Jin S.-L.,Jilin University |
Jin S.-L.,Huangshan University |
Yin Y.-G.,Jilin University
Food and Chemical Toxicology | Year: 2012
Objective: The aim of this thesis is to explore antioxidant activity of total flavonoids extracted from indocalamus leaves. Method: Aging mice model was established by D-galactose induction. Three groups of mice were treated with total flavonoids extracted from indocalamus leaves at doses of 20, 40 and 80. mg/kg. d. bw respectively. The antioxidant status in the aging mice was measured by determining the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT) and total anti-oxidant capability (T-AOC) in the serum and liver and malondialdehyde (MDA) content in the serum, liver and brain. Results: Compared with control group, extracts of indocalamus leaves significantly enhanced activities of SOD, GSH-Px, CAT in the serum and liver, and decreased MDA content in the serum, liver and brain at the tested doses. Conclusion: Total flavonoids extracted from indocalamus leaves demonstrated the potent antioxidant activity. © 2012 Elsevier Ltd.
Yang W.-W.,Ningxia University |
Chen P.,Huangshan University
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology | Year: 2013
To reveal the influence of both welded and non-welded hidden weld seam of unstiffened overlapped CHS(circular hollow sections) K-joints on the seismic performance of joints, the construction technology of such joints was optimized. According to such key parameters as β, γ and τ which affect the unstiffened overlapped CHS K-joints in steel tubular structure, both basic and parametric specimens were designed. With the ANSYS nonlinear finite element method, the numerical simulation for welded and non-welded hidden weld seam of unstiffened overlapped CHS K-joints in steel tubular structure was performed. In addition, the hysteretic loops, skeleton curves and such seismic resistance indexes as ductility were obtained. The results indicate that the variation of such parameters as β, γ and τ has no significant effect on the bearing capacity of joints. The hysteretic performance and ductility of joints with non-welded hidden weld seam are superior to those of joints with welded hidden weld seam. The bigger the brace-to-chord diameter ratio β, the better the ductility of joints is. The larger the chord diameter to thickness ratio γ, the poorer the ductility of joints is. The brace-to-chord thickness ratio τ has less effect on the ductility of joints, and especially has no effect on the ductility of joints with non-welded hidden weld seam.
Shi M.,Anhui University of Science and Technology |
Sun C.,Anhui University of Science and Technology |
Jiang F.,Huangshan University |
Yan X.,Huangshan University |
Du J.,Anhui University of Science and Technology
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012
We present a complete treatment for the quantum discord of two-qubit X states, by developing a geometric picture of a quantum steering ellipsoid. It is shown that either a von Neumann measurement or a three-element positive-operator-valued measurement is optimal. The condition for the latter is obtained and expressed in geometric language. We show, by using analytical as well as numerical results, that there is a systematic structure in the optimal decomposition which exists in a class of states including the X states. More significantly, we establish the relation to the quantum channel by identifying the steering ellipsoid with the quantum channel ellipsoid. Thus the quantum discord and classical correlation are closely related to the concept of the entanglement entropy of the quantum channel. © 2012 American Physical Society.
Qian L.,Huangshan University |
Ma M.,Huangshan University |
Cheng D.,Huangshan University
Journal of Molecular Liquids | Year: 2014
It is demonstrated that nanoparticles are ubiquitous in subsurface sediments; therefore, investigation of the adsorption and desorption of U(VI) on nanoparticles plays vital role in the understanding of the fate and transport of U(VI) in sub-sediment at their initial sources. The nano-alumina was synthesized by self-assemble method and was characterized by TEM, XRD and potentiometric titration. The characteristic results revealed the presence of nanoscale space confinement effect of nano-alumina. The batch adsorption of U(VI) on nano-alumina was carried out under various water chemistry such as reaction time, pH, ionic strength, initial U(VI) concentration and temperature. The maximum adsorption capacity of nano-alumina and alpha-alumina calculated from Langmuir model at pH 4.5 and T = 298 K are 92.59 and 59.88 mg/g, respectively. Approximately 35% and 5% of U(VI) are desorbed from alpha-alumina and nano-alumina at 48 h in the presence of 0.01 M NaHCO3 solution, which indicate that the nano-alumina presents the strong chemical affinity for U(VI) as compared to alpha-alumina. This study implies that nano-alumina could be as a promising adsorbent to remove the U(VI) from aqueous solutions. © 2014 Elsevier B.V.
Jin S.,Huangshan University
MATEC Web of Conferences | Year: 2016
Different biomaterials have been used as scaffolds for bone tissue engineering. The purpose of the study was to analyze the effect of bovine bone collagen to the porosity, water retention, degradation rate and biomechanical characteristics of composite scaffolds. Methods: Bovine bone collagen solution was mixed with cellulose nanofibers solution, and then the mixture was added a certain quality of hydroxyapatite. We divided the mixture into two groups according to the different bovine bone collagen solution mass fraction: No.1 (0 % bovine bone collagen), No.2 (50 % bovine bone collagen). The surface structure and the pore size was observed under the Scanning electron microscopic. Then we calculated the porosity, degradation rate, water content and biomechanical properties. Results: Two groups of scaffold materials showed a multi-pore structure. The average pore size were 133.4 ±13.5 μm and 221.7 ± 16.8μm. The porosity was (91.65 ±1.75) % and (85.42 ±1.48) %. Statistical analysis showed that two groups of material porosity difference were statistically significant (P<0.05). The degradation rates of two groups of scaffold materials at six weeks were (60.25±1.81) % and (23.16±1.027) %. Statistical analysis showed that the degradation rate of the material differences between the two groups were statistically significant (P<0.05). Water content of two groups of scaffold materials was (97.44±0.98 % and (91.36±0.77) %. Statistical analysis showed that the water content of the material differences between the two groups were statistically significant (P<0.05). Biomechanical properties of the second group increased significantly. Conclusion: It could be seen from the experimental data that bovine bone collagen could increase the pore size, improved stability to degradation and the biomechanical strength of materials. Therefore, the biocomposite studied has several characteristics considered as ideal for its use as a scaffold for osteoconduction and osteoinduction. © The Authors, published by EDP Sciences, 2016.
Niu J.,Huangshan University |
Wang A.,Huangshan University |
Ke Z.,Huangshan University |
Zheng Z.,Huangshan University
Journal of Drug Targeting | Year: 2014
In this study, glucose transporter and folic acid (FA) receptor-mediated Pluronic P105 polymeric micelles loaded with DOX (GF-DOX) were prepared for enhancing the blood-brain barrier (BBB) transportation and improving the drug accumulation in the glioma cells. The pH-triggered DOX release of GF-DOX indicating a comparatively fast drug release at weak acidic condition and stable state of the carrier at physiological environment. The transport of GF-DOX across the in vitro BBB model showed that GF-DOX exhibited higher BBB transportation ability with the transporting ratio of 21.47% in 4 h. The carrier was internalized into C6 glioma cells upon crossing the BBB model for the combined effect of the brain targeting by transportation of glucose transporter and active tumor cell targeting by FA receptor-mediated endocytosis. Moreover, minimized weight changes and high suppression ratio of tumor growth were observed after intravenous injection of GF-DOX. In conclusion, the glucose transporter and FA dual-targeting micelles would provide a safe and effective strategy for new modalities to treat brain tumor. © 2014 Informa UK Ltd. All rights reserved.
Xi Z.,East China University of Science and Technology |
Li C.,Huangshan University |
Zhang L.,East China University of Science and Technology |
Xing M.,East China University of Science and Technology |
Zhang J.,East China University of Science and Technology
International Journal of Hydrogen Energy | Year: 2014
Cu2O/TiO2 nanoparticles were prepared by solvothermal method, which formed the heterostructure of Cu2O/TiO2. Due to the heterostructure, the H2 evolution rate under simulated solar irradiation was increasingly promoted. Meanwhile a certain amount of Cu particles which were confirmed by Transmission Electro Microscopy (TEM) and X-Ray Photoelectron Spectroscopy (XPS), formed on the surface of Cu 2O/TiO2, and the photoactivity was accordingly further enhanced. The stabilized activity was maintained after many times irradiation. It is interesting that after a few hours irradiation the amount of Cu particles on the surface kept unchanged in the presence of Cu2O and TiO 2. The Cu particles that formed during hydrogen generation reaction play a key role in the further enhancement of the hydrogen production activity. In this study, it is the first time to study the details on the formation of the stable ternary structure under simulated solar irradiation and their synergistic effect on the photoactivity of the water splitting. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Qi Z.,Huangshan University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2016
A new dicopper complex [Cu2(L)(N3)2](ClO4)2·4H2O (1) with imidazole-containing macrocyclic polyamine ligand was synthesized, and characterized by elemental analysis, FT-IR, UV-Vis, TGA, single-crystal X-ray diffraction, and PXRD. Complex 1 crystallizes in monoclinic, space group P21/c. The coordination geometry around Cu(II) atom is five-coordinated distorted trigonal-bipyramid, and the imidazole-pendants and the azide anions are located on the different sides of the macrocyclic ligand. © 2016 Taylor & Francis Group, LLC.
Jiang H.,Huangshan University
Computers and Mathematics with Applications | Year: 2012
In this paper, we use the analytic semigroup theory of linear operators and the fixed point method to prove the existence of mild solutions for the semilinear fractional order functional differential equations with impulse in a Banach space. © 2011 Elsevier Ltd. All rights reserved.
Wang A.,Huangshan University
Acta Crystallographica Section E: Structure Reports Online | Year: 2012
The binuclear title compound, [Cu 2(C 7H 4N 3O 2) 4(C 3H 7NO) 2], is a discrete metal-organic compound having a paddle-wheeltype structure. The Cu···Cu distance is 2.6366(5) Å and an inversion center is located at the mid-point of this bond. The Cu II cation is coordinated by four carboxylate O atoms from four 4-azidobenzoate ligands, and one O atom from a dimethylformamide molecule, forming an overall distorted octahedral geometry when the Cu·· ·Cu bond is also considered.