洄滞模式下rf SQUID用于测量HT_c超导体序参数的位相

我们证明了插入序参数位相的多节环构成rf SQUID应满足的条件.并在rf SQUID理论框架下,给出了洄滞模式下(β>1)测量高温超导体序参数对称性中位相信息的工作原理.国家超导技术联合研究开发中心资助项目中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)0132-351

新疆塔里木盆地北部碳酸盐岩、碎屑岩油气富集条件及评价研究

该专题属中国“八五”重点科技攻关项目《新疆塔里木盆地油气资源》下属一级专题，编号为８５－１０１－０４－０１。研究报告以当代沉积学、储层地质学等相关学科的最新理论为指导，系统论述了塔里木盆地北部震旦系－第三系的层序地层、沉积及成岩作用特征；深入研究了白垩－第三系沉积特征，指出中新生代陆相前陆盆地有利于生油的大型复合密集段的时空分布及有利于储盖发育的沉积体系域，指出重要储集体可划分为南北两大不同沉积体系，其中南部主要为河流－三角洲（包括辫状三角洲）沉积体系，储集物性优良。系统研究了碳酸盐岩、碎屑岩的成岩作用、成岩序列、成岩阶段划分及成岩演化特征；研究了热水热液溶蚀作用及其对储集性能的影响；划分了碳酸盐岩及碎屑岩的成岩演化系统，其中以长期浅埋型成岩系统最好，有利于原生孔隙的形成和次生空隙的形成。综合分析了该区油气源、圈闭、运移与聚集、保存等油气富集的基本条件和油气富集规律，并以储盖层评价为核心，指出塔北地区具有形成大油气田的地质条件。划分了该区大油气田的类型，提出了勘探方向，对塔北地区进行了油气远景评价，在一、二级远景区中圈出了１８个油气富集带，并对塔北地区的勘探部署提出了具体建议

渤海中部油气开采区石油烃环境质量评价及源解析

对渤海中部油气开采区表层沉积物中的石油烃含量进行了环境质量评价，分析了正构烷烃和多环芳烃分子组成特征，并对其来源进行了解析．结果表明，石油类浓度为12.5&mdash;860 &mu;ｇ/ｇ之间，污染指数为0.61&mdash;41.97；随着与采油平台距离的增加，平台周边海域石油烃含量和污染水平呈现降低的趋势；沉积物沉积时为缺氧还原的沉积环境．正构烷烃的分布特征和甾萜烷生物标志化合物表明，源自大陆高等植物和海洋浮游生物的烷烃共存于渤海近代沉积物中，石油类产品和化石燃料燃烧产物对其贡献不能忽视；石油平台站位ＰＡＨｓ主要来自石油的直接输入，其它站位主要来自燃烧源。</p

Environmental quality and source identification of petroleum hydrocarbons in the surface sediment of the oil and gas exploration zone in the central of Bohai Sea

The concentrations of petroleum hydrocarbons from the surface sediments,collected from oil and gas exploration area in central Bohai Sea were measured to investigate the spatial distributions,analyze the sources according to the component characteristics of n-alkane and polycyclic aromatic hydrocarbons (PAHs),and evaluate environmental quality. The results showed that the petroleum hydrocarbons contents in surface sediments ranged from 12.5 mug·g~(-1) to 860 mug·g~(-1),and the pollutant standard index (PSI) was in the range of 0.61-41.97. The concentration and PSI in sediment decreased with the distanced from the oil drilling platform. The sediment environment was anoxic reduction. The distribution of n-alkanes and sterane,terpane biomarkers indicate that the alkanes from higher plants and marine plankton coexist in the sediments of Bohai Sea. Petroleum products and fossil fuel combustion products should not be ignored for modern sediments of Bohai Sea. PAHs in sediment from oil platform stations are mainly from the direct input of oil,while other stations mainly from combustion sources

基于定量指纹图谱技术的中药质量控制

定量指纹图谱技术是中药指纹图谱技术与多指标成分定量分析相结合的中药质量控制模式。定量指纹图谱技术的发展包括定量组分的制备、过程控制的指纹图谱技术和产品含量测定3个主要部分。本文以丹参为例,通过水提、醇沉、过膜、大孔树脂分离和工业色谱分离5个工艺流程制备了丹参定量组分,对各个工艺步骤以指纹图谱技术考察其稳定性和重复性。对丹参定量组分中的原儿茶醛、迷迭香酸、丹酚酸B3个成分进行含量测定。3个成分的含量总和大于50%。定量组分的制备以现有的活性成分为目标,经过去粗存精的工艺过程,其质量标准得到了有效的提高

THE GEOCHEMICAL CHARACTERISTICS OF SOIL GAS IN THE SOUTHEASTERN PART OF HAIYUAN FAULT

在海原断裂带东南段4个地点跨断层测量了土壤气中He、H2、N2、O2、CH4、C2H6、Rn和Hg的浓度及He、H2、CH4、Rn和Hg的通量。测量结果表明,N2/O2、Hg和Rn的背景值分别是4.2、50.4ng/m3和5.8kBq/m3;土壤气中He和CH4在海原断裂带东南段端部有强烈异常,并且脱气强烈,通量分别达到6.9mgm-2d-1和390mgm-2d-1;土壤气中H2和Rn是指示海原断裂东南段破裂位置非常有利的气体组分,在靠断裂中部区域通量达到最高,分别为5.5mgm-2d-1和828.6mBqm-2s-1;土壤气中Hg在断裂带的异常可作为指示断裂破裂位置的参考信号,其通量最高达到211.2ngm-2h-1。

海原断裂带东南段土壤气体地球化学特征

在海原断裂带东南段4个地点跨断层测量了土壤气中He,H2,N2,O2,CH4,C2H6,Rn和Hg的浓度及He,H2,CH4,Rn和Hg的通量.测量结果表明,N2/O2,Hg和Rn的背景值分别是4.2,50.4ng/m3和5.8kBq/m3;土壤气中He和CH4在海原断裂带东南段端部有强烈异常,并且脱气强烈,通量分别达到6.9mgm-2d-1和390mgm-2d-1;土壤气中H2和Rn是指示海原断裂东南段破裂位置非常有利的气体组分,在靠断裂中部区域通量达到最高,分别为5.5mgm-2d-1和828.6mBqm-2s-1;土壤气中Hg在断裂带的异常可作为指示断裂破裂位置的参考信号,其通量最高达到211.2ngm-2h-

The Prevalence of HEV among Pigs and Cattle

目的 探讨戊型肝炎病毒(HEV)在猪和牛群中的感染情况。方法 用抗-HEV抗体试剂盒检测猪和牛血清中的抗体;对部分血清用逆转录聚合酶链的方法(RT-PCR)检测HEV RNA,并对PCR阳性产物进行克隆测序,然后将序列进行分析。结果 281份猪血清中有235份为抗-HEV抗体阳性,阳性率为83.6％;其中56份血清中有3份为HEV RNA阳性,序列分析显示从猪中克隆的3株序列(SB 2、SH1和SJ 14)之间在ORF 2(6007-6354bp)区域的核苷酸序列的同源性为83％～86％,该3株序列在ORF 2区与1,2,3,4型的同源性分别为74％～79％、73％～77％,73％～76％和83％～93％;190份牛血清中有12份为抗-HEV抗体阳性,阳性率为6.3％。结论 HEV在猪和牛群中均有流行,但在猪群中的流行率明显高于牛群。猪感染的HEV的基因序列与人群中散发性戊型肝炎病毒的4型同源性最高。Objective To investigate prevalence of HEV in pigs and cattle. Methods The and - HEV antibody was detected in sera collected from pigs and cattle with anti - HEV EIA.HEV RNA was detected using RT- PCR with ORF 2 primers.The positive PCR products were cloned and sequenced.The sequences were compared with the reported HEV isolates. Results 235 of 281 pigs' sera were positive for anti - HEV antibody.3 of 56 pigs sera were positive for HEV RNA.The sequence analysis showed that the identity at nucleotide level was 83% - 86% among them.They had 74% - 79%, 73% - 77%, 73% - 76% and 83% - 93% identity to genotypes 1, 2, 3 and 4 respectively in this region. 12 of 190 cattle' s sera were positive for anti - HEV antibody. Conclusion The prevalence of HEV is much higher in pigs than in cattle. HEV sequences isolated from pigs belong to HEV 4 isolated from patients with acute hepatitis