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中药水提取物对乙醇脱氢酶活性影响的初步研究

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同济大学学报（医学版） 2002年第1期23卷 23-24,30页

作者：芦洁李文哲倪亚明北京理工大学材料科学研究中心北京100081 同济大学测试中心上海200092

目的　探讨八种中药水提取物对乙醇脱氢酶活性的影响 ,为中药在解酒、保护肝脏方面的应用提供酶学依据。方法　选择古方中常用的几味解酒保肝中药并按古方组方一首及市售解酒中药制剂 ,应用瓦勒—霍赫 (Valle&Hoch)法体外测定对乙醇脱... 详细信息

目的　探讨八种中药水提取物对乙醇脱氢酶活性的影响 ,为中药在解酒、保护肝脏方面的应用提供酶学依据。方法　选择古方中常用的几味解酒保肝中药并按古方组方一首及市售解酒中药制剂 ,应用瓦勒—霍赫 (Valle&Hoch)法体外测定对乙醇脱氢酶活性的影响。结果　传统中药白豆蔻、葛花水提物、复方解酒保肝茶、市售葛花王水提物使乙醇脱氢酶活性增高 ,激活率分别为 2..82.%、15 .95 %、40 .2.0 %和 14.31% ;其他中药水提物均呈现抑制 ,其中枳子抑制作用明显 (P <0 .0 5 )。结论　直观上白豆蔻、葛花、复方解酒保肝茶、市售葛花王水提物能提高乙醇脱氢酶活性 ,通过激活乙醇脱氢酶活性来降低乙醇的浓度可能是解酒中药的作用机制之一。

关键词：乙醇脱氢酶中草药水提物解酒影响急性酒精中毒

Heterogeneous reactions of SO_2.on ZnO particle surfaces

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Science china Chemistry 2011年第1期54卷 161-166页

作者： LI Jia,SHANG Jing & ZHU Tong State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering,Peking university,beijing 100871,{2. 1. State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China

Heterogeneous reactions of SO2.on ZnO particle surfaces were studied using in situ diffuse reflectance infrared Fourier transform spectroscopy （DRIFTS）. The influences of relative humidity （RH） and UV radiation （2. 365 nm） were investigated. In the absence of UV radiation, sulfite was the prominent product on the particle surfaces, and a negative relationship between RH and sulfite production was observed. In the presence of UV radiation, infrared （IR） absorption of sulfite and sulfate was evident in the spectra. With increasing RH or UV intensity, sulfite was gradually transformed into sulfate. UV intensity and RH exhibited a synergistic effect on the heterogeneous oxidation of SO2.on ZnO. On dry particles and with no UV radiation, the reaction order of SO2.on ZnO particles was 1.6. The initial uptake coefficient for the formation of sulfite, using the Brunauer-Emmett-Teller （BET） area as the reactive surface area of SO2. was 4.87 × 10^-6. At 40% RH and with UV radiation, the reaction order was 0.91, and the initial uptake coefficient was 2.2. ×10^-5.

关键词： SO2 ZnO DRIFTS heterogeneous oxidation UV radiation

网络文化与人文奥运——对新世纪弘扬中华民族传统体育文化的思考

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体育学刊 2002年第5期9卷 14-16页

作者：韩晓东张细谦北京体育大学研究生部北京100084 广州教育学院体育系广东广州510030

在线网络一经产生就与奥林匹克运动文化的传播结下了不解之缘。网络空间中同质化和异质化这两种不同的文化牵引力 ,势必引发网络文化冲突与网络文化合作两种主要的网络文化态势。在分析“人文奥运”的真谛与奥林匹克主义的本质相同的基... 详细信息

在线网络一经产生就与奥林匹克运动文化的传播结下了不解之缘。网络空间中同质化和异质化这两种不同的文化牵引力 ,势必引发网络文化冲突与网络文化合作两种主要的网络文化态势。在分析“人文奥运”的真谛与奥林匹克主义的本质相同的基础上 ,提出新世纪弘扬中华民族传统体育文化的若干思考。

关键词：网络文化人文奥运

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盐渍化土壤肥力演变规律研究

土壤通报 2001年第Z1期32卷 41-45页

作者：牛灵安郝晋珉河北省邯郸市农业学校河北邯郸056001 中国农业大学北京100094

本文是在曲周试验区的长期定位试验和大田调查的基础上　，研究了盐渍化土壤在改良、利用及培肥过程中，构成土壤肥力的主要因素的演变规律．研　究结果表明：土壤有机质含量从治理初期的小于５ｇ／ｋｇ提高到１５　ｇ／ｋｇ左右；土壤... 详细信息

本文是在曲周试验区的长期定位试验和大田调查的基础上　，研究了盐渍化土壤在改良、利用及培肥过程中，构成土壤肥力的主要因素的演变规律．研　究结果表明：土壤有机质含量从治理初期的小于５ｇ／ｋｇ提高到１５　ｇ／ｋｇ左右；土壤碱解氮从开　始的富氮假象，逐步出现土壤碱解氮含量迅速下降的现象，再缓慢上升到７０～８０ｍｇ／ｋｇ，有　的甚至超过了１３０　ｍｇ／ｋｇ；土壤有效磷含量从２～３　ｍｇ／ｋｇ或者只有０．５～１　ｍｇ／ｋｇ左右，有的　地块近于零提高到１５～２０　ｍｇ／ｋｇ，有的已接近６０　ｍｇ／ｋｇ；土壤速效钾含量则由治理初期的２０　０　ｍｇ／ｋｇ，下降到３０　ｍｇ／ｋｇ左右；土壤微生物量明显增加，理化性状不断改善，熟化程度逐　步提高；土壤肥力的变化表现出了阶段性特征．提出了盐渍化土壤的合理施肥技术．

关键词：土壤肥力土壤微生物量氮磷钾

Experimental Study On The Distribution Of Particles Concentration Of Gas-Solid Fluidized Bed With Disparately Sized Binary Particles

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Experimental Study On The Distribution Of Particles Concentr...

A GMM-Based Algorithm for Classification of Radar Emitters

中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Jiantao Cao~(1,2.,Zhonghu Cheng~1,Yitian Fang~1,Yang Wang~1 (1.Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan,Shanxi 030001,china 2.Graduate university of the Chinese Academy of Sciences,{2. 100039,china)

＜正＞Experiments were carried out to study the concentration distribution of disparately sized binary particle in the jet region of a 1-m dia ＆ 8-m high semicircular jetting fluidized bed with a conical *** particles concentration was measured by the optical fiber probe system and *** fine particles were injected coaxially to simulate fines recycled into the jet high temperature region in an actual operating unit with different fine particles feed-in *** was found that the coarse particles concentration increases when the jet gas-velocity reaches to the certain *** distributor gas-velocity increasing results in the increasing of the time-averaged particles volume concentration in the jet *** annular gas-velocity increase causes the particles concentration to *** there is high fine concentration existing in the jet region of large jetting fluidized *** fine particles concentration in the jet region increases with the increasing of fine particles feed-in quantity,and the fine concentration increased toward the bed surface. When reaching to a certain bed height,the fine concentration begins to decrease.

关键词： Fluidized bed Particle concentration Binary particles Distinct size difference Jet

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A GMM-Based Algorithm for Classification of Radar Emitters

A NEW NUMERICAL MODEL FOR THREE DIMENSIONAL SURFACE WATER FLOWS

2.08 9th International Conference on Signal Processing(ICSP’2.08)

作者： Xuhua Gong Huadong Meng Xiqin Wang Department of Electronic Engineering tsinghua university beijing 100084 P.R.{2.

A Gaussian Mixture Model（GMM）-based Algorithm for the Classification of Radar emitters in autonomous Electronic Support Measure Systems is described in this *** first build a Gaussian model for every radar emitter,and then use the Expectation-Maximization（EM） Algorithm to train the parameters of the ***,we construct a classifier whose input is the parameters of pulse and whose output is the type of *** of experiments and comparisons with Neural network Algorithm（Fuzzy ARTMAP） demonstrate that the proposed algorithm is effective in the condition of low SNR.

关键词： Gaussian Mixture Model(GMM) Classification of Radar Emitters EM Algorithm Neural network(NN)

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Journal of Hydrodynamics 1991年第4期3卷 104-108页

作者： Han Guo-qi Wang De-guan Hohai university,Nanjing 2.002.,P.R.chinaXu Xie-qing Water Conservancy and Hydroelectric Power {2. Institute,beijing,100044,P.R.china

A three dimensional numerical model based on the Reynolds equations is presented that can be used to predict the surface water flow in open *** model uses a computational mesh that conforms to the free water sur- face and the bottom of the channel so that the accuracy of boundary condition application,code complexity,and e- conomy could be *** k-ε turbulence model is used to estimate the eddy viscosity *** of using the“rigid-lid”approximation a 2.D equation derived from integrating the continuity equation over the total depth is adopted to determine the elevation of the free water surface.A new algorithm is presented based on the conventional SIMPLE *** block correction technique is employed to enhance rate of convergence. The model presented is applied to a bottom discharge into a rectangular straight channel for three dimensional phenomena to obtain the free water surface configuration,velocities and *** computed results are in good agreement with the previous experimental values.

关键词： A NEW NUMERICAL MODEL FOR THREE DIMENSIONAL SURFACE WATER FLOWS

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FA旱地龙在京郊甜瓜栽培上的应用研究

水土保持学报 2005年第5期19卷 183-185,194页

作者：徐磊杨培岭韩玉国张文理刘洪禄中国农业大学北京100083 北京水利水电技术中心北京100073 北京市水利科学研究所北京100044

通过正交试验,探讨了在温室栽培条件下采用黄腐酸类抗旱节水剂FA旱地龙对土壤含水率,甜瓜的生长速率,甜瓜产量、品质(主要指可溶性固形物)的影响。结果表明FA旱地龙中可以抗旱保墒,对促进甜瓜生长,提高甜瓜产量,改善甜瓜品质有着积极作... 详细信息

通过正交试验,探讨了在温室栽培条件下采用黄腐酸类抗旱节水剂FA旱地龙对土壤含水率,甜瓜的生长速率,甜瓜产量、品质(主要指可溶性固形物)的影响。结果表明FA旱地龙中可以抗旱保墒,对促进甜瓜生长,提高甜瓜产量,改善甜瓜品质有着积极作用,通过试验给出了合理的施用方式和施用量。

关键词： FA早地龙甜瓜施用方式施用量

Response of canopy quantum yield of alpine meadow to temperature under low atmospheric pressure on Tibetan Plateau

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Science china Earth Sciences 2006年第S2期49卷 219-225页

作者： XU Lingling, ZHANG Xianzhou, SHI Peili & YU Guirui Institute of Geographic Sciences and Natural Resources research, Chinese Academy of Sciences, beijing 100101, {2. Graduate university of the Chinese Academy of Sciences, beijing 100049, {2. 1. Institute of Geographic Sciences and Natural Resources research Chinese Academy of Sciences Beijing 100101 China 2. Graduate university of the Chinese Academy of Sciences Beijing 100049 China

An open-path eddy covariance system was set up in Damxung rangeland station to measure the carbon flux from July to October, 2.03. The canopy quantum yield (α) of alpine meadow was calculated by the linear function between the net ecosystem carbon dioxide exchange (NEE) and the photosynthetic active radiation (PAR) under low light, and how it was influenced by the temperature was also discussed. Results showed that the canopy or decreased almost linearly with temperature, with the decrease in every 1℃increase of temperature similar to those measured on leaf level of C3 plant. At the beginning, the decrease of canopyαwith temperature was 0.0005 umol CO2.μmol-1 PAR; while it increased to 0.0008μmol CO2.μmol-1 PAR in September, showing a rising trend with plant growing stages. Compared with the canopy a calculated with rectangular hyperbola function, the value in the paper was lower. However, the method advanced here has the advantages in examining the relationship betweenαand the key environmental factors, such as temperature.

关键词： Tibetan Plateau alpine meadow canopy quantum yield temperature.