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Yue Lin,Wang Jing,Pan Kang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. Ag^+ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.
Enhanced electrochemical oxidation of dye wastewater with Fe2O3 supported catalyst
Lin Yue,Jianbo Guo,Kaihong Wang,Jingliang Yang,Xiao Luo,Jing Lian,Li Wang 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
Electrochemical oxidation of Acid Red 3R was investigated in the presence of Fe2O3/γ-Al2O3 as Fenton-like catalyst in the reactor. The results showed that the catalyst had catalytic activity in theelectrochemical process. Under the optimal conditions, the decolorization efficiency reached 77.2% in100 min. UV–vis spectrum and LC–MS analysis revealed that the dye molecule was firstly decomposed toaromatic intermediates, further degraded to ring opening products and finally mineralized. The azo dyedegradation might be attributed to strong oxidant -OH that produced from the synergetic effect ofbetween Fe2O3/γ-Al2O3 catalyst and electrochemical system.
Lin Yue,Jianbo Guo,Jingliang Yang,Jing Lian,Xiao Luo,Xiangning Wang,Kaihong Wang,Li Wang 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
The electrochemical oxidation of dye wastewater with the cathode modified by quinones has beeninvestigated. Under the optimal conditions, the decolorization efficiency can reach 96.0% after 120 min. The addition of tert-butanol significantly decreased the decolorization efficiency, suggesting theinvolvement of -OH radicals in the decomposition of H2O2. A potential difference may result in a quinoneradical on the cathode which can catalyze the reduction of O2 to H2O2. UV–vis spectrum and GC/MSanalysis revealed that the dye molecule was firstly initiated by the cleavage of –N55N–, and decomposedto aromatic intermediates, further degraded to ring opening products and finally mineralized.
Synthesis of Ag/TiO_2 Core/Shell Nanoparticles with Antibacterial Properties
Yue Lin,Wang Qiqiang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui,Dong Yuming 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/TiO_2 core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and Ti(SO_4)_2 as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with N_2H_4·H_2O in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the Ti(SO_4)_2 solution deposited on the surface of Ag nanoparticles to form the Ag/TiO_2 core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/TiO_2 core/shell nanoparticles. The Ag/TiO_2 core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Lin, Yue,Jing, Wang,Kang, Pan,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. $Ag^+$ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.
Synthesis of Ag/TiO<sub>2</sub> Core/Shell Nanoparticles with Antibacterial Properties
Lin, Yue,Qiqiang, Wang,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia,Yuming, Dong Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/$TiO_2$ core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and $Ti(SO_4)_2$ as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with $N_2H_4{\cdot}H_2O$ in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the $Ti(SO_4)_2$ solution deposited on the surface of Ag nanoparticles to form the Ag/$TiO_2$ core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/$TiO_2$ core/shell nanoparticles. The Ag/$TiO_2$ core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Peptidoglycans Promotes Human Leukemic THP-1 Cell Apoptosis and Differentiation
Wang, Di,Xiao, Pei-Ling,Duan, Hua-Xin,Zhou, Ming,Liu, Jin,Li, Wei,Luo, Ke-Lin,Chen, Jian-Jun,Hu, Jin-Yue Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12
The innate immune system coordinates the inflammatory response to pathogens. To do so, its cells must discriminate self from non-self utilizing receptors that identify molecules synthesized exclusively by microbes. Toll-like receptors have a crucial role in the detection of microbial infection in mammals and insects. In mammals, they have evolved to recognize conserved products unique to microbial metabolism. These include lipopolysaccharide (LPS), lipotechoic acids, and peptidoglycans (PGN). We show here that TLRs, including TLR2, are expressed on the THP-1 human leukemia cell line. Activation of TLR2 signaling in THP-1 by PGN induces the synthesis of various soluble factors and proteins including interleukin-$1{\beta}$, interleukin-8 and TNF-${\alpha}$ and apoptosis of THP-1 with PGN dose and time dependence. Moreover, in this study we show that PGN induces apoptosis of THP-1 cells in a TNF-${\alpha}$-dependent manner. These findings indicate that TLR2 signaling results in a cascade leading to tumor apoptosis and differentiation, which may suggest new clinical prospects using TLR2 agonists as cytotoxic agents in certain cancers.
Yue Zhao,Meng-Fei Zhao,Mei-Lin Yang,Tian-Yu Wu,Cong-Jian Xu,Jing-Mei Wang,Chao-Jun Li,Xi Li 대한암학회 2020 Cancer Research and Treatment Vol.52 No.3
Purpose: While numerous epidemiological studies have indicated that omega-3 polyunsaturated fatty acids have anticancer properties in various cancers, the effects and mechanisms of eicosapentaenoic acid (EPA) in ovarian cancer cell growth are poorly understood. Materials and Methods: ES2 ovarian clear cell carcinoma cells and SKOV3 adenocarcinoma cells were treated with palmitic acid or EPA, followed by flow cytometry and cell counting to measure apoptosis and proliferation, respectively. A modified protein lipid overlay assay was used to further verify whether EPA was a ligand of G protein–coupled receptor 30 (GPR30) in ES2 cells. The levels of apoptosis-related genes, phosphorylated AKT, and phosphorylated ERK1/2 were detected to explore the underlying mechanism. Finally, inhibitory effect of EPA on tumor growth via GPR30 was determined in vitro and in vivo. Results: EPA suppressed ES2 ovarian clear cell carcinoma cells growth via GPR30, a novel EPA receptor, by inducing apoptosis. As a ligand of GPR30, EPA activated the GPR30-cAMP– protein kinase A signaling pathway. When GPR30 was suppressed by siRNA or its inhibitor G15, the antiproliferative action of EPA was impaired. Furthermore, EPA inhibited tumor growth by blocking the activation of AKT and ERK. In the mouse xenograft model, EPA decreased tumor volume and weight through GPR30 by blocking tumor cell proliferation. Conclusion: These results confirm that EPA is a tumor suppressor in human ovarian clear cell carcinoma cells and functions through a novel fatty acid receptor, GPR30, indicating a mechanistic linkage between omega-3 fatty acids and cancers.
Vibro-acoustic modelling of immersed cylindrical shells with variable thickness
Wang, Xianzhong,Lin, Hongzhou,Zhu, Yue,Wu, Weiguo The Society of Naval Architects of Korea 2020 International Journal of Naval Architecture and Oc Vol.12 No.-
Based on the Precise Transfer Matrix Method (PTMM), the dynamic model is constructed to observe the vibration behaviour of cylindrical shells with variable thickness by solving a set of first-order differential equations. The free vibration of stiffened cylindrical shells with variable thickness can be obtained to compare with the exact solution and FEM results. The reliability of the present method of free vibration is well proved. Furthermore, the effect of thickness on the vibration responses of the cylindrical shell is also discussed. The acoustic response of immersed cylindrical shells is analyzed by a Pluralized Wave Superposition Method (PWSM). The sound pressure coefficient can be gained by collocating points along the meridian line to satisfy the Neumann boundary condition. The mode convergence analysis of the cylindrical shell is carried out to guarantee calculation precision. Also, the reliability of the present method on sound radiation is verified by comparing with experimental results and numerical results.