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Phytochemical constituents and antibacterial efficacy of the flowers of Peltophomm pterocarpum(DC.) Baker ex Heyne

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Asian Pacific Journal of Tropical Medicine 2011年第9期4卷 735-738页

作者： Sukumaran S Kiruba S Mahesh M Nisha sr.Miller Paul Z Ben CP Jeeva S Centre for Biodiversity and Biotechnology Department of BotanyN.M.Christian College.Marthandam.Kanyakumari-629 165.Tamilnadu.India Department of Zoology Scott Christian College(Autonomous)NagercoilKanyakumari - 629 003.TamilnaduIndia Centre for Biodiversity and Biotechnology Department of BotanyN.M.Christian College.MarthandumKanyakumari - 629 165.TomilnaduIndia

Objective:To investigate the preliminary phytochemistry and antibacterial activity of the flower extract of Peltophorum ***:Phytochemical analysis was done by using the standard methods given by *** methanolic flower extract were tested against Escherichia coli,Klebsiella pneumonia,Pseudomonas *** aureus. Bacillus cereus,Salmonella typhi,Serratia marsecens,Acinetobacter *** sp., Proteus *** faecalis and Streptococcus pyogenes by the agar disc diffusion ***:Preliminary phytochemical screening of flower extract showed the presence of phenolic compounds,***,steroids,tannins,xanthoproteic,carboxylic acids, coumarins and *** flower extract of Peltophorum pteroearpum showed significant activity against four gram positive(Staphylococcus *** *** faecalis and Streptococcus pyogenes) and three gram negative bacteria(Proteus mirabilis,Acinetohacter baumannii and Serratia marsecens).out of 12 pathogenic bacteria ***:The findings of the present study confirm the presence of significant antibacterial activity against human pathogens in the flowers of Peltophorum pleracarpum.

关键词： Antibacterial activity Human pathogens Peltophorum pterocarpum Phytochemical screening

安徽铜陵地区幔源镁铁质团块研究及其地质意义

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地球学报 2014年第5期35卷 608-618页

作者：李大鹏杜杨松于学峰秦新龙 Steve scott 王树星 Filipa MARQUES 山东省地质科学研究院山东省金属矿产成矿地质过程与资源利用重点实验室山东济南250013 国土资源部金矿成矿过程与资源利用重点实验室山东济南250013 中国地质大学(北京) 北京100083 江苏省有色金属华东地质勘查局江苏南京210007 多伦多大学地质系海洋地质研究重点实验室山东省第八地质矿产勘查院山东日照276826 葡萄牙里斯本结晶学矿物学矿产资源研究中心

幔源岩石包体研究,是认识上地幔岩石圈物质组成、幔源岩浆演化及壳幔动力学过程的重要手段。铜陵地区小铜官山石英二长闪长岩中发育有微粒闪长质包体,并且这些微粒闪长质包体中不均匀地分布着镁铁质团块,三者的形成过程可视为铜陵地区... 详细信息

幔源岩石包体研究,是认识上地幔岩石圈物质组成、幔源岩浆演化及壳幔动力学过程的重要手段。铜陵地区小铜官山石英二长闪长岩中发育有微粒闪长质包体,并且这些微粒闪长质包体中不均匀地分布着镁铁质团块,三者的形成过程可视为铜陵地区岩浆演化的缩影,为了解本区深部岩浆作用过程提供了有力的证据。在前人研究的基础上,笔者借助电子探针、扫描电镜、电镜能谱和二次飞行时间离子探针（Tof-SIMS）对产于铜陵地区微粒闪长质包体中的镁铁质团块进行了详细的研究,首次获得了一套精确的矿物化学资料和元素分布图,总结了镁铁质团块的特征,并讨论了本区的深部岩浆作用过程。矿物学研究表明,镁铁质团块中的角闪石和辉石均已发生了不同程度的透闪石化和阳起石化蚀变,蚀变过程中,从镁钙闪石到镁角闪石,再到透闪石,随着Si的增加,角闪石呈现出Mg的富集和Ti、Al贫化的特点。团块中的富Cr磁铁矿、Ti磁铁矿和少量的铝直闪石指示了其具有深源性。Tof-SIMS元素分布图显示,透闪石主要由Al、Si、Ca、Sc、V、Cr、Mn、Cu和sr.素组成,透辉石主要由Si、Mg、Ca、Cu和Rb组成。在铜陵地区,上地幔部分熔融形成一套玄武岩浆,受岩浆底侵作用影响,玄武岩浆上侵,进入下地壳深位岩浆房,与下地壳硅镁层发生同化混染作用,形成一套轻度演化的中基性（辉长质）玄武岩浆,镁铁质团块就是这类中基性玄武岩浆直接结晶形成的。后受构造作用影响,这类中基性玄武岩浆上侵到中地壳岩浆房（12-16 km）,与中地壳的变质岩系发生同化混染和结晶分异作用形成一套中性闪长质岩浆,微粒闪长质包体就是这套闪长质岩浆发生结晶分异作用而形成的。镁铁质团块和微粒闪长质包体清楚地解释了铜陵地区深部岩浆作用过程,并有力地证明了铜陵地区中地壳的闪长质岩浆来源于下地壳的壳幔混源岩浆。

关键词：镁铁质团块闪长质包体壳幔相互作用 Tof-SIMS

Rb-sr.ISOTOPIC GEOCHRONOLOGY OF ARCHEAN ROCKS OF EASTERN HEBEI PROVINCE

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Chinese Science Bulletin 1988年第3期33卷 221-226页

作者：孙荣圭 RICHARD LEE ARMSTRONG KRISTA L.scott Department of Geofogy Peking University Departrnent of Geological Sciences University of British Columbia VancouverB. C. Canada V6T 2B4

The Archean rocks in this area were divided into two groups: the lower Qianxi Group including Shangchuan Formation and Santunying Formation, and the upper Badaohe Group including Wangchang Formation, Wanzhangzi Format... 详细信息

关键词： older predominantly volcanic eastern mantle representative Hebei mostly crustal dates

Wrangellia地体的钕和锶同位素特征及其对加拿大科迪勒拉地壳生长的意义

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地质科学译丛 1991年第3期8卷 46-53页

作者： scott D.Samson 申志军

本文报道取自出露于温哥华岛和Queen Charlotte岛的Wrangellia地体大多数主要岩体单元的样品Nd和sr.位素资料。初始∈_(Nd)值范围为+1.0～+7.3,初始^(87)sr.^(86)sr.化范围为0.70323～0.70481。这些比值类似于现代岛孤,并且表明了该... 详细信息

本文报道取自出露于温哥华岛和Queen Charlotte岛的Wrangellia地体大多数主要岩体单元的样品Nd和sr.位素资料。初始∈_(Nd)值范围为+1.0～+7.3,初始^(87)sr.^(86)sr.化范围为0.70323～0.70481。这些比值类似于现代岛孤,并且表明了该地体初始的没有经过演化的性质。这些资料说明,在增生至北美之前,Wrangellia可能处于洋内环境。与其它许多显生宙碎屑沉积岩相比,Wrangellia碎屑沉积岩Nd的地壳滞留年龄(平均T_(CR)=0.77±0.3Ga,T_(DM)=0.57±0.35Ga)更接近于它们的地层年龄,因此为该地体显生宙增生到北美大陆提供了有力的证据。在Wrangellia地体中早元古代地壳成分小于6％,因此,该地体是由94％的新的幔源地壳组成。Wrangellia新地壳的数量十分类似于已经确定的科迪勒拉另两个大地体——Alexander地体和Stikine地体。原始地体增生至大陆上可能是地壳生成的重要机制。

关键词：地体钕锶同位素地壳生长

Moving beyond Wastewater:Perspectives on Environmental Surveillance of Infectious Diseases for Public Health Action in Low-Resource Settings

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Environment & Health 2024年第10期2卷 684-687页

作者： Jeseth Delgado Vela Sarah E.Philo Joe Brown Mami Taniuchi Molly Cantrell Alexandra Kossik Maya Ramaswamy Sitara sr.Ajjampur Fatma Z.Guerfali Rochelle H.Holm John scott Meschke Maria Catherine B.Otero Amy J.Pickering Mahbubur Rahman Alexander G.Shaw Abhilasha Shrestha Kwanrawee Sirikanchana Vivi Maketa Tevuzula Rolf U.Halden Alexandria B.Boehm Kyle Bibby Department of Civil and Environmental Engineering Duke UniversityDurhamNorth Carolina 27710United States Department of Civil and Environmental Engineering and Earth Sciences University of Notre DameSouth BendIndiana 46556United States Department of Civil and Environmental Engineering University of Southern California Los AngelesCA 90007USA Department of Environmental Sciences and Engineering University of North Carolina at Chapel HillChapel HillNorth Carolina 27599United States Division of Infectious Diseases and International Health University of VirginiaCharlottesvilleVirginia 22903United States Waterborne Disease Prevention Branch U.S.Centers for Disease ControlAtlantaGeorgia 30329United States The Wellcome Trust Research Laboratory Christian Medical CollegeVellore 632004India Laboratory of Transmission Control and Immunobiology of Infections(LTCII)Institut Pasteur de TunisTunis-Belvédère 1002Tunisia UniversitéTunis El Manar Tunis 1002Tunisia Christina Lee Brown Envirome Institute School of MedicineUniversity of LouisvilleLouisvilleKentucky 40202United States Department of Environmental and Occupational Health Sciences School of Public HealthUniversity of WashingtonSeattleWashington 98195United States College of Medicine University of the Philippines ManilaManila 2801Philippines Department of Civil and Environmental Engineering University of CaliforniaBerkeleyBerkeleyCalifornia 94720United States Institute of Epidemiology Disease Control and Research(IEDCR)Dhaka 1212Bangladesh Department of Infectious Disease Epidemiology Imperial College LondonLondon SW72AZU.K. Division of Environmental and Occupational Health Sciences University of Illinois Chicago School of Public HealthChicagoIllinois 60612United States Research Laboratory of Biotechnology Chulabhorn Research InstituteBangkok 10210Thailand Department of Tropical Medicine University of KinshasaKinshasa/DR 63090201Congo School of Sustainable Engineering and the Built Environment Arizona State UniversityTempe

Although testing wastewater for public health surveillance has recently received significant attention in the United States,researchers and public health professionals have long realized the tremendous promise of environmental surveillance(ES),defined as tracking pathogens of interest in fecally contaminated surface waters,soil,or fomites,in low-resource settings for public health action.1,2 The power of ES in lowresource settings is most clearly illustrated with the over 30 years of well-established and standardized polio *** part of the Global Polio Eradication Initiative,the World Health Organization(WHO)has accredited 146 laboratories within the Global Polio Lab Network(GPLN).These facilities across 92 countries process over 8,000 wastewater or fecally contaminated surface water samples per year,in addition to over 220,000 stool samples annually.3 The data generated from the GPLN are closely linked to clear public health action related to targeted vaccination *** investment and adoption of ES for polio eradication efforts serves as a use-case for other targets of *** explore the current state of the field,the National Science Foundation-funded Research Coordination Network(RCN)on Wastewater Based Epidemiology for SARS-CoV-2 and Emerging Public Health Threats held a workshop in December 2023 to discuss the opportunities and challenges for ES in low-resource settings(Figure 1).Discussions during the workshop highlighted knowledge gaps,best-practices,target selection,academic/government/private partnerships and overall public health action and sustainability of these programs.

关键词： wastewater Wastewater annually

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幔源角闪石巨晶中硫化物熔融包裹体研究

地质学报 2012年第7期86卷 1091-1105页

作者：李大鹏杜杨松 S.D.scott 秦新龙 A.F.A.MARQUES R.N.S.SODHI 中国地质大学科学研究院北京100083 Scotiabank Marine Geology Research Laboratory Department of GeologyUniversity of Toronto22 Russell StreetTorontoCanada M5S 3B1 江苏省有色金属华东地质勘查局南京210007 CREMINER(LA/Isr. LisbonPortugal Surface Interface Ontario Dept.of Chemical Engineering&Applied ChemistryUniversity of TorontoCanada M5S 3E5

硫化物熔融包裹体研究是认识硫化物矿床成矿元素来源和演化的重要手段,由于硫化物熔融包裹体的体积较小(粒径仅为10～20μm),其详细化学元素组分的难以获得一直是制约进一步研究的瓶颈。笔者在前人研究的基础上,借助于扫描电镜、电镜能... 详细信息

硫化物熔融包裹体研究是认识硫化物矿床成矿元素来源和演化的重要手段,由于硫化物熔融包裹体的体积较小(粒径仅为10～20μm),其详细化学元素组分的难以获得一直是制约进一步研究的瓶颈。笔者在前人研究的基础上,借助于扫描电镜、电镜能谱和二次飞行时间离子探针(Tof-SIMS)对产于铜陵地区角闪石巨晶中的硫化物熔融包裹体进行了详细的研究,首次获得了一套精确的矿物化学资料和元素分布图。矿物学研究表明,角闪石巨晶在上地幔和下地壳均有结晶,温压区间分别为T:850～900℃(温度),P:0.70×109～0.82×109Pa(压力),对应深度D:23.10～27.06km;和T:900～950℃,P:1.09×109～1.17×109Pa,D:35.97～38.61km。元素分布图显示,硫化物熔融包裹体主要有两种元素组成体系:S-Fe-Mn-Ni-Rb-sr.Ba和S-Fe-Cu-sr.幔源硫化物体系中Mn、Ni、Rb、Ba等元素具有相似的性质特征可共溶,与Cu则表现出不混溶。在铜陵地区,上地幔的部分熔融形成了一套碱性玄武岩浆,后受岩浆底侵作用和壳幔相互作用影响,底侵进入下地壳深位岩浆房,发生结晶分异和同化混染作用,形成一套轻度演化的玄武岩浆,可能为辉长质。上地幔和下地壳的角闪石巨晶分别是由上地幔碱性玄武岩浆和下地壳轻度演化的玄武岩浆(辉长质)高压下结晶的产物。当上地幔碱性玄武岩浆上侵到下地壳深位岩浆房以后,发生结晶分异作用,又由于地壳硅镁层的混染作用,使得玄武岩浆中硫溶解度降低,促其熔离,从而释放大量的硫(S,以及Ni、Cu、Cr)。角闪石巨晶中的硫化物熔融包裹体正是在下地壳深位岩浆房中,由正在结晶的角闪石巨晶在结晶分异和轻度演化的玄武质岩浆中捕获的不混溶硫化物熔融液滴形成的。铜陵地区在中生代经历了一个长期的大规模的岩浆底侵作用和壳幔相互作用过程,由于下地壳硅镁层混染作用使得轻度演化的玄武岩浆释放大量硫,必然会在莫霍面附近形成大规模高浓度的硫富集区,这些组分在岩浆上侵作用、地壳减薄作用或者裂谷作用的影响下很容易再活化,进入区域岩浆-热液流体系统,最终参与形成区域大规模的硫化物矿床。

关键词：硫化物熔融包裹体上地幔硫化物岩浆底侵作用二次飞行时间离子探针(Tof-SIMS)

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冀东太古代岩石的Rb-sr.位素年代

科学通报 1986年第22期31卷 1725-1728页

作者：孙荣圭,Richard Lee Armstrong,Krista L. scott 北京大学地质学系加拿大不列颠·哥伦比亚大学地质科学系加拿大不列颠·哥伦比亚大学地质科学系

冀东太古代岩石分为下部迁西群(含上川组和三屯营组)和上部八道河群(含王厂组、湾杖子组和三门店组)。上川组以辉石麻粒岩为主;三屯营组为斜长片麻岩,含斜长角闪岩包体;王

关键词：太古代太古宙地质年代 Rb-sr 等时线年龄片麻岩变质岩麻粒岩相变质相变质事件等时线图全岩角闪岩闪岩区域变质岩辉石麻粒岩上川组三屯营组 sr 冀东岩石