作者机构：
[Wang Dong-sheng] Cent S Univ, Engn Ctr Screening Tradit Chinese Med, Inst Integrated Chinese & Western Med, Xiangya Hosp, Changsha 410008, Peoples R China.;[Li Jian-guo] Cent S Univ, Natl Hepatobiliary & Enter Surg Res Ctr, Changsha 410008, Peoples R China.;[Li He-ping] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410114, Peoples R China.
通讯机构：
[Wang Dong-sheng] C;Cent S Univ, Engn Ctr Screening Tradit Chinese Med, Inst Integrated Chinese & Western Med, Xiangya Hosp, Changsha 410008, Peoples R China.
摘要：
In order to synthesize the targeting drug carrier system, magnetic chitosan-5-fluorouracil nano-particles were prepared by using 5-fluorouracil (5-Fu) as model drug, Fe_3O_4 nano-particles as kernel, chitosan as enveloping material and glutaraldehyde as cross linking agent through ultrasonic technique. The morphology of the magnetic chitosan-5-Fu nano-particles was observed with a transmission electron microscope(TEM). The results showed that magnetic chitosan-5-Fu nano-particles were prepared in spherical structure with a size range of 50-60 nm. The delivering capacity and drug releasing properties of magnetic chitosan-5-Fu nano-particles were investigated by UV-vis spectrum analysis. The results showed that the loading capacity was 13.4% and the cumulative release percentage in the phosphate buffer (pH=7.2) solutions was 68% in 30 h. These data indicate that the wrapped drug of magnetic chitosan-5-Fu nano-particles was slowly-released. The magnetic response of magnetic chitosan-5-Fu nano-particles was studied by UV-vis spectrometer to detect the changes of solution absorbance. Without external magnetic field, the nano-particle deposition rate was slow. When being subjected to 8 mT magnetic field, the particle sedimentation rate was increased rapidly. The results showed that magnetic chitosan-5-Fu nano-particles have a magnetic stability and strong targeting characteristics.
摘要：
TiO_2 photocatalysts compounded with WO_3 were prepared via a modified hydrolysis process and the 2% WO_3-TiO_2 catalysts with different oxygen vacancies were obtained by calcination at 873 K in H_2 atmosphere.The catalysts were identified using X-ray diffractometry (XRD),specific surface measurement (BET),electron paramagnetic resonance spectroscopy (EPR),UV-Vis diffusion refraction spectroscopy (DRS),and X-ray photoelectron spectroscopy (XPS).The photocatalytic activity of 2% WO_3-TiO_2 with different oxygen vacancies was investigated employing splitting of water for O_2 evolution.The results indicate that appropriate oxygen vacancies can obviously improve the photocatalytic activity of 2% WO_3-TiO_2 catalysts,and using Fe~(3+) as an electron acceptor under UV irradiation in 12 h,the maximum rate for O_2 evolution is 667 μmol/(L·h).
摘要：
The title compound, C19H13BrFN, was synthesized by N-alkyl-ation of 1-chloro-methyl-4-fluoro-benzene with 3-bromo-9H-carbazole. The carbazole ring system is essentially planar (r.m.s. deviation of 0.024 Å for the non-H atoms) and forms a dihedral angle of 88.2 (3)° with the benzene ring.
作者机构：
School of Chemistry and Biological Engineering, Changsha University of Science andTechnology, Changs;Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P.R.China
会议名称：
4th International Symposium on Animal Nutrition,Health and Feed Additive(第四届动物营养、保健与饲料添加剂国际学术研讨会)
会议时间：
2009-07-04
会议地点：
广州
会议论文集名称：
4th International Symposium on Animal Nutrition,Health and Feed Additive(第四届动物营养、保健与饲料添加剂国际学术研讨会)论文集
摘要：
In this paper, the optical biochips based on cap-shaped gold nano-particles have been constructed by evaporating gold on polystyrene and silica microspheres to form Au caps, which show a novel localized surface plasmon resonance (LSPR). The gold surface on silica spheres modified with a carboxymethyl dextran layer was used for sensing of anti-avidin D with a detection limit of 5 nmol·L-1 and a sensitivity of 3.4 × 10.3 nm·L·nmol-1, which was based on surface-bound avidin molecule. Furthermore, a double stranded DNA (dsDNA) with a binding site of hexa sequence AGGTCA for a nuclear receptor, retinoid X receptor beta (RXRβ), has been successfully immobilized on gold surface via a specific interaction between biotin moiety and streptavidin, and applied to selective recognition of small molecule nuclear ligands like 9-cis retinoic acid.
摘要：
A single-chamber, membrane-less and floating-cathode microbial fuel cells (MFC) was successfully started up using surplus sludge as fuel without adding carbohydrate after 20 days. The electricity generation of the MFC was investigated. The results showed that the obtained maximum voltage was 440.7 mV when external resistance was 1,000 Omega. There were four phases (rapid fall phase, stationary phase, fall phase and stationary phase of low voltage) in the periodic time of MFC, and the output voltage range of 150-300 mV lasted for 107 hours during stationary phase. In addition, the obtained maximum power density was 220.7 mW m(-2) and internal resistance was 368.13 Omega in the MFC. Consequently, surplus sludge could be used to generate electricity in MFC, which could provide a novel process for sludge recycling.
会议名称：
The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)
会议时间：
2009-06-11
会议地点：
北京
会议论文集名称：
The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)论文集
关键词：
White rot fungi;Pentachloronitrobenzene;Degradation;Kinetics model
摘要：
Degradation Pentachloronitrobenzene of industrial wastewater by white rot fungi was researched. The experimental conditions were optimized by L-9(3(4)) orthogonal test. The experimental result shows that the biochemical temperature is the most important factor, and then are biochemical time and pH and concentration of COD of water sample at inlet respectively, its best experimental condition is that biochemical is 25 degrees C, pH=7, biochemical is 48d, and the concentration of water sample at inlet is 2000 mg center dot L-1. And then the comparative experiments of PCNB degradation efficiency at different experimental conditions were carried out. The results show that the degradation efficiency of PCNB can be greatly promoted, and the highest PCNB degradation efficiency is 99.87% at 60d and it is about 78% higher than that of without white rot fungi wastewater sample. Finally, the comparative experiments of PCNB degradation rate was carried out. The results show that the PCNB degradation by white rot fungi is accord with Monod kinetics model when PCNB concentration in wastewater sample is below 116mg/L, and there is the highest PCNB degradation rate(V-max), and the V-max is 5.49 mg center dot L-1 center dot d(-1).
