mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
波尔山羊与麻城黑山羊杂交一代肉用性能分析

对麻城黑山羊与波麻一代(F_1)山羊从初生至18月龄的体重变化、12月龄屠宰性能以及羊肉品质进行了对比分析.结果表明:波麻F_1代公、母羊在初生、3月龄、6月龄体重均高于麻城黑山羊(P<0.05),12月龄和18月龄波麻F_1代公羊体重分别比麻城黑山羊公羊净增7.18 kg和12.89 kg,母羊净增6.51 kg和11.37 kg,差异极显著(P<0.01);各阶段平均日增重除初生至3月龄波麻F_1代比麻城黑山羊公、母羊高10.22 g和10.44 g(P<0.05)外,其余各阶段均高出19.00 g以上,差异极显著(P<0.01);屠宰率和胴体净肉率分别比麻城黑山羊公羊高3.35%和6.61%,比母羊高3.31%和5.22%,差异显著(P<0.05);肌肉物理性状差异不大,基本保持了麻城黑山羊原有的风味.波尔山羊与麻城黑山羊杂交效果显著.
柴胡多糖对~(60)Co-γ射线辐照小鼠的辐射防护作用

为了了解柴胡多糖对小鼠辐射损伤的防护作用,用~(60)Co-γ射线以8.2 Gy照射60只小鼠(雌雄各半),其中30只在辐照前12 h腹腔注射柴胡多糖200 mG/kg(辐照给糖组),另30只在辐照前12 h注射生理盐水(辐照对照组),另取30只不进行照射(环境对照组).比较3组小鼠的体重变化、存活率,外周血白细胞(WBC)、红细胞(RBc)及血小板(PLT),脏器指数等数值差异,均显示柴胡多糖对~(60)Co-γ射线辐射小鼠造成的损伤有保护作用,表明柴胡多糖是一种比较好的辐射防护剂.
肌肉生长抑制素基因的研究进展及在动物遗传育种中的应用前景

从肌肉生长抑制素(myostatin,MSTN)基因的发现及命名、生物学功能、组织表达、作用机制、多态性等方面对其研究进展进行了综述,并讨论了MSTN基因在动物遗传育种方面的应用前景.
温室冬草莓立柱式无土栽培技术研究

通过2年的栽培和品比试验,确定了温室冬草莓立柱式、高架位自动滴灌,用泥炭、废棉籽壳、珍珠岩作混合基质的立体化无土栽培模式.栽培密度达48株/m~2,产值达60万元/hm~2.初步筛选出适合温室冬草莓立体化栽培的优质、高产品种;并对冬草莓立体化栽培技术进行了探讨.
共轭亚油酸对樱桃谷鸭生长性能和肌肉品质的影响

研究共轭亚油酸(conjugated linoleic acid,CLA)对樱桃谷鸭生长性能和肌肉品质的影响.结果表明,低添加量CLA能增加樱桃谷鸭的体重,降低其料重比,但当添加量达到2.0%和3.5%时,樱桃谷鸭采食量和体重显著降低(P<0.05);随着CLA添加量的增加,樱桃谷鸭胸肌率和腿肌率也逐渐增加,但当添加量达到3.5%时,胸肌率显著下降(P<0.05).对樱桃谷鸭的肌肉品质而言,饲料中添加CLA降低了肌内脂肪含量,并减少了肌肉的滴水损失,但同时肌肉的嫩度也有所降低,另一方面CLA的添加延缓了肌肉氧化,增加了色泽稳定性.
海盐胁迫对海滨雀稗植株形态与生长的影响

分别以0、6.8、13.6、20.4、27.2、34.0g/L海盐同1/2 Hoagland营养液混配,用作不同含盐量灌溉处理,研究海盐胁迫对海滨雀稗植株形态与生长的影响.结果表明,随着海盐处理浓度提高,海滨雀稗叶宽变窄,直立茎和匍匐茎变细,海盐质量浓度高于6.8g/L,海滨雀稗生长明显受到抑制,根、茎和叶干物重显著降低;海盐质量浓度为27.2g/L和34 g/L时,无匍匐茎生出,海盐质量浓度在0～20.4g/L范围内匍匐茎节间长度无显著变化;叶宽、直立茎茎粗、匍匐茎茎粗和根、茎、叶干重均与海盐处理液电导率值呈极显著负相关.
4种槭属植物耐盐性差异的研究

以4个槭属植物为试验材料,测定了不同浓度的盐胁迫下槭树的相对生长量、盐害指数和盐害率.结果表明:4种槭属植物耐盐性差异性较大,其耐盐性强弱顺序为红花槭<秀丽槭<鸡爪槭<茶条槭.
不同灌溉方式对宁夏枸杞果实主要品质的影响

采用大水漫灌、不灌水和隔沟交替灌溉3种灌溉方式对宁夏枸杞进行灌水处理,对枸杞果实百粒鲜重,主要药效成分枸杞多糖、枸杞总糖、甜菜碱、β-胡萝卜素含量进行测定.结果表明,与大水漫灌相比,采用隔沟交替灌溉在灌水量减少的前提下,宁夏枸杞果实百粒鲜重与漫灌相比差异不显著;而不灌水条件下,果实百粒重明显降低,仅为漫灌条件下的51%.不同灌水条件下,枸杞果实主要有效成分方面有一定差异,表现为枸杞多糖以大水漫灌和隔沟交替灌溉条件下的枸杞果实为高,而不灌水条件下的含量最低,仅为3.98%;枸杞总糖的变化趋势与多糖相似,但隔沟交替灌溉条件下的枸杞总糖明显高于大水漫灌条件下的,说明适度的水分亏缺可以提高果实糖分的积累;甜菜碱含量以不灌水条件下的最高,其次为隔沟交替灌溉,含量最低的为大水漫灌;β-胡萝卜素含量的变化基本与枸杞多糖的变化趋势一致.总体来看,实行隔沟交替灌溉在节约水资源的同时,还可以提高枸杞果实的产量和品质,是一种经济高效的灌水方式.
用celB基因检测慢生型花生根瘤菌接种的效果

采用大肠杆菌和根瘤菌接合的方法,将celB标记基因分别导入2株慢生型花生根瘤菌Spr2-8和Spr4-7中,检测结果表明,celB基因在Spr2-8和Spr4-7中均可以有效表达.通过盆栽试验研究了标记菌与土著菌的竞争结瘤效果,结果表明本试验所采用的2个菌株与土著菌相比有更高的竞争结瘤能力,其固氮有效性也较高.
麦套稻栽培在丹江口市示范表现与技术改进意见

麦套稻栽培在丹江口示范,产量同比手插秧持平,节本增效显著,病虫危害轻,抗倒能力强,但成熟期推迟,前期已僵苗死苗,秧田难保水,杂草多苗稀.其技术改进意见是:地点严格选择,播期适当推迟,有效管水保水,科学追肥施肥,适期施药化除.
费氏石楠的组织培养

选用费氏石楠的嫩枝作为外植体进行组织培养,发现MS+6-BA 1.0 mg/L比较适合诱导费氏石楠腋芽的萌发;以MS为基本培养基,添加NAA0.1 mg/L、6-BA 1.0～1.5 mg/L,能促进不定芽增殖,产生的不定芽生长情况良好,增殖系数高,是比较适合的芽增殖培养基;以1/2MS为基本培养基,添加NAA 0.2 mg/L对生根有较好的促进效果,生根率达76%,在此基础上再添加大豆豆浆5～10g/L,生根率可高达100%,根生长良好.
江苏省水稻抗性育种的研究现状及对策

对江苏省在水稻抗病、抗虫、耐热(高温)和抗(耐)除草剂育种等方面的研究进展进行了综合分析,就今后的研究方向和重点提出建议.今后在重视种质资源的收集和创新的同时,要重点利用分子标记辅助育种、双单倍体育种等现代先进育种技术,实现多种抗虫、抗病、抗逆性状的聚合.
猪CACNA1S基因内含子37的克隆及多态性研究

根据不同物种间保守性及相似性的特点,跨内含子设计引物,利用聚合酶链式反应(PCR)技术对猪CAC-NA1S内含子37进行克隆;采用PCR-SSCP技术,检测金华与皮特兰杂交F_2代猪(JP F_2)和苏钟猪CALCN1S基因内含子37的单核苷酸突变点(SNP),并结合JP F_2猪生产性状进行相关分析.结果表明:(1)克隆得到猪CACNA1S基因内含子37完整DNA序列(235 bp);(2)在猪CACNA1S基因内含子37中检测到6个SNP;(3)相关分析显示,位点1S-76对体长存在显著性影响(0.01
基于连锁群定位SSR标记的蟠桃分子指纹检索表构建

以国家果树种质南京桃圃收集保存的38个蟠桃品种为试材,利用分布于不同连锁群的SSR标记进行蟠桃分子指纹图谱构建研究.结果表明,利用筛选出的位于8个连锁群的14对SSR引物,能将所有试材一一区分,根据多态性条带在品种中的分布,构建了蟠桃分子指纹检索表;38份蟠桃资源中的12份在指纹图谱上出现特异条带,分别是白蜜蟠桃、五月鲜扁干、碧霞蟠桃、美国蟠桃、玉露蟠桃、陈圃蟠桃、离核蟠桃、124蟠桃、香金蟠、农神、瑞蟠3号、黄露蟠桃,这些资源可作为特异资源重点保存.
水稻57H谷蛋白突变体的谷蛋白含量分析

采用SDS-PAGE电泳对2份57H谷蛋白突变体的谷蛋白含量进行测定,结果表明,2份57H突变体的谷蛋白前体增加而相应的成熟酸碱亚基明显减少.利用考马斯亮蓝G-250法经过3年的测定,结果发现2个突变体谷蛋白含量与对照品种W3660无显著差异,但谷蛋白含量较低,这与SDS-PAGE测定的谷蛋白成熟的酸碱性亚基含量减少的结果相一致.
T细胞表位预测及其在抗口蹄疫病毒疫苗研发中的应用研究进展

随着分子免疫学研究的不断发展,对T淋巴细胞免疫分子机制的阐释,大量T细胞表位信息以及功能基因组学资料的积累,使得基于数据驱动的预测T细胞表位的研究受到重视,可能成为疫苗研发的重要工具之一.本文阐述了T细胞表位预测的理论和方法及其在抗口蹄疫病毒疫苗研发中的应用,并讨论了未来的研究方向.
大蒜素在医药和畜牧业中的应用研究进展

对大蒜素在医药和养殖领域中的应用和研究进行概述.结果表明大蒜素对人体具有抗肿瘤、预防心脑血管疾病、抗微生物、抗溃疡等多种药理作用;将大蒜素添加到饲料中能刺激家禽的食欲,增强新陈代谢,增强机体免疫功能.由于大蒜素使用安全,不易产生耐药性,对环境安全,在医药和养殖业有广阔的发展前景.
中国LED背光源技术专利态势分析

选择"七国两组织"专利数据库,采集1985年1月1日到2008年12月31日期间的发光二极管(LED)背光源技术专利文献,建立专利数据库,选择广东专利信息服务平台分析系统,分别从专利申请总量、重点专利技术和重点专利持有人等方面,对LED背光源技术专利进行了深入的分析,提出了发展我国LED背光源技术的专利策略.
Assessing the health risk of heavy metals in vegetables to the general population in Beijing, China

A systematic survey of As, Cd, Cr, Cu, Ni, Pb and Zn concentrations in vegetables from 416 samples (involving 100 varieties) in Beijing was carried out for assessing the potential health risk to local inhabitants. The results indicated that the metal concentrations in vegetables ranged from < 0.001 to 0.479 μg/g fresh weight (fw) (As), < 0.001 to 0.101 μg/g fw (Cd), < 0.001 to 1.04 μg/g fw (Cr), 0.024 to 8.25 μg/g fw (Cu), 0.001 to 1.689 μg/g fw (Ni), < 0.001 to 0.655 μg/g fw (Pb) and 0.01 to 25.6 μg/g fw (Zn), with average concentrations of 0.013, 0.010, 0.023, 0.51, 0.053, 0.046 and 2.55 μg/g fw, respectively. The results showed that the concentrations of As, Cr, Cu, Cd, Pb and Ni in vegetables from open-fields were all significantly higher than those grown in greenhouses. In addition, in local-produced vegetables, all HMs except Zn were significantly higher than those in provincial vegetables. The estimated daily intake (EDI) of As, Cd, Cr, Cu, Ni, Pb and Zn from vegetables was 0.080, 0.062, 0.142, 3.14, 0.327, 0.283 and 15.7 μg/(kg bw·d) for adults, respectively. Arsenic was the major risk contributor for inhabitants since the target hazard quotient based on the weighted average concentration (THQ_w) of arsenic amounted to 44.3% of the total THQ (TTHQ) value according to average vegetable consumption. The TTHQ was lower than 1 for all age groups, indicating that it was still safe for the general population of Beijing to consume vegetables.
Adverse effects of metal exposure on chemotaxis towards water-soluble attractants regulated mainly by ASE sensory neuron in nematode Caenorhabditis elegans

Chemotaxis to water-soluble attractants is mainly controlled by ASE sensory neuron whose specification is regulated by che-1 in Caenorhabditis elegans. Our data here suggest that exposure to high concentrations of metals, such as Pb, Cu, Ag, and Cr, would result in severe defects of chemotaxis to water-soluble attractants of NaCl, cAMP, and biotin. Moreover, the morphology of ASE neuron structures as observed by relative fluorescent intensities and relative size of fluorescent puncta of cell bodies, relative lengths of sensory endings in ASE neurons, and the expression patterns of che-1 were obviously altered in metal exposed animals when they meanwhile exhibited obvious chemotaxis defects to water-soluble attractants. In addition, the dendrite morphology could be noticeably changed in animals exposed to 150 μmol/L of Pb, Cu, and Ag. Furthermore, we observed significant decreases of chemotaxis to water-soluble attractants in Pb exposed che-1 mutant at concentrations more than 2.5 μmol/L, and in Cu, Ag, and Cr exposed che-1 mutant at concentrations more than 50 μmol/L. Therefore, impairment of the ASE neuron structures and functions may largely contribute to the appearance of chemotaxis defects to water-soluble attractants in metal exposed nematodes.
Identification and characterization of the chromium(Ⅵ) responding protein from a newly isolated Ochrobactrum anthropi CTS-325

A Gram-negative, chromium(Ⅵ) tolerant and reductive strain CTS-325, isolated from a Chinese chromate plant, was identified as Ochrobactrum anthropi based on its biochemical properties and 16S rDNA sequence analysis. It was able to tolerate up to 10 mmol/L Cr(Ⅵ) and completely reduce 1 mmol/L Cr(Ⅵ) to Cr(Ⅲ) within 48 h. In addition, when the strain CTS-325 was induced with Cr(Ⅵ), a protein increased significantly in the whole cell proteins. Liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis revealed that this protein was a superoxide dismutase (SOD) homology. The measured superoxide dismutase activity was 2694 U/mg after three steps of purification. The SOD catalyzes the dismutation of the superoxide anion (O_2~(·-)) into hydrogen peroxide and molecular oxygen. This protein is considered to be one of the most important anti-oxidative enzymes for O. anthropi as it allows the bacterium to survive high oxygen stress environments, such as the environment produced during the reduction process of Cr(Ⅵ).
Variation of phytoplankton community before an induced cyanobacterial (Arthrospira platensis) bloom

A cyanobacterial (Arthrospira platensis) bloom was induced in situ by nutrient manipulation in an enclosure. The succession of the phytoplankton community and the water chemistry variations before the appearance of bloom, as well as their relationship, were investigated. The cell pigment variations were studied simultaneously. The Pearson's correlation analysis showed that there was no significant correlation between water chemistry and green algal or cyanobacterial composition, indicating that water chemistry variations were not suitable to be used as indicators for cyanobacterial-bloom early-warning. However, the diversity index of the phytoplankton community decreased sharply before the bloom appeared. Therefore, the dynamics of phytoplankton community was put forward to be an indicator for cyanobacterial-bloom early-warning. In addition, the cell pigment variations represented the changes of community structure, which should be useful for studying the dynamics of phytoplankton community.
论健全环境影响评价法律制度的几个问题

环境影响评价制度是从源头控制环境污染和生态破坏的法律手段,但中国的环境影响评价制度在实施中却存在执行率高、效果差的尴尬困境.探讨了健全环境影响评价制度的指导思想和途径,并从完善战略环境影响评价制度、环境影响评价审批制度、公众参与制度、法律责任制度等方面进行了具体论述.
应用随机前沿模型评测中国区域研发创新效率

以1998～2007年中国30个省份的研发面板数据为样本,应用随机前沿模型实证测算了各区域的研发创新效率,并基于系统角度,考察了区域创新系统内部企业、高校、科研机构、地方政府及金融机构等主体要素及其联结关系对创新效率的影响.主要的研究发现有:考察期内中国研发创新效率仍处于较低水平,但逐年不断提高;各主体要素及其之间的联结对创新效率均产生负向作用,这反映出中国当前区域创新系统网络建设并不理想.改善区域创新环境,加强区域创新系统网络能力建设对创新效率的提升具有重要意义.
声誉、心理契约与企业间关系:基于在华外资企业采购视角的研究

企业间关系机制是国内外研究的重点和难点.本研究以在华外资企业采购为视角,引入传统研究所忽视的企业声誉和心理契约,以关系协同和关系响应为落脚点,提出并指明全新的中国本土企业关系管理思路,从而为解析企业间关系"黑箱"提供了新视角.研究发现(1)社会责任和公平声誉对于企业间心理契约具有正效应;(2)企业间心理契约对于关系的协同和响应具有显著影响;(3)企业间心理契约是声誉部分维度对关系质量影响的中介变量;(4)在环境不确定背景下,企业间心理契约关系建构才能够有效规避环境波动,确保企业间关系的长期和稳定发展.
浙江省中小企业转型升级调查报告

国内外经济发展形势发生深刻变化,转型升级已经成为中小企业发展的重要战略选择.本文在总结以往研究的基础上,通过大量调研,对浙江中小企业转型升级的主要方式、分布特点、影响因素进行了分析,阐述了浙江中小企业转型升级与宏观经济发展之间的关系,剖析了推动浙江中小企业转型升级过程中存在的主要问题,并提出了相关政策建议.
内部人控制与公司的股利政策——基于宇通客车的案例分析

我国上市公司的股利政策问题是一个重要而又复杂的问题,有必要将我国制度背景和西方的经典理论结合起来对这一问题进行研究,从而得到更可靠的结论.本文以宇通客车为研究对象,采用案例分析的方法研究了该企业在改制过程中所形成的内部人控制对股利政策的影响,发现股利政策往往成为内部人"掏空"上市公司的重要手段,这种"掏空"行为会对上市公司的价值产生负面影响.
货币政策传导中的居民行为——基于前景理论的视角

本文以货币政策传导中的居民消费和投资行为为研究对象,运用实验经济学方法,考察居民行为对货币政策传导的影响.研究发现在我国社会保障制度不健全的现状下,居民行为在很大程度上制约着货币政策的传导效果;本文还从合理引导居民行为的视角重新审视货币政策的制定与实施.
新经济地理学视角下的生产性服务业集聚及其影响因素研究——来自中国222个城市的经验证据

本文在新经济地理学理论的基础之上,结合新古典经济学和城市经济学理论尝试性地提出了生产性服务业集聚的理论框架,探索研究了中国生产性服务业集聚的成因与发展趋势,并采用全国222个地级以上城市的截面数据进行了实证分析.研究表明知识密集度、信息技术水平、城市和政府规模对生产性服务业集聚有显著的影响,并表现出一定的区域差异性,与制造业集聚相比,生产性服务业集聚不论在受地理因素影响方面,还是受累积循环因果关系影响方面都较弱.另外,根据服务业集聚与城市规模非线性关系研究表明,由于中国东部与中西部地区存在截然相反的集聚路径,这使得中国东部地区城市将长期存在集聚效应,而中西部地区在城市相对规模达到一定的熵值后集聚效应开始递减,为此,文章提出了中国城市差异化发展战略的政策措施.
基于环境效应调整的农业生产力绩效评价研究

本文利用多种比较分析模型对我国农业生产力绩效进行了实证测量,得出基于环境效应调整的农业生产力绩效水平要远远高于传统方法的评价结果的结论,为我国农业社会功能的重新定位提供了一个理论基础.
FDI、产业结构变迁与中国的出口竞争力

本文描述了1980年以来中国产业结构、贸易结构以及出12竞争力的演变趋势,并分析了FDI对中国产业结构变迁和出12竞争力的影响.统计分析表明,中国生产和出口的行业结构以及出12竞争力呈现出高度一致的变化趋势,即都由劳动密集型行业转向资本及技术密集型行业.进一步的经验研究发现,FDI推动了中国的产业结构升级,并显著提升了中国的出口竞争力.除FDI之外,技术进步和劳动力成本对中国出口竞争力的影响也非常明显.
基于二次创新动态过程的组织学习模式演进——杭氧1996～2008纵向案例研究

开放、动态的"引进消化吸收再创新"仍是现阶段我国企业自主创新的主要方式之一.本文作为前期对杭氧1978～1995年二次创新与组织学习动态演化案例研究的后续跟踪研究,试图通过对杭氧1996～2008年在更为开放的技术与市场环境下在非成套引进的新兴技术基础上所开展的二次创新过程的深度研究,进一步深化了1995年初步提出的"基于二次创新过程的组织学习模式演进"理论模型:分析了企业二次创新从基于第I类技术引进(成套、成熟技术)向基于第Ⅱ类技术引进(非成套、新兴技术)升级过程中的学习模式动态演化规律;进而对技术范式转变期的非线性学习模式(过渡型学习、创造型学习)与线性学习模式(维持型学习、发展型学习)的辩证演化规律进行了探索.
顾客满意带来什么忠诚?

过去几十年间,满意度战略受到广泛关注,因为很多人认为顾客满意能带来顾客忠诚.然而,满意真的能带来忠诚吗?本文认为这一问题不能笼统地回答"是"或"不是",因为忠诚是个很复杂的概念,有人用重购等行为变量测量,也有人用信任等态度变量测量;而满意与各忠诚变量之间的联系是千差万别的.以往的研究中,学者们只是从不同角度分别验证了满意与各忠诚变量的关系,并未对"满意能否带来忠诚"、"能带来什么样的忠诚"做出系统可靠的回答.而回答这一问题靠单一研究很难做到,需要综合多年的研究来发现比较稳定的规律.本文采用元分析的方法,在整合1980～2007年100项研究的基础上发现,满意对行为忠诚的影响不像对态度忠诚的影响那么稳定.
"家和"真能"万事"兴吗?——基于企业家默会知识代际转移视角的一个实证检验

企业家默会知识在代际间的成功转移是家族企业顺利延续的关键.本文重点探讨了家族情境对企业家默会知识代际转移的影响机理.对来自中国96家处于传承过程不同阶段的家族企业调查数据的统计分析发现:家族情境可以从家族亲密度、家族集体倾向和家族适应性3个维度来刻画,企业家默会知识代际转移应从诀窍知识获取、心智模式领悟、诀窍知识承诺和心智模式承诺4个维度进行测度.家族亲密度对企业家默会知识代际转移的4个维度都具有显著的正向影响,家族适应性仅对心智模式领悟维度有着显著的正向影响,而家族集体倾向对4个维度的影响均不显著.在任者-继承人关系质量对家族亲密度和诀窍知识获取之间的关系存在完全中介效应,对家族亲密度和诀窍知识承诺之间的关系存在不完全中介效应.
正畸患者牙周炎的中药辅助治疗及机制研究

目的 观察中药配合牙周基础治疗对口腔正畸患者牙周炎的疗效,并通过对免疫学指标的测定探讨其可能的作用机制.方法 将符合标准的牙周炎患者121例随机分为两组:治疗组61例给予中药(本组为玉女煎)配合龈上洁治术以及龈下刮治术等牙周基础治疗,对照组60例仅给予牙周基础治疗.比较两组患者疗效及并进行外周血CD_3~+、CD_4_+、CD_8~+T细胞亚群、CD_4/CD_8比值以及免疫球蛋白IgA、IgG、IgM含量测定.结果 经两个疗程治疗后,治疗组总有效率及免疫功能改善状况均优于对照组(P＜0.05).结论 中药(玉女煎)配合牙周基础治疗对口腔正畸患者牙周炎的疗效优于单独进行基础治疗:中药的作用机制可能是通过改善牙周炎患者的免疫状况而实现的.
新类风湿因子检测阈值诊断早期类风湿关节炎及其应用价值

目的 确定类风湿因子(RF)诊断早期类风湿性关节炎(RA)的新检测阈值,结合 anti-CCP、AKA等抗体检测提高诊断效率.方法 252例(早期RA 129例、其他自身免疫性疾病83例及正常对照40例)血清用速率散射比浊法检测RF、ELlSA方法检测CCP抗体,间接免疫荧光法检测AKA.利用受试者特征曲线(ROC)确定RF早期RA诊断阈值,并对RF、CCP及AKA抗体结果与患者的骨侵蚀程度进行相关性分析.结果 从ROC曲线中得到当RF对早期RA诊断阈值为40 U/ml,敏感性为33.3%,特异性为96.4%,当RF≥40 U/ml与骨侵蚀程度有一定的相关性(P＜0.05).RF<40U/ml但CCP抗体阳性时与骨侵蚀程度有一定的相关性(P＜0.05),RF＜40 U/ml且CCP抗体阴性但AKA阳性时发生骨侵蚀的可能性大.结论 在RF关于早期RA的诊断阈值为40 U/ml时,顺序检测CCP、AKA抗体可以节约检测成本,提高检测效能.
伴白质疏松急性脑梗死危险因素分析

目的 分析伴脑白质疏松(LA)急性脑梗死患者的相关危险因素,探讨LA发病机制及其与急性脑梗死的关系.方法 对2006年1月～2008年12月发病48 h内住院的173例急性脑梗死患者进行回顾性研究,对其中可能的多项致病危险因素进行分析.结果 和结论本组急性脑梗死合并LA者63例.高龄、高血压史、糖尿病、颈内动脉斑块或狭窄、卒中史是伴LA急性脑梗死的独立危险因素;伴LA急性脑梗死好发部位为基底节或皮质下自质,腔隙性脑梗死发生率高.脑小血管病变可能是LA的病理生理学基础.
How the "Best" Models Project the Future Precipitation Change in China

Projected changes in summer precipitation characteristics in China during the 21st century are assessed using the monthly precipitation outputs of the ensemble of three "best" models under the Special Report on Emissions Scenarios (SRES) A1B,A2,and Bl scenarios.The excellent reproducibility of the models both in spatial and temporal patterns for the precipitation in China makes the projected summer precipitation change more believable for the future 100 years.All the three scenarios experiments indicate a consistent enhancement of summer precipitation in China in the 21st century.However,the projected summer precipitation in China demonstrates large variability between sub-regions.The projected increase in precipitation in South China is significant and persistent,as well as in North China.Meanwhile,in the early period of the 21st century,the region of Northeast China is projected to be much drier than the present.But,this situation changes and the precipitation intensifies later,with a precipitation anomaly increase of 12.4%-20.4% at the end of the 21st century.The region of the Xinjiang Province probably undergoes a drying trend in the future 100 years,and is projected to decrease by 1.7%-3.6% at the end of the 21st century.There is no significant long-term change of the projected summer precipitation in the lower reaches of the Yangtze River valley.A high level of agreement of the ensemble of the regional precipitation change in some parts of China is found across scenarios but smaller changes are projected for the Bl scenario and slightly larger changes for the A2 scenario.
Variability of Northeast China River Break-up Date

This paper investigates the variability of the break-up dates of the rivers in Northeast China from their icebound states for the period of 1957-2005 and explores some potential explanatory mechanisms.Results show that the break-up of the two major rivers (the Heilongjiang River and Songhuajiang River) was about four days earlier,and their freeze-up was about 4-7 days delayed,during 1989-2005 as compared to 1971-1987.This interdecadal variation is evidently associated with the warming trend over the past 50 years.In addition,the break-up and freeze-up dates have large interannual variability,with a standard deviation of about 10-15 days.The break-up date is primarily determined by the January-February-March mean surface air temperature over the Siberian-Northeast China region via changes in the melting rate,ice thickness,and snow cover over the ice cover.The interannual variability of the break-up date is also significantly connected with the Northern Annular Mode (NAM),with a correlation coefficient of 0.35-0.55 based on the data from four stations along the two rivers.This relationship is attributed to the fact that the NAM can modulate the East Asian winter monsoon circulation and Siberian-Northeast China surface air temperature in January-February-March.
Regional Variability of Climate Change Hot-Spots in East Asia

The regional climate change index (RCCI) is employed to investigate hot-spots under 21st century global warming over East Asia.The RCCI is calculated on a 1-degree resolution grid from the ensemble of CMIP3 simulations for the B1,A1B,and A2 IPCC emission scenarios.The RCCI over East Asia exhibits marked sub-regional variability.Five sub-regional hot-spots are identified over the area of investigation:three in the northern regions (Northeast China,Mongolia,and Northwest China),one in eastern China,and one over the Tibetan Plateau.Contributions from different factors to the RCCI are discussed for the sub-regions.Analysis of the temporal evolution of the hot-spots throughout the 21st century shows different speeds of response time to global warming for the different sub-regions.Hot-spots firstly emerge in Northwest China and Mongolia.The Northeast China hot-spot becomes evident by the mid of the 21st century and it is the most prominent by the end of the century.While hot-spots are generally evident in all the 5 sub-regions for the A1B and A2 scenarios,only the Tibetan Plateau and Northwest China hot-spots emerge in the Bl scenario,which has the lowest greenhouse gas (GHG) concentrations.Our analysis indicates that sub-regional hot-spots show a rather complex spatial and temporal dependency on the GHG concentration and on the different factors contributing to the RCCI.
The Antarctic Oscillation-East Asian Summer Monsoon Connections in NCEP- and ERA-40

Connections between the spring Antarctic Oscillation (AAO) and the East Asian summer monsoon (EASM) in two reanalysis datasets-NCEP-1 (NCEP/NCAR Reanalysis 1) and ERA-40 (ECMWF 40-year Reanalysis)-are investigated in this study.Both show significant correlation between AAO and EASM rainfall over the Yangtze River valley,especially after about 1985.Though ERA-40 shows weaker anomalous signals connecting AAO and EASM over southern high latitudes than NCEP-1,both datasets reveal similar connecting patterns between them.A wave-train-like pattern appears in the upper levels,from southern high latitudes through east of Australia and from the Maritime Continent to East Asia.In positive AAO years,the cross equatorial southeasterly flow over the Maritime Continent in the lower levels is strengthened,the specific humidity of the whole atmosphere over East Asia increases,and convective activity is enhanced; thus the summer rainfall over East Asia increases.The spring AAO-EASM connection may be better represented in ERA-40.
A Daily Temperature Dataset over China and Its Application in Validating a RCM Simulation

This paper describes the construction of a 0.5°×0.5° daily temperature dataset for the period of 1961-2005 over mainland China for the purpose of climate model validation.The dataset is based on the interpolation from 751 observing stations in China and comprises 3 variables:daily mean,minimum,and maximum temperature.The "anomaly approach" is applied in the interpolation.The gridded climatology of 1971-2000 is first calculated and then a gridded daily anomaly for 1961-2005 is added to the climatology to obtain the final dataset.Comparison of the dataset with CRU (Climatic Research Unit) observations at the monthly scale shows general agreement between the two datasets.The differences found can be largely attributed to the introduction of observations at new stations.The dataset shows similar interannual variability as does CRU data over North China and eastern part of the Tibetan Plateau,but with a slightly larger linear trend.The dataset is employed to validate the simulation of three extreme indices based on daily mean,minimum,and maximum temperature by a high-resolution regional climate model.Results show that the model reproduces these indices well.The data are available at the National Climate Center of China Meteorological Administration,and a coarser resolution (1°×1°) version can be accessed via the World Wide Web.
A Review on Aspects of Climate Simulation Assessment

This paper reviews some aspects of evaluation of climate simulation,including the ITCZ,the surface air temperature (SAT),and the monsoon.A brief introduction of some recently proposed approaches in weather forecast verification is followed by a discussion on their possible application to evaluation of climate simulation.The authors suggest five strategies to extend the forecast verification methods to climate simulation evaluation regardless significant differences between the forecasts and climate simulations.It is argued that resolution,convection scheme,stratocumulus cloud cover,among other processes in the atmospheric general circulation model (AGCM) and the ocean-atmosphere feedback are the potential causes for the double ITCZ problem in coupled models and AGCM simulations,based on the system- and component-level evaluations as well as the downscaling strategies in some recent research.Evaluations of simulated SAT and monsoons suggest that both coupled models and AGCMs show good performance in representing the SAT evolution and its variability over the past century in terms of correlation and wavelet analysis but poor at reproducing rainfall,and in addition,the AGCM alone is not suitable for monsoon regions due to the lack of air-sea interactions.
煅后焦二氧化碳反应活性的影响因素

在过去的几年中,为了帮助工厂评价新人厂生焦和监控目前所用的生焦,实验室作了大量石油焦煅烧的实验研究.在这段时间里,建立了一个包括从32个不同炼油厂抽取159个不同样品总数为585次煅烧的庞大的数据库.通过在不同温度下煅烧大量的生焦得出的众多煅烧数据来预测生产所需煅后焦的物理性能和煅烧温度.
稻壳生物质颗粒成型机理的显微观察

采用电子显微镜对稻壳生物质颗粒进行显微观察,从而分析了稻壳生物质颗粒的成型机理,包括化学和物理两方面.该研究工作为稻壳生物质颗粒燃料技术的开发及产业化应用奠定了基础.
实地氮肥管理技术及对水稻生育及氮肥利用率的影响

通过对常规品种辽星1和杂交粳稻辽优5218进行不同氮肥施用量和施用方式处理,结果表明通过实地氮肥管理方式(SSNM),辽星1和辽优5218的农学氮利用率(AE)和氮肥偏生产力(PFP)都明显高于常规施肥处理.这两个品种的AE分别达到了30.7 kg/kgN 和26.0 kg/kgN,并超过了热带稻区的AE(15～25 kg/kg N ).这两个品种的PFP分别为72.6 kg/kgN和73.8 kg/kgN,已接近日本的PFP水平(73 kg/kgN).SSNM明显降低了氮肥用量,提高了氮肥利用率,同时产量并未降低,反而有所增加,减少了投入,增加了效益.
Synthesis and Characterization of Novel Trifluoromethylphenyl Silane Monomers

Using 3,5-bis(trifluoromethyl)bromobenzene and methyltrimethoxysilane or tetraethoxysilane as raw materials, novel trifluoromethylphenyl silanes were synthesized via Grignard reaction and substitution reaction, and the molecular structure of silane products was characterized by NMR, FT-IR, MS techniques and elemental analysis. The reaction result showed that the reactivity of Grignard reagent was different in THF and diethyl ether when subjected to substitution reaction, which gave three products with different substitution degree. According to the current work, mono-, di- and tri-substituted product can be obtained selectively from the same reactants by controlling the reaction condition.
消防给水系统中增压和稳压设施设计探讨

明确了消防给水系统中高位消防水箱的作用,讨论了增压设施的概念,提出了局部稳压设施的概念.指出了消防气压水罐的设置容积应根据不同的系统形式确定,分析了增压水泵设计的流量、扬程和控制,并提出了增压设施的设计流程.
两种节能措施的探讨与应用

在地下水位较高、施工期间需长期进行基坑降水的工业及民用项目中,利用可拆卸装配式消防水箱兼做调蓄水箱.当地下水无腐蚀性时,可考虑利用基坑降水所排出的浅层地下水做施工现场卫生间冲洗用水及现场水泥砂浆搅拌等施工用水.此外,对长距离、小流量室外排水管道,在排水管道起端对污水进行简单固液分离,利于下游排水管道通畅,减小下游排水管管径,进而降低相关排水管道安装的工程量.
自动粉料投加系统在给水厂中的应用

为提高出厂水水质和应对原水突发性水质污染,越来越多的给水厂采用粉料投加技术,有针对性地投加粉末活性炭、石灰、沸石粉等.随着这些技术在国内的逐步推广使用,投加设备建设和系统控制方面的局限日益突出,详细介绍了一种自动粉料投加系统的组成、控制方法和实际效果,并提出了该系统在应用中应注意的问题.