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扬子板块北缘碧口群火山岩的地球化学特征及其构造环境

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岩石矿物学杂志 2004年第1期23卷 1-11页

作者：闫全人 andrew d.hanson 王宗起闫臻 Peter A.druschke 王涛刘敦一宋彪姜春发中国地质科学院地质研究所北京100037 department of Geosciences University of Nevada 中国科学院地质与地球物理研究所北京100029

碧口群火山岩系中部的基性熔岩以拉斑系列为主 ,基性火山岩的Sr同位素初始比值和Nd同位素初始比值较低 ,分别为 0 .70 12 4 8～ 0 .70 4 4 13和 0 .5 110 80～ 0 .5 12 341,大部分样品的εNd(t) >0 ,表明母岩浆主要来自地幔源区。岩石... 详细信息

碧口群火山岩系中部的基性熔岩以拉斑系列为主 ,基性火山岩的Sr同位素初始比值和Nd同位素初始比值较低 ,分别为 0 .70 12 4 8～ 0 .70 4 4 13和 0 .5 110 80～ 0 .5 12 341,大部分样品的εNd(t) >0 ,表明母岩浆主要来自地幔源区。岩石显示明显的富2 0 7Pb及2 0 8Pb特征。在以部分熔融作用为主的演化过程中岩浆发生了一定程度的分异 ,LREE、大离子亲石元素等表现了从亏损到富集的变化特点。基性熔岩的稀土与微量元素表现出与俯冲碰撞型的弧区玄武岩相同的特点。分析表明 :碧口群火山岩系形成于岛弧环境 ,它与横丹群浊积岩系在扬子板块西北缘构筑了一个弧盆系统 ,其时代为新元古代。

关键词：地球化学 Sr-Nd—Pb同位素碧口群火山岩弧一盆系统扬子板块新元古代

高产头孢菌素酶大肠杆菌临床株的AmpC启动子突变

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中华微生物学和免疫学杂志 2001年第S1期21卷 69-70页

作者：蒋燕群 Ellen Moland 倪语星 Nancy d.hanson 上海市第六人民医院检验科 200233 美国Creighton大学抗感染和分子生物学研究中心上海第二医科大学附属瑞金医院检验科

目的　研究高产AmpC头孢菌素酶的大肠埃希菌的基因突变。方法　报道 6株高产AmpC头孢菌素酶的大肠埃希菌。对其中具有不同头孢西丁MIC的 4株菌进行了基因序列分析。结果　在启动子 32位置上 ,有 3株菌 (大肠埃希菌 6 82 ,12 2 ,999)的T... 详细信息

目的　研究高产AmpC头孢菌素酶的大肠埃希菌的基因突变。方法　报道 6株高产AmpC头孢菌素酶的大肠埃希菌。对其中具有不同头孢西丁MIC的 4株菌进行了基因序列分析。结果　在启动子 32位置上 ,有 3株菌 (大肠埃希菌 6 82 ,12 2 ,999)的T→A ;菌株 2 38在 14和 13之间插入G和T两个碱基。在菌株 6 82 ,12 2 ,2 38的衰减子上有 4～ 5个碱基发生突变 ,尤其在 +2 2位置上的C→T ,+32和 +37位置上的G→A。

关键词： AmpC β-内酰胺酶启动子衰减子

4株AmpC启动子和衰减子突变大肠埃希菌的分析研究

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上海医学检验杂志 2002年第4期17卷 204-207页

作者：蒋燕群倪语星 Nancy d.hanson 上海市第六人民医院检验科上海200233 上海第二医科大学附属瑞金医院临床微生物科上海200025 美国Creighton大学抗感染和分子生物学研究中心 omaha68178

目的　研究启动子和衰减子突变与大肠埃希菌高产AmpC酶的关系。方法　用琼脂稀释法、双纸片法、三相试验、等电聚焦电泳 (IEF)和聚合酶链反应 (PCR)检测其耐药机制 ,并对其AmpC的启动子和衰减子直接进行基因序列分析。衰减子的发夹状... 详细信息

目的　研究启动子和衰减子突变与大肠埃希菌高产AmpC酶的关系。方法　用琼脂稀释法、双纸片法、三相试验、等电聚焦电泳 (IEF)和聚合酶链反应 (PCR)检测其耐药机制 ,并对其AmpC的启动子和衰减子直接进行基因序列分析。衰减子的发夹状二级结构用dNASIS软件分析。结果　琼脂稀释法、双纸片法、三相试验、IEF和PCR证明这 4株菌都产染色体AmpC酶 ,基因序列分析提示它们在启动子和衰减子上都有不同程度的突变 ,同时还观察到其中一株菌的衰减子的G C发夹状二级结构由于突变导致△G 7.6kcal/mol的变化。

关键词： AmpC 启动子衰减子大肠埃希菌

A Myosin XI Tail domain Homologous to the Yeast Myosin Vacuole-Binding domain Interacts with Plastids and Stromules in Nicotiana benthamiana

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Molecular Plant 2009年第6期2卷 1351-1358页

作者： Amir Sattarzadeh Johanna Krahmer Arnaud d. Germain Maureen R. hanson department of Molecular Biology and Genetics Biotechnology Building Cornell University Ithaca NY 14853 USA

The actin cytoskeleton plays a role in mobility of many different organelles in plant cells, including chloroplasts, mitochondria, Golgi, and peroxisomes. While progress has been made in identifying the myosin motors involved in trafficking of various plant organelles, not all of the cargoes mobilized by different members of the myosin XI family have yet been identified. The involvement of myosins in chloroplast positioning and mitochondrial movement was demonstrated by expression of a virus-induced gene silencing （VIGS） construct in tobacco. When VIGS with two different conserved sequences from a myosin Xl motor was performed in plants with either GFP-labeled plastids or mitochondria, chloroplast positioning in the dark was abnormal, and mitochondrial movement ceased. Because these and prior obser- vations have implicated a role for myosins and the actin cytoskeleton in plastid and stromule movement, we searched for myosin tail domains that could associate with plastids and stromules. While a yellow fluorescent protein （YFP） fusion with the entire tail region of myosin XI-F was usually found only in the cytoplasm, we observed that an Arabidopsis or Nicotiana benthamiana YFP：：myosin XI-F tail domain homologous to the yeast myo2p vacuole-binding domain associated with plastids and stromules after transient expression in N. benthamiana. Taken together, these observations implicate myosin motor proteins in dynamics of plastids and stromules.

关键词： Chloroplast biology cytoskeleton dynamics mitochondria gene silencing fluorescent protein.

developmental and Feedforward Control of the Expression of Folate Biosynthesis Genes in Tomato Fruit

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Molecular Plant 2010年第1期3卷 66-77页

作者： Jeffrey C. Wallera Tariq A. Akhtar Aurora Lara-Nunez Jesse F. Gregory lli Ryan R McQuinn James J. Giovannoni andrew d. hanson Horticultural Sciences department University of Florida Gainesville FL 32611 USA Food Science and Human Nutrition department University of Florida Gainesville FL 32611 USA United States department of Agriculture-Agricultural Research Service and Boyce Thompson Institute for Plant Research Ithaca NY 14853 USA

Little is known about how plants regulate their folate content, including whether the expression of folate biosynthesis genes is orchestrated during development or modulated by folate levels. Nor is much known about how folate levels impact the expression of other genes. These points were addressed using wild-type tomato fruit and fruit engineered for high folate content. In wild-type fruit, the expression of genes specifying early steps in folate biosynthesis declined during development but that of other genes did not. In engineered fruit overexpressing foreign GTP cyclohy- drolase I and aminodeoxychorismate synthase genes, the expression of the respective endogenous genes did not change, but that of three downstream pathway genes--aminodeoxychorismate lyase, dihydroneopterin aldolase, and mitochondrial folylpolyglutamate synthase--respectively increased by up to 7.8-, 2.8-, and 1.7-fold, apparently in response to the build-up of specific folate pathway metabolites. These results indicate that, in fruit, certain folate pathway genes are developmentally regulated and that certain others are subject to feedforward control by pathway intermediates. Micro- array analysis showed that only 14 other transcripts （of 11 000 surveyed） increased in abundance by two-fold or more in high-folate fruit, demonstrating that the induction of folate pathway genes is relatively specific.

关键词： Folate biosynthesis fruit development metabolic engineering transcript profiling.

Timing and setting of Guan-jiagou conglomerate in South Qinling and their tectonic im-plications

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Chinese Science Bulletin 2004年第16期49卷 1722-1729页

作者： YANQuanren A.d.hanson WANGZongqi P.A.druschkel YANZhen WANGTao LUHaifeng InstituteofGeology.ChineseAcademyofGeologicalSciences Beijing100037China departmentofGeosciences UniversityofNevadaLasVegasLasVegas454010NV89154USA InstituteofGeologyandGeophysics ChineseAcademyofSciencesBeijing100029China

Located in the southern Qinling Mountains of central China, the Guanjiagou Formation has been a con-troversial issue with regard to its depositional age and tec-tonic implications. Being comprised of an approximately 2050 m thick succession of texturally and compositionally immature, presumed marine turbiditic sandstones and con-glomerate, the Guanjiagou Formation consists of an overall prograding- and coarsening-upward megasequence. Al-though bounded by faults on both its northern and southern margins, it is weakly metamorphosed and deformed. To the north is the devonian Sanhekou Group and to the south is the Neoproterozoic Hengdan Group. The lower portion of the sequence contains granitic and volcanic clasts (Guanjiagou conglomerate). The feldspars from these clasts were dated using the 40Ar/39Ar method. Two cooling ages of 219.690.49 and 216.460.59 Ma, for K-feldspar from a granitic clast and plagioclase from a volcanic clast, respectively, were obtained. These ages are identical to the time of regional igneous ac-tivities (ca. 240—220 Ma) and are interpreted as the prod-ucts of magmatism associated with collision in the Qinling orogenic belt in the Early Mesozoic, suggesting that the Guanjiagou Formation was deposited in the Norian of the Late Triassic, ca. 220 Ma. Therefore, 40Ar/39Ar and sedimen-tary analyses suggest that the Guanjiagou Formation con-tains sediments that may have filled in a remnant ocean ba-sin, which might be part of the Anyemaqen-Mianle ocean, or Tethys on the southern side of Central Orogenic Belt in China during the Late Paleozoic to Early Mesozoic.

关键词：关家沟成因 ^40Ar/^39Ar定年残余海洋盆地沉积年代构造意义

SHRIMP Age and Geochemistry of the Bikou Volcanic Terrane:Implications for Neoproterozoic Tectonics on the Northern Margin of the Yangtze Craton

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Acta Geologica Sinica(English Edition) 2003年第4期77卷 479-490页

作者： YANQuanren WANGZongqi A.d.hanson P.A.dRUSCHKE YANZhen LIUdunyi JIANPing SONGBiao WANGTao JIANGChunfa InstituteofGeology ChineseAcademyofGeologicalSciencesBeijing100037 departmentofGeosciences UniversityofNevadaLasVegasLasVegasNV89154-4010USA InstituteofGeologyandGeophysics ChineseAcademyofSciencesBeijing100029

The Bikou volcanic terrane is predominated by subalkaline tholeiitic lavas. Rock samples display lower initial ratios of Sr and Nd, 0.701248-0.704413 and 0.511080-0.512341 respectively. 207Pb and 208Pb are significantly enriched in the lavas. Most samples have positive εNd, which indicates that the magma was derived from EM-type mantle source, while a few samples with negative εNd indicate that there was contamination in the magma evolution. Magma differentiation is demonstrated by variations of LREE and LILE from depletion to enrichment. Additionally, normalized REE patterns and trace elements showed that lavas from the Bikou volcanic terrane have similar characteristics to those of basalts in arc settings caused by subduction and collision. Analyses showed that the Bikou volcanic terrane is a volcanic arc. New evidence proved that the Hengdan Group, north of the Bikou arc, is a turbidite terrane filling a forearc basin. Consequently, the Bikou volcanic terrane and the Hengdan turbidite terrane construct an arc-basin system. New SHRIMP ages showed that this arc-basin system developed on the northern margin of the Yangtze craton in the Neoproterozoic (846-776 Ma), and this arc-basin system is in agreement with the tectonic processes of Rodinia in the Neoproterzoic.

关键词： geochemistry Sr-Nd-Pb isotopes SHRIMP ages Bikou Volcanic Terrane southwestern Qinling Mts. Yangtze Craton Rodinia

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基于目标寿命的存储器的快速分配和释放

软件 1990年第7期11卷 519-525页

作者： hanson,d 刘蕊红

Application of ^(14)N(d,α)^(12)C Nuclear Reaction to the Concentration Analysis of Nitrogen in Iron Meteorites

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Chinese Physics Letters 1995年第5期12卷 265-268页

作者： HU Beilai A.L.hanson K.W.Jones department of Physics Nankai UniversityTianjin 300071 Brookhaven National Laboratory UptonNew York 11973U.S.A.

The ^(14)N(d,α)^(12)C nuclear reaction has been used to measure the nitrogen content in iron *** analysis was made with 2.0MeV^(2)H^(+) beam from Brookhaven 3.5MV research electrostatic *** detection limits of about ... 详细信息

关键词： electrostatic beam