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Olympic Education and Cross-Cultural Communication

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中国体育科技 2009年第1期45卷 18-20页

作者： ren hai Beijing Sport University Beijing China

In recent years,Olympic education has received increasingly greater *** is not just Olympic host cities that have established specialized Olympic education programmes across the board,but also non-host cities are developing Olympic education activities to different *** education has also become an important project in the Olympic preparatory work,and has been an important project in the preparations for the Beijing *** to understand Olympic education? There are many different ways of looking at *** essay attempts to take the unique characteristics of Olympic education as a starting point to explore the important role played by issues of cross-cultural communication in Olympic education.

关键词：奥林匹克跨文化交流沟通方法体育运动体育精神

National botanical gardens at the forefront of global plant conservation

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The Innovation 2023年第5期4卷 1-2页

作者： hai ren Alexandre Antonelli South China Botanical Garden of the Chinese Academy of Sciences Guangzhou 510650China South China National Botanical Garden Guangzhou 510650China Royal Botanic Gardens KewRichmondLondonTW93AE SurreyUK Gothenburg Global Biodiversity Center Department of Biological and Environmental SciencesUniversity of GothenburgBox 46140530 GoteborgSweden|

Global changes in land use driven by demands on food,energy,and other resources in response to a rapidly increasing human population have collectively led to escalating environmental challenges,including biodiversity loss,global warming,environmental pollution,and ecosystem *** present,biodiversity is seriously threatened at global,regional,and local scales,which,in turn,threatens our own *** is a global asset of immense material and non-material value,providing us with food,medicine,building materials,fiber,and the ecological environment required for our well-being and health.

关键词： collective pollution seriously

Natural recovery of different areas of a deserted quarry in South China

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Journal of Environmental Sciences 2008年第4期20卷 476-481页

作者： DUAN Wenjun ren hai FU Shenglei WANG Jun YANG Long ZHANG Jinping Heshan National Field Research Station of Forest Ecosystem South China Botanical Garden the Chinese Academy of Sciences Guangzhou 510650 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

A quarry is a surface mining operated place, which produces enormous quantifies of gravel, limestone, and other materials for industrial and construction applications. Restoration and revegetation of deserted quarries are becoming increasingly important. Three areas of a typical quarry in South China： terrace for crushed materials （terrace）, spoiled mound, and remaining side slope, were investigated, to compare the existing plant species and to study the relationship between environmental factors and revegetation. The plant species composition of these three areas was found to differ significantly after eight years of natural recovery. The typical plant communities found over them were composed of gramineous herbs, ferns, and shrubs. Soil organic matter, soil moisture, and soil bulk density were considered to be the major determining factors for vegetation succession. There existed abiotic and biotic thresholds during quarrying restoration. Suggestions had been presented that could have accelerated the process of natural recovery in quarries.

关键词： natural recovery quarry vegetation environment-vegetation relationships

Microstructures and mechanical properties of AZ31-0.1Ca magnesium alloy produced by soft-contact electromagnetic casting and hot extrusion

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Acta Metallurgica Sinica(English Letters) 2010年第2期23卷 90-98页

作者： Zheng ren Xingguo ZHANG hai HAO Li SUI Tao ZHANG Yutao MA School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China

An AZ31-0.1Ca magnesium alloy produced by Soft-contact electromagnetic continuous casting （SEMC） was investigated. The fine homogeneous structure and the precipitated phases were obtained by SEMC. The effects of microalloying of Ca and middle frequency electromagnetic field on AZ31-0.1Ca magnesium alloy were discussed. And the as-cast billets were extruded with different extrusion ratios subsequently. The alloy showed an ultrafine grain size of 2-5 #m due to dynamic recrytallization （DRX） in the course of hot extrusion. The comprehensive properties of the as-extruded alloy are the best at the extrusion ratio of 25, and the hardness, UTS and elongation are 73.9 HB, 356.8 MPa and 16.570, respectively.

关键词： SEMC Hot extrusion AZ31-0.1Ca Microstructure Mechanical properties

Effects of neutral salt and alkali on ion distributions in the roots,shoots,and leaves of two alfalfa cultivars with differing degrees of salt tolerance

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Journal of Integrative Agriculture 2017年第8期16卷 1800-1807页

作者： WANG Xiao-shan ren hai-long WEI Zen-wu WANG Yun-wen ren Wei-bo Department of Grassland Science College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010000P.R.China Department of Grassland Science College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193P.R.China

The effects of neutral salt and alkali on the ion distribution were investigated in two alfalfa （Medicago sativa L.） cultivars, including Zhongmu 1, a high salt-tolerant cultivar, and Algonquin, a low salt-tolerant cultivar. The alkali stress expressed more serious growth inhibition than the neutral salt stress at the same Na＋ concentration. Compared with Algonquin, Zhongmu 1 did not exhibit a higher alkali tolerance under the Na2CO3-NaHCO3 treatment with the low Na＋ concentration （50 mmol L-l）. The alkali increased the accumulation of Na＋, Ca2＋, and Mg2＋ in the root and changed the Ca2＋ and Mg2＋ balance in the entire alfalfa plant. The salt and alkali stresses decreased the K＋ and Fe3＋ contents of the roots and leaves, the root Mn2＋ content, and the shoot Zn2＋ content, but they increased the Fe3＋ accumulation of the shoots, the shoot and leaf Cu2＋ contents, and the leaf Zn2＋ content in both alfalfa cultivars. Based on the results obtained under the conditions of this experiment, we found that the salt and alkali stresses reduced the plant growth in both alfalfa cultivars, while the alkali caused a stronger stress than the neutral salt in alfalfa. Thus, we conclude that under hydroponic conditions, the deleterious effects of the alkali on plants are due to the distribution change of some trophic ion balance in the roots, shoots, and leaves of the plants by causing of Na＋, CO3^2-, and/or HCO3- stresses.

关键词： alfalfa ion distribution neutral salts alkali stress

Cloning of catalase gene and antioxidant genes in Scophthalmus maximus response to metalloprotease of Vibrio anguillarum stress

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Journal of Oceanology and Limnology 2022年第1期40卷 322-335页

作者： hai ren Jian LI Ping LIU Xianyun ren Tao SONG Guisheng GAO Duwen LI Shuaiting LIU Hebei Key Laboratory of Preventive Veterinary Medicine Hebei Normal University of Science and TechnologyQinhuangdao 066004China Key Laboratory of Sustainable Development of Marine Fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China

Metalloproteases represent a class of extracellular proteases found in Vibrio anguillarum that can generate toxic and pathogenic eff ects in turbot(Scophthalmus maximus).The toxicological eff ect partly results from oxidative damage due to the production of excessive reactive oxygen species(ROS).Catalase(CAT),superoxide dismutase(SOD),and glutathione peroxidase(GPx)are major antioxidant enzymes induced by various oxidative stresses and can scavenge peroxides generated in *** evaluate the eff ects of metalloprotease-induced ROS on the antioxidation defense mechanism of *** head kidney cells,the cDNA of CAT gene(designated as SmCAT)was cloned and *** comprises a 1584-bp coding sequence that encodes a protein containing 527 amino acids with a poly(A)*** analysis revealed an active site signature sequence,a heme-ligand signature sequence,and three catalytic amino acid *** deduced SmCAT amino acid sequence shares a sequence similarity of 66.1%-92.4%with those of other *** analysis revealed that SmCAT is classifi ed with CAT of other fi *** real-time PCR analysis showed that SmCAT was extensively expressed in all tested tissues,especially in *** expression of SmCAT,SmMnSOD,and SmGPx were inhibited signifi cantly in head kidney cells treated with metalloprotease from 12 to 24 *** 6 to 24 h metalloprotease-treated groups compared to that of the untreated group,it was found that the production of ROS was markedly increased,and the mitochondrial membrane potential was decreased *** 33342 staining revealed the presence of apoptotic bodies when the cells were incubated with 8.0 or 40.0μg/mL metalloprotease for 12 and 24 ***,the toxic eff ects of metalloprotease are associated with the down-regulation of antioxidant enzyme expression and increased ROS levels,which trigger the activation of apoptosis in the head kidney cells of *** fi ndings provide a better under

关键词： gene cloning expression reactive oxygen species metalloprotease head kidney cells

MOF-derived Porous Carbon Nanofiber Assembly as High Efficiency ORR Electrocatalysts for Zinc-air Batteries

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Chinese Journal of Polymer Science 2023年第12期41卷 1889-1901,I0008页

作者： Jin-Liang Ma Long-Long Liu ren-hai Zhao Ding Yuan Xin Ning Industrial Research Institute of Nonwovens&Technical Textiles Shandong Center for Engineered NonwovensCollege of Textiles&ClothingQingdao UniversityQingdao 266071China

Reasonable construction of high activity and low cost non-noble metal oxygen reduction reaction(ORR)catalyst is of great importance for the wide application of zinc-air batteries(ZABs).Using bimetallic MOF as a precursor combined with electrospinning,high-temperature carbonization and electrodeposition,we successfully developed a porous carbon nanofiber(Co@Fe-CNFs-1000)with bimetallic active center as an efficient catalyst for *** successful construction of this special core-shell structure directly explores the synergy between different active *** results showed that the synthesized Co@Fe-CNFs-1000 catalyst exhibited ORR performance comparable to that of Pt/C in 0.1 mol/L KOH electrolyte,high half-wave potential(E_(1/2)=0.81 V)and limiting current density(J_(L)=5.4 mA·cm^(-2)).In addition,homemade liquid ZABs with Co@Fe-CNFs-1000 as the air cathode showed excellent power density(155.8 mW·cm^(-2)),specific capacity(780.6 mAh·g_(Zn)^(-1))and long-term stability(over 100 h at 2 mA·cm^(-2)),surpassing even Pt/C-based *** addition,the flexible solid-state ZABs assembled based on Co@Fe-CNFs-1000 demonstrates excellent flexibility and *** work provides a new idea for constructing ORR catalysts with high activity centers.

关键词： Electrospinning Porous structure ORR Bimetallic MOFs Zinc-air battery

Ribavirin and IFN-α combination therapy induces CD4+ T-cell proliferation and Th1 cytokine secretion in patients with chronic hepatitis B

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World Journal of Gastroenterology 2007年第41期13卷 5440-5445页

作者： Fen-Yu ren hai Jin Xi-Xu Piao Feng-Shun Piao Department of Gastroenterology and Hepatology Yanbian University Hospital Yanji 133000 Jilin Province China

AIM: To investigate the anti-viral mechanism of combination therapy of interferon (IFN)-α and ribavirin in patients with chronic hepatitis B. METHODS: Twenty patients were assigned to receive either IFN-α plus ribavirin (group A,n = 14) or no treatment as a control (group B,n = 6). Patients were analyzed for T-cell proliferative responses specific for hepatitis B virus (HBV)-antigen and cytokine production by peripheral blood mononuclear cells (PBMCs). RESULTS: Combination therapy induced HBV-antigen specific CD4+ T-cell proliferative responses in four patients (28.6%). Production of high levels of HBV-specific IFN-γ,tumor necrosis factor (TNF)-α,interleukin (IL)-12 by PBMCs was found in five patients (35.7%),who showed significantly lower HBV DNA levels in serum at 12 mo after treatment ended (P = 0.038) and at 24 mo of follow-up (P = 0.004) than those without high levels of cytokine production. CONCLUSION: HBV-antigen specific CD4+ T cells may directly control HBV replication and secretion of anti-viral T helper 1 (Th1) cytokines by PBMCs during combination therapy of chronic hepatitis B with ribavirin and IFN-α.

关键词： Hepatitis B Interferon-alpha Ribavirin CD4+ T cells Th1

Dynamic mechanical characteristics of deep Jinping marble in complex stress environments

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 630-644页

作者： Chendi Lou Heping Xie Ru Zhang hai ren Hao Luo Kun Xiao Yuan Peng Qiang Tan Li ren Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610207China College of Water Resource&Hydropower Sichuan UniversityChengdu610065China MOE Key Laboratory of Deep Earth Science&Engineering Sichuan UniversityChengdu610065China Yalong River Hydropower Development Company Ltd.Chengdu610051China (Chongqing)International Engineering Technology Company Ltd.Chongqing401121China

To reveal the dynamic mechanical characteristics of deep rocks,a series of impact tests under triaxial static stress states corresponding to depths of 300-2400 m were *** results showed that both the strain rates and the stress environments in depth significantly affect the mechanical characteristics of *** sensitivity of strain rate to the dynamic strength and deformation modulus shows a negative correlation with depth,indicating that producing penetrative cracks in deep environments is more difficult when damage *** dynamic strength shows a tendency to decrease and then increase slightly,but decreases sharply *** demonstrates a similar trend as that of strength,whereas reflectivity indicates the opposite ***,two critical depths with high dynamically induced hazard possibilities based on the China Jinping Underground Laboratory(CJPL)were proposed for deep *** first critical depth is 600-900 m,beyond which the sensitivity of rock dynamic characteristics to the strain rate and restraint of circumferential stress decrease,causing instability of surrounding rocks under axial stress *** second one lies at 1500-1800 m,where the wave impedance and dynamic strength of deep surrounding rocks drop sharply,and the dissipation energy presents a negative *** suggests that the dynamic instability of deep surrounding rocks can be divided into dynamic load dominant and dynamic load induced types,depending on the second critical depth.

关键词： Rock mechanics Split-Hopkinson pressure bar Coupled static‒dynamic loading Different depths Holmquist-Johnson-Cook(HJC)model