|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effect of the pore size of Co/SBA-15 isomorphically substituted with zirconium on its catalytic performance in Fischer-Tropsch synthesis显示文摘Cobalt catalysts supported on a series of mesoporous SBA-15 materials isomorphically substituted with zirconium (Zr/Si atomic ratio=1/20) with different pore sizes (5.7 nm,7.8 nm,11.6 nm,17.6 nm) have been synthesized.The catalysts were characterized by transmission electron microscopy,29 Si solid state magic angle spinning (MAS)NMR,N2 adsorption-desorption measurements,X-ray powder diffraction,X-ray photoelectron spectroscopy,H2-temperature programmed reduction,H2-temperature programmed desorption and O2 titrations.The results indicated that larger pore size led to weaker interactions between cobalt and the supports which lowered the temperature of both reduction steps (Co3O4 → CoO and CoO→ Co0).The catalytic performances of the catalysts in Fischer-Tropsch synthesis (FTS) were tested in a fixed bed reactor.It was found that the FTS catalytic activity and product selectivity depended strongly on the pore size of the catalysts.The catalyst with a pore size of 7.8 nm showed the best FTS activity,and the catalyst with a pore size of 17.6 nm showed the highest selectivity to C12-C20 and C20+ hydrocarbons. | TAO CongLiang 1,LI JinLin 1 & LIEW Kong Yong 1,2 1 Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education South-central University for Nationalities,Wuhan 430074,China 2 Faculty of Industrial Science and Technology,University Malaysia Pahang,Gambang 26300,Kuantan,Pahang,Malaysia | 2010 | Science China Chemistry2010，53，12： | 5 |
| 2 | Pregnane Glycosides from Stems of Marsdenia tenacissima显示文摘Objective To study the chemical constituents from the stems of Marsdenia tenacissima.Methods The chemical constituents were isolated by various column chromatography and their structures were identified by spectral and chemical analysis.Results Two pregnane glycosides were isolated from the stems of M.tenacissima and identified as 3-O-β-D-glucopyranosyl-(1→4)-6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl-11α-O- tigloyltenacigenin B,named as tenacigenoside I(1)and 3-O-β-D-glucopyranosyl-(1→4)-6-deoxy-3-O-methyl-β-D- allopyranosyl-(1→4)-β-D-oleandropyranosyl-11α,12β-di-O-acetyltenacigenin B,named as tenacigenoside K(2).Conclusion Compound 1 is a new compound,1H-NMR and 13C-NMR data of compound 2 are reported for the first time. | YANG Mei,WANG Wen-lan,WU Hao,WANG Xiao-ling Ethnic Pharmaceutical Institute,Southwest University for Nationalities,Chengdu 610041,China | 2011 | Chinese Herbal Medicines2011，3，1： | 5 |
| 3 | Security Situation in Afghanistan显示文摘In the first half of 2006, the Taliban armed forces intensified their terrorist attacks in Afghanistan, thus drawing attention of the international community. The worse situation there will inevitably produce negative impacts on the security in the west regions of China. Based on a thorough analysis of the situation, the author concluded that the low-intensity conflicts there would continue in some time to come. | Dr. Fang Jinying is an Associate Professor of the Institutes of Security and Strategic Studies, China Institutes of Contemporary International Relations (CICIR). Her major academic interests are in the worldwide Islamic extremism and South Asian security. She has written a number of articles. She is also the author of The Emergency and Development of “Ethnic Chinese Issue” in Southeast Asia (2001), and coauthor of Focus on Global Ethnic Issues (2001) and Focus on World Religious Issues (2003). | 2006 | Contemporary International Relations2006，16，6： | 2 |
| 4 | The effect of pregnancy on paternal skin allograft survival显示文摘Elucidation of maternal-fetal tolerance mechanisms clarifies the role of regulatory T cells (Treg) in transplant tolerance. This study aim to investigate the effect of pregnancy on paternal skin allograft survival. Flow cytometry techniques, mixed lymphocytes reaction (MLR), PCR, real-time PCR and skin transplantation were key methods. Treg increased significantly from 4.2% before pregnancy to peak at 6.8% day 8 after pregnancy. Both heme oxygenase-1 (HO-1) and indoleamine 2,3-dioxygenase (IDO) mRNA express high in placenta while low in spleen (P<0.05). Although Treg increased during pregnancy, and splenocytes from the pregnant mice showed lower MLR response toward the paternal stimulator, single time pregnancy showed no significant protective effect on paternal skin allograft survival in the tested condition. | SHOU ZhangFei1,2,3, XU YiFang2, XIAO HuaYing2, ZHOU Qin2, CAI JieRu2, YANG Yi1, JIANG Hong2, ZHANG WenJie3 & CHEN JiangHua1,2 1 Kidney Disease Center, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China 2 Key Laboratory of Multi-organ Combined Transplantation, Ministry of Health, Hangzhou 310003, China 3 Key Laboratory of Xinjiang Endemic and Ethnic Diseases, Ministry of Education, School of Medicine, Shihezi University 832003, China | 2009 | Science China(Life Sciences)2009，52，11： | 2 |
| 5 | the genetics of antiepileptic drug-induced skin reactions显示文摘 | Miller JW:Of race ethnicity and rash | 2008 | Epilepsy Curr2008，8，5： | 1 |
| 6 | 显示文摘 | George Psathas Ethnicity social clas and adolescent independence from parenl control | 1957 | 1957，，： | 1 |
| 7 | 英语教学中师生对自主学习态度的调查与分析(英文)显示文摘我国大学英语的教学目的是培养学生用英语交流信息的能力,并掌握良好的语言学习方法,成为独立的语言学习者和使用者。作者就英语教师和非英语专业大学生在英语教学中对以教师为中心还是以学生为中心的态度进行了调查分析。调查从教材、教学目的、教学模式、师生关系和对培养以学习者为中心的必要性几个方面入手,得到了有代表性的,有效的反馈结果。根据师生们的态度情况,作者对教师在英语教学中今昔的不同作用进行了对比分析,指出了在英语教学中培养学习者独立、自主学习的重要性和必要性。 | Qi Shujun Shandong Agricultural UniversityPang Ping Central University for Ethnic Communities | 2002 | Chinese Journal of Applied Linguistics2002，25，2： | 1 |
| 8 | Afghanistan Reconstruction显示文摘The post-war reconstruction in Afghanistan is going on smoothly within the framework of the Bonn Agreement, and the country has come back to normal as far as the appearance goes. However, with foreign involvement, economic recovery has lagged behind the political reconstruction. Worse still, the Afghan government is now facing a series of challenges including worse situation, revival of warlords, drug economy, poverty and political corruption, etc. Besides, the negative impacts of over-dependence on the United States are now gradually revealing themselves, and uncertainties lie ahead. | Fu Xiaoqiang is an Associate Professor of the Institutes of Asian and African Studies, and Deputy Director of the Center for Crisis Management, CICIR. He has research interests in South Asian and regional security. He has published a large number of academic articles such as “The Emergence of India and South Asian Security,” “Development of Pakistan’s Policy toward China and Its Trend,” “An Analysis of the Historical Roots of Kashimir Issue,” etc. He is also the author of Ethnic and Religious Issues in China’s Neighboring Countries (2002). | 2006 | Contemporary International Relations2006，16，6： | 1 |
| 9 | The Collaborative Study on the Genetics of Asthma (CSGA) 显示文摘 | A genome-wide search for asthma susceptibility loci in ethnically diverse populations | 1997 | Nat Genetics1997，15，3： | 1 |
| 10 | Influence of TiO_2 Nano Particles on the Resistance to Corrosion and Mechanism of Cr_2O_3显示文摘Cr2O3-based ceramic composite coatings with a NiCr intermediate layer adding nano TiO2 particles were synthesized by Air plasma spraying(APS)followed further seal treatment.The coating samples were characterized by X-ray diffractions(XRD),scanning electron microscope(SEM).The corrosion behavior of coating was measured by weight loss in three solutions(HCl,NaOH,and NaCl).The relationships between the microstructure,corrosion behavior,and the content of TiO2 in coatings were investigated.When the content of TiO2 was relative high,the coating was composed of(Cr0.88Ti0.12)2O3 and Cr2O3 phase.Before sealing,the coating weight decreased all long in three kinds of solutions.However,after sealing treatment the coating weight decreased early but increased later,changed periodically as so.Polarization curve and electrochemical impedance spectroscopy(EIS) were performed to study the corrosion mechanism.The results showed that like organic coating,the corrosion of ceramic coating included three stages,in which the weight of samples decreased or increased corresponding to different physical and physical or chemical processes.The salt spray test showed the Cr2O3-based ceramic composite coating had an excellent decay resistance in marine environment. | Cheng Xudong1,Peng Sheng1,Zhou Jiliang2,Zhu Zhenqi1 1 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China 2 Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission&Ministry of Education,Hubei Province,South-central University for Nationalities,Wuhan 430074,China | 2012 | 稀有金属材料与工程2012，41，S1： | 1 |
| 11 | 决战决胜——扶贫夫妻档显示文摘In March 2020 General Secretary Xi Jinping stressed that“people are the key to com pleting poverty elim in ation.”In this battle,married couples stationed in villages are more like fellow s in war.Couples went to where poverty elimination was most needed and left beautiful stories in villages across China. | China's Ethnic Groups editorial office | 2020 | China's Ethnic Groups2020，18，4： | 0 |
| 12 | China's Regional Autonomy显示文摘China is a vast country with a long history and splendid culture. One reason for this is that the Chinese nation consists of many ethnic groups. They have lived, procreated, struggled and made creative achievements on this land for several thousand years. China is a big family consisting of 56 ethnic groups. Whilethe Hart ethnic group has the largest population, the population of the other 55 ethnic groups is relatively small, so they are customarily referred to as “ethnic minorities.” | Wu Shimin, Deputy Minister of the State Ethnic Affairs Commission | 2005 | China's Foreign Trade2005，，4： | 0 |
| 13 | Ethnic and Religious Conflicts in Asia and the Pacific显示文摘Backgrounds and Features According to recent annual reports by both Stockholm International Peace Research Institute (SIPRI) and Londonbased International Institute for Strategic Studies (IISS), twenty to thirty armed conflicts and local wars in various forms take place every year in the world since the 1990s, and | He Xiquan~* Research Professor and Director at Center for Ethnic and Religious Studies, China Institute of Contemporary International Relations. | 2002 | Contemporary International Relations2002，12，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员