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Song, Bo,Choi, Ji Il,Zhu, Yuntong,Geng, Zhishuai,Zhang, Le,Lin, Ziyin,Tuan, Chia-chi,Moon, Kyoung-sik,Wong, Ching-ping American Chemical Society 2016 Chemistry of materials Vol.28 No.24
<P>Three phenylenediamine (PD) monomers, o-phenylenediamine (OPD), m-phenylenediamine (MPD), and p-phenylenediamine (PPD), were used to prepare the functionalized graphene (PD/rGO) networks. The results obtained from a series of chemical, thermal, and rheological analyses elucidated the mechanism of the covalent bonding and the existence of cross-linked graphene networks. The measured XRD patterns and molecular dynamic calculations discovered that those PPD and MPD molecules could enlarge graphene interlayer spacing to 1.41 and 1.30 nm, respectively, while OPD molecules were disorderly bonded or nonbonded to the basal planes of graphene layers, resulting in small and variable inter layer distances. The loadings of PD monomers were optimized to achieve superior supercapacitor performance. Electrochemical study showed that PPD/rGO exhibited the largest specific capacitance of 422 F/g with excellent cycling stability and low charge transfer resistance. The large variations in the capacitance values among PD/rGO networks with different PD monomers were explained by the difference in the graphene nanostructures, reversible redox transitions, and charge transfer characteristics. Particularly, density function theory calculations were adopted to compare electronic properties of the PD/rGO composites, including formation energy, electron density distribution, HOMO energy levels, and electron density of states near the Fermi level.</P>
Wang, Wenbing,Song, Zhixiu,Ji, Ping,Wu, Jun,Zhang, Zhifang,He, Jialu,Wu, Xiangfu Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.9 No.2
Superoxide dismutase (SOD) is an important enzyme which catalyzes superoxide radicals to hydrogen peroxide. A Cu, Zn sod-like gene was found in Bombyx mori nuclear polyhedrosis virus encoding 151 amino acids. To demonstrate its function, a recombinant virus named dsBmNPV with deleted sod gene was constructed. It was discovered that the sod gene was not essential for viral replication. Studies on growth of budded virus in BmN cells and superoxide dismutase and catalase activities in vivo after dsBmNPV infection showed that the titer of dsBmNPV decreased obviously comparing to wild type BmNPV, the sod gene was effective on genomic DNA replication of baculovirus, the peak of SOD activity of silkworm infected with wt-BmNPV appeared between 36 and 48 hrs post infection, and with dsBmNPV, it did not appear. And the changes of CAT activity after infection were similar to SOD activity.
Shun Xu,Xin-ping Long,Bin Ji,Gui-bin Li,Tao Song 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12
The cavitating flow field in waterjet pumps is complex, especially tip leakage cavitation (TLC), which has been a puzzle to researchers for decades. In this study, high-speed video (HSV) of the instantaneous inner structures of tip cavitation flow is used to show the evolution of TLC. Numerical simulation is conducted with the scale adaptive simulation (SAS) turbulence model and Zwart-Gerber-Belamri (ZGB) cavitation model to understand the cavitation-vortex interaction in the blade tip region. The predicted cavitation performance curve exhibits reasonable agreement with the experimental results, and the time-dependent vapor iso-surfaces (α v = 0.1) are consistent with HSV at different times in a typical cycle. Numerical simulation results show that cavitation can enhance the turbulent kinetic energy in the unstable vortex cavitation region and downstream tip leakage vortex region along the blade. Different vortex identification methods, including vorticity, Q criterion, λ ci , λ 2 criterion, Ω, and Liutex/Rortex, are investigated. Analysis and comparison of the iso-surfaces of the different vortex identification methods indicate that the Ω and Liutex iso-surfaces can effectively predict the tip leakage vortex core and vortex pair in the unstable vortex cavitation region. Analysis of the fifth clip contours shows that no obvious difference exists between Q and λ 2 criteria in terms of predicting the vortex core. All vortex identification methods can accurately predict the tip separation vortex in the blade tip region, but only the Ω and Liutex iso-surfaces can predict weak vortices in the cavitation region. The influence of the small parameter ε of the Ω method on tip vortex identification is also discussed.
A Global Online Dispute Resolution System: Is China Ready to Join?
( Qi Sheng He ),( Ji Ping Song ) 고려대학교 법학연구원 2011 The Asian Business Lawyer Vol.7 No.-
In recent years, Online Dispute Resolution (ODR) is in a period of active development and change. United Nations Commission on International Trade Law (UNCITRAL) and other international organizations are actively promoting the establishment of a global ODR system. Facing small value, large volume claims, traditional dispute resolution system in China also can not resolve effectively these disputes arising out of electronic commerce. With an increasing demand of ODR and a favorable legal circumstance for it, ODR practice in China has developed rapidly during the past several years. It can be mainly represented by three categories: Domain Name Dispute Resolution Center of China International Economic and Trade Arbitration Commission (CIETAC), China Online Dispute Resolution Center and Alipay Internal Complaint Mechanism. As for the prospects of China working with UNCITRAL on a Global ODR System, on the one hand, China`s participation in UNCITRAL work on a global ODR system can facilitate its ODR development; on the other hand, China can play an active role in establishing a global ODR system.
Lei Lyu,Ya Xiong Yao,Er Peng Liu,Yan Ping Zhang,Hui Jie Hu,Feng Ping Ji,Qing Song Pu,Xing Huan Yang,Qing Wei Wang,Yan Wang,Jian Guo Wen 대한배뇨장애요실금학회 2022 International Neurourology Journal Vol.26 No.1
Purpose: To identify more accurate predictors of upper urinary tract dilatation (UUTD) in neurogenic bladder (NB) children, we studied the relationship among urodynamic parameters at different bladder filling stages, detrusor leak point pressure (DLPP) and UUTD. Methods: A total of 158 children (3–16 years) with NB were included and then divided into 2 groups according to whether their NB diagnosis was complicated with UUTD: the UUTD group (39 patients) and those without UUTD group (control group, 119 patients). The bladder filling phase was divided into 3 equal parts: the early, middle, and end filling stages. The bladder compliance (BC) and detrusor pressure (△Pdet) at each phase and DLPP at the end filling stage were recorded. Results: A BC<8 mL/cm H2O both in the middle and end stages is more specific than a BC<9 mL/cm H2O in the end stage (72%, 73%, vs. 66%), and △Pdet >8 cm H2O in the early stage, 20 cm H2O in the middle stage and 25 cm H2O in the end stage are more sensitive than △Pdet >40 cm H2O in the end stage (82%, 85%, 85%, vs. 49%). A DLPP cutoff value of 20 cm H2O showed higher sensitivity for predicting UUTD than 40 cm H2O. Conclusions: Low BC and a high △Pdet in the middle and end filling stages are more accurate factors than classic indicators for predicting UUTD. In addition, a DLPP value of >20 cm H2O in the end bladder filling stage shows high sensitivity.
Xuechen Rao,Lanxiang Liu,Haiyang Wang,Ying Yu,Wenxia Li,Tingjia Chai,Wei Zhou,Ping Ji,Jin-Lin Song,Hong Wei,Peng Xie 한국뇌신경과학회 2021 Experimental Neurobiology Vol.30 No.1
An increasing number of studies have recently indicated the important effects of gut microbes on various functions of the central nervous system. However, the underlying mechanisms by which gut microbiota regulate brain functions and behavioral phenotypes remain largely unknown. We therefore used isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomic analysis to obtain proteomic profiles of the hippocampus in germ-free (GF), colonized GF, and specific pathogen-free (SPF) mice. We then integrated the resulting proteomic data with previously reported mRNA microarray data, to further explore the effects of gut microbes on host brain functions. We identified that 61 proteins were upregulated and 242 proteins were downregulated in GF mice compared with SPF mice. Of these, 124 proteins were significantly restored following gut microbiota colonization. Bioinformatic analysis of these significant proteins indicated that the glucocorticoid receptor signaling pathway and inflammation-related pathways were the most enriched disrupted pathways. This study provides new insights into the pathological mechanisms of gut microbiota-regulated diseases.