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Fabrication of Aligned PI/GO Nanofibers for Battery Separators
Qiong Tian,Qiuhong Liu,Kedong Song,Yufan Mei,Jinfeng Peng,Jinfeng Peng,Ji Zhou,Yanhuai Ding 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1
Highly aligned polyimide/graphene oxide (PI/GO) nanofibers were fabricated by using the electrospinning method. As a separator for Li-ion batteries, the PI/GO nanofibers show excellent thermal stability, good wettability toward organicliquid electrolytes and superior electrochemical performance compared to raw PI and commercial battery separators. TheGO nanosheets not only greatly enhance the mechanical strength of the PI matrix, but also increase the resistance to Lidendrites.
Li-Qiong Liao,Yi-Zheng Fu,Xiao-Yan Liang,Lin-Yu Mei,Yaqing Liu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.3
Molecular dynamics (MD) simulations have been used to study the diffusion behavior of small gas molecules (CO2) in polyethylene terephthalate (PET)/polylactide (PLA) blends. The Flory-Huggins interaction parameters (χ) determined from the cohesive energy densities are smaller than the critical value of Flory-Huggins interaction parameters (χcritical), and that indicates the good compatibility of PET/PLA blends. The diffusion coefficients of CO2 are determined via MD simulations at 298 K. That the order of diffusion coefficients is correlated with the availably fractional free volume (FFV) of CO2 in the PET/PLA blends means that the FFV plays a vital role in the diffusion behavior of CO2 molecules in PET/PLA blends. The slopes of the log (MSD) as a function of log (t) are close to unity over the entire composition range of PET/PLA blends, which confirmes the feasibility of MD approach reaches the normal diffusion regime of CO2 in PET/PLA blends.
New Triterpenoids from the Fruits of Schisandra wilsoniana and Their Biological Activities
Gao, Xue-Mei,Li, Yun-Qi,Shu, Li-Dan,Shen, Yan-Qiong,Yang, Li-Ying,Yang, Liu-Meng,Zheng, Yong-Tang,Sun, Han-Dong,Xiao, Wei-Lie,Hu, Qiu-Fen Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.3
Investigation of an organic extract of the fruits Schisandra wilsoniana led to the isolation of two new highly oxygenated nortriterpenoids, named schilancidilactones V-W (1-2). Their structures were elucidated by spectroscopic evidence. Compounds 1-2 feature a double bond between C-7 and C-8 compared with related known nortriterpenoids isolated from the genus Schisandra. Compounds 1 and 2 were tested for their anti-HIV-1 activities and cytotoxicity. The results revealed that compounds 1 and 2 showed moderate anti-HIV-1 activities with $EC_{50}$ 3.05 and 2.87 ${\mu}g/mL$, respectively, and compound 1 showed high cytotoxicity against KB and MDA-MB-231 cell with $IC_{50}$ values of 3.18 and 5.22 ${\mu}M$, respectively.
‘이중 탄소’ 목표 하의 중국 녹색 크레딧 문제에 관한 연구
王书琼 ( Shu-qiong Wang ),梅倩 ( Qian Mei ),구기보 ( Ki-bo Ku ) 한중사회과학학회 2024 한중사회과학연구 Vol.22 No.1
중국 정부는 ‘이중 탄소’의 목표를 제시하면서 중국 경제의 녹색발전을 유도하고 있으며, 그 과정에서 녹색금융은 녹색경제의 매우 중요한 원동력이다. 본 논문은 중국의 녹색 크레딧 발전 현황과 녹색 크레딧 제도의 문제점을 분석함으로써 향후 중국 녹색 크레딧의 발전 방향을 파악하고 향후 한중 협력방안을 도출하고자 하였다. 우선 중국 정부가 녹색 크레딧 관련 법률과 제도를 정비하는 과정에서 한중 양국 정부가 노하우를 공유하고 정보를 교환할 수 있을 것이다. 둘째, 한중 양국 상업은행이 녹색금융상품과 관련하여 정보를 교환하고 공동으로 개발하여 판매할 수 있을 것이다. 셋째, 한중 양국 상업은행이 건전한 인센티브제도와 사고 예방 메커니즘를 수립하도록 협력할 수 있을 것이다. 넷째, 한국은 중국에 녹색 크레딧 전문인력을 양성하도록 연수프로그램 제공하고 중국은 한국에 녹색금융 관련 정책 설명회에 초청할 수 있을 것이다. 마지막으로 녹색 크레딧과 관련된 국제협력을 강화할 수 있을 것이다. The Chinese government is inducing the green development of the Chinese economy by presenting the goal of ‘double carbon’, and green finance is a very important driving force of the green economy. By analyzing the current status of China’s green credit development and the problems of the green credit system, this paper attempted to grasp the direction of future development of Chinese green credits and derive future cooperation plans between Korea and China. First of all, the governments of both Korea and China will be able to share know-how and exchange information in the process of the Chinese government reorganizing laws and systems related to green credits. Second, commercial banks in both countries will be able to exchange information and jointly develop and sell green financial products. Third, commercial banks in both countries will be able to cooperate in establishing a sound incentive system and accident prevention mechanism. Fourth, Korea will be able to provide training programs to China to cultivate green credit experts, and China will be able to invite Korea to policy briefing sessions related to green finance. Finally, Korea and China will be able to strengthen international cooperation related to green credits.
Liao, Li-Qiong,Fu, Yi-Zheng,Liang, Xiao-Yan,Mei, Lin-Yu,Liu, Ya-Qing Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.3
Molecular dynamics (MD) simulations have been used to study the diffusion behavior of small gas molecules ($CO_2$) in polyethylene terephthalate (PET)/polylactide (PLA) blends. The Flory-Huggins interaction parameters (${\chi}$) determined from the cohesive energy densities are smaller than the critical value of Flory-Huggins interaction parameters (${\chi}_{critical}$), and that indicates the good compatibility of PET/PLA blends. The diffusion coefficients of $CO_2$ are determined via MD simulations at 298 K. That the order of diffusion coefficients is correlated with the availably fractional free volume (FFV) of $CO_2$ in the PET/PLA blends means that the FFV plays a vital role in the diffusion behavior of $CO_2$ molecules in PET/PLA blends. The slopes of the log (MSD) as a function of log (t) are close to unity over the entire composition range of PET/PLA blends, which confirmes the feasibility of MD approach reaches the normal diffusion regime of $CO_2$ in PET/PLA blends.
Tang, Zhen,Huang, Shu-Qiong,Liu, Jian-Ting,Jiang, Gui-Xiang,Wang, Chun-Mei Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Gecko is a kind of traditional Chinese medicine with remarkable antineoplastic activity. However, undefined mechanisms and ambiguity regarding active ingredients limit new drug development from gecko. This study was conducted to assess anti-angiogenic properties of the aqueous extracts of fresh gecko (AG) or macromolecular components separated from AG (M-AG). An enzyme-linked immunosorbent assay (ELISA) approach was applied to detect the vascular endothelial growth factor (VEGF) secretion of the tumor cells treated with AG or M-AG. The effect of AG or M-AG on vascular endothelial cell proliferation and migratory ability was analyzed by tetrazolium dye colorimetric method, transwell and wound-healing assays. Chick embryo chorioallantoic membrane (CAM) assays were used to ensure the anti-angiogenic activity of M-AG in vivo. The results showed that AG or M-AG inhibited the VEGF secretion of tumor cells, the relative inhibition rates of AG and M-AG being 27.2% and 53.2% respectively at a concentration of $20{\mu}L/mL$. AG and M-AG inhibited the vascular endothelial (VE) cell proliferation with IC50 values of $11.5{\pm}0.5{\mu}L/mL$ and $12.9{\pm}0.4{\mu}L/mL$ respectively. The VE cell migration potential was inhibited significantly (p<0.01) by the AG (${\geq}24{\mu}L/mL$) or M-AG (${\geq}12\mu}L/mL$) treatment. In vivo, neovascularization of CAM treated with M-AG was inhibited significantly (p<0.05) at a concentration of ${\geq}0.4{\mu}L/mL$. This study provided evidence that anti-angiogenesis is one of the anti-tumor mechanisms of AG and M-AG, with the latter as a promising active component.
Xi-Wu Gong,Xiao-Qiong Wang,You-Rong Li,Chun-Mei Wu 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
We present a novel coupled organic Rankine cycle (CORC) system driven by the low-grade waste heat, which couples a transcriticalorganic Rankine cycle with a subcritical organic Rankine cycle. Based on classical thermodynamic theory, a detailed performance analysison the novel CORC system was performed. The results show that the pressure ratio of the expander is decreased in the CORC and theselection of the working fluids becomes more flexible and abundant. With the increase of the pinch point temperature difference of theinternal heat exchanger, the net power output and thermal efficiency of the CORC all decrease. With the increase of the critical temperatureof the working fluid, the system performance of the CORC is improved. The net power output and thermal efficiency of the CORCwith isentropic working fluids are higher than those with dry working fluids.
Yi-Chun Wang,Qiong Chen,Jun-Ming Luo,Jing Nie,Qing-He Meng,Wei Shuai,Han Xie,Jia-Mei Xia,Hui Wang 생화학분자생물학회 2019 Experimental and molecular medicine Vol.51 No.-
The goals of this study were to investigate the role of the Notch1/PDGFRβ/ROCK1 signaling pathway in the pathogenesis of pulmonary fibrosis and to explore the possibility of treating fibrosis by targeting Notch1. Lung tissues from patients with pulmonary fibrosis were examined for the expression of Notch1/PDGFRβ/ROCK1 using RT-qPCR, western blotting, and immunostaining. Cultured mouse lung pericytes were transfected with Notch1-overexpressed vectors or shRNA targeting PDGFRβ/ROCK1 to examine cell behaviors, including proliferation, cell cycle arrest, and differentiation toward myofibroblasts. Finally, a mouse pulmonary fibrosis model was prepared, and a Notch1 inhibitor was administered to observe tissue morphology and pericyte cell behaviors. Human pulmonary fibrotic tissues presented with overexpression of Notch1, PDGFRβ, and ROCK1, in addition to a prominent transition of pericytes into myofibroblasts. In cultured mouse lung pericytes, overexpression of Notch1 led to the accelerated proliferation and differentiation of cells, and it also increased the expression of the PDGFRβ and ROCK1 proteins. The knockdown of PDGFRβ/ROCK1 in pericytes remarkably suppressed pericyte proliferation and differentiation. As further substantiation, the administration of a Notch1 inhibitor in a mouse model of lung fibrosis inhibited the PDGFRβ/ROCK1 pathway, suppressed pericyte proliferation and differentiation, and alleviated the severity of fibrosis. Our results showed that the Notch1 signaling pathway was aberrantly activated in pulmonary fibrosis, and this pathway may facilitate disease progression via mediating pericyte proliferation and differentiation. The inhibition of the Notch1 pathway may provide one promising treatment strategy for pulmonary fibrosis.