Artisanal ceramic factories using wood combustion:A nanoparticles and human health study     

Kátia Martinello  James C.Hower  Diana Pinto  Carlos E.Schnorr  Guilherme L.Dotto  Marcos Leandro Silva Oliveira  Claudete G.Ramos 《地学前缘(英文版)》2022,(1):488-497

The ceramics industry,resulting from developments of modern compounds,is a segment of great influence in worldwide sustainability.Artisanal ceramic factories based on wood combustion have significant risks for the creation and discharge of atmosphere nanoparticles(NPs)and ultra-fine particles(UFPs).At present,there is insufficient recognition on the influence of engineered-NPs on the atmosphere and health.Real improvements are indispensable to diminish contact with NPs.The present study demonstrates the main NPs and UFPS present in an area of intense artisanal wood-combustion ceramic manufacturing.Particulate matter was sampled for morphological,chemical,and geochemical studies by sophisticated electron microbeam microscopy,X-Ray Diffraction,and Raman spectroscopy.From NPs configuration(<10 nm)we identify nucleation.Several amorphous NPs(>10 nm)were produced around the studied artisanal ceramic factories.This study presents an indication of the recent information on population and work-related contact to NPs in the artisanal ceramic factories and their influence on health.  相似文献   

The use of soil geochemistry to map tectonic assemblages: Case study based on the Tellus Survey, Northern Ireland     

McKinley  J.M.  Grunsky  E.C.  Mueller  U.A. 《《地质学报》英文版》2018,92(Z1):158-158

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From the editors: special issue announcement     

George C. Lee 《地震工程与工程振动(英文版)》2008,7(3):I0001-I0001

During the past several months, we have been considering "Special Issues" on a variety of topics for the journal of Earthquake Engineering and Engineering Vibration. We are pleased to announce that the December 2008 issue will be  相似文献   

New Vertebrate Horizons in China     

C.C.YOUNG 《地质学报》1937,(Z1)

INTRODUCTION Studies on vertebrate palaeontology in China were begun in the lastone and a half decade.Before the year 1920 fossil bones such as thosedescribed by Owen,Lydekker,Koken,Schlosser and others were mostlycollected in an indirect way,that is to say,from Chinese pharmacy  相似文献   

http://www.sciencedirect.com/science/article/pii/S1674987111001125   总被引：1，自引：1，他引：0  

C. Manikyam  Robert Kerrich 《地学前缘(英文版)》2012,3(3):225-240

<正>Greenstone belts of the eastern Dharwar Craton,India are reinterpreted as composite tectonostratigraphic terranes of accreted plume-derived and convergent margin-derived magmatic sequences based on new high-precision elemental data.The former are dominated by a komatiile plus Mg-tholeiitic basalt volcanic association,with deep water siliciclastic and banded iron formation(BIF) sedimentary rocks.Plumes melted at90 km under thin rifted continental lithosphere to preserve inlraoceanic and continental margin aspects.Associated alkaline basalts record subduction-recycling of Mesoarchean oceanic crust,incubated in the asthenosphere.and erupted coevally with Mg basalts from a heterogeneous mantle plume.Together.komaliites-Mg basalts-alkaline basalts plot along the Phanerozoic mantle array in Th/Yb versus Nb/Yb coordinate space,representing zoned plumes,establishing that these reservoirs were present in the Neoarchean mantle. Convergent margin magmatic associations are dominated by tholeiitic to calc-alkaline basalts eompositionally similar to recent intraoceanic arcs.As well,boninitic flows sourced in extremely depleted mantle are present,and the association of arc basalts with Mg-andesites-Nb enriched basalts-adakites documented from Cenozoic arcs characterized by subduction of young(20 Ma),hot,oceanic lithosphere. Consequently.Cenozoic style "hot" subduction was operating in the Neoarchean.These diverse volcanic associations were assembled to give composite terranes in a subduction-accretion orogen at～2.1 Ga,coevally with a global accretionary orogen at ~2.7 Ga,and associated orogenic gold mineralization. Archean lithospheric mantle,distinctive in being thick,refractory,and buoyant,formed complementary to the accreted plume and convergent margin terranes.as migrating arcs captured thick plumeplateaus. and the refractory,low density.residue of plume melting coupled with accreted imbricated plume-arc crust.  相似文献   

洋盆封闭后我们有时所忽视的东西:以澳大利亚东部的显生宇为例(英文)     

Jonathan C.AITCHISON 《地球学报》2012,(Z1):1

The prevailing ’consensus’ explanation for Phanerozoic development of eastern Australia envisages a ’retreating accretionary orogen’ in which episodic slab retreat resulted in development of offshore island arcs in front of marginal basins.Periodically  相似文献   

Modeling the Newtonian dynamics for rotation curve analysis of thin-disk galaxies     

James Q.Feng  C.F.Gallo 《中国天文和天体物理学报》2011,(12)

We present an efficient,robust computational method for modeling the Newtonian dynamics for rotation curve analysis of thin-disk galaxies.With appropriate mathematical treatments,the apparent numerical difficulties associated with singularities in computing elliptic integrals are completely removed.Using a boundary element discretization procedure,the governing equations are transformed into a linear algebra matrix equation that can be solved by straightforward Gauss elimination in one step without further ...  相似文献   

隧道工程与非开挖技术的国际精品课程     

Juan  Carlos  Gutierrez  John  C.  Matthews  赵民译 《岩土钻凿工程》2014,(2):75-81

考虑到在这些缺乏技术经验的国家,在实施和利用地下基础设施技术方面,教育是基本的方法,作者针对隧道及非开挖技术在国际上的使用设计了一个精品课程。该课程将覆盖传统隧道的主要设计原则,随后向学生介绍非开挖技术的基本设计原则。在专门设计练习中,作者通过使用MathCad and MS Excel来补充课程的最后一章节。最后的结果是：为在地下基础设施建设富有经验和参与不同地下工程规划、设计的工程师量身定做的一节48小时的密集课程。本课程将提供给超过五个土木工程系的麦德林、哥伦比亚的几所大学。  相似文献   

http://www.sciencedirect.com/science/article/pii/S1674987113000388     

D.C.Mishra  M.Ravi Kumar 《地学前缘(英文版)》2014,5(1):25-41

The AravallieDelhi and Satpura Mobile Belts(ADMB and SMB)and the Eastern Ghat Mobile Belt(EGMB)in India form major Proterozoic mobile belts with adjoining cratons and contemporary basins.The most convincing features of the ADMB and the SMB have been the crustal layers dipping from both sides in opposite directions,crustal thickening(w45 km)and high density and high conductivity rocks in upper/lower crust associated with faults/thrusts.These observations indicate convergence while domal type refectors in the lower crust suggest an extensional rifting phase.In case of the SMB,even the remnant of the subducting slab characterized by high conductive and low density slab in lithospheric mantle up to w120 km across the PurnaeGodavari river faults has been traced which may be caused by fuids due to metamorphism.Subduction related intrusives of the SMB south of it and the ADMB west of it suggest NeS and EeW directed convergence and subduction during MesoeNeoproterozoic convergence.The simultaneous EeW convergence between the Bundelkhand craton and Marwar craton(Western Rajasthan)across the ADMB and the NeS convergence between the Bundelkhand craton and the Bhandara and Dharwar cratons across the SMB suggest that the forces of convergence might have been in a NEeSW direction with EeW and NeS components in the two cases,respectively.This explains the arcuate shaped collision zone of the ADMB and the SMB which are connected in their western part.The Eastern Ghat Mobile Belt(EGMB)also shows signatures of E eW directed MesoeNeoproterozoic convergence with East Antarctica similar to ADMB in north India.Foreland basins such as Vindhyan(ADMBeSMB),and Kurnool(EGMB)Supergroups of rocks were formed during this convergence.Older rocks such as Aravalli(ADMB),MahakoshaleBijawar(SMB),and Cuddapah(EGMB)Supergroups of rocks with several basic/ultrabasic intrusives along these mobile belts,plausibly formed during an earlier episode of rifting during PaleoeMesoproterozoic period.They are highly disturbed and deformed due to subsequent MesoeNeoproterozoic convergence.As these Paleoproterozoic basins are characterized by large scale basic/ultrabasic intrusives that are considerably wide spread,it is suggested that a plume/superplume might have existed under the Indian cratons at that time which was responsible for the breakup of these cratons.Further,the presence of older intrusives in these mobile belts suggests that there might have been some form of convergence also during Paleoproterozoic period.  相似文献   

关于西阿翼龙系统位置的简单注释及与其它翼龙类关系的评论     

Bruno C. VILA NOVA  Alexander W. A. KELLNER  Juliana M. SAY?O 《地球学报》2010,31(Z1):73-75

Cearadactylus atrox is one of the first pterosaurs unearthed from the Araripe Basin (Northeast Brazil) (Leonardi and Borgomanero 1983, 1985) (Fig.1). The fossil was preserved in a calcareous concretion typical of the Romualdo Formation and comprised an almost complete skull with lower jaw, but lacked the occipital region.  相似文献