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Weiqiang Kong,Qiuwan Shen,Jiadong Liao,Ziheng Jiang,Naibao Huang,Guogang Yang,Shian Li 한양대학교 청정에너지연구소 2024 Journal of Ceramic Processing Research Vol.25 No.2
A three-dimensional numerical model of a methanol steam reforming micro-channel reactor for hydrogen production based onCu/ZnO/Al2O3 catalyst was established. The effects of different inlet mass flow rate, reaction temperature and steam to carbonratio (S/C) on the mass change of each component, chemical reaction rate and hydrogen production performance of microchannelreformer were studied. The results show that with the increase of inlet mass flow rate, the mass fraction of CH3OH atthe outlet of reforming channel increases gradually, and the methanol conversion rate decreases gradually. The mass fractionof CO at the outlet of reforming channel decreases gradually, and the CO selectivity decreases gradually. With the increase ofreaction temperature, the mass fraction of CH3OH at the outlet of reforming channel decreases gradually, and the methanolconversion rate increases. The mass fraction of CO at the outlet of reforming channel increases rapidly, and the CO selectivityincreases rapidly. With the increase of S/C, the methanol conversion rate increased and the CO selectivity decreased. In thisstudy, the influence of reaction conditions on methanol reformer was obtained, and the reasons behind it were clarified, whichprovided more valuable insights for the operating conditions of hydrogen production from MSR.
Yuan, Gu,Xiao, Junhua,Huang, Weiqiang,Tang, Feili,Zhou, Yawei The Pharmaceutical Society of Korea 2002 Archives of Pharmacal Research Vol.25 No.5
Three hairpin polyamides were designed and synthesized by a haloform reaction and DCC/HOBt coupling reaction without amino protection and deprotection. Their anticancer activity were investigated with three kinds of cell lines-hepatic carcinoma, lung carcinoma and gastric carcinoma, and the values of $IC_{50}$ were at range of $10^{-7}~10^{-8}M$.
Ye Yuanjian,Zhong Haobo,Huang Shoubin,Lai Weiqiang,Huang Yizhi,Sun Chunhan,Zhang Yanling,Zheng Shaowei 한국조직공학과 재생의학회 2023 조직공학과 재생의학 Vol.20 No.6
BACKGROUND: Implantation of bone marrow mesenchymal stem cells (BMSCs) is a potential alternative for promoting bone defects healing or osseointegration in osteoporosis. However, the reactive oxygen species (ROS) accumulated and excessive inflammation in the osteoporotic microenvironment could weaken the self-replication and multi-directional differentiation of transplanted BMSCs. METHODS: In this study, to improve the hostile microenvironment in osteoporosis, Poloxamer 407 and hyaluronic acid (HA) was crosslinked to synthetize a thermos-responsive and injectable hydrogel to load MnO2 nanoparticles as a protective carrier (MnO2@Pol/HA hydrogel) for delivering BMSCs. RESULTS: The resulting MnO2@Pol/HA hydrogel processed excellent biocompatibility and durable retention time, and can eliminate accumulated ROS effectively, thereby protecting BMSCs from ROS-mediated inhibition of cell viability, including survival, proliferation, and osteogenic differentiation. In osteoporotic bone defects, implanting of this BMSCs incorporated MnO2@Pol/HA hydrogel significantly eliminated ROS level in bone marrow and bone tissue, induced macrophages polarization from M1 to M2 phenotype, decreased the expression of pro-inflammatory cytokines (e.g., TNFa, IL-1b, and IL-6) and osteogenic related factors (e.g., TGF-b and PDGF). CONCLUSION: This hydrogel-based BMSCs protected delivery strategy indicated better bone repair effect than BMSCs delivering or MnO2@Pol/HA hydrogel implantation singly, which providing a potential alternative strategy for enhancing osteoporotic bone defects healing.