Pectinase was immobilized onto chitosan support itsing glutaraldehyde as a coupling agent to obtain high activity and stability of pectinase.x A maximum residual activity of 55% was obtained with 0.4 mg proteirdg chit...Pectinase was immobilized onto chitosan support itsing glutaraldehyde as a coupling agent to obtain high activity and stability of pectinase.x A maximum residual activity of 55% was obtained with 0.4 mg proteirdg chitosan (w/w), 5% (v/v) g/utara/dehyde, and 4℃ for the crosslinking reaction. The optimal pH and temperature for pectinase activity changed from 3.0 and 40℃ to 3.5 and 50℃, respectively, after immobilization The immobilized enzyme exhibited higher stability under varying conditions of pH and temperature and better reusability than the free enzyme.展开更多
Acidic black 10B dye wastewater was treated by chemical oxidation and adsorption of activated carbon fixed bed and all kinds of influential factors of removal CODcr were discussed. When the initial concentration of th...Acidic black 10B dye wastewater was treated by chemical oxidation and adsorption of activated carbon fixed bed and all kinds of influential factors of removal CODcr were discussed. When the initial concentration of the dye was 150 mg/L, CODer was 432 mg/L and chrome was 2800 times, the appropriate conditions determined by the experiment were as follows: r(NaC10)--4.84 g/L, 25 min, pH=6, height of activated carbon fixed bed was 10 cm. Under these conditions, the decolorizing rate can come up to about 100% and total removed rate of CODer reached at 89.6%. Comparison of UV-Vis adsorption spectrums before and after treatment showed that decomposition effects of chemical oxidation and adsorption of activated carbon fixed bed on acidic black 10B dye wastewater were satisfactory.展开更多
This paper investigates controllability of discrete-time multi-agent systems with multiple leaders on fixed networks. The leaders are particular agents playing a part in external inputs to steer other member agents. T...This paper investigates controllability of discrete-time multi-agent systems with multiple leaders on fixed networks. The leaders are particular agents playing a part in external inputs to steer other member agents. The followers can arrive at any predetermined configuration by regulating the behaviors of the leaders. Some sufficient and necessary conditions are proposed for the controllability of discrete-time multi-agent systems with multiple leaders. Moreover, the case with isolated agents is discussed. Numerical examples and simulations are proposed to illustrate the theoretical results we established.展开更多
文摘Pectinase was immobilized onto chitosan support itsing glutaraldehyde as a coupling agent to obtain high activity and stability of pectinase.x A maximum residual activity of 55% was obtained with 0.4 mg proteirdg chitosan (w/w), 5% (v/v) g/utara/dehyde, and 4℃ for the crosslinking reaction. The optimal pH and temperature for pectinase activity changed from 3.0 and 40℃ to 3.5 and 50℃, respectively, after immobilization The immobilized enzyme exhibited higher stability under varying conditions of pH and temperature and better reusability than the free enzyme.
文摘Acidic black 10B dye wastewater was treated by chemical oxidation and adsorption of activated carbon fixed bed and all kinds of influential factors of removal CODcr were discussed. When the initial concentration of the dye was 150 mg/L, CODer was 432 mg/L and chrome was 2800 times, the appropriate conditions determined by the experiment were as follows: r(NaC10)--4.84 g/L, 25 min, pH=6, height of activated carbon fixed bed was 10 cm. Under these conditions, the decolorizing rate can come up to about 100% and total removed rate of CODer reached at 89.6%. Comparison of UV-Vis adsorption spectrums before and after treatment showed that decomposition effects of chemical oxidation and adsorption of activated carbon fixed bed on acidic black 10B dye wastewater were satisfactory.
基金Supported in part by the National Natural Science Foundation of China under Grant No. 61104140the Fundamental Research Funds for the Central Universities (HUST: Grant No. 2011JC055)+4 种基金the Research Fund for the Doctoral Program of Higher Education (RFDP) under Grant No. 20100142120023the Natural Science Foundation of Hubei Province of China under Grant No. 2011CDB042the Beijing Natural Science Foundation Program (1102016)the Science and Technology Development Plan Project of Beijing Education Commission(No. KM201310009011)Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (PHR201108055)
文摘This paper investigates controllability of discrete-time multi-agent systems with multiple leaders on fixed networks. The leaders are particular agents playing a part in external inputs to steer other member agents. The followers can arrive at any predetermined configuration by regulating the behaviors of the leaders. Some sufficient and necessary conditions are proposed for the controllability of discrete-time multi-agent systems with multiple leaders. Moreover, the case with isolated agents is discussed. Numerical examples and simulations are proposed to illustrate the theoretical results we established.