mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Water-Induced Degradation in Lead Zinc Niobate–Lead Zirconate Titanate Soft Piezoelectric Ceramics

Water-induced degradation of lead zinc niobate–lead zirconate titanate (Pb(Zn1/3Nb2/3)O3–Pb(ZrTi)O3) soft piezoelectric ceramics is studied using electrochemical hydrogen charging, in which the silver electrodes of the piezoelectric ceramics constitute a cathode in 0.01-M NaOH solution to evolve hydrogen by electrolysis of water. It is found that with the increasing hydrogen charging time, the resonance impedance increases, the difference between the resonance frequency and the anti-resonance frequency decreases, the spontaneous polarization, the remanent polarization and the piezoelectric coefficient d33 decrease. The degradation behaviour of the soft piezoelectric ceramics can be explained to hydrogen incorporating into the lattice and forming hydroxy (OH-) bonds in the perovskite structure, which prevents the Ti ions from switching and increases the coercive field Ec. The degradation characteristics of the soft piezoelectric ceramics are quite different from that of lead zirconate titanate hard piezoelectric ceramics.
Reorientation of Defect Dipoles in Ferroelectric Ceramics

We investigate the frequency, temperature, tetragonality and quenched temperature dependences of the hysteresis loops in Pb[(Zr0.52Ti0.48)0.95(Mn1/3Nb2/3)0.05]O3 (PMnN-PZT) ceramics. It has been demonstrated that the polarization-field hysteresis curves show ``pinched'' shapes when tested at room temperature, higher frequency or using the large-tetragonality specimen. While normal square-like loops are observed at 200°C and 0.01 Hz or using the small-tetragonality one. Meanwhile, close relations between the P–E loops and the applied frequency, temperature or tetragonality reveal that there exists a typical relaxation time corresponding to the reorientation of the defect dipoles. It can be seen further from the quenched temperature dependences of the loops that the reorientation of the defect dipoles may influence the pinching. Compared to the intrinsic depinning procedure induced by changes of the distribution of defect dipoles, we provide new evidence for extrinsic depinning mechanism of the defect dipoles in the ferroelectric ceramics.
Sensitivity Improvement by UV-Light Recording in LiNbO3:Ce:Cu Crystals

Modulated UV light is used to increase the sensitivity of the two-centre holographic recording. Inherent mechanisms of nonvolatile holographic recording in oxidized and reduced crystals are numerically analysed based on solving the two-centre material equations modified for UV-light recording. Experiments verification is performed with an oxidized crystal and a reduced crystal, and the role of UV intensity on the sensitivity is presented.
Stereodynamics and Rovibrational Effect for H+NH3→H2+NH2 Reaction

We employ the semirigid vibrating rotor target (SVRT) model to study the influence of rotational and vibrational excitation of the reagent on reactivity for the reaction H+NH3. The excitation of the pseudo H–NH2 stretching vibration of the SVRT model gives significant enhancement of reaction probability. Detailed study of the influence of initial rotational states on reaction probability shows strong steric effect. The steric effect of polyatomic reactions, treated by the SVRT model, is more complex and richer than theoretical calculations involving linear molecular models.
中药辐射灭菌的原理和安全评价

中药是我国传统医药学的宝贵财富,我国有雄厚的中医用药理论和丰富的临床经验.几千年来,中医药为保护中华民族的健康、繁衍生命、抗御疾病作出了巨大的贡献.灭菌是中药生产的一道重要工序,关系中药制品的质量.中药灭菌方法主要有4类:水洗除菌、化学灭菌、热灭菌、辐射灭菌.……
悬浮聚合法制备咖啡因分子印迹聚合物微球及其性能研究

目的建立一种分析测定中草药的方法,并对生物碱有效成分进行分离.方法以咖啡因为模板分子,采用水溶液悬浮聚合法制备了用于色谱分离(作HPLC的固定相)的微米级分子印迹聚合物微球(MIPMs).结果当以茶叶碱为竞争分子时,MIPMs对咖啡因有强的吸附和特异性选择识别能力.结论该MIPMs能对茶叶中的咖啡因进行分离富集.
水稻不同耐冷品种光呼吸对低温的反应

水稻在温度低于10～12℃时就会表现出冷害症状,冷害可引起水稻代谢和生理过程的伤害,造成膜透性增加,叶绿素合成受阻[1,2]和叶绿体结构破坏[3].光呼吸在耗散过剩光能、保护光合机构和避免光氧化等方面起重要作用[4].光呼吸还可通过乙醇酸的消耗促进无机磷(Pi)的周转,缓解Pi不足对光合作用的限制[5].水稻叶片的光合作用对低温特别敏感,低温下水稻幼苗的光合磷酸化和Calvin循环有关酶活性受到抑制[6].但对低温下不同耐冷性品种的水稻光合和光呼吸的比较研究很少.笔者曾报告,低温下水稻耐冷性品种湘糯1号比冷敏感品种IR50有较高的抗氧化酶活性和抗氧化剂含量[7].本文研究了低温下水稻耐冷品种湘糯1号和冷敏感品种IR50的伤害及光合作用和光呼吸的变化,为进一步揭示水稻低温下光合作用的运转和调节及水稻耐冷机理提供依据.……
低磷胁迫对不同基因型玉米主要生理生化特性的影响

磷是植物生长发育不可缺少的营养元素之一,不仅是植物体内许多重要化合物的组分,而且还以多种途径参与植物代谢.植物所需磷素的主要来源于根系自土壤的吸收[1].红壤对磷素有强大的固定能力,而且当pH值低于6时,其固定值随pH值的下降而线性增大,使磷在土壤溶液中的浓度下降,有效性降低[2].有研究表明,低磷胁迫降低小麦、玉米叶绿素含量,抑制叶片的硝酸还原酶活性,显著提高小麦、玉米等作物的叶片、根、甚至全株的酸性磷酸酯酶活性,导致甘蔗叶片丙二醛含量增加,且耐性差的品种较明显和较早发生[3～7].……
统计法运动单位数目估计的研究进展

运动单位数目估计(motor unit number estimation,MUNE)是一种定量测定支配某一骨骼肌或肌群的有功能的下运动神经元数目的电生理技术.自1971年McComas等[1]首先描述MUNE技术以来,目前用于进行MUNE测定的方法已经有多种,统计法MUNE测定即为其中的一种,该方法于1995年由Daube [2]提出,并成为目前广泛研究的MUNE测定方法之一.……
腰椎快速牵引

腰椎牵引是治疗腰椎间盘突出症的有效方法.根据牵引力的大小和作用时间的长短,将牵引分为慢速牵引和快速牵引.慢速牵引的重量为患者体重的30%-120%,每次牵引时间20-40min,需多次牵引,是临床治疗腰椎间盘突出症的常用方法[1].快速牵引重量大,为患者体重的1.5-2倍,作用时间短(0.5-2s),多在牵引的同时加中医的正骨手法,该型牵引源于中医的"人工拉压复位"法.近10年,临床上多用多方位牵引,即三维多功能牵引,由于其应用时间较短,目前尚无统一命名.该类牵引床在治疗时可同时完成3个基本动作:水平牵引、腰椎屈曲或伸展、腰椎旋转[2].……
花后干旱和渍水下氮素供应对小麦旗叶衰老和粒重的影响

小麦生育后期的显著特征是叶片衰老与籽粒生长发育同步进行.花后土壤干旱和渍水状况下,小麦发生早衰,植株光合功能不可逆转地迅速下降,物质运转分配等生理过程发生紊乱,导致生长发育和衰老进程及生理代谢功能失调,最终影响其产量和品质[1,2].……
电磁波在饱和无粘性土中的传播特性及试验研究

目前工程中大多采用取样法测试土的孔隙比,该方法对土层产生扰动,深层取样困难,不能长期定点监测且测试有时间滞后性.与之相比,现场测试方法能克服这些缺点,具有取样法无法比拟的优势.电磁法是近年来发展很快的一种快速的现场测试方法.该方法利用电磁波在土中的传播速度和土介质介电常数与土的物理性质指标关系测土的孔隙比和含水量.研究电磁波在土中的传播特性,进而获得电磁波在土中的传播速度和土介质介电常数与土的孔隙比和含水量之间的关系,作为现场测试土的孔隙比和含水量的依据,具有重要的意义.……
三江平原沼泽湿地开垦对表土有机碳组分的影响

土壤有机碳是土壤质量评价和土地资源可持续利用管理中必须考虑的重要指标,其质量和数量影响土壤的物理、化学和生物特征及其过程.但是,利用总有机碳来评价土地利用方式对土壤碳动态的影响,特别是在土壤中稳定有机碳背景较高的情况下,是非常困难的[1].因此,需要敏感性评价指标研究土壤有机碳动态.用物理方法把土壤有机质分为游离态轻组、包裹态轻组和重组等不同组分,对于准确评价土地利用变化影响土壤碳过程具有重要意义[2,3].……
面向点状对象的空间距离谓词计算方法

空间距离谓词主要用于描述空间对象间的距离关系.带有距离度量的连接索引方法主要是将不同空间对象的索引连接起来,以空间对象间的距离值作为空间关系的度量,将连接的索引、空间对象间的距离、由距离产生的各个空间关系构成空间对象的关系表,从而提高空间对象之间距离关系的查询速度.笔者认为,该方法仅适用于少量空间对象间的距离谓词提取和计算.如果空间数据库中存储大量的点状空间对象,使用以上方法对每两个空间对象建立连接索引,进行笛卡尔乘积运算,则会形成庞大的结果集合,从而增加空间距离谓词的存储空间和搜索时间.电子地图中包含数量巨大的小型空间对象(如企业的海量客户、汽车等),分别计算每个空间对象与其他对象的距离关系是极其困难的.现有方法难以实现海量点空间对象的距离谓词计算.……
On the Mechanism of the Locking of the El Nino Event Onset Phase to Boreal Spring

The mechanism of the locking of the El Nino event onset phase to boreal spring (from April to June)in an intermediate coupled ocean-atmosphere model is investigated. The results show that the seasonal variation of the zonal wind anomaly over the equatorial Pacific associated with the seasonal variation of the ITCZ is the mechanism of the locking in the model. From January to March of the El Nino year, the western wind anomaly over the western equatorial Pacific can excite the downwelling Kelvin wave that propagates eastward to the eastern and middle Pacific by April to June. From April to December of the year before the El Nino year, the eastern wind anomaly over the equatorial Pacific forces the downwelling Rossby waves that modulate the ENSO cycle. The modulation and the reflection at the western boundary modulate the time of the transition from the cool to the warm phase to September of the year before the El Nino year and cause the strongest downwelling Kelvin wave from the reflected Rossby waves at the western boundary to arrive in the middle and eastern equatorial Pacific by April to June of the El Nino year. The superposition of these two kinds of downwelling Kelvin waves causes the El Nino event to tend to occur from April to June.
South China Sea Summer Monsoon Onset in Relation to the Off-Equatorial ITCZ

Observations of the South China Sea summer monsoon (SCSSM) demonstrate the different features between the early and late onsets of the monsoon. The determining factor related to the onset and the resultant monsoon rainfall might be the off-equatorial ITCZ besides the land-sea thermal contrast. The northward-propagating cumulus convection over the northern Indian Ocean could enhance the monsoon trough so that the effect of the horizontal advection of moisture and heat is substantially increased, thus westerlies can eventually penetrate and prevail over the South China Sea (SCS) region.
Black Carbon Particles in the Urban Atmosphere in Beijing

A study of the concentration of black carbon particles and its variation in the urban atmosphere has been carried out since 1996 in the Beijing area. The measurements were done in the late autumn and early winter each year, the period before and after domestic heating activities begin. The results show the presence of black carbon particles at the high level that vary over a large range in the urban atmosphere in Beijing. The mean value of daily average concentration for the whole observation period of 1996-2004is 20.0μg m-3. An evident decrease of black carbon particle concentration in the Beijing area is observed after 2000, and the daily average concentration of black carbon particles is estimated to be 16.0μg m-3with a variation range of 2.10-50.50μg m-3 for the period of 2000-2004. The observation method and main variation behavior characteristics of black carbon particles in the urban atmosphere in the Beijing area are given and discussed.
Intraseasonal Oscillation in the Tropical Indian Ocean

The features of the intraseasonal oscillation (ISO) of the tropical Indian Ocean are studied using several sources of observational data. It is shown that there are intraseasonal oscillations in the tropical Indian Ocean, but their periods vary with latitude: the major period is about 20-30 days in the equatorial region, about 30-50 days at 10°N/10°S latitude and 60-90 days at 20°N/20°S latitude. The intensity of the ISO increases with latitude but the speed of the westward propagation of the ISO decreases with latitude. The intensity and propagation speed of the ISO have clear interannual variation features. The atmospheric intraseasonal oscillation over the tropical Indian Ocean is also analyzed and compared with the oceanic intraseasonal oscillation. It is shown that the major period is in the range 30-60 days and the intensity and period of the atmospheric ISO decrease with latitude slightly. The zonal propagation of the atmospheric ISO also has some differences with the oceanic ISO. It is necessary to study the relationship between the atmospheric ISO and oceanic ISO in the tropical Indian Ocean deeply.
Atmospheric Profile Retrieval with AIRS Data and Validation at the ARM CART Site

The physical retrieval algorithm of atmospheric temperature and moisture distribution from the Atmospheric InfraRed Sounder (AIRS) radiances is presented. The retrieval algorithm is applied to AIRS clear-sky radiance measurements. The algorithm employs a statistical retrieval followed by a subsequent nonlinear physical retrieval. The regression coefficients for the statistical retrieval are derived from a dataset of global radiosonde observations (RAOBs) comprising atmospheric temperature, moisture, and ozone profiles. Evaluation of the retrieved profiles is performed by a comparison with RAOBs from the Atmospheric Radiation Measurement (ARM) Program Cloud And Radiation Testbed (CART) in Oklahoma,U. S. A.. Comparisons show that the physically-based AIRS retrievals agree with the RAOBs from the ARM CART site with a Root Mean Square Error (RMSE) of 1 K on average for temperature profiles above 850 hPa, and approximately 10% on average for relative humidity profiles. With its improved spectral resolution, AIRS depicts more detailed structure than the current Geostationary Operational Environmental Satellite (GOES) sounder when comparing AIRS sounding retrievals with the operational GOES sounding products.
HPLC法测定银黄片中黄芩苷的含量

目的:测定银黄片中黄芩苷的含量.方法:HPLC法,流动相为甲醇-水-冰醋酸(50∶ 50∶ 1);检测波长:274 nm.结果:黄芩苷在5.056～25.28ug/ml范围内呈良好线性关系,回归方程:Y＝2.5108×105X-5.045×103;平均回收率为98.56%,RSD＝0.86%(n＝5).结论:本法简便、快捷、准确,可作为该制剂的质量控制标准.
酸枣仁本草及功用考证

本文以本草文献资料为依据,论证了<本经>所载"酸枣"即"酸枣仁",且古今药用正品酸枣均为鼠李科酸枣;阐释了古代医家对酸枣仁养心益肝安神、敛阴止汗及配伍宜忌等评述.现代研究成果使酸枣仁的养心安神功效有了科学依据,确是一味首选药,对攻克失眠顽症有广阔的应用和开发前景.
升麻醇葡萄糖苷的结构修订

从升麻地上部分80%乙醇提取物的低极性部分分得7个化合物.根据理化性质和各种波谱技术辅以化学方法鉴定了它们的结构,分别为:升麻醇葡萄糖苷、阿魏酸、异阿魏酸、咖啡酸二甲醚、升麻醇、硬脂酸、β-谷甾醇.其中咖啡酸二甲醚首次从该植物中分得.
张仁针灸治疗难治性眼病经验

张仁主任医师,现任上海市针灸学会理事长.从事针灸临床30多年,在长期的医疗实践中,不断探索现代难治病的针灸治疗方技,尤其对难治性眼病的针灸治疗,形成了一套独特而完整的经验.现将跟师所得,总结如下.……
逆行指动脉皮瓣修复指腹缺损

指腹缺损在临床上有很多修复的方法,但因其部位特殊性,对外观及手指功能的要求较高,其它修复方法往往很难达到理想的效果.2004年1月至今,我们应用指动脉逆行岛状皮瓣修复指腹缺损10例,术后疗效满意,报告如下.……
脊髓栓系综合征350例临床分析

脊髓栓系综合征(tethered cord syndrome,TCS)是由于先天或后天原因牵拉脊髓圆锥,使其处于低位而产生一系列临床症状,如大小便障碍、下肢运动感觉障碍、足部畸形等[1].外科手术是惟一有效的治疗方法.现将作者1992年7月至2001年7月手术治疗的350例TCS总结报道如下.
中、微量元素对大豆产量和品质的影响

2001～2002年在吉林省中部黑土区开展了施用中微量元素对高脂肪和高蛋白大豆产量和品质影响的试验.结果表明,施用硫、镁、硼和钼对高脂肪大豆的增产作用比较明显,增产幅度为9.1%～15.8%;镁和铜对高蛋白大豆有增产趋势.中微量元素硫、镁、铜、锌、硼和锰均能提高高脂肪大豆的脂肪含量,提高幅度为0.21%～0.35%;锌和锰可增加高蛋白大豆的蛋白质含量,增加幅度为0.15%～0.44%.
优质高产大豆栽培技术

针对吉林省的实际情况,优质高产大豆栽培技术要做到以下几点:①种子播前适当处理;②合理轮作及整地;③科学施肥;④适时播种;⑤勤于田间管理;⑥适时收获贮藏.
NUMERICAL SIMULATION OF MORPHOLOGY OF POLYMER CHAIN COILS IN COMPLEX FLOWS

A new coupled finite element formulation is proposed to calculate a conformation tensor model in two complex flows: a planar contraction flow and a planar flow around a symmetrically placed cylinder. The components of conformation tensor are first computed together with the velocity and pressure to describe the change of morphology of polymer chain coils in flow fields. Macroscopic quantities of viscoelastic flow are then calculated based on the conformation tensor. Comparisons between the numerical simulations and experiments for stress patterns and velocity profiles are carried out to prove the validity of the method.
先天性喉咽蹼合并食管狭窄一例

患儿女,4岁.因吞咽困难3年,饮水呛咳4年,于2004年5月18日收入院.患儿自出生后即出现进流质食物易呛咳,不能进食糊状及固体食物,反复发作支气管炎、肺炎.……
土地权利应进一步明确--中国土地学会"物权法网上论坛"意见汇总

为配合全国人大常委会征求对<物权法(草案)>(以下简称<草案>)的意见和建议,中国土地学会于2005年7月18日起在中国土地学会网站(www.zgtdxh.org.com)和国土资源网、中国地产投资网开设"物权法论坛",收集对<草案>土地权利方面的意见和建议,并对有关问题进行了网上调查.……
Experimental Results of IBW Heating on the HT-7 Tokmak

Ion Bernstein waves (IBWs) have been proposed to be useful for heating and improving transport in tokamak plasmas. An Ion Bernstein wave heating experiment using different frequency (27 MHz and 30 MHz) was carried out on HT-7 superconducting tokamak in recent experiments. At a frequency of 30 MHz, ne peaked and Hα dropped have been pervasively observed,τp was improved by a factor of 2～4, and τe increased by a factor of 1～1.5. An obvious confinement of particle was observed during the IBW pulse. At 27MHz, both global and localized electron heating were observed depending on the location of the ion resonant layer by changing Bt.Central electron heating effect was obtained in the global heating mode and electron temperature strongly increased near the 2 ΩD resonant layer for localized heating mode.
20%阿维·杀单微乳剂在水稻上的应用

为了阐明杀虫剂20%阿维·杀单ME对二化螟、稻纵卷叶螟的防治效果及应用前景,进行了水稻田间防效试验.结果表明,每公顷施用20%阿维·杀单ME有效成分270g防治二化螟,施药25d的保苗效果为94.80%,其校正杀虫效果为95.00%;每公顷施用20%阿维·杀单ME有效成分270g防治稻纵卷叶螟,施药25d后的保叶效果为92.83%,施药10d后校正杀虫效果为93.85%,理论产量增长31.3%.
湖北省甘薯科研生产的历史、现状与对策

湖北省甘薯育种虽然在全国有一定地位,但也存在优异原始材料不多,现有材料血缘近、遗传基础狭窄,甘薯育种应用基础研究较薄弱,经费来源少,育种协作力度不大等问题.促进湖北甘薯的发展,应正确认识甘薯的地位,启动适度经费支持;加强甘薯科技队伍的建设,综合提高我省甘薯育种水平和科研能力;建立优良种薯种苗生产基地,完善甘薯新品种推广体系,突出特色专用型新品种的开发.
痤疮系统性治疗的现状与展望

中、重度痤疮需要系统治疗.四环素族和大环内酯类抗生素用于治疗丘疹脓疱性痤疮;对于严重的丘疹脓疱性痤疮和结节囊肿性/聚合性痤疮,需口服异维A酸;性激素可用于治疗女性严重的青春期痤疮或迟发/持久性痤疮;抗雄激素和低剂量皮质类固醇疗法亦用于痤疮的治疗.痤疮新疗法有低剂量异维A酸、新的异维A酸剂型(微粒化)、胰岛素致敏剂、Ⅰ型5α-还原酶抑制剂和反义分子,尤其是开发新的抗炎药物如脂氧合酶抑制剂,已成为痤疮治疗的新趋势.
有机茶生产土壤铺草技术及其应用效果分析

有机茶在其生产过程中,不使用任何人工合成的化肥、农药、生长调节剂和基因工程产品等,被认为是营养最丰富、最安全的食品之一,深受国内外广大消费者欢迎,市场潜力巨大.但如何提高土壤肥力,防治病虫害,并建立相应的生产技术体系是有机茶生产持续健康发展的主要障碍因子.铺草技术在有机茶生产中的应用,有效地改善了土壤环境,增加了土壤肥力,大大提高了茶叶的产量和品质.对土壤铺草技术的应用效果进行了简要的分析.
西瓜生长发育异常的原因及预防措施

介绍了西瓜生产中经常发生的生长发育异常症状特点,分析了形成原因,提出了较为实用的预防措施.西瓜生长发育中的异常现象有:急性萎蔫症,疯长病,自封顶症,叶枯症,变形果,空洞果,裂果,黄带等.
青少年自行车运动员6周专项体能训练前后部分身体机能指标的变化

青少年运动员正值生长发育和运动训练水平提高的关键时期,是否能在此阶段进行科学有效的训练将直接影响其今后的健康及运动成绩的提高.本实验以青少年自行车运动员为对象,观察6周专项体能训练前后其部分生理、生化指标变化.……
A new design of groundwater sampling device and its application

Compounds in the atmosphere contaminate samples of groundwater. An inexpensive and simple method for collecting groundwater samples is developed to prevent contamination when the background concentration of contaminants is high. This new design of groundwater sampling device involves a glass sampling bottle with a Teflon-lined valve at each end. A cleaned and dried sampling bottle was connected to a low flow-rate peristaltic pump with Teflon tubing and was filled with water. No headspace volume was remained in the sampling bottle. The sample bottle was then packed in a PVC bag to prevent the target component from infiltrating into the water sample through the valves. In this study, groundwater was sampled at six wells using both the conventional method and the improved method.The analysis of trichlorofluoromethane(CFC-11 ) concentrations at these six wells indicates that all the groundwater samples obtained by the conventional sampling method were contaminated by CFC-11 from the atmosphere. The improved sampling method greatly eliminated theproblems of contamination, preservation and quantitative analysis of natural water.
Numerical simulation of a combined oxidation ditch flow using 3D k-εturbulence model

The standard three dimensional(3D) k-ε turbulence model was applied to simulate the flow field of a small scale combined oxidation ditch. The moving mesh approach was used to model the rotor of the ditch. Comparison of the computed and the measured data is acceptable. A vertical reverse flow zone in the ditch was found, and it played a very important role in the ditch flow behavior. The flow pattern in the ditch is discussed in detail, and approaches are suggested to improve the hydrodynamic performance in the ditch.
定向西藏的军校医学生实习阶段心理健康调查

相对封闭而又严格管理的军校生活和艰苦紧张的学习任务使部分军校学员的心理压力明显增大.加之,青年学员正处于成人成材的重要时期,心理压力承受能力相对较弱,容易产生各种心理冲突和失衡.因此,军队学员的心理健康问题不容忽视,特别是定向西藏的军医学员,作为一个特殊的群体,其心理健康状况、生活应激能力以及心态,更是应引起大多数人关注.本研究旨在为军队医学院校学员的心理健康教育提供依据.……
韭菜无公害栽培技术

韭菜是人们喜食的一种蔬菜,但是近年来剧毒农药在防治韭菜病虫害中使用较多,使韭菜中的农药残留严重超标,食用韭菜中毒事件时有发生,给人们的健康造成严重危害,因此,生产无公害韭菜成为当务之急.蔬菜研究所百合科育种室根据多年的科研生产试验,总结出综合配套的韭菜无公害栽培技术,现将有关内容介绍如下.……
黄瓜新品种绿园31的选育

绿园31是利用国外雌性系材料作母本,风味品质较好的辽阳地方品种材料作父本配制的一代杂种.该品种长势强,主蔓结瓜为主;商品瓜白绿色,刺瘤稀小,白刺,瓜长约21 cm,商品率高,风味品质好于国外同类产品;全雌型,第1雌花着生在主蔓第3节～5节,早熟,丰产,春大棚栽培平均产量6 000 kg/667m2;耐低温弱光,适宜春季日光温室、春季塑料大棚栽培.
A novel biosorbent: characterization of the spent mushroom compost and its application for removal of heavy metals

The spent mushroom compost of Lentinus edodes was used as a biosorbent for adsorbing cadmium, lead and chromium from solutions under batch conditions for the first time. Titration of the biomass revealed that it contained at least three types of functional groups. The Fourier transform infrared spectrometry showed that the carboxyl, phosphoryl, phenolic groups were the main groups. The simulated values of PKH and molar quantity were 5.00 and 0.44 mmol/g, 7.32 and 1.38 mmol/g, 10.45 and 1.44 mmol/g, respectively.The biosorption ability increased with pH in acid condition. When 10 mg/L biomass dosage was added in, there was no significant increment of metal uptake. The maximum uptake estimated with the Langmiur isotherm model were 833.33 mg/g for Cd( Ⅱ ), 1000.00 mg/g for Pb( Ⅱ ) and 44.44 mg/g for Cr( Ⅲ ), respectively. All the results showed that vast potential sorption capacity was existed in the biomass for adsorbing these three kinds of metals studied.
水稻新品种辽粳28选育技术报告

辽粳28水稻新品种由辽宁省农业科学院稻作研究所育成.从1995年夏在辽粳326生产田中选出大穗变异材料,经1995～2002年8年8个世代的选择、鉴定,完成了各项选育程序.1995年夏从辽粳326中选出变异株;1996年沈阳单本种植株系圃,选出优良单株32株;1997年在沈阳种植株系进行单株选择,筛选出一批整齐株系;1998年夏在沈阳继续种植株系,并对整齐株系进行产量比较试验;1999年继续进行优良品系产量比较试验,编号Lc20品系表现成绩优良;2000年以辽农20名称参加辽宁省水稻品种(系)中晚熟组区域试验,同时进行米质分析及抗稻瘟病力鉴定;2001年辽农20继续进行品种(系)区域试验、米质分析和抗稻瘟病力鉴定;2002年辽农20进行生产实验,同时进行米质分析和抗稻瘟病力鉴定;2003年通过辽宁省农作物品种审定委员会审定,定名辽粳28.……
Persistent organochlorine residues in sediments of Haihe River and Dagu Drainage River in Tianjin, China

Persistent organochlorine compounds were analyzed by means of GC-ECD in surface sediment samples from two selected rivers in Tianjin, Haihe River and Dagu Drainage River. A total of 16 surface sediment sites were selected along the both rivers. The frequency of detection of T-HCH and T-DDT in sediment samples both was up to 100%, which illustrated that the contamination of HCH and DDT was widespread in Haihe and Dagu Drainage Rivers. Results indicated that the concentrations of vadous pesticides in sediments from Haihe River were in the range of 3.30-75.96 ng/g dw for T-HCH and 1.57-211.57 ng/g dw for T-DDT. Compared with Haihe River,Dagu Drainage River was contaminated by HCHs and DDTs along the all locations and the values of T-HCH and T-DDT residues in sediments ranged from 2.30 to 124.61 ng/g dw and from 11.28 to 237.30 ng/g dw, respectively. The possible pollution sources were analyzed through monitoring results of organochlorine pesticides(OCPs) residues in sediments from the two rivers. The investigation also indicated that HCH was still used as pesticide in Tianjin partial area.
Effects of phosphate on the adsorption of glyphosate on three different types of Chinese soils

Glyphosate (GPS) is a non-selective, post-mergence herbicide that is widely used throughout the world. Due to the similar molecular structures of glyphosate and phosphate, adsorption of glyphosate on soil is easily affected by coexisting phosphate, especially when phosphate is applied at a significant rate in farmland. This paper studied the effects of phosphate on the adsorption of glyphosate on three different types of Chinese soils including two variable charge soils and one permanent charge soil. The results indicated that Freundlich equations used to simulate glyphosate adsorption isotherms gave high correlation coefficients(0.990-0.998) with K values of 2751, 2451 and 166 for the zhuanhong soil(ZH soil, Laterite), red soil(RS, Udic Ferrisol) and Wushan paddy soil(WS soil, Anthrosol),respectively. The more the soil iron and aluminum oxides and clay contained, the more glyphosate adsorbed. The presence of phosphate significantly decreased the adsorption of glyphosate to the soils by competing with glyphosate for adsorption sites of soils. Meanwhile, the effects of phosphate on adsorption of glyphosate on the two variable charge soils were more significant than that on the permanent charge soil. When phosphate and glyphosate were added in the soils in different orders, the adsorption quantities of glyphosate on the soils were different, which followed GPS-soil>GPS-P-soil = GPS-soil-P > P-soil-GPS, meaning a complex interaction occurred among glyphosate,phosphate and the soils.
中国固态离子学25年

固态离子学是20世纪70年代以来发展起来的一门新兴学科,开始称为快离子导体,因为这类材料的离子电导率可与熔体相比.快离子导体的基本电性特征是:电导率大于10-4S·m-1(一般离子导体如NaCl的室温导电率在10-17S·m-1数量级),活化能小于0.5 eV.快离子导体的形成有一定的条件,如材料结构中需有一维、二维或三维的离子迁移通道,这些通道应具有适合特定离子迁移的通道尺寸;结构中的缺陷浓度高以至可形成亚晶格无序等.……
我国玻纤增强基材的发展

连续玻璃纤维主要用作塑料增强基材,本文讨论涉及到的增强基材范围包括:各种增强热固性塑料和增强热塑性塑料以及增强电子电器用层压绝缘材料的玻璃纤维基材,不包括玻纤制品直接或经涂覆而使用的基材.……
复方枳芍健胃颗粒的质量控制

目的:建立复方枳芍健胃颗粒的质量控制方法.方法:采用薄层色谱法对枳壳、白芍、蒲公英进行定性鉴别,用HPLC法测定枳壳中柚皮苷的含量.结果:柚皮苷含量在21.12～49.28 mg·L-1范围内线性关系良好(r=0.999 9),平均回收率为99.96%.RSD为1.78%(n=5).结论:制定的质量标准可以保证复方枳芍健胃颗粒的质量.
液化苯酚的临床新应用

目的:研究液化苯酚用于治疗皮肤丝状疣、传染性软疣的临床新应用.方法:将固体苯酚水浴加热制成液化苯酚,点涂皮肤丝状疣、传染性性软疣,bid,连用3 d.结果:治疗效果显著,皮肤丝状疣、传染性软疣治愈率均达95%,对涂药疣体区周围皮肤无不良影响.结论:对治疗丝状疣、传染性软疣具有疗效显著,使用方便,安全经济,不良反应轻微的特点,值得临床推广应用.
一种简易的蛛网膜下腔出血模型的建立

蛛网膜下腔出血(SAH)是临床常见的脑卒中类型,其死亡率高,危害很大.到目前为止,SAH的病理生理机制没有完全研究清楚,对SAH患者的临床研究受到多种因素的限制,因此开展蛛网膜下腔出血的实验研究具有重要意义.……
青少年型前葡萄膜炎42例

1临床资料青少年前葡萄膜炎住院患者42(男23,女19)例,年龄7～16岁,双眼30例,单眼12例,就诊时间3 d～3 mo,急性发病29例,慢性迁徙性13例. 初诊15例,复发27例. 42例均有不同程度视力下降,光感～指数21例,0.04～0.1者15例,≥0.2者6例.……
功能性鼻内镜及其对鼻科学的贡献

回顾耳鼻咽喉科学的发展史,其中鼻内镜外科技术的传播之速、之广以及所涉及的病种之多是令人瞩目的,这与当代的传媒技术和全球化的意识有着重要的关联.
优质高产水稻新品种粤合占的选育

粤合占是广东省农科院水稻研究所以高收获指数、高产品种粤香占作母本,以抗性好、米质优的材料特粳占作父本进行杂交,经系谱选育而成的感温型常规稻品种,具有产量、抗性和米质等方面结合较好的特点,是一个早熟优质的水稻新品种,2005年3月通过广东省农作物品种审定.
系统性硬化症患者视神经萎缩一例

进行性系统性硬化症以往称为硬皮病,是一种全身性结缔组织疾病,眼部常受累,可有不同的临床表现[1],但出现视神经萎缩者罕见.我们曾于2003年收治1例系统性硬化症患者,在病变进展过程中,出现进行性双眼视力下降和视神经萎缩.现报告如下.……
半导体激光治疗放疗和化疗后大面积顽固性口腔溃疡

全身化疗和头颈部放疗后常发生大面积、顽固的口腔黏膜溃疡,剧烈的疼痛严重影响患者的饮食和睡眠,给患者造成非常大的痛苦,同时也影响患者身体的康复,有时甚至使治疗无法进行下去.常规治疗疗效较差,我们应用半导体激光治疗取得较好的疗效.……
激光致视网膜损伤机制和治疗的研究进展

随着激光技术的广泛应用,接触激光的人越来越多,激光意外损伤的事故不断发生.眼睛是激光最敏感的靶器官,也是最易受伤的器官,波长400～900 nm的激光束入射到角膜上,经角膜和晶状体聚焦,使视网膜在单位面积上所受激光照射的能量比相应的角膜入射量提高了近105倍.因此,即使是低剂量的激光照射也可引起视网膜的严重损伤而导致视力下降甚至视觉功能丧失.一旦视网膜损伤,如何寻找快速有效的药物进行治疗、干预、恢复视网膜的功能成了人们关注的主要问题.……
方药配伍对茵陈蒿汤中绿原酸溶出率的影响

茵陈蒿汤源自<伤寒论>,由茵陈、栀子和大黄组成,具有清热、利湿、退黄的功能,为中医治疗湿热黄疸之要方.本实验建立HPLC测定了茵陈蒿汤、茵陈、茵陈与栀子、茵陈与大黄配伍的水煎液中绿原酸的含量,以探讨方药配伍对茵陈蒿汤中绿原酸溶出率的影响,为探讨中医传统方剂配伍变化,探讨中药复方化学成分相互作用的一般规律提供实验依据.……
用典范相关分析研究宁南宽谷丘陵区不同土地利用方式土壤酶活性与肥力因子的关系

土壤酶素有生物催化剂之称[1-2],既参与包括土壤生物化学过程在内的自然界物质循环,又是植物营养元素的活性库[3-4].土壤酶活性与土壤状况的关系历来为各国学者所关注[5-8],应用通径分析研究土壤酶活性与土壤性质的关系也有一些报道[9-10].……