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THE PERFORMANCE OF MgO/BaCO3 CATALYST FOR METHANE OXIDATIVE COUPLING

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Journal of Energy Chemistry 1993年第2期 81-91页

作者： DA Jian-Wen DING Xue-Jia SHEN Shi-Kong State Key Laboratory of Oxo.Synthesis and Selective Oxidation lanzhou Institute of Chemical Physics,Academia Sinica lanzhou,gansu 730000

A new catalyst system composed of mainly alkaline earth metalcompounds has been reported in the *** catalyst,MgO/BaCO3,has ahigh activity and a high C2selectivity for the title *** resultsindicate that high PcH4benefits C2selectivity and high Po2benefits *** optimizing C2yield can be obtained under properly selected reactionconditions.530h stability test shows that the catalyst is very stable during *** carbonation of the catalyst does not affect its activity.

关键词： MgO THE PERFORMANCE OF MgO/BaCO3 CATALYST FOR METHANE OXIDATIVE COUPLING

Effect of areca on contraction of colonic muscle strips in rats

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World Journal of Gastroenterology 2002年第2期8卷 350-352页

作者： Dong-Ping Xie Lian-Bi Chen,Department of Physiology,Medical College,Shandong University,Jinan 250012,Shandong Province,China Wei Li Song-Yi Qu Tian-Zhen Zheng,Department of Physiology,lanzhou Medical College,lanzhou 730000,gansu Province,China Ying-Li Yang,Northwest Normal University,lanzhou 730070,gansu Province,China Yong-Hui Ding Yu-Ling Wei,Drug Control Institute of gansu Province,lanzhou 730000,gansu Province,China Department of Physiology Medical College Shandong University Jinan 250012 Shandong Province China. xiedping@***

AIM: To investigate the effects of areca on the contractile activity of isolated colonic muscle strips in rats and mechanism involved. METHODS: Each strip (LMPC, longitudinal muscle of proximal colon; CMPC, circular muscle of proximal colon; LMDC, longitudinal muscle of distal colon; CMDC, circular muscle of distal colon.) was suspended in a tissue chamber containing 5 mL Krebs solution (37 degrees C), bubbled continuously with 950 mL.L(-1) O(2) and 50 mL.L(-1) CO(2). The mean contractile amplitude (A), the resting tension (T), and the contractile frequency (F) were simultaneously recorded on recorders. RESULTS: Areca dose dependently increased the mean contractile amplitude, the resting tension of proximal and distal colonic smooth muscle strips in rats (P0.05). CONCLUSION: Areca stimulated the motility of isolated colonic smooth muscle strips in rats. The stimulation of areca might be relevant with M receptor partly.

关键词： Areca Animals Atropine Colon Female Hexamethonium In Vitro Male Muscle Contraction Nicotinic Antagonists Parasympatholytics Plant Extracts Rats Rats, Wistar Research Support, Non-U.S. Gov't

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羊肚菌发酵液对小鼠抗疲劳作用试验研究

卫生研究 1997年第5期26卷 330-332页

作者： Yun Jianmin (Department of Food Engineering,gansu Agricultural University,lanzhou 730070,China) 甘肃农业大学食品工程系

本研究对羊肚菌发酵液的抗疲劳作用进行了动物实验。结果表明，羊肚菌发酵液能明显提高机体糖原储备（肌糖原和肝糖原），使小鼠血红蛋白含量升高，血乳酸含量降低，小鼠运动能力和耐疲劳能力显著加强。

关键词：羊肚菌发酵液抗疲劳作用

Millennial-scale monsoonal climatic change from paleosol sequences on the Chinese western Loess Plateau and Tibetan Plateau: a brief summary and review

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Chinese Science Bulletin 1999年第S1期44卷 38-52页

作者： FANG Xiao-Min LI Ji-Jun Department of Geography, lanzhou University, lanzhou, gansu 730000, PR China

This paper summarizes the work from the INQUA 1997 Project "Response of soilformation to short-warm-episodes of Asian summer monsoon" and its seeded related internationaland domestic grants. It reviews the effects of the millennial monsoonal changes on the loess-paleosols of the Chinese Loess and Tibetan Plateaus. High-resolution proxy records ofpedogenesis and monsoons demonstrate that both Asian winter and summer monsoons wereunstable and synchronously and inversely coupled during the last glaciation. During that timerapid episodic cycles of cold surges and warm enhancements spanned only ca. 1-2 ka in high-frequency domain. Sub-Milankovitch cycles (6-8 ka) of progressive cooling or weakening in low-frequency domain generally resembled the pattern of the North Atlantic climatic change. However,during the last interglacial, Asian winter and summer monsoons seemed to vary independently, theformer being stable and the later unstable. Soil formation seems to occur in surprisingly fastresponse to the summer monsoon warm enhancements, resulting in weakly or moderatelydeveloped paleosol sequences. North Atlantic and polar cold air surges though the westerlies andother paths, and the north-south swing of the westerlies beside the Tibetan Plateau, may be thealternative mechanisms for the rapid monsoonal changes during the last glacial. But in the lastinterglacial, the summer monsoons worked largely independently.

关键词： Monsoon instability loess-paleosol sequence pedogenesis Tibetan Plateau

Characterization of gases and solid residues from closed system pyrolysis of peat and coals at two heating rates

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Characterization of gases and solid residues from closed sys...

8度地震区高层建筑短肢剪力墙结构的判别及设计探讨

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Yi Duan~*,Baoxiang Wu,Jinxian He,Tao Sun Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,382 west donggang road,lanzhou 730000,China

Closed system gold-tube pyrolysis experiments were performed on a peat and two coals(TY:R = 0.51%;SX:R-0.94%) at temperatures ranging from 337 to 600℃and a pressure of 50 MPa with heating rates of 2 and/or 20℃/*** reaction residues were analyzed *** and chemical and isotopic compositions of the generated gases were also *** three samples had similar thermal evolution *** increasing heating temperature,vitrinite reflectances(VR) of the residues increased linearly from 0.72%to 4.50%.This increase was lesser for the sample with a higher hydrocarbon generation potential and at faster heating *** compositions are dominated by CO and CH throughout the experimental *** gas and CH yields gradually increase with pyrolysis temperature for all *** carbon isotopic compositions of CH generated from the peat are lighter than those from the ***δC(CH) values exhibit a generic evolution pattern which the initial CH is isotopically heavy,then becomes lighter at moderate temperatures,and finally becomes heavier *** produced from the samples at low heating rate has higher transformation ratio than that at high heating rate under the same temperature,so tends to be isotopically heavy after pyrolysis temperature of more than 408℃.

关键词： Pyrolysis Coal Peat Gas generation Vitrinite reflectance

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土木工程学报 2011年第9期44卷 65-70页

作者：张举涛甘肃省建筑设计研究院甘肃兰州730030

《高层建筑混凝土结构技术规程(》JGJ 3—2002)对短肢剪力墙较多的剪力墙结构未给出明确的判定方法,在使用中引起了一定的困惑。为此介绍几种文献对高层建筑短肢剪力墙结构的判别方法,各法不尽相同,差异也比较大。讨论短肢剪力墙及短肢... 详细信息

《高层建筑混凝土结构技术规程(》JGJ 3—2002)对短肢剪力墙较多的剪力墙结构未给出明确的判定方法,在使用中引起了一定的困惑。为此介绍几种文献对高层建筑短肢剪力墙结构的判别方法,各法不尽相同,差异也比较大。讨论短肢剪力墙及短肢剪力墙结构的判别问题。取用8度地震区的一个工程实例,设定不同高度、不同底部地震倾覆力矩比共6种模型,进行短肢剪力墙结构和一般剪力墙结构的分析比较,发现当房屋高度分别不高于60m、80m1、00m时,短肢剪力墙承担的底部地震倾覆力矩分别大于40%、30%、20%时,将该结构判定为短肢剪力墙较多的剪力墙结构,基本能与大部分文献吻合,建议高层建筑按不同高度用不同的底部地震倾覆力矩比判别是否属于短肢剪力墙结构,并提出在短肢剪力墙结构设计中应注意的一些问题。

关键词：高层建筑短肢剪力墙短肢剪力墙结构判别

Parametric instabilities in quantum plasmas with electron exchange-correlation effects

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Chinese Physics B 2013年第2期22卷 341-346页

作者：何彩霞薛具奎 Key Laboratory of Atomic & Molecular Physics and Functional Materials of gansu Province College of Physics and Electronics EngineeringNorthwest Normal University

Parametric instabilities induced by the nonlinear interaction between high frequency quantum Langmuir waves and low frequency quantum ion-acoustic waves in quantum plasmas with the electron exchange-correlation effects are *** using the quantum hydrodynamic equations with the electron exchange-correlation correction,we obtain an effective quantum Zaharov model,which is then used to derive the modified dispersion relations and the growth rates of the decay and four-wave *** influences of the electron exchange-correlation effects and the quantum effects on the existence of quantum Langmuir waves and the parametric instabilities are discussed in *** is shown that the electron exchange-correlation effects and quantum effects are strongly *** quantum Langmuir wave can propagate in quantum plasmas only when the electron exchange-correlation effects and the quantum effects satisfy a certain *** electron exchange-correlation effects tend to enhance the parametric instabilities,while quantum effects suppress the instabilities.

关键词： parametric instabilities quantum Langmuir waves electron exchange-correlation

从“制约权力”到“自我约束”──春秋时期政治的重要特点与孔子政治思想的局限

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陕西师范大学学报（哲学社会科学版） 2001年第4期30卷 85-90页

作者：乔健兰州大学历史系甘肃兰州730000

"君主"和"强国"的权力须受到一定程度制约，是春秋时期相对广泛通行的政治规范和观念。作为伟大的文化总结者的孔子，并未深刻认识和全面总结春秋时期这一最具价值的政治现实与政治思想，而是将政治的希望最终全部寄托在统治者的"自我约... 详细信息

"君主"和"强国"的权力须受到一定程度制约，是春秋时期相对广泛通行的政治规范和观念。作为伟大的文化总结者的孔子，并未深刻认识和全面总结春秋时期这一最具价值的政治现实与政治思想，而是将政治的希望最终全部寄托在统治者的"自我约束"上，出现了从"过度批判政治现实"始、以"虚幻的政治理想"终的问题，孔子的政治思想也因之而产生了影响久远的局限。

关键词：政治孔子权力制约自我约束春秋时期政治思想政治权力局限性

A NEW DITERPENE GLYCOSIDE FRON ASTR AGERATOTDES TURCZ

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Chinese Chemical Letters 1993年第1期4卷 39-40页

作者： Dong Liang CHENG, Xiao Ping CAO, Han Xun WEI and Li YANG Department of Chemistry, National Laboratory of Applied Organic Chemistry, lanzhou University, lanzhou, gansu. 730000.

From aerial part of Aster ageratoides, a new natural diterpene glucoside was isolated, Its structure was established by means of spectral and chemical methods as 16β-hydroxy-17-acetoxy-(-)-kauran-19-oic acid-β-D-glu... 详细信息

关键词： CO