klebsiella Pneumoniae with Controlling Nitrogen Concentration
TAO Chun-ping,LIU Peng-bo,XIA Min,FU Shui-lin,GONG Heng(State Key Laboratory of Bioreactor Engineering,East China University of Science and Technology,Shanghai 200237,China)Through studying on the process of glycerol fermentation to 1,3-propanediol(1,3-PD) by Klebsiella pneumoniae,it was found that the cell growth and product(or by-product) production were significantly affected by nitrogen concentration.Cell growth and product formation reduced at low nitrogen concentration.High nitrogen concentration led to overgrowth of cells and overproduction of by-products,therefore,decrease of 1,3-PD final concentration and conversion of glycerol to 1,3-PD.When the nitrogen concentration was controlled under appropriate manner,the level of 1,3-PD production was markedly enhanced.The final 1,3-PD concentration and the conversion of glycerol to 1,3-PD were 61.20 g·L-1 and 0.72(mol·mol-1) respectively,increased 10% and 20% over control.
Discussion on Corrosion Factors of Oil Well
HUANG Jinying1,WEI Huifang2(1Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074,China;2The Second Plant of Zhongyuan Oilfield,Fanxian 457532,China)In order to afford some effective theorical basis for corrosion inhibition in oil well, in this paper, various factors of corrosion in oil exploitation were systematically analyzed and discussed
Research Progress in Degradation of Pollutants by Persulfate Activation Technology
XU Wen-si;PENG Wei;ZHANG Xing;LI Chen-xu;LIU Jie;We briefly introduce physical and chemical properties of persulfate( PS),and emphatically introduce the PS activation technology,including transition metal ions activation,transition metal activation,carbon activation,and thermal activation,etc.Meanwhile,we summarize the activation mechanism and the application of activated PS in the degradation of organic matter,and propose the main research directions and the technical improvement directions of PS activation technology in the future.
The Application Development of Quantum Dots in the Field of Biomedicine
YU Bing1,2,XIAO Guo-hua1,CONG Hai-lin1,2,WANG Zong-hua1,2,LIU Xiao-mian1,2(1.College of Chemical and Environmental Engineering,Qingdao University,Qingdao 266071,China;2.Laboratory for New Fiber Materials and Modern Textile,Growing Base for State Key Laboratory,Qingdao University,Qingdao 266071,China)Quantum dots are a new type of semiconducter luminescent nanomaterials.Having special surface effect,dielectric effect and quantum effect in structure,quantum dots possess many novel optical properties,and develop rapidly in the fields of biomedicine and analytical chemistry.According to the latest research developments,the fabrication and modification of quantum dots and biomedical application progress of the quantum dots based probes are reviewed in this article,and the future direction of development is forecasted.