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2012年环境污染与大众健康学术会议

作者： Wang Jianbing 1* , Xu Cuihua 1 , Zhao Li 1 , Han Wenya 2 , Zhu Wanpeng 3 , Li Yanan 1 1 School of Chemical and Environmental Engineering, beijing Campus, china university of Mining and Technology, beijing 100083, china 2 chinese Ecological Civilization Research and Promotion Association, beijing, 100035, china 3 Department of Environmental Science and Engineering, Tsinghua university, beijing 100084, china.

Catalytic wet oxidation of phenol was studied at various conditions. The effects of reaction conditions on the concentration histories of the intermediates were investigated. It shows that both Ru/C and Ru/ZrO2-CeO2 exhibited excellent activity in catalytic wet oxidation of phenol. Complete mineralization of phenol could not be obtained with both catalysts. In the oxidation of phenol with Ru/ZrO2-CeO2 main intermediates were including hydroquinone, p-benzoquinone, maleic acid, fumaric acid, Cis butenedioic anhydride, acrylic acid, malonic acid, oxalic aci, acetic acid and formic acid. The reaction conditions had great effect on the distribution of intermediates during the reaction. The oxygen storage capacity of ZrO2-CeO2 enhanced the activity of Ru/ZrO2-CeO2 for carboxylic acid oxidation. Reaction temperature was the most significant factor influencing both phenol conversion and intermediates distribution. The effect of pressure on phenol conversion was relatively small compared to the temperature, but the effect of it on the concentration history of intermediates was noticeable. Initial pH mainly influenced phenol chemistry and the concentration of radicals and thus influenced the concentration histories of intermediates. High initial pH can improve phenol conversion but decrease the oxidation rate of carboxylic acid. High initial phenol concentration resulted in more polymeric products adsorbed on the surface of Ru/ZrO2-CeO2 and thus decreased the transformation rate of phenol and organic acids.

关键词： Ru/ZrO2-CeO2 concentration history catalytic wet air oxidation

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Blockade of paeoniflorin on sodium current in mouse hippocampal CA1 neurons

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Acta Pharmacologica Sinica 2003年第12期24卷 74-78页

作者： ZHANG Guang-Qin, HAO Xue-Mei, CHEN Shi-Zhong~1, ZHOU Pei-Ai, CHENG He-Ping, WU Cai-Hong~2 State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life sciences, Peking university, beijing 100871 ~1Department of Traditional chinese Medicine, School of Pharmaceutical Science, Peking university, beijing 100083, china State Key Laboratory of Biomembrane and Membrane Biotechnology College of Life Sciences Peking University Beijing 100871

AIM: To study the blockade of paeoniflorin (Pae) on INain the acutely isolated hippocampus neurons of mice. METHODS: The whole-cell patch clamp technique was used. RESULTS: Pae inhibited INain frequency-dependent and concentration-dependent manners, with an IC50of 271μmol/L. Pae 0.3 mmol/L shifted the activation potential of the maximal INafrom -40 mV to -30 mV, shifted the steady-state activation and inactivation curves toward more positive and negative potentials by 10.8 mV, and 18.2 mV, respectively, and postponed the recovery of INainactivation state from (4.2±0.7) ms to (9.8±1.2) ms. CONCLUSION: Pae inhibited INain mouse hippocampus neurons.

关键词： hippocampus patch-clamp techniques paeoniflorin sodium channels

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苯酚羟基化合成苯二酚反应产物分离过程酚焦油的形成原因

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石油化工 2004年第11期33卷 1036-1040页

作者：张信芳张敬畅张光明张天巧清华大学深圳研究生院中国石化股份有限公司北京燕山分公司研究院北京102500 北京化工大学理学院

对苯酚羟基化合成苯二酚产物分离过程酚焦油的形成原因进行了研究。模拟研究表明,在含有邻苯二酚和对苯二酚的混合溶液中,邻苯二酚比对苯二酚更易氧化缩合生成酚焦油。苯酚羟基化反应液中催化剂残留和催化剂被溶解形成的金属离子对酚焦... 详细信息

对苯酚羟基化合成苯二酚产物分离过程酚焦油的形成原因进行了研究。模拟研究表明,在含有邻苯二酚和对苯二酚的混合溶液中,邻苯二酚比对苯二酚更易氧化缩合生成酚焦油。苯酚羟基化反应液中催化剂残留和催化剂被溶解形成的金属离子对酚焦油的形成具有促进作用;对苯醌的存在对酚焦油的生成具有促进作用;泄漏进入的氧或空气可加速苯二酚的氧化缩合反应;酚焦油生成量随常压脱水和减压精馏过程操作温度的升高、操作时间的延长而增加。醋酸能溶解催化剂活性组分,存在醋酸和金属离子残留问题,从而增加了羟基化反应产物分离过程酚焦油的生成量。在羟基化反应产物中加入Na2HSO3,使羟基化反应产物中的对苯醌还原,同时减少羟基化反应产物中的溶解氧含量,从而起到了抑制脱水和精馏过程中酚焦油生成的作用。

关键词：苯酚苯二酚产物分离酚焦油形成原因

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Frequency-stabilized Yb：fiber comb with a tapered single-mode fiber

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chinese Physics B 2016年第4期25卷 166-170页

作者：谢阳韩海年张龙于子蛟朱政侯磊庞利辉魏志义 School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

We demonstrate a stable Yb：fiber frequency comb with supercontinuum generation by using a specially designed tapered single-mode fiber, in which a spectrum spanning from 500 nm to 1500 nm is produced. The carrier-envelope offset signal of the Yb：fiber comb is measured with a signal-to-noise ratio of more than 40 dB and a linewidth narrower than 120 kHz. The repetition rate and carrier-envelope offset signals are simultaneously phase locked to a microwave reference frequency.

关键词： tapered single-mode fiber supercontinuum generation optical frequency comb

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NONISOTONIC REABSORPTION OF WATER AND STEADYSTATE DISTRIBUTION OF SODIUM ION IN RENAL DESCENDING LIMB OF HENLE

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chinese Science Bulletin 1985年第9期30卷 1277-1278页

作者：徐明瑜赵光陆 Departmant of Mathematics shandong University Jinan chinese academy of Medical sciences Beijing

Bossert and Schwartz proposed a conjecture that the quantity of water reabsorption in renal descending limb of Henle (DLH) is related to its surface area and water permeability of the wall. In this letter, by the use of mathematical model we proved their conjecture to be correct. The obtained results fit in with estimate value given by Leaf and Cotran by means of experiments. The glomerular ultrafiltrate which flows in DLH is mainly made up of water, sodium chloride and urea. Assuming that the wall of DLH is a kind of biological semi-permeable

关键词： descending glomerular permeability conjecture letter permeable correct Schwartz filtration tubule

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Application of YLD Calculation in Assessing Disease Data──An Analysis of 4 Diseases in 2 Regions

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Biomedical and Environmental sciences 1999年第4期12卷 260-269页

作者： MA EN-BO WANG RUO-TAO YANG GONG-HUAN AND MICHAEL R. PHILIPS(Union School of Public Health, Peking Union Medical college, 7 Pan Jia YuanNan Li, beijing 100027, china)(Institute of Epidemiology and Microbiology,chinese academy of Preventive Medicine, 27 Union School of Public Health Peking Union Medical College Beijing China

The objective of the curtent study is to discuss the problems related to how data is used to calculate Yeare Lost with Disability (YLD) with the method recommended by the World Bank. The study includes collecting useful data, estimating disease duration and average age of disease onset,adjusting incidence and prevalence data by means of a software programme, DISMOD (Harvard university Incidence & Prevalence Model), and assessing the importance of YLD calculation for different *** and fatality rates of 3 diseases were estimated by experts at 2 round *** rates, disease duration and average age of disease onset were calculated and adjusted by DISMOD. YLD due to schizothrenia is the highest among 4 diseases in two regions. YLD is 18. 88 % in disability adjusted life year for 4 diseases in Xiacheng District, and 19 .97 % in Fuyang *** data can be used for the calculation of YLD after being adjusted. DISMOD is a useful instrument to test the internal consistency of incidence, prevalence, rendssion and fatality rate. The adjusted data are acceptable to experts and DISMOD. To get rational remission and fatality rates, we can use a cohort method through expert consultations. To renect overall burden of disease, YLD calculation should be used.

关键词： An Analysis of 4 Diseases in 2 Regions

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THRUST TECTONICS AND RELATED CROSS-SECTION BALANCING IN THE SOUTHWESTERN FUJIAN FORELAND FOLD AND THRUST BELT

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Scientia Geologica Sinica 2000年第2期 151-158页

作者： Wu Yungao and Li Jiliang (Laboratory of Lithosphere Tectonic Evolution, Institute of Geology and Geophysics chinese academy of sciences, beijing 100029) Lu Huafu and Jia dong (Department of Geosciences, university of Nanjing Nanjing 210093)

On the basis of the data made by former geological researchers and our own studies, the thrust and nappe tectonics, widely found in the Mesozoic Southwestern Fujianforeland fold and thrust belt, can be classified into two types :①cover thrust sheets, ②basement thrust sheets, also called C-type thrust sheets (i.e. Composite thrust sheets). The main structural styles developed in the this belt include stepped thrust fault and fault-related fold such as fault-bend fold, imbricate fan and duplex, klippe and window,and back thrust. The main thrust direction was from SE to NW. Two typical balanced cross-sections and their restored ones are presented in the paper. The authors think that the mie shortened distance of the Southwestern Fujianforeland fold and thrust belt is between 47.7km and 170km, and the true shortened rate is between 25% and 54%.

关键词： In THRUST TECTONICS AND RELATED CROSS-SECTION BALANCING IN THE SOUTHWESTERN FUJIAN FORELAND FOLD AND THRUST BELT AL

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Modulation of presynaptic nAChRs on postsynaptic GABA receptor in optic tectum of juvenile Xenopus

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chinese Science Bulletin 2003年第5期48卷 417-423页

作者： WANG Hong & CAI Haoran (TSAI Haojan) First Hospital, Peking university, beijing 100034, china Correspondence should be adressed to Cai Haoran (e-mail: hjtsai@ ***) First Hospital Peking University China

Using the blind patch-clamp technique with the whole-cell mode, we have studied the modulation of pre-synaptic receptor on postsynaptic g-aminobutyric acid (GABA) receptor measuring miniature inhibitory postsy-naptic currents (mIPSCs) in optic tectum of Xenopus during critical peroid. It was demonstrated that compared with mature neurons, mIPSCs recorded from immature neurons had smaller amplitude and longer decay time. mIPSCs are mediated by GABAa receptor. The nicotinic acetylcholine receptor agonists (carbachol, cytisine, nicotine, DMPP and so on) could increase the frequency of mIPSCs. The enhance-ment of mIPSCs frequency induced by nAChR agonists was calcium-dependent. However, the choline, a product of hy-drolyzed acetylcholine, could not increase the frequency of mIPSCs. DH-b-E, a competitive antagonist of nAChR, blocked the increase of mIPSCs frequency induced by car-bachol. Mecamyllamine, an a3b4 subtype of nAChR antago-nist, also blocked the carbachol-induced enhancement of mIPSCs. On the other hand, MLA, a7 subtype of nAChR antagonist, had no effect on it. Thus, it seems that nAChR could presynaptically modulate the mIPSCs and a3b4 sub-type of nAChR might be involved. But a7 nAChR subtype of nAChR would not be involved. The modulation is calcium- dependent. Meanwhile, we found that Ca2+-free solution could elicit giant PSCs. The frequency of mIPSCs also is related with the level of HP.

关键词：视觉分析神经原突触前突触后伽马氨基丁酸感受器神经调节青少年

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Surgical Management of Traumatic Facial Paralysis:A Case Review Study

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Journal of Otology 2011年第2期6卷 38-42页

作者： YI Hai-jin1,LIU Pi-Nan2,YANG Shi-ming1 1Department of Otolaryngology,Head and Neck Surgery,Institute of Otolaryngology,chinese PLA General Hospital,beijing,china 2Department of neurosurgery division 9 and otolaryngeal-head and neck surgery,beijing Tiantan Hospital,Capital university of Medical Science,beijing,china Department of Otolaryngology Head and Neck Surgery Institute of Otolaryngology Chinese PLA General Hospital Beijing China Department of neurosurgery division 9 and otolaryngeal–head and neck surgery Beijing Tiantan HospitalCapital University of Medical Science BeijingChina

Objective To evaluate efficacy of surgical treatment in traumatic facial ***:Thirty-three cases were reviewed,including temporal bone fracture and iatrogenic facial nerve *** the patients were treated with various surgical methods according to their *** The mean percentage facial function improvement (House-Brackmann GradeⅠ-Ⅱ) was 86% in temporal bone fracture and function was improved after proper operation to iatrogenic facial nerve *** Patients with traumatic facial paralysis receive proved outcomes itreaed with proper surgical methods according to their particular condition of nerve injury.

关键词： traumatic facial paralysis temporal bone fracture surgical therapy iatrogenic facial nerve injury

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GRASSROOTS DEMOCRACY AND LOCAL GOVERNANCE:EVIDENCE FROM RURAL china

GRASSROOTS DEMOCRACY AND LOCAL GOVERNANCE:EVIDENCE FROM RURA...

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北京论坛（2006）文明的和谐与共同繁荣—对人类文明方式的思考

作者： Shuna Wang graduate student Department of Economics university of Virginia & Yang Yao Professor china Center for Economic Research Peking university beijing 100871,china

This paper studies the impacts of village elections on the accountability of the village committee,local fiscal sharing,and state taxation in rural china using data of 48 villages for the period of *** are found to substantially increase the share of public expenditures in the village budget,but reduce the shares of administrative costs and income handed to the township *** findings suggest that elections have enhanced the accountability of the village committee,but weakened local fiscal sharing and the state’s grip. No strong evidence is found that state taxation is affected by elections,nor it is found that the role of a more competitive election is different from that of a closed election.

关键词： grassroots democracy local governance village elections Asia china

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