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Kinetics of low level chemiluminescence from plant leaf smoked by air pollutants

Journal of Environmental Sciences 1998年第1期10卷 45-50页

作者： Wang Ying yan, Wang Jin guang Beijing Municipal Research Institute of Environmental Protection,Beijing 100037,China Ma Yu qin, Su Zhen, Zhao Kai jian, Zhang Zhong lun, Zheng Yan zhen, Liu Cheng xian Institute of Biophysics,Chinese Academy of Scie

The kinetics of low level chemiluminescence from Chinese white polpar leaf smoked by CO and two gaseous mixture of SO 2 and CO or SO 2, NO x and CO, and their luminescence intensity formula were described. The comparison of the results indicated that three kinds of the gaseous compounds could cause no changes of the substantial nature of foliar biophoton emission. However, they made the luminescence intensity, including I o (1) and I o (2) , altered in a certain degree, and the changes caused by the fumigation of CO and the mixed gas of SO 2 and CO were different from that made by the gaseous mixture of SO 2, NO x and CO in τ′ and τ″ of the photo induced luminescence from plant leaf.

关键词： kinetics low level chemiluminescence plant leaf air pollutants.

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Mechanical Characteristics of Typical plant Leaves

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Journal of Bionic Engineering 2010年第3期7卷 294-300页

作者： Shujie Wang, Luquan Ren, Yan Liu, Zhiwu Han, Yue Yang The Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun 130022, P. R. China The Key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University Changchun P. R. China

plant leaf is a natural composite biomaterial, and its strength is closely related to the microstructure. In this paper, themechanical characteristics of eight species of plant leaves were investigated and analyzed. The ultimate strength of leaves andthe hardness of leaf surfaces were measured by using universal testing machine and nanoindenter tester, respectively. The tensilestrength of the parallel microstructure was investigated based on its cross-sectional mechanical model. The results of tensiontests indicate that the ultimate strength of a leaf is related to the material composition and structure. The coriaceous leavesusually exhibit higher tensile strength. For example, the Phyllostachys pubescens leaf can achieve the maximum ultimatestrength of 5.9091 N·mm. It is concluded from the results of hardness tests that material components of leaf surface caninfluence the surface hardness evidently. The leaf surface composed of more lignin and cellulose materials shows a highersurface hardness than that composed of more carbohydrates materials.

关键词： bionics plant leaf hardness tensile strength

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Thermo-sensitive Porous Polymer Membrane-immobilized Cellulose as a Switchable Enzyme Reactor for Tuning Its Enzymolysis via Variation Temperature

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Chemical Research in Chinese Universities 2023年第6期39卷 992-997页

作者： QIAO Juan ZHANG Xinya CHENG Cheng QI Li Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living BiosystemsInstitute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049P.R.China School of Pharmacy Xinxiang Medical UniversityXinxiang 453003P.R.China College of Chemistry&Environmental Science Hebei UniversityBaoding 071002P.R.China

Immobilization of enzymes onto porous membranes has attracted considerable attention in recent ***,enhancing the enzymolysis efficiency of the resulting enzyme reactors by varying the environmental conditions poses a great *** this work,poly(styrene-maleic anhydride-N,N-dimethylacrylamide)was prepared and utilized to construct a thermo-sensitive porous polymer membrane-based enzyme reactor(TS-PPMER)after cellulase was immobilized onto the support by covalent *** catalytic activity of the nano-reactor was evaluated by measuring the yield of the product,glucose,at different temperatures with carboxymethylcellulose as the ***,the polymer chains coiled and formed numerous nano-pores at a high temperature,which induced the confine effect and greatly boosted the enzymolysis efficiency of ***,the proposed TS-PPMER was applied in the hydrolysis of green plant leaves in Epipremnum *** work shows great potential in obtaining biological resources by an environmentally friendly approach using smart polymer-based nano-reactors.

关键词： Thermo-sensitive porous polymer membrane Cellulase reactor Catalytic efficiency Glucose plant leaf

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