Time filter

Source Type

Cangzhou, China

Hao X.,Yanshan University | Xu Y.,Yanshan University | Li Z.,Yanshan University | Wang L.,Cangzhou Medical College | And 2 more authors.
Physica Status Solidi (B) Basic Research | Year: 2011

First-principles calculations are preformed to investigate the structural, elastic, and electronic properties of Re2N and Re3N. Based on the calculated bulk modulus and shear modulus of polycrystalline aggregates, Re2N and Re3N can be regarded as potential candidates of ultraincompressible and hard materials. The calculated anisotropic factors showed that Re2N and Re3N possess high elastic anisotropic. The structural analysis and electron-density analysis reveal the covalent bonding between the rhenium atoms and the nitrogen atoms as the driving force of the high bulk/shear modulus; meanwhile, the anisotropy can be understood in terms of atomic arrangements along the different axis. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Shufeng Z.,Cangzhou Medical College | Zhaolin Z.,Cangzhou Infectious Disease Hospital | Haijie W.,Cangzhou 2nd Middle School
Chemistry Bulletin / Huaxue Tongbao | Year: 2012

The titled complex was synthesized by hydrothermal method, and the in vitro antibacterial activities of the as-synthesized complex for Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa, Candida albicans were investigated by susceptibility testing using the solid medium plate. The results showed that the Fe complex of enoxacin exhibits antibacterial activity, but the activities were stronger than that of the ligand itself against Staphylococcus aureus and Pseudomonas aeruginosa only.

Hou Z.-J.,Cangzhou Medical College
World Chinese Journal of Digestology | Year: 2010

AIM: To study the correlation of liver function and red blood cell parameters with repeat drinking in alcohol-dependent patients. METHODS: Three hundred and twelve alcohol-dependent patients and 40 normal subjects were selected and compared in this study. The investigation included general state of health as well as liver function and red blood cell parameters. The correlation of liver function and red blood cell parameters with alcohol consumption and drinking time was then analyzed. RESULTS: Compared with normal controls, alanine transaminase (ALT), aspartate transaminase (AST), gamma-glutamyl transpeptidase (GGT), cholylglycine (CG), mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) rose significantly, and hematocrit declined significantly in alcohol-dependent patients (all P < 0.001). The changes in these parameters are correlated with alcohol consumption and drinking time (r = 0.61 and 0.59, respectively; both P < 0.01). CONCLUSION: Repeat drinking may result in abnormal liver function and red blood cell parameters in alcohol-dependent patients. Dynamic monitoring of GGT, ALT and AST is conducive to the diagnosis of alcoholic liver disease. MCV can be used as a parameter for evaluation of dangerous alcohol drinking.

Li Y.,Hengshui University | Wu Y.,Cangzhou Medical College | Zheng H.,Hengshui University | Jiang W.,Hengshui University | Gao Z.,Hengshui University
2015 7th International Conference on Advanced Computational Intelligence, ICACI 2015 | Year: 2015

Aim to let the intelligent robot could quick, accurately identify and locate tennis, a new method of tennis recognition is proposed in this paper based on color and shape. First, more independent goals image are removed through color filter method and image filter method with taking advantage of Matlab processing functions. Secondly, corner pixels were extracted to complete stereovision matching in order to obtain tridimensional information of position and shape under the extreme constraints. Sufficient experiments of tennis recognition show that the algorithm which is based on single tennis characteristic has poor accuracy with parallax positioning accuracy of 76%, distance accuracy of 71% and color accuracy of 67%. However, accuracy of the algorithm which bases on three characteristics reaches 91%. The results show that the algorithm has higher robustness and tennis position can be located and distinguished more effectively, work efficiency is therefore enhanced for the intelligent robot. © 2015 IEEE.

Zheng X.-M.,Beijing University of Chemical Technology | Du L.-Y.,Cangzhou Medical College | Ma Y.-H.,Beijing University of Chemical Technology | Liu L.-Y.,Beijing University of Chemical Technology | Yang W.-T.,Beijing University of Chemical Technology
Acta Polymerica Sinica | Year: 2014

To increase number of labile sites on PVC and thus facilitate grafting from PVC by aids of free radical polymerization (FRP) under mild conditions, self-initiated, or bi-isopropyl thioxanthone (BIITX) and isopropylthioxanthone (ITX) initiated FRP of vinyl chloride (VC) in THF at 0 °C or 20 °C was carried out under UV irradiation. Influences of monomer concentration, incident light intensity, reaction time and temperature on monomer conversion, polymer molecular weight and its distribution were investigated. Radical ITX produced by dissociation of BIITX or by H abstraction of ITX from monomer could combine with a macroradical. This allowed ITX residues to be incorporated onto PVC via weak C-C bonds which could be cleaved easily to regenerate radicals under UV light or heat stimuli, and thus yielded new labile sites on PVC for initiation. UV-Vis, 1H-NMR and FTIR spectra analyses demonstrated the presence of labile chlorines and ITX residues on the resultant PVC, and indicated that PVC resulted from self-initiated or ITX initiated FRP contained great labile sites. Using the PVC as a macroinitiator, grafting polymerization of N, N-dimethylaminoethyl methacrylate (DMAEMA) in THF at 50 °C was started, and PVC-based graft copolymer (PVC-g-PDMAEMA) was synthesized. Compared with the initial PVC used, the graft copolymer achieved an increased molecular weight and narrowed molecular weight distribution. 1H-NMR and FTIR analyses further confirmed the formation of PVC-based graft copolymer, and revealed that more labile chlorines or ITX residues on PVC favored initiation of graft polymerization. SEM and TEM observations showed that the graft copolymers containing more than 15 mol% (analyzed by 1H-NMR) of PDMAEMA segments could assemble into stable core-shell micelles in water (pH 3). The grafted hydrophilic PDMAEMA stretched towards aqueous media, forming the shell, while hydrophobic PVC portion coiled up to the core. This phenomenon suggested an amphiphilicity of the graft copolymers. In contrast, the copolymer with less content (only 0.15%) of grafted PDMAEMA could not form micelles due to its insufficient amphiphilicity.

Discover hidden collaborations