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Renmin, China

Xing B.,Wuhan UniversityHubei | Chen H.,Renmin University of China | Wang L.,Renmin University of China | Weng X.,Renmin University of China | And 2 more authors.
Acta Cirurgica Brasileira

PURPOSE: To investigate the protective effects of ozone oxidative preconditioning (OzoneOP) were associated with the modulation of TLR4-NF-κB pathway. METHODS: Thirty six rats were subjected to 45 min of renal ischemia, with or without treatment with OzoneOP (1 mg/kg). Blood samples were collected for the detection of blood urea nitrogen and creatinine levels. Histologic examinations were evaluated and immunohistochemistry was also performed for localization of TLR4 and NF-κB. The expression of TNF-α, IL-1β, IL-6, ICAM-1 and MCP-1 were studied by Real-time PCR. Western blot was performed to detect the expression of TLR4 and NF-κB. RESULTS: The results indicated that blood urea nitrogen and creatinine levels increased significantly in I/R group. Rats treated with OzoneOP showed obviously less renal damage. Immunohistochemistry showed that TLR4 were ameliorated by OzoneOP. Realtime PCR showed that OzoneOP could significantly inhibit the increased mRNA levels of TNF-α, IL-1β, IL-6, ICAM-1 and MCP-1 induced by I/R. Western blot indicated that the expression of TLR4 and NF-κB were upregulated in I/R group, but OzoneOP could inhibit this increase. CONCLUSION: These findings indicated that OzoneOP had potent anti-inflammatory properties by the modulation of the TLR4-NF-κB pathway in renal ischemia/reperfusion injury. © 2015, Sociedade Brasileira para o Desenvolvimento de Pesquisa em Cirurgia. All rights reserved. Source

Zhai B.-G.,Changzhou UniversityJiangsu | Ma Q.-L.,Changzhou UniversityJiangsu | Ma Q.-L.,Nantong University | Xiong R.,Wuhan UniversityHubei | And 2 more authors.
Materials Research Bulletin

Dy3+ doped barium aluminate (BaAl2O4:Dy3+) phosphors were prepared via the sol-gel combustion route at the ignition temperature of 600 °C. The phosphors were characterized with X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, photoluminescence spectroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Regardless of the absence of Eu2+ luminescent centers, broadband blue-green afterglow with its peak at about 490 nm was recorded in the BaAl2O4:Dy3+ phosphors. The decay profile of the blue-green afterglow can be best fitted into a two-component exponential function with the two lifetime decay constants to be 8.81 and 45.25 s, respectively. The observation of blue-green afterglow from BaAl2O4:Dy3+ in the absence of Eu2+ provides unique opportunity in unveiling the afterglow mechanisms of rare-earth doped alkaline-metal aluminates. Possible mechanisms on the blue-green afterglow in BaAl2O4:Dy3+ phosphors are discussed in terms of the Dy3+ ions introduced trap centers as well as luminescent centers in the crystal lattice. © 2015 Elsevier Ltd. Source

Zhu J.F.,Wuhan UniversityHubei
Future Information Engineering and Manufacturing Science - Proceedings of the 2014 International Conference on Future Information Engineering and Manufacturing Science, FIEMS 2014

The MNEs are inevitably confronted with various discrepancies and even conflicts during their production and operation in China because of the profit-pursuing nature of capital. In order to solve these conflicts, ethics games between the MNEs and Chinese government are proposed in this paper. It can be deduced that there are four main factors accounting for the probability of cooperation, (1) the MNEs’ payoff when strategy set 1 (cooperation & honoring commitment) is adopted; (2) the MNEs’ payoff when strategy set 2 (cooperation & dishonoring commitment) is employed; (3) probability that China has a supervising and administrating government; (4) punishment on the MNEs by Chinese government. To be specific, the higher probability of a law-based government, the stronger punishment on illegal behaviors of the MNEs, and thus more payoff is yielded to the MNEs which choose strategy set 1 (cooperation & honoring commitment), but less to those which adopt strategy set 2 (cooperation & dishonoring commitment). Chinese regulatory government can stimulate the MNEs to honor their commitments that they should shoulder their social responsibility in China and manage their behaviors within the framework of business ethics and codes of ethics. Those findings will provide references for decisionmakers, the government and other departments involved. © 2015 Taylor & Francis Group, London. Source

Zhang X.,Chongqing University | Zhang X.,Wuhan UniversityHubei | Cheng Z.,Chongqing University | Li X.,Chongqing University
Infrared Physics and Technology

As one of the key characteristic components that result from sulfur hexafluoride (SF6) decomposition in SF6 gas-insulated equipment, hydrogen sulfide (H2S) can reflect the severity of the internal insulation faults and indicate whether or not such faults involve solid insulation material effectively. The decomposition of SF6 and its reaction with other impurities to form H2S are simulated in this study via Materials Studio. The simulation verifies that H2S is generated only when serious faults occur in the equipment; thus, the online monitoring of the trace H2S is highly necessary. To achieve a high detection accuracy and avoid cross interference, the spectral line R (8) of the H2S ν1 + ν2 + ν3 co-frequency absorption band is taken as the absorption line for the gas detection by online simulation based on the HITRAN on the Web. In addition, this study develops a cantilever-enhanced photoacoustic spectrometry trace gas detection platform and conducts experimental research on the quantitative detection of trace H2S/SF6 and H2S/N2. Experimental results show that the detection sensitivity of the detection platform to trace H2S under the background gas N2 and SF6 is 0.84 and 1.75 μL/L, respectively, and a strong linear relationship exists between the trace H2S concentration and its corresponding PA signal. Moreover, based on both the theoretical simulation and experiment, the influence of temperature and pressure on the detection platform is discussed and analyzed. The results indicate that the change in the PA signal amplitude decreases with an increase in the pressure or temperature of the PA cell, and the detection platform is more sensitive to pressure. © 2016 Elsevier B.V. Source

Huang L.,Nanjing University of Information Science and Technology | Huang L.,National Center for Space Weather | Wang J.,National Center for Space Weather | Jiang Y.,Nanjing University of Information Science and Technology | And 3 more authors.
Advances in Space Research

Ionospheric scintillation variations are studied using GPS measurements at the low latitude station of Shenzhen (22.59°N, 113.97°E), situated under the northern crest of the equatorial anomaly region, from the Chinese Meridian Project. The results are presented for data collected during the current phase of rising solar activity (low to high solar activity) from December 2010 to April 2014. The results show that GPS scintillation events were largely a nighttime phenomenon during the whole observation period. Scintillation events mainly occurred along the inner edge of the northern crest of the equatorial anomaly in China. The occurrence of scintillations in different sectors of the sky was also investigated, and the results revealed that it is more likely for the scintillations to be observed in the west sector of the sky above Shenzhen. During the present period of study, a total number of 512 total electron content (TEC) depletions and 460 lock loss events were observed. In addition, both of these events are likely to increase during periods of high solar activity, especially because the strong scintillations are often simultaneously accompanied by TEC depletions and lock losses by GPS receivers. © 2014 COSPAR. Published by Elsevier Ltd. All rights reserved. Source

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