检索结果-南通市图书馆

Australasian microtektites across the Antarctic continent: Evidence from the Sør Rondane Mountain range (East Antarctica)

引用

Geoscience Frontiers 2021年第4期12卷 202-214页

作者： Bastien Soens Matthias van Ginneken Stepan Chernonozhkin Nicolas Slotte Vinciane Debaille frank vanhaecke Herman Terryn Philippe Claeys Steven Goderis Analytical Environmentaland Geo-ChemistryVrije Universiteit BrusselPleinlaan 2BE-1050 BrusselsBelgium Laboratoire G-Time UniversitéLibre de Bruxelles 50Av.F.D.Roosevelt CP 160/02BE-1050 BrusselsBelgium Centre for Astrophysics and Planetary Science University of KentCT27NZCanterburyKentUnited Kingdom Atomic&Mass Spectrometry–A&MS Research Unit Department of ChemistryGhent UniversityCampus SterreKrijgslaan 281–S12BE-9000 GhentBelgium Electrochemical and Surface Engineering Vrije Universiteit BrusselPleinlaan 2BE-1050 BrusselsBelgium

The~790 ka Australasian(micro)tektite strewn field is one of the most recent and best-known examples of impact ejecta emplacement as the result of a large-scale cratering event across a considerable part of Earth's surface(>10%in area).The Australasian strewn field is characterized by a tri-lobe pattern consisting of a large central distribution lobe,and two smaller side lobes extending to the west and ***,we report on the discovery of microtektite-like particles in sedimentary traps,containing abundant micrometeorite material,in the Sør Rondane Mountain(SRM)range of East *** thirty-three glassy particles display a characteristic pale yellowcolor and are predominantly spherical in shape,except for a single dumbbell-shaped *** vitreous spherules range in size from220 to 570μm,with an average diameter of~370μ*** compares relatively well with the size distribution(75–778μm)of Australasian microtektites previously recovered from the TransantarcticMountains(TAM)and located ca.2500–3000 km fromthe *** addition,the chemical composition of the SRM particles exhibits limited variation and is nearly identical to the‘normal-type’(i.e.,<6%MgO)TAM *** Sr and Nd isotope systematics for a single batch of SRM particles(n=26)strongly support their affiliation with TAMmicrotektites and the Australasian tektite strewn field in ***,Sr isotope ratios and Nd model ages suggest that the target material of the SRM particles was composed of a plagioclase-or carbonate-rich lithology derived from a Paleo-or Mesoproterozoic crustal *** affiliation to the Australasian strewn field requires long-range transportation,with estimated great circle distances of ca.11,600 km from the hypothetical source crater,provided transportation occurred along the central distribution *** is in agreement with the observations made for the Australasian microtektites recovered from Victoria Land(ca.11,000 km)and Larkman Nunatak(ca.12,000 km),w

关键词： Impact cratering Impact ejecta Target stratigraphy Volatilization Antarctica Microtektites

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Resolving impact volatilization and condensation from target rock mixing and hydrothermal overprinting within the Chicxulub impact structure

引用

Geoscience Frontiers 2022年第5期13卷 16-31页

作者： Thomas Déhais Stepan M.Chernonozhkin Pim Kaskes Sietze J.de Graaff Vinciane Debaille frank vanhaecke Philippe Claeys Steven Goderis Analytical Environmental and Geo-ChemistryVrije Universiteit BrusselBrusselsBelgium Laboratoire G-Time UniversitécLibre de BruxellesBrusselsBelgium Department of Chemistry Atomic&Mass SpectrometryGhent UniversityGhentBelgium

This work presents isotopic data for the non-traditional isotope systems Fe,Cu,and Zn on a set of Chicxulub impactites and target lithologies with the aim of better documenting the dynamic processes taking place during hypervelocity impact events,as well as those affecting impact structures during the post-impact *** focus lies on material from the recent IODP-ICDP Expedition 364 Hole M0077A drill core obtained from the offshore Chicxulub peak *** ejecta blanket samples from the UNAM 5 and 7 cores were used to compare the crater lithologies with those outside of the impact *** datasets of bulk Fe,Cu,and Zn isotope ratios are coupled with petrographic observations and bulk major and trace element compositions to disentangle equilibrium isotope fractionation effects from kinetic *** observed Fe and Cu isotopic signatures,with δ^(56/54)Fe ranging from0.95‰to 0.58‰and δ^(65/63)Cu from0.73‰to 0.14‰,mostly reflect felsic,mafic,and carbonate target lithology mixing and secondary sulfide mineral formation,the latter associated to the extensive and long-lived(>105 years)hydrothermal system within Chicxulub *** the other hand,the stable Zn isotope ratios provide evidence for volatility-governed isotopic *** heavier Zn isotopic compositions observed for the uppermost part of the impactite sequence and a metamorphic clast(δ^(66/64)Zn of up to 0.80‰and 0.87‰,respectively)relative to most basement lithologies and impact melt rock units indicate partial vaporization of Zn,comparable to what has been observed for Cretaceous-Paleogene boundary layer sediments around the world,as well as for tektites from various strewn *** contrast to previous work,our data indicate that an isotopically light Zn reservoir(δ^(66/64)Zn down to0.49‰),of which the existence has previously been suggested based on mass balance considerations,may reside within the upper impact melt rock(UIM)*** observation is restricted to a few UIM sampl

关键词： Chicxulub impact structure Non-traditional stable isotopes Impact volatilization Impact condensation Hydrothermal alteration Target lithology mixing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Electrochemically assisted production of biogenic palladium nanoparticles for the catalytic removal of micropollutants in wastewater treatment plants effluent

引用

Journal of Environmental Sciences 2023年第6期128卷 203-212页

作者： Cindy Ka Y Law Kankana Kundu Luiza Bonin Lorena Peñcoba-Antona Eduardo Bolea-Fernandez frank vanhaecke Korneel Rabaey Abraham Esteve-Nez Bart De Gusseme Nico Boon Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 653B-9000 GentBelgium Centre for Advanced Process Technology for Urban Resource recovery(CAPTURE) P.O.Frieda Saeysstraat 1B-9000 GentBelgium METfilter S.L. Autovía A49 Sevilla-Huelva Km 2841820 Carrión de los CéspedesSevillaSpain IMDEA Water Institute Av.Punto Com2Parque Científico Tecnológico28805 Alcaláde HenaresMadridSpain Atomic&Mass Spectrometry(A&MS)research group Department of ChemistryGhent UniversityCampus SterreKrijgslaan 281-S12B-9000 GhentBelgium Universidad de Alcalá Department of Analytical ChemistryPhysical Chemistry and Chemical EngineeringCtra.Madrid-Barcelona Km 33.60028871 Alcaláde HenaresMadridSpain

Biogenic palladium nanoparticles(bio-Pd NPs)are used for the reductive transformation and/or dehalogenation of persistent *** this work,H2(electron donor)was produced in situ by an electrochemical cell,permitting steered production of differently sized bio-Pd *** catalytic activity was first assessed by the degradation of methyl *** NPs showing the highest catalytic activity were selected for the removal of micropollutants from secondary treated municipal *** synthesis at different H2 flow rates(0.310 L/hr or 0.646 L/hr)influenced the bio-Pd NPs *** NPs produced over 6 hr at a lowH2 flow rate had a larger size(D50=39.0 nm)than those produced in 3 hr at a high H2 flow rate(D50=23.2 nm).Removal of 92.1%and 44.3%of methyl orange was obtained after 30 min for the NPs with sizes of 39.0 nm and 23.2 nm,***-Pd NPs of 39.0 nm were used to treat micropollutants present in secondary treated municipal wastewater at concentrations ranging fromμg/L to ng/*** removal of 8 compounds was observed:ibuprofen(69.5%)94.3%)90%***,these data indicate that the size,and thus the catalytic activity of the NPs can be steered and that the removal of challengingmicropollutants at environmentally relevant concentrations can be achieved through the use of bio-Pd NPs.

关键词： Antibiotics Adsorption Biogenic palladium nanoparticles Catalytic activity H2 Secondary treated municipal wastewater

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

北京大气PM_(2.5)中铅的同位素测定和来源研究

引用

环境科学 2006年第3期27卷 401-407页

作者：李显芳刘咸德李冰董树屏刘锋 Veerle VanLierde frank vanhaecke 中国环境科学研究院国家地质实验测试中心北京100037 国家环境分析测试中心北京100029 根特大学核科学研究所

用石英滤膜连续采集北京2003—02～2003—03的12个PM2．5样品，进行无机多元素、OC、EC和铅同位素丰度比的分析测定．对样品进行聚类分析，结合气象信息讨论了分组结果，描述了2003年春北京市的2个大气铅污染过程．2个污染过程均表现出... 详细信息

用石英滤膜连续采集北京2003—02～2003—03的12个PM2．5样品，进行无机多元素、OC、EC和铅同位素丰度比的分析测定．对样品进行聚类分析，结合气象信息讨论了分组结果，描述了2003年春北京市的2个大气铅污染过程．2个污染过程均表现出铅含量高，^206Pb／^207Pb丰度比低的特点．Al、Ca、K等地壳元素的含量与Pb的含量负相关，表明土壤尘对铅的贡献不大．比较Pb、A5、Zn、Se和Al、Ca等地壳元素含量的相关性，2个铅污染过程是由有色冶金排放和燃煤排放共同主导的．而02—28～03-02的铅污染过程中，燃煤排放贡献增大，有色冶金排放贡献下降．结果表明，汽油无铅化以后，北京市春季大气颗粒物中的铅主要来源于有色冶金排放与燃煤排放。

关键词：铅大气颗粒物同位素丰度比

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国北京和长岛大气颗粒物中铅的同位素丰度比测定(英文)

引用

岩矿测试 2005年第1期24卷 7-12页

作者：李冰刘咸德董树屏 Veerle Van Lierde frank vanhaecke Freddy C Adams 国家地质实验测试中心北京100037 中国环境科学研究院北京100012 国家环境分析测试中心北京100029 Laboratory of Analytical Chemistry Ghent University University of Antwerp UIAB 2610Wilrijk AntwerpenBelgium

采用高分辨电感耦合等离子体质谱技术(HRICPMS)分析了48个不同季节大气气溶胶颗粒样品中铅同位素丰度(A)比值,为中国城市铅污染源研究提供数据。样品采自中国北京和山东长岛地区(2002～2003年期间不同季节)。A(206Pb/207Pb)和A(208Pb/20... 详细信息

采用高分辨电感耦合等离子体质谱技术(HRICPMS)分析了48个不同季节大气气溶胶颗粒样品中铅同位素丰度(A)比值,为中国城市铅污染源研究提供数据。样品采自中国北京和山东长岛地区(2002～2003年期间不同季节)。A(206Pb/207Pb)和A(208Pb/207Pb)的10次测定精密度为0.05%～0.19%RSD。

关键词：电感耦合等离子体质谱大气颗粒物铅同位素丰度比

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高分辨电感耦合等离子体质谱法测定大气气溶胶中铅同位素比值(英文)

高分辨电感耦合等离子体质谱法测定大气气溶胶中铅同位素比值(英...

引用

中国质谱学会第七届会员代表大会暨学术报告会

作者：李冰刘咸德董树屏 Veerle Van Lierde frank vanhaecke Freddy.C.Adams 国家地质实验测试中心中国环境科学研究院国家环境分析测试中心 Laboratory of Analytical Chemistry Ghent UniversityInstitute for Nuclear SciencesProeftuinstraat 86B-9000 GhentBelgium University of Antwerp UIAB-2610Wilrijk-AntwerpenBelgium

采用高分辨电感耦合等离子体质谱技术(HR-ICP-MS)分析了48个不同季节大气气溶胶颗粒样品中铅同位索比值,为中国城市铅污染源研究提供数据。样品采至中国北京和长岛地区(2002年～2003年期间)。Pb/Pb和Pb/Pb的10次测定标准偏差为0.05%～0.... 详细信息

采用高分辨电感耦合等离子体质谱技术(HR-ICP-MS)分析了48个不同季节大气气溶胶颗粒样品中铅同位索比值,为中国城市铅污染源研究提供数据。样品采至中国北京和长岛地区(2002年～2003年期间)。Pb/Pb和Pb/Pb的10次测定标准偏差为0.05%～0.19%。

关键词：高分辨电感耦合等离子体质谱大气气溶胶铅同位素分析

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Decoding complexity: the need to enhance precision and streamline spatial understanding in neuroscience

引用

Neural Regeneration Research 2025年第3期20卷 801-802页

作者： Sameehan Mahajani Armita Salahi Brenda Gonzalez Charlotte Nelson frank Hsiung Biology&Applications Division NodexusSan JoseCAUSA

Neuroscience is the ultimate frontier in our quest for a comprehensive understanding of human behavior. Since its launch in 2009, the Human Connectome Project has emerged as a pioneering force, making heroic strides i... 详细信息

关键词： behavior frontier dating

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

From basic properties to the Mott design of correlated delafossites

引用

npj Computational Materials 2021年第1期7卷 1084-1100页

作者： frank Lechermann European XFEL SchenefeldGermany Center for Computational Quantum Physics Flatiron InstituteNew YorkNYUSA

The natural-heterostructure concept realized in delafossites highlights these layered *** metallic,band-or Mott-insulating character may be associated with individual layers,inter-layer coupling still plays a decisive *** review the correlated electronic structure of PdCoO_(2),PdCrO_(2),and AgCrO_(2),showing that layer-entangled electronic states can deviate from standard classifications of interacting *** finding opens up possibilities for materials design in a subtle Mott-critical *** Hidden-Mott physics,correlation-induced semimetallicity,or Dirac/flat-band dispersions in a Mott background are emerging *** with achievements in the experimental preparation,this inaugurates an exciting research field in the arena of correlated materials.

关键词： materials metallic showing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnesium research in Canada:Highlights of the last two decades

引用

Journal of Magnesium and Alloys 2023年第10期11卷 3484-3510页

作者： frank Czerwinski Natural Resources Canada CanmetMATERIALSHamiltonONCanada

The highlights of major Canadian research projects of last two decades that aimed at advancing applications of magnesium and its alloys,being at the heart of lightweighting and ecological sustainability, are outlined. The research at universities, government laboratories, and other dedicated institutions, funded primarily through federal programs, was accompanied by strong activities of the industrial sector involved in designing and building the machinery for magnesium processing and production of components from magnesium alloys. The overall research directions matched the global trends of overcoming the key challenges that prevent magnesium alloys to play the major role in large-scale applications. Among industrially oriented projects the processing technologies in liquid, semisolid and solid states such as casting, twin roll casting, injection molding, rolling, extrusion, forging, and joining techniques were frequently pursued. Although the fundamental research aimed at understanding of a variety of magnesium behaviors and structural peculiarities up to nano and atomic levels, its essence spread around the inherently poor formability and high reactivity at room and elevated temperatures, including the ignition/flammability *** recent years, a shift in research interests was observed and novel directions emerged such as magnesium air batteries, biodegradable alloys, additive manufacturing, and magnesium-rich high entropy alloys. The volume of data gathered in this report may constitute a base for specifically oriented assessments, analyses, and drawing conclusions.

关键词： Magnesium Magnesium alloys Processing technologies Canadian research projects

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ultra-broadband access enabled by fiber optics(Invited Paper)

引用

Chinese Optics Letters 2016年第12期14卷 17-20页

作者： frank Effenberger Futurewei Technologies Bridgewater NJ 08807 USA

The advent of low loss optical fiber has consistently led us to the ultra-broadband era, where bandwidths exceeding 1 Gb/s are commonplace. This Review reviews the early history of fiber access, pointing out some of the lasting design choices and signature features of fiber access. The progress of the various passive optical network technologies is also reviewed, and some views regarding the future trends of fiber in the access.

关键词： broadband consistently optics pointing signature lasting exceeding deployment bandwidth enabled

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：