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6 results on '"Chen, Hua-Han"'

3. Graphene oxide conjugated with polymers: a study of culture condition to determine whether a bacterial growth stimulant or an antimicrobial agent?

Author

Wu, Ping-Ching, primary, Chen, Hua-Han, additional, Chen, Shih-Yao, additional, Wang, Wen-Lung, additional, Yang, Kun-Lin, additional, Huang, Chia-Hung, additional, Kao, Hui-Fang, additional, Chang, Jui-Cheng, additional, Hsu, Chih-Li Lilian, additional, Wang, Jiu-Yao, additional, Chou, Ting-Mao, additional, and Kuo, Wen-Shuo, additional

Published
2018
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4. In-situ measurement of the dissolved S2− in seafloor diffuse flow system: sensor preparation and calibration

Author

Yiwen Pan, Wei Zhao, Chen-hua Han, Ying Ye, and Xia Huang

Subjects
chemistry.chemical_classification, Materials science, General Engineering, Analytical chemistry, Substrate (chemistry), Polymer, Reference electrode, Chemical reaction, Ion selective electrode, symbols.namesake, chemistry, Electrode, symbols, Calibration, Nernst equation
Abstract

The preparation approach and calibration result of an improved type of ion selective electrode (ISE), which is used to measure the total dissolved S2−, are introduced in this paper. The improved Ag/Ag2S electrode uses silver wire as the substrate, which is surrounded by electric polymer containing superfine silver powder. After the stabilization of the epoxy-resin, Ag2S layer was formed by chemical reaction with 0.2 mol/L (NH4)2S solution for 5 min. With Ag/AgCl as reference electrode, the Ag/Ag2S electrode can be used to measure dissolved S2−. The correlation between the measured potentials and the logarithm of dissolved S2− is found to be linear, within range of the concentration of dissolved S2− from 10−2∼10−7 mol/L. The slope of the regression line between measured potential and logarithm of dissolved S2− is about −27.7, which agrees well with the theoretical Nernst value −29.6. Furthermore, the performance of the improved Ag/Ag2S electrode, such as the response time, sensitivity and stability, greatly outweighs the conventional Ag/Ag2S electrode.

Published
2008

6. Rice bran feruloylated oligosaccharides activate dendritic cells via Toll-like receptor 2 and 4 signaling.

Author

Lin CC, Chen HH, Chen YK, Chang HC, Lin PY, Pan IH, Chen DY, Chen CM, and Lin SY

Subjects
Animals, B7-1 Antigen genetics, B7-1 Antigen immunology, Bone Marrow Cells cytology, Bone Marrow Cells metabolism, CD40 Antigens genetics, CD40 Antigens immunology, Cell Differentiation drug effects, Coumaric Acids chemistry, Dendritic Cells cytology, Dendritic Cells metabolism, Extracellular Signal-Regulated MAP Kinases genetics, Extracellular Signal-Regulated MAP Kinases immunology, Female, Gene Expression Regulation, Histocompatibility Antigens Class I genetics, Histocompatibility Antigens Class I immunology, Histocompatibility Antigens Class II genetics, Histocompatibility Antigens Class II immunology, Immunologic Factors isolation & purification, MAP Kinase Kinase 4 genetics, MAP Kinase Kinase 4 metabolism, Mice, Mice, Inbred C3H, Mice, Inbred C57BL, NF-kappa B genetics, NF-kappa B metabolism, Oligosaccharides isolation & purification, Oryza chemistry, Signal Transduction, Toll-Like Receptor 2 immunology, Toll-Like Receptor 4 immunology, p38 Mitogen-Activated Protein Kinases genetics, p38 Mitogen-Activated Protein Kinases metabolism, Bone Marrow Cells drug effects, Dendritic Cells drug effects, Immunologic Factors pharmacology, Oligosaccharides pharmacology, Toll-Like Receptor 2 genetics, Toll-Like Receptor 4 genetics
Abstract

This work presents the effects of feruloylated oligosaccharides (FOs) of rice bran on murine bone marrow-derived dendritic cells (BMDCs) and the potential pathway through which the effects are mediated. We found that FOs induced phenotypic maturation of DCs, as shown by the increased expression of CD40, CD80/CD86 and MHC-I/II molecules. FOs efficiently induced maturation of DCs generated from C3H/HeN or C57BL/6 mice with normal toll-like receptor 4 (TLR-4) or TLR-2 but not DCs from mice with mutated TLR4 or TLR2. The mechanism of action of FOs may be mediated by increased phosphorylation of ERK, p38 and JNK mitogen-activated protein kinase (MAPKs) and increased NF-kB activity, which are important signaling molecules downstream of TLR-4 and TLR-2. These data suggest that FOs induce DCs maturation through TLR-4 and/or TLR-2 and that FOs might have potential efficacy against tumor or virus infection or represent a candidate-adjuvant approach for application in immunotherapy and vaccination.

Published
2014
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