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简介：TheincidenceoflungcancerintheGejiuareaofYunnanProvinceranksthefirstintheworld.Theradonlevel(indoor,soil)wasmeasuredintheGejiuareabytheSSNTDmethodfrom1990to1996,Theresultindicatesanextensivehigh-levelofindoorradoninthatareathoughUandTharelowerinlocallimestones,Theindoorradonlevelofhouseslocatedinthegeologicfaultzoneis6timeshighthat2kmfarfromthefaultzone.Thereasonprobablyisthattheradonlevelofsoilinthefaultis6-8timeshighthat1kmfarfromthefaults.ourdataindicatethatalowerrangeofradonlevels,0-100Bq.m^-3,existsinhealthyfamilies.However,ahigherradonlevel,over800Bq.m^-3,isoftenfoundcorrespondingtothatofcancerpatients'homes(thehouse-ownersaresufferingfromeitherlungcancerorleukaemiaorlivercancer),Obviously,anincreaseinlungcancerincidencefollowsanincreaseinindoorradonlevel,Theriskofcancerinducedbyindoorradonisnolongeraninference,butafact.

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简介：Metalgrainsinstonymeteoritesarerelativelymovableduringthermalnetamorphism(Wood,1967;XieandWang,1979;Xie,1986).InviewofthefactthattheJilinmeteoriteisthelargestintheworldknownuptonow,itsmainbodyweighing1770kganditstotalvolumeamountingto117×93×84cm^3,ade-tailedinvestigationintosuchahugemeteoritebodywouldundoubtedlyprovideuswithalotofcluesandinformationvaluableinthestudyofthebehaviorofFe-Nimetalduringthermalmetamorphismofmeteorites.OurrecentinvestigationhasrevealedthatduringthermalmetamorphismoftheJilinchondirtefineFe-Nimetalparticlesmigratedeasilybydiffusioninsolidstate,andsubsequentlyaggregatedintometalnodulesabout5-10mminlength,andthelargestnodulewefoundis30mminsize(Photo1).Inthispaperwepresentsomenewresultsofourstudyconcerningthemigra-tionandconcentrationofFe-NimetalintheJilinchondriteonthebasisofop-tical,SEMobservationsandhigh-temperature-highpressureaswellasshockloadingexperiments.

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简介：健全生产的沙的主要元素作文第一次和稀土元素的元素(REE)和另外的选择元素被报导。在从在日本的Miyagi和Tottori的沙滩沙的稀土元素的元素集中被决定由联合正式就职，氩血浆spectrometry(ICPMS)到相对父母岩石描绘健全生产、沉默的沙的REE。健全生产的沙沙滩是很普通的并且在整个在在Miyagi的Japan:five沙滩并且2在区域与另外的沉默的沙沙滩在Tottori被选择。从Miyagi和Tottori的健全生产的沙和沉默的沙样品包含超过60wt%ofSiO_2并且主要由石英和长石组成。Miyagi沙样品被轻REE丰富和类似于本地来源沙岩的那些的完全使球粒状陨石正常化的模式描绘。然而，从在Miyagi的Miyatojima的所有沙样品显示出积极Eu异例，没在另外的沙显示出的一个典型特征从Miyagi取样。Tottori沙样品被高REE内容和显著积极Eu异例也描绘。包含lowerREE内容的沙由于高石英和长石内容。Miyatojima沙样品和Tottori沙样品有高REE内容并且由于长石的存在显示出显著积极Eu异例。最好的结果作为健全生产的沙和silents的类似的一项措施地质的方法和PrincipalComponent分析(PCA)用所有被获得并且。健全生产的沙和沉默的沙之间的差别从PCA结果被获得。

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