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RISS 인기검색어
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- 저자 : Zi-Sheng Xu (검색결과 4 건)
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Xin Liu,Zi-Yu Liu,Yang-Hai Zheng,Yong-De Yan,Wen-Da Xu,Yun Xue,Yue-Lin Wang,Fu-Qiu Ma,Kai Zhu,Yu-Sheng Yang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
The disposal of spent radioactive ion exchange resin generated during the operation of nuclear facilitieshas always been a conundrum. The molten salt oxidation (MSO) for the treatment of mixed resin (MR)shows obvious superiority. In this work, ternary carbonate (Li2CO3-Na2CO3-K2CO3) and MR was usedas the molten salt system and the oxidation target, respectively. The oxidation behavior of MR was analyzedby varying the temperature and oxygen equivalent during the MSO process. By studying the effectof different oxygen equivalents on the oxidation efficiency, the oxygen equivalent of 125% could make theoxidation efficiency of MR reach 99.99% at 800 C. The composition of C, N and S containing exhaust gasproduced through MSO process of MR with temperature were almost consistent with the simulationresults. The exhaust gas was successfully adsorbed by molten carbonate to produce nitrate and sulfurcompounds. The carbonate has good absorption to harmful gases such as SO2, CO, NO, etc. The contentof SO2 from the highest 0.32% to 0, and 71.23% of sulfur in MR was trapped by molten carbonate asthe form of sulfate. This work has important implications for reducing the potential harm of radioactivewaste resin to the environment.
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Cao Mei-He,Nie Zi-Ling,Ai Sheng,Xu Jie 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
Phase-shifted full-bridge DC/DC converter is widely used in the medium and high power DC/DC conversion, and its efciency is an important index to evaluate the performance of the converter. Phase-shifted full-bridge circuit can easily realize the zero voltage switching (ZVS) of the power devices, but there are also problems such as duty-cycle loss and lagging bridge arms that make it difcult to achieve a wide range of ZVS. The application of active auxiliary network can efectively solve the above problems, but it introduces additional loss. This paper analyzes the phase-shifted full-bridge DC/DC converter with active auxiliary network, the duty cycle-loss suppression and the additional circuit loss, optimizes the circuit parameters to reduce the loss and improve the overall efciency of the converter, verifes the theoretical analysis through experiments. Finally, the efciency advantages of the study for high current output applications are clarifed.
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Grace G.L. Yue,Sau-Wan Cheng,Hua Yu,Zi-Sheng Xu,Julia K.M. Lee,Po-Ming Hon,Mavis Y.H. Lee,Edward J. Kennelly,Gary Deng,Simon K. Yeung,Barrie R. Cassileth,Kwok-Pui Fung,Ping-Chung Leung,Clara B.S. Lau 한국식품영양과학회 2012 Journal of medicinal food Vol.15 No.3
The rhizome of Curcuma longa (turmeric) is often used in Asia as a spice and as a medicine. Its most wellstudied component, curcumin, has been shown to exhibit poor bioavailability in animal studies and clinical trials. We hypothesized that the presence of lipophilic components (e.g., turmerones) in turmeric extract would affect the absorption of curcumin. The effects of turmerones on curcumin transport were evaluated in human intestinal epithelial Caco-2 cells. The roles of turmerones on P-glycoprotein (P-gp) activities and mRNA expression were also evaluated. Results showed that in the presence of a- and aromatic turmerones, the amount of curcumin transported into the Caco-2 cells in 2 hours was significantly increased. a-Turmerone and verapamil (a P-gp inhibitor) significantly inhibited the efflux of rhodamine-123 and digoxin (i.e.,inhibited the activity of P-gp). It is interesting that aromatic turmerone significantly increased the rhodamine-123 efflux and Pgp (MDR1 gene) mRNA expression levels. The effects of a- and aromatic turmerones on curcumin transport as well as P-gp activities were shown here for the first time. The presence of turmerones did affect the absorption of curcumin in vitro. These findings suggest the potential use of turmeric extract (including curcumin and turmerones), rather than curcumin alone, for treating diseases.
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Pu-erh Tea Powder Preventive Effects on Cisplatin-Induced Liver Oxidative Damage in Wistar Rats
Zheng, Xiao-Nan,Wang, Xiao-Wen,Li, Li-Ya,Xu, Zi-Wei,Huang, Hsin-Yi,Zhao, Jin-Sheng,Zhang, Duo,Yin, Xu,Sheng, Jun,Tang, Jin-Tian Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Background: Chemotherapy is one of the major means for control of malignancies, with cisplatin (CDDP) as one of the main agents, widely used for the treatment of various malignant solid tumors. However, prevention of hepatotoxicity from cisplatin is one of the urgent issues in cancer chemotherapy. In this study, we aimed to investigate the effects of pu-erh tea on hepatotoxicity through body weight and tissue antioxidant parameters like, liver coefficient, serum alanine aminotransferase (ALT), serum aspartate aminotransferase (AST), superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), malondialdehyde(MDA) and glutathione (GSH) levels, and light microscopic evaluation by histological findings. Materials and Methods: The rats were randomly divided into five groups: Control (n=10), cisplatin (3 mg/kg p.i., n=10), cisplatin+pu-erh (0.32 g/kg/day i.g., n=10), cisplatin+pu-erh (0.8 g/kg/day i.g., n=10) and cisplatin+pu-erh (1.6 g/kg/day i.g., n=10). Pu-erh tea powder was administrated for 31 consecutive days. The rats were sacrificed at the end on the second day after a single dose of cisplatin treatment for measuring indices. Results: Pu-erh tea powder exhibited a protective effect by decreasing MDA and GSH and increasing the SOD and GSH-PX levels and GSH-PX/MDA ratio in camparison with the control group. Besides, pu-erh tea was also able to alleviate the pathological damage to some extent. Conclusion: Pu-erh tea powder is protective against cisplatin-induced liver oxidative damages, especially at the medium dosage (0.8 g/kg/d).
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