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| 1 | POLYMER CHARGE AND MOLECULAR WEIGHT EFFECTS ON TREATED IRRIGATION FURROW PROCESSES显示文摘Application of 5-10 mg L-1 water soluble anionic polyacrylamide (PAM) to furrow irrigation water during flow advance substantially reduces sediment loss and increases net infiltration. We hypothesized that PAM_s solvated molecular conformation influences its irrigation-management efficacy. The study was conducted in Kimberly, Idaho, on Portneuf silt loam (Durinodic Xeric Haplocalcids), under furrowirrigated beans (Phaseolus vulgaris ) at a 1.5% slope. Polyacrylamides with contrasting molecular weight (anionic; 4-7, 12- 15 and 14-17 MDa, i.e. Mg mol-1 ), charge type (neutral, anionic, cationic), and charge density (8, 19, 35 mol %) were tested in two studies. Inflow rate was 23 L min-1 during furrow advance, and 15 L min-1 for the remaining set. Anionic and neutral PAMs were twice as effective as cationic PAMs for controlling sediment loss in new furrows. The order of effectiveness for overall soilloss control was : anionic >neutral >cationic PAM, and efficacy increased with increasing charge density and/or molecular weight. Net furrow infiltration increased by 14 to 19% when PAM treatment molecular weight was reduced from 17 to 4 MDa. General trends suggested that medium and high charge density anionic and neutral PAM produced the greatest increase in infiltration compared with controls.Compared with untreated furrows, neutral PAM gave the greatest season-long net infiltration gains (5%),while charged PAMs tended to increase net infiltration early in the season on new furrows but decreased infiltration on repeat-irrigated furrows later in the season. | R. D. Lentz(USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, ID)R. E. Sojka (Landcare Research, New Zealand, Ltd, Palmerston North, New ZealandNote: The manucript of this paper was received in March 1999, Discussion open until March | 2000 | International Journal of Sediment Research2000，15，1： | 13 |
| 2 | Effect of Combined Heavy Metal Pollution on Nitrogen Mineralization Potential,Urease and Phosphatase Activities in a Typic Udic Ferrisol显示文摘INTRODUCTIONAnthropogenicactivitiessuchasmining,smelting,electroplating,ore-refiningandlanddisposalofwasteshaveledtoanincreajseofheavymetalcolltelltsinthesoil(Chen,1996).Heavymetalaccumulationinthesoilimpactsanumberofsoilpropertiesthatmightbethepoten... | ZHENG CHUNRONG TU CONG and CHEN HUAIMAN(Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences,Nanjing 210008 (China))(Received April 20, 1999 revised June 2, 1999) | 1999 | Pedosphere1999，9，3： | 13 |
| 3 | Effect of Cr(Ⅵ) and p-Chloroaniline Interaction on Their Reaction Behaviors on Soil Colloids显示文摘INTRODUCTIONStudiesonheavymetalororganicpollutantsinsoilhaverecedelymadegreatprogressboththeoreticallyandpractically.However,pollutionisusuallydevelopedbynotasinglebutamulti-substratecomplex.Furtherunderstandingthemechanismsandprocedureofmulti-substr... | ZHOU DONGMEI and CHEN HUAIMAN(Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences,Nanjing 21O008 (China))(Received April 14, 1999 revised June 8, 1999) | 1999 | Pedosphere1999，9，3： | 8 |
| 4 | Rapid detection of sepsis complicating acute necrotizing pancreatitis using polymerase chain reaction显示文摘INTRODUCTIONAcute narcotizing pancreatitis usually takes a severe clinical course and is associated with multiple organ dysfunction .With the further understanding of pathophysiological events of acute pancreatisis and the therapeutic measuses taken by the clinicians ,the patients can pass through the critical carry stages ,and then the septic complication caused by rtanslocated bacteria, mostly gram-negative microbes from the intestines ensues[1]. | Wei Zhong Zhang1 Tian Quan Han2 Yao Qing Tang2 Sheng Dao Zhang2 1Department of Surgery. Huangyan First Hospital, Huangyan 318020, Zhejiang Province. China 2Department of Surgery. Ruijin Hospital. Shanghai Second Medical University. Shanghai 200025. ChinaDr. Wei Zhong Zhang, graduated from Shanghai Second MedicalUniversity receiving master degree of surgery in 1999 he is devoted to basic and clinical investigation on severe acute pancreatitis and has one paper published. | 2001 | World Journal of Gastroenterology2001，7，2： | 7 |
| 5 | 医院门诊人群高血压的患病及危险度分层情况-1999年医院门诊人群高血压抽样调查报告显示文摘目的 了解门诊人群高血压的患病比例及危险度分层情况。方法 横断面性质的流行病学研究。采用国际通用的现场测量与问卷调查相结合的标准方法 ,分别在中国北方、南方和中部 8个城市 ,选择 18家医院 (其中三级医院 10家 ,二级医院 6家 ,一级医院 2家 ) ,对来这些医院内科、妇科和其它科门诊就诊的 35岁及以上患者进行了专项调查。结果 本次共调查 970 3人 ,一级医院、二级医院、三级医院分别入选 12 16例 (12 5 % ) ,2 32 4例 (2 4 0 % )及6 16 3例 (6 3 5 % ) ,性别、年龄比例基本平衡。被调查人群患高血压的比例达 46 5 % ,无论男女 ,均随年龄递增。一、二、三级医院中 ,门诊人群高血压患病比例分别为 5 5 8% ,5 1 5 %和 42 8%。高血压病人新检出率为 10 6 % ,其中内科 10 7% ,妇科 7 9% ,其他科 11 7% ,占全部高血压患者数的 2 2 8%。危险度分层表明 ,低、中、高和极高危度的比例分别为 3 2 %、2 1 4%、2 0 5 %和 5 4 9%。各层血压均值全落在高血压Ⅰ级水平。结论 35岁以上人群高血压发病比例较高 ,且大多数为高。 | 中国1999年医院门诊人群高血压抽样调查协作组 | 2001 | 高血压杂志2001，9，4： | 6 |
| 6 | 175型无橡胶元件涡轮钻具的研制与试验显示文摘介绍了江汉石油学院井下工具研究室研制的175型无橡胶元件涡轮钻具的简况,重点叙述了这种涡轮钻具的结构特点、涡轮叶栅与叶型设计,以及涡轮节和支承节的结构设计,给出了技术性能指标。这种无橡胶元件的涡轮钻具,采用整体式4支点金属滚动球轴承、径向TC轴承、下轴悬挂式涡轮节和大扭矩叶型,具有中速、低压降等特点。现场试验表明,175型涡轮钻具的性能满足目前钻井工艺和钻井泵的要求,用它快速钻井可提高井身质量和机械钻速,缩短建井周期,减少套管磨损,降低钻井成本。 | Downhole Tool Research Section of Jianghan Petroleum University( Jingzhou City, Hubei Province ). , 1999, 27(12): 31~33 | 1999 | 石油机械1999，27，12： | 5 |
| 7 | A CELLULAR AUTOMATON-APPROACH TO SIMULATION OFGRAIN STRUCTURE DEVELOPMENT INELECTROSLAG CASTING显示文摘A 3-D cellular automaton model of thermal transfer and solidification has been developed, aiming at a simulational study of the grain structure development in electroslag casting. The program we developed for simulation of the model allows the effects of both metallurgical factors, including solidification point, supercooling required for nucleation and its scattering, and liquid/solid interface energy, and thermophysical factors, including heat conduction coeffcients, heat transfer coefficients and latent heat, to be investigated. The effect of process control can be indirectly inspected with the simulation by varying the melting rate. A box counting algorithm was employed to estimate the local curvature of liquid/solid interface. A series of simulated experiments of electroslag casting processes have been carried out. The simulation started from the beginning of the electroslag casting and proceeds by iteration of certain rules, during which a uniform constant slag temperature and a constant melting rate were assumed. It has been observed that a pool of molten metal forms and deepens gradually under constant melting rate. The deepening of the pool slows down with the simulated electroslag casting process, and the depth and shape of the pool tends to be steady after certain height of cast is formed. A finger-like grain structure with the fingers approximately normal to the bottom of the molten metal pool was generally observed. Higher latent heat was found to enhance dendritic growth. The results agree well with general observation of the grain structures in electroslag castings and demonstrate the applicability of cellular automaton modeling to structural development in casting. | X.Q. Wei and L. Zhou School of Mechanical Electrical Engineering and School of Chemistry and Materials Science, Nanchang University, Nanchang 330029, China Manuscript received 30 July 1999 | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 8 | Syntheses and Liquid Crystal Properties of New Rare Earth Sandwich Type Heteropoly Compounds显示文摘 | BI Li hua \{**\}, LIU Jing hua *** , WANG En bo **** , HUANG Ru dan YU Yong zhang and WU Ping song (Department of Chemistry, Northeast Normal University, Changchun 130024, P.R. China) (Received March 29, 1999) | 1999 | Chemical Research in Chinese Universities1999，15，4： | 2 |
| 9 | 中国门诊人群高血压和糖尿病抽样调查分析显示文摘 | 中国1999年医院门诊人群高血压抽样调查协作组 | 2002 | 山西医药杂志2002，31，4： | 2 |
| 10 | Lipoxygenases:occurrence,functions,catalysis,and acquisition of substrate显示文摘 | Brash AR 1999 | 1999 | J Biol Chem1999，274，23： | 2 |
| 11 | A jasmonate-responsive lipoxygenase of barley leavesis induced by plant activators but not by pathogens显示文摘 | Hause B Voros K Kogel KH 1999 | 1999 | J Plant Physiol1999，154，： | 2 |
| 12 | Globalization as Reterritorialisation the Re-Scaling of Urban Governance in the European Union显示文摘 | Brenner (1999) | 1999 | Urban Studies1999，336，33： | 2 |
| 13 | Magnetostriction of Pseudobinary Compounds Pr_(0.15)Tb_xDy_(0.85-x)Fe_2(x=0 to 0.85)显示文摘The compound ingots of Pr0.15TbxDy0.85-xFe2 (x=0 to 0.85) were prepared by arc melting in a water Cu boat using arc furnace under a purified Ar atmosphere. Appropriate annealing (850℃, 100 h) can obtain single Laves phase compound. The magnetostriction for these systems will rise obviously when partially substituted Tb or Dy by Pr. | Yangxian LI and Jingping QU (Hebei University of Technology, Tianjin 300130, China) Chengchun TANG, Guangheng WU and Wenshan ZHAN (State Key Laboratory for Magnetism, Institute of Physics, CAS, BeiJing 100080, China) | 2000 | Journal of Materials Science & Technology2000，16，6： | 2 |
| 14 | The effects of sex ratio on sexual competition in the European lobster 显示文摘 | Valerie JD Julian TA John DR 1999 | 1999 | Animal Behaviour1999，58，： | 1 |
| 15 | Activation tagging of the floral inducer FT 显示文摘 | Kardailsky I Shukla VK Ahn JH 1999 | 1962 | Science1962，286，： | 1 |
| 16 | Application of Freundlich and Langnmir models to muhistage purification process to remove heavy metal ions by using Schizomeris leibleinii显示文摘 | Ozer A Ozer D H Ekiz I 1999 | 1999 | Process Biochemistry1999，34，： | 1 |
| 17 | Electrocoating显示文摘 | Oravitz J J 1999 | 1999 | Metal Finishing1999，97，： | 1 |
| 18 | Paul Kgrngman' s Geographical economics, industrial clustering and the British motor sport industry 显示文摘 | Steven Pinch Nick Henry 1999 | 1999 | Regional Studies1999，33，9： | 1 |
| 19 | Input,interaction and second language development: an empirical study of question formation in ESL 显示文摘 | Mackey A- 1999 | 1999 | Studies in Second Language Acquisition1999，21，4： | 1 |
| 20 | The water balance of the Susquehanna River basin and its response to climate change显示文摘 | NAJJAR R G 1999 | 1999 | Journal of Hydrology1999，219，： | 1 |
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