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51篇 您的检索式:作者名="Ronald T B"
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1都兰花岗岩锆石SHRIMP定年及柴北缘超高压带花岗岩年代学格架显示文摘柴北缘超高压带东端都兰地区花岗岩锆石SHRIMP U-Pb定年结果表明,野马滩东岩体的年龄为(406.6±3.5)Ma,巴立给哈滩西岩体的年龄分别为(407.3±4.3)和(397±6)Ma,水文站北岩体的年龄分别为(404.5±4.0)和(397.0±3.7)Ma,水文站南岩体的年龄为(380.5±5.0)Ma,察察公麻岩体的年龄分别为(382.5±3.6)和(372.5±2.8)Ma.从年龄上看,这些花岗岩明显地分为两期:早期的为407-397 Ma,晚期的为383-373 Ma.它们主要为准铝质-弱过铝质的石英闪长岩、花岗闪长岩和二长花岗岩.岩石地球化学研究表明,大多数样品为钙碱性系列,少数样品为钙性或碱钙性系列,其中,早期花岗岩的87Sr/86Sr比值(0.7082-0.7110)和模式年龄(T2DM=1.41-1.90 Ga)高于晚期花岗岩(0.7072-0.7091,T2DM=1.07-1.38 Ga),但晚期花岗岩的εNd(t)值(0.6- -3.0)高于早期花岗岩(-3.2- -9.3),表明早期花岗岩可能起源于早中元古代的大陆壳;而晚期花岗岩起源于晚中元古代玄武质地壳.结合区域地质构造特征,可以认为,早期花岗岩的形成与俯冲板块的断离并折返有关,而晚期花岗岩的形成与造山带岩石圈地幔拆沉作用有关.吴才来 郜源红 李兆丽 雷敏 秦海鹏 李名则 刘春花 Ronald B FROST Paul T ROBINSON Joseph L WOODEN 2014中国科学:地球科学2014,44,10:27
2Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China显示文摘Zircon SHRIMP dating of granites from Dulan,east segment of North Qaidam UHP belt shows that they are 406.6±3.5 Ma for Yematan-E,407.3±4.3 and 397±6 Ma for Balijiehatan-W,404.5±4.0 and 397.0±3.7 Ma for Shuiwenzhan-N,380.5±5.0 Ma for Shuiwenzhan-S,382.5±3.6 and 372.5±2.8 Ma for Chachagongma.These granites from Dulan represent the products of the third and fourth periods of Paleozoic magmatism in North Qaidam.Geochemically,the granitoids with metalumious to weak peratuminous are quartz diorite,granodiorite,and granite in composition and mainly belong to calc-alkaline series,a few samples to calc or alkali-calc series.The third period of granites is a rock association of granodiorite+granite,with initial 87Sr/86Sr ratios from 0.7082 to 0.7110 and T2DM model ages from 1.41–1.90 Ga;and the fourth period of granites is a rock association of quartz diorite+granodiorite+granite,with initial 87Sr/86Sr ratios from 0.7072 to 0.7091 and T2DM model ages from 1.07–1.38 Ga.Therefore,the third period of granites has higher initial 87Sr/86Sr ratios and T2DM model ages.On the contrary,the fourth period of granites has Nd(t)values from 0.6 to-3.0,higher than that of the third granite with Nd(t)values-3.2 to-9.3.Thus,the data comparison indicates that the third granites may derive from Paleo-proterzoic continental crust with mantle material whereas the fourth granites may derive from the Meso-proterzoic basalt crust with continental material.Combined with regional geology,we thought that the third granites were formed relative to plate exhumation and the fourth granites to delamination of the lithospheric mantle.WU CaiLai GAO YuanHong LI ZhaoLi LEI Min QIN HaiPeng LI MinZe LIU ChunHua Ronald B FROST Paul T ROBINSON Joseph L WOODEN 2014Science China Earth Sciences2014,57,12:21
3Chemical and pharmacological evaluation of Hypericum perforation extracts显示文摘KEY WORDS Hypericum perforation; High pressure liquid chromatography; serotonin uptake inhibitors; tree radicals; antioxidants; hyperforin; hypericin; quercetin; rutinABSTRACTAIM: To determine the concentrations of chemical characteristic to extracts of leaves and flowers of Hypericum perforatnm (St John’s wort) in a number of selected samples and, following chemical characterization, to investigate the effects of these extracts on several pharmacological properties including effects of the extracts on inhibition of 5-hydroxytryptamine (5-HT) uptake and on an-tioxidant properties. METHODS: The samples were analyzed for the presence of characteristic chemicals by high performance liquid chromatography (HPLC) directly coupled to ultraviolet wavelength absorbance and positive or negative mode electrospray mass spectrometric detection. The effects of extracts on 5-HT uptake were determined by quantifying 3H-5-HT incorporation into rat hip-pocampal prisms. Estimates of effects of extracts on free radicalB Duff SLOLEY Liana J URICHUK LING Lei GU Lie-Dong Ronald T COUTTS Peter K T PANG Jacqueline J SHAN 2000Acta Pharmacologica Sinica2000,21,12:2
4Hyperspectral vegetation indices and their relationship with agricuhural crop characteristics 显示文摘PRASD S T RONALD B S EDDY D P 2000Remote Sensing Environment2000,71,2:1
5Floristic development patterns in a restored Elk River Estuarine Marsh, Grays Harbor, Washington显示文摘Ronald M T Robert Z Amy B B 2002Restoration Ecology2002,10,3:1
6An analysis of mass casualty incidents in the setting of mass gatherings and special events 显示文摘Sheila A T Adam L Ronald R B 2014Disaster Med Public Health Prep2014,7,1:1
7Constructed wetlands as re- circulation filters in large-scale shrimp aquaculture显示文摘DAVID R T HARISH B RONALD R AquaculturaI En- gineering0,26,:1
8Simple chemical transformation of lignocellulosic biomass into furans for fuels and chemicals 显示文摘JOSEPH B BINDER RONALD T 2009Journal of the American Chemical Society2009,131,5:1
9Fermentable sugars by chemi-cal hydrolysis of biomass显示文摘Joseph I3 B Ronald T R 2010Proc Natl Acad Sci USA2010,107,:1
10Hepatofugal Flow in the Portal Venous System: Pathophysiology, Imaging Findings, and Diagnostic Pitfalls 显示文摘Ronald H Phillip B Constantine T 2002RadioGraphics2002,22,1:1
11A receptor kinase-like protein encoded by the rice disease resistance gene,Xa21显示文摘 Wang G L Chen L L Kim H S Pi L Y Holsten T Gardner J Wang B Zhai W X Zhu L H Fanquet C Ronald P C 1995Science1995,270,:1
12Hyperspectral vegetation indices and their relationships with agri- cultural crop characteristics显示文摘Prasad S T Ronald B S Eddy D P 2000Remote Sensing of Environment2000,71,:1
13Constructed wetland as recirculation filters in large-scale shrimp aquaculture 显示文摘 Harish B Ronald R 2002Aquacultural Engineering2002,26,2:1
14Structure determination of pentacyclic pyridoacridine alkaloids from the Australian marine organisms Ancorina geodides and Cnemidocarpa stolonifera 显示文摘Trong D T Ngoc B P Ronald J Q 2014Eur J Org Chem2014,22,:1
15Floristic development pat terns in a restored Elk River Estuarine Marsh, Grays Harbor, Washington显示文摘Ronald M T Robert Z Amy B B 2002Restoration Ecology2002,10,:1
16Hyperspectral vegetation indices and their relationships with agricultural crop characteristics显示文摘Prasad S T Ronald B S Eddy D P 2000Remote Sensing of Environment2000,71,:1
17An inventory model for delayed customization:a hybrid approach显示文摘Ronald S T Yehuda B 2005European Journal of Operational Research2005,165,:1
18Market seg- mentation: group versus individual behavior显示文摘FRANK B DOUGLAS J T RONALD T L 1968Journal of Marketing Research1968,5,3:1
19A receptor kinase-like protein encoded by the rice disease resistance gene, Xa 21显示文摘Song W Y Wang G L Chen L L Kim H S Pi L Y Holsten T Gardner J Wang B Zhai W X Zhu L H Fauquet C Ronald P 1995Science1995,270,5243:1
20A receptor linase--like protein encoded by the rice disease resisance gene, Xa21显示文摘Song WY Wang GL Chen LL Kim HS Pi LY Holsten T Gardner J Wang B Zhai WX Zhu LH Fauquet C Ronald P 1995Science1995,270,:1
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