mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Instantaneous Bethe-Salpeter Equation and Its Analog: Breit-like Equation

We take the (μ±e±) system as an example, but restrict ourselves to highlight the states with quantum number JP=0-, to explore the different contents of the instantaneous Bethe-Salpeter (BS) equation and its analog, the relativistic version of Breit equation, by solving them exactly. The results show that the two equations are not equivalent, although they are analogous. Furthermore, since the Breit equation contains extra un-physical solutions, so we point out that it should be abandoned if one wishes to have an accurate description of the bound states for the instantaneous interacting binding systems.
山丹初代培养过程中3种内源激素变化的研究

山丹(Lilium pumilum DC.)别名细叶百合,宜成片种植于疏林下、草坪边,还可盆栽或作切花观赏,是北方难得的绿化、美化材料.本试验探讨了生长素(IAA)、玉米素核苷(ZR)、赤霉素(GA3)的变化与不同部位的鳞片分化之间的关系,为进一步研究山丹的繁殖机理及遗传转化提供了理论依据.
Quasi-periodic and Non-periodic Waves in (2+1)-Dimensional Nonlinear Systems

New exact quasi-periodic and non-periodic solutions for the (2+1)-dimensional nonlinear systems are studied by means of the multi-linear variable separation approach (MLVSA) and the Jacobi elliptic functions with the space-time-dependent modulus. Though the result is valid for all the MLVSA solvable models, it is explicitly shown for the long-wave and short-wave interaction model.
基质金属蛋白酶与组织金属蛋白酶抑制剂在甲状腺癌中的研究进展

甲状腺癌是最常见的一类内分泌恶性肿瘤,根据组织来源分为滤泡细胞癌和滤泡旁细胞癌,不同组织类型的甲状腺癌其恶性程度亦不相同,但都具有癌细胞生长失去可调控性,具备浸润潜能,这些细胞脱离原发灶浸入周围组织,并向远处转移,癌转移是造成临床治疗失败和病人死亡的主要原因,大量研究表明:基质金属蛋白酶(MMP)对肿瘤的侵袭和转移起重要作用[1,2].但在甲状腺癌中,国内外对基质金属蛋白酶(MMP)及基质金属蛋白酶组织抑制剂(TIMP)的研究报道很少,其结果也不完全一致.现就针对MMP和TIMP在甲状腺癌中的表达及其与甲状腺癌侵袭、生长、转移及血管形成关系作一综述.……
屏蔽电泵在隆昌天然气净化厂的应用

以屏蔽电泵在隆昌天然气净化厂的应用过程为研究对象,从屏蔽泵的结构特点、性能实验、使用情况等几个方面,简要介绍了屏蔽电泵的类型,及隆昌天然气净化厂在应用该泵后所产生的经济和环保效益.
文迪雅治疗2型糖尿病的疗效观察

目的观察文迪雅治疗2型糖尿病疗效及副作用.方法入选36例2型糖尿病患者,所有病例均在饮食、运动疗法的基础上给予文迪雅4 mg/qd或8 mg /qd,联合应用其他口服降糖药者均保持原药物剂量不变.疗程12周.分别观察治疗前后空腹及餐后2 h血糖、糖化血红蛋白、空腹及餐后2 h血浆胰岛素、血脂、血常规的变化.结果 (1)治疗前后空腹及餐后2 h血糖、糖化血红蛋白、空腹及餐后2 h血浆胰岛素、血压均明显下降具有显著差异;(2)甘油三脂、总胆固醇、低密度脂蛋白胆固醇轻度下降,高密度脂蛋白胆固醇轻度升高,但无显著差异;(3)治疗前后肝功能、肾功能、尿酸、血常规等均无明显改变.(4)不良反应:其中体重轻度增加(0.4～1.6 kg)7例;Hb含量较治疗前有所下降(但仍在正常范围内)2例;双侧踝关节轻度水肿1例;联合应用磺脲类降糖药物者因未及时减量,发生低血糖反应2次.结论文迪雅可明显降低血糖、糖化血红蛋白和胰岛素水平,降低血压,具有减轻胰岛素抵抗、改善胰岛β细胞功能、全面控制2型糖尿病的作用,且服用方便,一日一次,不受进餐影响,患者依从性好,是一个高效、安全、副作用小的口服降糖药物.
应用种衣剂对大豆根腐病及产量的影响

研究结果表明,应用种衣剂可促进大豆生育,使大豆增产10.8%以上,地下病虫害综合防治效果达56.0%～77.7%,大豆脂肪和蛋白质总含量增加,品质有所改善.
水稻新品种金浪1号选育报告

金浪1号(现代9924)以辽盐2号(S16)为母本,藤系144为父本杂交育成.3年省区域试验平均产量为8092.5kg/hm2,比对照长白9号增产5.97%,生产试验平均产量为9 106.5 kg/hm2,比对照增产6.47%.该品种抗病性较对照略好,耐盐碱,稻米品质优良,10项指标达到部颁优质米一级标准.
"福选9号"茶树名优新品种选育初报

"福选9号"茶树新品种,是从福建引进的福鼎大白茶群体中经单株选择--无性繁殖方法选育而成.该品种具有春季萌芽特早、春茶产量高、适应性强、全年生育期长、适制性强、综合性状优良、尤其适合开发名优早茶的特点,制作的名优茶品质优异,产品附加值高.2002～2004年,在以往研究工作的基础上进行了"福选9号"的品比试验和区域性试验."福选9号"茶树新品种已于2005年2月18日通过重庆市农作物品种审定委员会审定为重庆市茶树新品种.
急危症的糖代谢及胰岛素治疗进展

2型糖尿病(T2DM)通常有肥胖和代谢失调而易伴随心血管疾病(CVD),现一般称之为"代谢综合征".应激状态下,由于反向调节性激素的激活和细胞因子释放,血糖增加超过了胰岛素的调节水平,从而引起高血糖症,此情况在 T2DM尤为显著[1].既往无糖尿病史患者急性应激后可引起血糖水平升高,称之为"应激性高血糖",这可能是由于他们存在一定程度的胰岛素耐受[2].有资料表明[3],胰岛素不仅能控制血糖水平,而且能减弱急危患者的分解代谢水平、抑制炎性细胞因子释放等.由于慢性内源性高胰岛素血症是心血管疾病(CVD)的独立危险因子,急危患者为改善预后而给予高剂量外源性胰岛素治疗看来似乎很矛盾,但积极胰岛素治疗能显著改善应激性高血糖或无糖尿病史的急性心肌梗死(AMI)患者的预后.因此,胰岛素可作为急危患者的常规治疗药物.
力尔凡合并化疗治疗老年人肺癌的临床观察

细菌毒素治疗恶性肿瘤作用引起了人们的重视[1],力尔凡(长春力尔凡药业有限公司,产品批号:040102)是从溶血性链球菌中提取的一种生物调节剂,有抗肿瘤及提高机体免疫功能的疗效[2,3].
Volatile Organic Compounds and Their Roles in Bacteriostasis in Five Conifer Species

In order to make clear the functions of plant volatile organic compounds (VOCs) on bacteriostasis and air decontamination, we analyzed the composition and content of VOCs in Pinus tabulaeformis Carr., P. bungeana Zucc., Sabina chinensis Antoine, Picea koraiensis Nakai, and Cedrus deodara G. Don under near-natural conditions using the thermal-desorption cold trap gas chromatography/mass spectrometer technique. The effects of the VOCs on airborne microorganisms were investigated using the method of natural sedimentation. Results showed that the major VOCs were as follows: limonene, β-pinene, α-pinene,and α-caryophyllene in Pinus tabulaeformis and P. bungeana; limonene, borneol acetate, β-pinene, myrcene,and tricylene in S. chinensis; limonene, α-pinene, myrcene, camphene, and β-pinene in Picea koraiensis;and limonene, 2, (10)-pinene, α-pinene, and myrcene in C. deodara. These VOCs and the corresponding foliar extracts inhibited the growth of bacteria and stimulated the growth of fungi. Experimental data using monomers of the VOCs demonstrated that limonene, β-pinene, and three aldehydes could significantly inhibit bacterial growth, suggesting an inhibitory effect of VOCs on the growth of airborne microorganisms in the five conifer species. The bacteriostasis and air-decontaminating effects of plant VOCs are further discussed in terms of their chemical composition.
Dimethyl Sulfoxide Is Feasible for Plant Tubulin Assembly In vitro: A Comprehensive Analysis

It is much more difficult for tubulin from plant sources to polymerize in vitro than tubulin from animal sources. Taxol, a most widely used reagent in microtubule studies, enhances plant microtubule assembly, but hinders microtubule dynamics. Dimethyl sulfoxide (DMSO), a widely used reagent in animal microtubule studies, is a good candidate for the investigation of plant microtubule assembly in vitro.However, proper investigation is lacking about the effects of DMSO on plant microtubule assembly in vitro.In the present study, DMSO was used to establish optimal conditions for the polymerization of plant tubulin. Tubulin, purified from lily pollen, polymerizes into microtubules at a critical concentration of 1.2mg/mL in the presence of 10% DMSO. The polymers appear to have a normal microtubule structure, as revealed by electron microscopy. In the presence of 10% DMSO, microtubule polymerization decreases when the pH of the medium is increased from 6.5 to 7.4. Both the polymerization rate and the mass of the polymers increase as temperature increases from 25 to 40 ℃. Tubulin polymerizes and depolymerizes along with cycling of temperature, from 37 to 4 ℃, or following the addition to or the removal of Ca2+ from the medium. When incubated with nuclei isolated from tobacco BY-2 suspension cells, tubulin assembles onto the nuclear surface in the presence of 10% DMSO. Labeling lily pollen tubulin with 5- (and 6-)carboxytetramethyl-rhodamine succinimidyl ester (NHS-rhodamine) was performed successfully in the presence of 10% DMSO. Labeled tubulin assembles into a radial structure on the surface of BY-2 nuclei. The polymerization of lily pollen tubulin is also enhanced by microtubule-associated proteins from animal sources in the presence of 10% DMSO. All the experimental results indicate that plant tubulin functions normally in the presence of DMSO. Therefore, DMSO is an appropriate reagent for plant tubulin polymerization and investigation of plant microtubules in vitro.
Soil Organic Matter Dynamics Along a Vertical Vegetation Gradient in the Gongga Mountain on the Tibetan Plateau

Our knowledge about soil organic matter (SOM) dynamics is limited although this is an important issue in the study of responses of ecosystems to global climate changes. Twelve sampling plots were set up every 200 m from 1 700 to 3 900 m along the vertical vegetation gradient along the east slope of Gongga Mountain. Samples were taken from all 12 plots for SOM content measurement, although only 5 of the 12plots were subjected to radiocarbon measurements. A radiocarbon isotope method and a time-dependent model were used to quantify the SOM dynamics and SOM turnover rates along the vertical vegetation gradient. The results showed that the SOM turnover rate decreased and turnover time increased with soil depth for all vegetation types. The litter layer turnover rates presented a clear trend along the gradient. The litter layer turnover rates decreased with an increase in elevation, except that the litter layer turnover rate of mixed forest was higher than that of evergreen forest. Climatic factors, such as temperature and precipitation,were the main factors influencing the surface soil carbon dynamics. The turnover rates of the subsoil (including the A, B, and C horizons in the soil profiles) along the vertical gradient had no clear trends. The SOM of subalpine shrub and meadow turned over more slowly than that of the forest types in almost all soil horizons. The characteristic of short roots distributing in the upper part of the soil profile leads to different SOM dynamics of shrub and meadow compared with the forest types. Coniferous and mixed forests were susceptible to carbon loss from the young carbon pool, but their long and big roots resulted in high △14C values of the deep soil profiles and increased the input of young carbon to the deep soil. In evergreen forest,the carbon cumulative ability from the B horizon to the C horizon was weak. The different vegetation types,together with their different modes of nutrient and carbon intake, may be the mechanism conditioning the subsoil organic matter dynamics.
节水灌溉漫谈

农业灌溉是用水大户,在我国水资源严重短缺的情况下,保证农业生产、保证社会经济可持续发展的唯一出路,是大力推广节水灌溉.节水灌溉是我国农业发展,也是我国经济发展的一项革命性措施.
丰顺县甜玉米产业化发展现状及对策

概述了丰顺县甜玉米产业化取得的成效,分析了产业化进程中存在的、亟待解决的育种、深加工、流通及市场建设、产品质量等一系列问题,针对该县的实际,提出了促进甜玉米产业化的发展对策.
大埔烤烟实行规模化生产、集约化经营的对策措施

介绍了大埔县优质烟基地实行规模化生产、集约化经营的现状,阐述了烤烟规模化生产、集约化经营的优点,并总结出相关的对策措施:一是狠抓优化生产布局、制订优惠政策和帮扶奖励办法两个关键工作;二是认真落实"五个到位",即集约化种烟选址工作到位、集约户确定工作到位、集约化育苗工作到位、规范技术实施工作到位和服务指导工作到位;三是解决"六个难题",即解决土地租赁问题、劳动力调配问题、资金问题、烤房配套问题、作物争地问题和风险保障问题.
超甜玉米新品种粤甜9号的选育及栽培技术

粤甜9号是广东省农科院作物研究所利用优质高产超甜玉米单交种粤甜3号作母本,以自育的优质迟熟材料YT034为父本杂交组配育成的三交种.该品种具有品质优、产量高、综合抗性较好等优点,2003～2004年参加国家东南区鲜食甜玉米区试, 每667 m2产量860.90 kg,比对照种增产10.7%,品质综合评分达88.1分, 主要表现感官品质好、色泽一致、甜度高、气味和柔韧性好、风味好、皮薄.各地生产示范结果表明, 粤甜9号一般每667 m2鲜苞产量900～1 000 kg,高产田块达1 200 kg以上.
HBsAg阴性、HBeAg阳性乙型肝炎病毒血清学表现模式的分析

乙型肝炎病毒(HBV)感染血清标志物的检测已形成了较完善的血清学表现模式,但近年来在日常检测工作中,可见一些特殊模式的实验结果,在检测了18 260例HBV感染血清标志物的标本中,出现95例HBV表面抗原(HBsAg)阴性、HBV e抗原(HBeAg)阳性的血清学表现模式,现报告其结果并对其原因作一分析.……
洞察学科发展方向,不断引领技术创新

值此《石油地球物理勘探》创刊40年之际,我谨代表《石油物探》编辑部向贵刊表示衷心的祝贺,向40年来为该刊编辑出版付出辛勤劳动的一代又一代编辑部同行表示诚挚的敬意。
咽部原发性粒细胞肉瘤1例报道

粒细胞肉瘤(granulocytic sarcoma,GS)是发生于髓外的、由粒细胞系不成熟前体细胞构成的实体肿瘤,外周血和骨髓均无白血病表现的所谓孤立性粒细胞肉瘤非常少见,在非淋巴细胞白血病中的发生率约为9%～10%.GS多出现于白血病病程中,也可在治疗缓解后,也可先于白血病数月或数年发生,但几乎所有粒细胞肉瘤患者最终会有骨髓的受累.也有报道,GS患者未进展成急性髓性白血病的病程最长为16年.原发于咽部的粒细胞肉瘤罕见,本文报道1例我院收治的粒细胞肉瘤病例并作文献复习. ……
HIV初筛实验室室内质控浅析

2004年版<全国艾滋病检测技术规范>要求ELISA实验方法检测抗-HIV必须同时包括内部对照质控血清和外部对照质控血清,同时要求建立并应用质控图.现将本院建立质控情况分析报告如下.……
Ф Electro-production in Pomeron Exchange Model

Based on the Pomeron exchange model, elastic production of Ф meson in electron-proton interaction is investigated with both linear and non-linear Pomeron trajectories. The numerical calculations of the differential cross section for e+p→e'+p+Ф are performed. The theoretical predictions show that the dependence of the differential cross section on virtual photon virtuality, Q2, is of moderation, the change of the energy scale parameter s0 causes moderate effect on the differential cross section, and the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory, in particular, at small momentum transfer region |t|≤0.2 GeV2.
肠内免疫营养对烫伤大鼠血清内毒素/脂多糖肿瘤坏死因子α及其mRNA和肝脏CD14 mRNA表达的影响

疾病条件下,特殊营养物质能防治营养缺乏,刺激免疫细胞增强应答功能,维护肠黏膜屏障功能等[1].本研究观察肠内免疫营养剂Stresson对烫伤大鼠血清内毒素/脂多糖(LPS)、肿瘤坏死因子(TNF)α及其mRNA、肝组织CD14 mRNA表达的影响,并探讨其作用机制.
精氨酸在烧伤免疫营养治疗中的作用

精氨酸是一种含有两个碱性基团及氨基和胍基的氨基酸.正常成人体内有足够的精氨酸,可满足机体需要,但在人体发育不成熟和严重应激状态下,虽然体内能合成精氨酸,但其量不足,在这种情况下机体不能维持正氮平衡和正常的生理功能,需要从体外获得精氨酸.由此可见,精氨酸是人体的一种条件必需氨基酸.随着研究的深入,人们认识到精氨酸具有多种独特的生理和药理作用,它除了能影响分解代谢外,还在保护正常胃肠黏膜屏障、减轻缺血再灌注损伤等方面具有卓效.近年来,精氨酸因在临床免疫营养治疗中的作用日益凸现而倍受重视[1].
正电胶泥浆体系的性能研究

试验研究了常用的降失水剂LV-CMC、DFD与正电胶复合作用的效果以及pH值对正电胶泥浆性能的影响.试验结果表明,样品的加量为0.5%时泥浆的各项流变性能指标较好,抑制性也最好,但是抗盐性能却不佳.pH值在10～11范围内时,泥浆的性能最好,降失水剂对泥浆的流变性能影响很大,同时降失水作用也相当明显.通过试验最终确定最佳正电胶泥浆体系为:3.0%(土般)土+0.5%正电胶+2.5%DFD+0.1%LV-CMC+1.0%KCl.
建南地区低孔低渗储集层改造技术应用效果分析

对建南地区主要产气层飞三段的储集层特征进行了描述,在统计飞三段储集层酸化资料的基础上,对完井酸化规模与酸化效果、不同完井酸化方式与酸化效果及不同改造措施的效果进行了评价.提出了建南地区飞三段储集层改造措施的最佳方案.
江汉油田老区水平井开发认识

水平井开发是油田开发中后期挖潜的重要手段,通过对不同油藏类型的剩余油的认识,分析了影响水平井开发状况的因素,综合分析认为水平井开发状况的好坏,主要与油藏类型、地层压力状况、钻井轨迹、井筒管理等方面有很大的关系.
PRD钻井液体系破胶效果室内研究

对新型快速弱凝胶钻井液体系PRD的破胶效果进行了室内试验研究,采用双重破胶体系(氧化剂-隐形酸)对PRD体系进行破胶.结果表明,在温度低于80℃时,在双重破胶液体系中加入一种助破胶剂,在24h内即可破胶;而在80℃以上,6h即可破胶.
八面河地区构造特征

八面河基底断裂具有走滑位移属性,左行列式盖层正断层组及其他伴生构造构成了完整走滑构成系统;主干走滑位移带形成于中生代燕山期,主要活动期为晚侏罗世至下第三系;伴生构造有一系列的近北东东、东西向延伸,左阶斜列式的正断层和褶皱或挤压构造;可划分成八面河鼻状断裂构造带、广北断裂构造带、海滩鼻状断裂构造带及南部斜坡带4个次生构造带.
用XML DiffGram对SQL数据库操作的方法

本文主要利用XML DiffGram,通过HTTp实现对SQL数据库表的删除、插入和更新等操作.与一般操作数据库方法不同,该方法直接使用XML文件对SQL Server 2000的数据进行操作.在SQLXML 3.0支持下,该法是XML文件直接操作数据库的新方法.
Expression of Brassica napus L. γ-Glutamylcysteine Synthetase and Low-and High-Affinity Sulfate Transporters in Response to Excess Cadmium

In both the roots and leaves ofBrassica napus L. cv. Youyan No. 8 under treatment with 30 μmol/L Cd, massive production of non-protein thiols (NPT; mainly containing glutathione (GSH) and phytochelatins (PCs)) was induced, together with an increase in γ-glutamylcysteine synthetase (γ-ECS)mRNA transcripts. Because γ-ECS is the key enzyme catalyzing the first step in GSH biosynthesis, which, in turn, is converted to PCs, the Cd-induced increase in γ-ECS expression may be responsible for the observed increase in the production of NPT. Using a quantitative reverse transcription polymerase chain reaction (RT-PCR) approach, the expression of genes encoding a putative low-affinity sulfate transporter (LAST) and a putative high-affinity sulfate transporter (HAST) was determined at the transcriptional level. The RT-PCR analysis of relative transcript amounts indicates that the LAST gene in B. napus leaves showed a constitutive expression, which was hardly affected by Cd treatment. However, treatment with 30 μmol/L Cd for 2 or 3 d induced a marked increase in the expression of LAST in roots. Transcriptional expression of the HAST gene occurred in roots, but not in leaves. The expression of HAST only in the roots suggests that it has a specific function in sulfate uptake from soil and that the putative LAST may be responsible for the transport of sulfate from the roots to the shoots, as well as for the uptake of sulfate from soil. These results indicate that changes in transcriptional expression for sulfate transporters were required for the increased demand for sulfate during Cd stress.
Cloning, Physical Mapping and Expression Analysis of a Wheat Mlo-like Gene

Reverse transcription-polymerase chain reaction (RT-PCR) was performed to isolate a cDNA clone using specific primers designed based on the barley (Hordeum vulgare L.) Mlo gene cDNA sequence.A full-length cDNA encoding an Mlo-like protein was isolated and characterized in a Triticum aestivum L.-Haynaldia villosa L. 6VS/6AL translocation line. The putative protein consists of 534 amino acid residues,which contain a nuclear localization motif (NLS), nine casein kinase Ⅱ motifs (S/T-X-X-D/E) and seven protein kinase C motifs (S/T-X-R/K). It is highly homologous to other plant Mlo proteins. Thus, this clone was designated as Ta-Mlo (GenBank accession No. AF384144). Northern blotting analysis showed that the transcription of Ta-Mlo was enhanced slightly by Blumeria graminis (DC) EO Speer f. sp. tritici. Western blotting analysis showed that the protein expression product of the Ta-Mlo gene in wheat seedling leaves is a membrane-bound protein. The protein could be induced by B. graminis. Southern blotting analysis indicated that there is one copy of the Ta-Mlo gene in each wheat genome. Ta-Mlo was localized on specific chromosomal regions of 2AL, 2BL, and 2DL in wheat.
Immunolocalization of Arabinogalactan Proteins and Pectins in Floral Buds of Cucumber (Cucumis sativus L.) During Sex Determination

Arabinogalactan proteins (AGPs) and pectins were detected in the floral buds of cucumber (Cucumis sativus L.) during its sex determination using the following monoclonal antibodies: MAC 207 (recognizes AGP epitopes); JIM 8 (recognizes a subset ofAGP epitopes); and JIM 5 and JIM 7 (epitopes of pectins esterified to various degrees). In the stem apex meristem (SAM) of the cucumber, epitopes of MAC 207, JIM 7, and JIM 5 were localized in the cells from second to third peripheral layers when the sex organ primodium began to differentiate; epitopes of MAC 207 and JIM 5 were also detected in the ragged edge cells. A very dense labeling signal with MAC 207 was observed in the carpel and pistil primodium. The AGP epitopes recognized by JIM 8 were localized in the anther of the male flower and the anther-like portion of the stagnant stamen of the female flower. This suggests that the AGPs and pectins in the SAM of the cucumber are closely associated with the differentiation of the SAM, from meristematic cells to floral primodium. The subset of AGPs recognized by JIM 8 may play an important role in stamen formation.
采油厂机构设置改革初探

析了采油厂机构设置存在的问题,提出采油厂机构改革的原则及其设计模式是:队、矿合一成立管理区;撤消三级单位,以采油队作业区为管理实体进行管理.认为采油厂机构改革更加有助于专业化、标准化、规范化管理,可充分发挥专业技术人员作用,强化技术管理.
龙门山-米苍山前缘二叠系碳酸盐缓坡沉积

通过岩石学特征、沉积构造、生物化石等沉积相标志研究认为,在龙门山-米苍山前缘二叠系主要分布有内缓坡相、浅缓坡相、深缓坡相和盆地相等4种沉积相带,自下而上可分为2次大的海侵-海退沉积旋回;在沉积相演化分析基础上,总结出该区沉积模式,并对有利储层的纵向分布进行了分析,认为深缓坡相带是研究区内最有利的储集相带,集中在中二叠统的茅口组和栖霞组.
普光气田下三叠统飞仙关组储层特征

普光气田下三叠统飞仙关组储层岩性以白云岩为主,鲕粒和残余鲕粒白云岩是最重要的两种储层岩石类型;储层物性以中孔中渗、高孔高渗储层为主,储集性较好,非均质性较强;储集空间以溶蚀孔(洞)占绝对优势,占总孔隙的80%以上;储层的发育受到沉积相带及成岩后生作用的控制,成岩变化中的多期溶蚀作用是储层发育的关键因素,深部热液溶蚀作用在飞仙关组储层的形成过程中起了重要的建设性作用.综合评价表明,储层以Ⅱ类储层为主,占总储层段厚度的41%.
秭归县贾家店地区侏罗系沉积特征

秭归县贾家店地区侏罗系为河流-湖泊沉积体系的沉积,可分为曲流河相、三角洲相和湖泊相3种类型.曲流河相沉积主要发育于下侏罗统香溪组、中侏罗统下沙溪庙组和上沙溪庙组,可识别出河床滞留沉积、边滩、天然堤、河漫滩、河漫沼泽5种沉积微相;三角洲相主要发育前缘亚相,分布于上侏罗统遂宁组、蓬莱镇组以及中侏罗统陈家湾组中上部,可识别出水下分流河道、支流间湾、河口砂坝、远砂坝4种沉积微相;湖泊相主要发育于中侏罗统泄滩组和陈家湾组下部,可识别出浅湖泥、浅湖砂坝、滨湖泥、滨湖砂坝、介屑滩5种沉积微相.在沉积相分析基础上,对研究区沉积环境的演化进行了分析.
番禺低隆起东区中新世早-中期沉积演化特征

番禺低隆起位于珠江口盆地的中央隆起带上,研究认为其沉积环境主要为三角洲相和滨岸相两种沉积体系.从层序地层学入手,将研究层段分为4个3级层序(Ⅲ1,Ⅲ2,Ⅲ3和Ⅲ4),其中Ⅲ1层序包含一个海进体系域和一个高位体系域,详细分析了各个时期的沉积形成过程.按照这个地区3级层序的演化模式,21～15.5Ma时期整体上是一个海进,形成海进型三角洲;15.5～13.8Ma时期形成的是海退型三角洲,并分析了各自形成的原因.
Intergeneric Somatic Hybridization Between Brassica napus L. and Sinapis alba L.

Electrically induced protoplast fusion was used to produce somatic hybrids between Brassica napus L. and Sinapis alba L. Seven hybrids were obtained and verified by the simple sequence repeat and cleaved amplified polymorphic sequence analysis of the gene fael, indicating that the characteristic bands from S. alba were present in the hybrids. The hybridity was also confirmed by chromosome number counting because the hybrids possessed 62 chromosomes, corresponding to the sum of fusion-parent chromosomes. Chromosome pairing at meiosis was predominantly normal, which led to high pollen fertility, ranging from 66% to 77%. All hybrids were grown to full maturity and could be fertilized and set seed after self-pollination or back-crosses with B. napus. The morphology of the hybrids resembled characteristics from both parental species. An analysis of the fatty acid composition in the seeds of F1 plants was conducted and the seeds were found to contain different amounts of erucic acid, ranging from 11.0% to 52.1%.
Characterization of the Rice Floral Organ Number Mutant fon3

A spontaneous rice mutant named floral organ number 3 (fon3) had major mutations in floral organ numbers. Genetic analysis indicated that fon3 acted as a single recessive gene. Microscopic observation showed that the number of floral organs in fon3 increased centripetally. For example, the number of pistils was the more frequently increased than organs in the outer whorls. Homeotic conversion of lodicules and glumes into palea/lemma-like organs was observed in some flowers. Scanning electron microscopy observation showed that the size of flower meristems was maintained the same or similar until the lemma primordium started to differentiate, at which time the floral meristem became enlarged, suggesting abnormal development of the inner whorls of rice florets. The relationship of fon3 with other similar rice mutants is discussed.
Cis- and Trans-Cinnamic Acids Have Different Effects on the Catalytic Properties of Arabidopsis Phenylalanine Ammonia Lyases PAL1, PAL2, and PAL4

Cis-cinnamic acid (CA) is a naturally occurring compound, presumably converted from trans-CA in higher plants. To investigate the effect of cis-CA on the activity of Arabidopsis phenylalanine ammonia lyase (PAL), AtPAL1, AtPAL2, and AtPAL4 genes were isolated using reverse transcription poly-merase chain reaction. These genes were fused to a glutathione S-transferase gene and overexpressed in a heterologous prokaryotic system of Escherichia coli. The purified PAL1, PAL2 and PAL4 enzymes were characterized biochemically to determine the effects of cis-CA on the kinetic parameter Km. The results showed that cis-CA is a competitive inhibitor for PAL1, but not PAL2 and PAL4, whereas trans-CA acts as a competitive inhibitor for all three PAL isomers, suggesting that cis- and trans-CA have different effects on the catalytic activity of PAL.
江淮丘陵地区玉米农业保水(抗旱)剂应用研究

通过几种农业保水(抗旱)剂对江淮丘陵地区玉米的节水及提高肥料利用率进行田间应用研究.结果表明,施用土壤保水剂(苗乐宝)、抗旱保水剂(旱地龙)玉米增产7.6%、6.4%;氮吸收量提高7.6%、5.1%;磷吸收量提高13.2%、8.7%.节水效果显著.
首发精神分裂症记忆损害的相关因素分析

研究表明,约占一半左右的精神分裂症患者存在记忆功能损害,严重影响了他们的生活和社会功能[1].有关精神分裂症记忆损害的影响因素尚未形成共识,我们对首发精神分裂症患者进行了分析,现报告如下.……
细颗粒物(PM2.5)对呼吸系统的毒性作用

颗粒物是城市主要的大气污染物,其粒径大小、形态以及组成成分都与人体健康密切相关,其中空气动力学直径≤2.5μm的细颗粒物(PM2.5)与人体健康关系最密切.有研究表明,大气中PM25每升高10μg/m3,人群呼吸系统疾病的死亡率则从2.1%增加到3.75%[1].PM25的危害一方面是其沉积在肺泡中的刺激作用,另一方面是它的载体作用,吸附大量有毒物质.随着交通发展,车辆保有量的增加,PM25污染越来越重,已经引起了各方面的广泛关注.
学习与记忆--脑与行为研究的前沿

学习与记忆是大脑主要的高级神经功能活动过程.传统的实验心理学认为,学习是指获得经验,记忆则指经验的印记、认知与回记.学习过程是神经系统有关部位暂时联系的建立,记忆是其痕迹的保持与恢复.近代生理心理学则进一步认为,学习是指经验信息(行为习惯、感知、思维)的获得或发展,记忆是经验信息的储存和提取(再现),学习与记忆是两个不同又密切相关的神经活动过程.近十几年,学习记忆认知神经科学的研究成为脑科学、心理学和精神病学研究的热点.学习记忆研究广泛采用认知心理学、分子生物学和其他神经科学的各种方法,对人类"脑与行为"这一重大问题展开深入的、以问题为中心的研究,并取得了丰硕的成果.实验心理学和行为心理学也是长期致力于各种心理活动的研究和观察,从对人类行为和复杂心理学活动的内视(introspection)研究,转向定量化地对一些可以观察的心理和行为进行研究,如对知觉、记忆、复杂问题解决能力,甚至意识本身进行研究,比如将复杂的行为和心理功能分解为不同的认知亚成分(模块,modularity),极大地推动了心理学的发展.现人们已可以对感觉、运动的表象等内在的心理活动进行直接的实验研究,加深了对各种认知和心理内在活动的理解;行为学的实验建立了各种心理行为的认知模型,加速了学习记忆的研究,揭开了大脑工作机制研究的新开端.
基于智能卡的身份认证及其应用

本文总结了当前常用的身份认证方式,并且评价了其优缺点.这些身份认证方式大多数都是在线认证方式.借鉴当前电话卡(智能卡)的一种离线认证的方式,提出了电子商务应用中的离线认证模型.然后,根据电子商务的支付方式,设计出一种基于智能卡的离线认证和安全通信的电子商务应用系统,并且分析了该系统的安全性.
茶多酚对产脲酶真菌细胞生长及膜透性的影响

报道了茶多酚抑制土壤真菌Trichodermasp产脲酶、Trichodermasp生长及膜透性情况.在试验浓度范围里,茶多酚对Trichodermasp产脲酶、Trichodermasp生长及膜透性的作用均随茶多酚浓度增加而加强.茶多酚抑制土壤脲酶活性一方面是作用于酶使其失活,另一方面通过抑制产脲酶菌的生长和影响其代谢.
三江平原土地耕作对土壤氮矿化势和硝化势的影响

研究了三江平原土地耕作对土壤矿化势和硝化势的影响.研究表明,随着耕作年限的增加,土壤氮矿化势在降低,耕作3年土壤为23.020±1.562mgkg-1,7、15、25年分别为22.649±2.597mgkg-1,22.856±3.594mgkg-1,17.315±0.256mgkg-1;而弃耕后,土壤矿化势增加,土壤的矿化势与土壤活性有机质含量呈正相关(r=0.95).硝化势的变化正相反,耕作3、7、15、25年土壤硝化势分别为0.055±0.005mgkg-1d-1,0.083±0.001mgkg-1d-1,0.101±0.025mgkg-1d-1和0.086±0.015mgkg-1d-1,在耕作土壤中pH值是影响硝化的主要因素.一般说来,随着耕作年限增加,土壤的供氮能力在降低,氮的可利用性下降;相反,弃耕能提高土壤的供氮能力,增加土壤氮的可利用性.
A Study on the EM Leakage Arising from Braided Shielding Cable

To investigate the electromagnetic leakage caused by braided shielding cable, the finite-difference formulation of braided shielding cable for both the inner shield-conductor circuit and outer shield-ground circuit are proposed. Then, the current in shield-ground circuit induced by the transmitting signal in the cable is computed in time-domain, and the shielding effectiveness of braided shield against trapezoid signals is studied. Further more, the video EM leakage in far zone is calculated. At last, the information leakage caused by EM radiation of braided cable is intercepted and recovered using the simulation platform. It is proved that EM radiation of braided cable can give rise to information leakage. It is a key factor that should be concerned in the information secure field.
Fluo-3荧光微量法测定人红细胞胞浆内游离钙离子浓度

近年来研究表明,高血压病患者血管平滑肌功能异常主要与钙代谢有关,其中细胞内钙离子(Ca2+)浓度增加是导致血压升高的主要原因[1].血小板内游离钙测定已有较多报道[2],在血小板的分离过程中易激活胞内花生四烯酸代谢,形成血栓烷A2等物质,可促进血小板致密小管中储存钙的释放.而测定红细胞(RBC)中游离钙,可较好地避免人为因素的影响.RBC胞浆钙(RBCsCa2+)测定方法有原子吸收光度法测定总钙量[3],放射同位素45Ca2+示踪法[1],但操作繁锁,受条件限制.近来荧光钙结合探针Fluo-3的出现,可直接测定RBC内Ca2+浓度.避免血红蛋白干扰,该法特异性好、微量、准确、无放射性污染,便于临床样品常规检测。
毛细管气相色谱法检查参麦注射液中残留乙醇和乙酸乙酯限量

为了对中药制剂参麦注射液中乙醇与乙酸乙酯的残留量进行检查,实验以DB-1毛细石英柱(30m×320μm×0.25μm)为色谱柱,柱温100℃;丙酮为内标;N2为载气;FID检测,建立了参麦注射液中乙醇与乙酸乙酯的残留限量的毛细管气相色谱检查法.检验结果显示乙醇、乙酸乙酯及内标物丙酮分离度良好,乙醇和乙酸乙酯的检测限分别为2.5和1μg/mL.可见此方法灵敏、专属性强.可应用于限量检查参麦注射液中乙醇与乙酸乙酯的残留量。
制氢站监控人员可靠性的实验研究

运用模拟实验,考察了制氢站监控人员的可靠性与个人操作经验及事故检测任务难度的关系.结果发现:①监控人员的可靠性因任务难度不同而有显著变化,随着任务难度的加大,正确检测仿真事故的反应时间随之上升;②操作经验对监控人员的可靠性也有直接影响,但影响程度则与任务难度有关;当任务难度降低时,经验所起的作用相应地减弱.