STAZIONE DELL'ANTICA ET(?) DEL BRONZO AD OSTIANO(CREMONA),LOCALIT(?)SAN SALVATORE Nota preliminare sulla campagna dell'agosto 1980

The Early Bronze Age settlement at Ostiano S.Salvatore is located on afluvial terrace at the confluence of the rivers Oglio and Mella.The site produced evidenceof an archaeological layer,pits and post holes.The prehistoric structures yielded pottery and flint artefacts attributable to a local aspectof the Polada Culture,while no Middle Bronze Age potsherds or handles,arise ad ascia forinstance,have been found so far.The chronological sequence of the pits seems to be asfollows:5,3,Ⅳ,Ⅰ,Ⅱ and Ⅲ.Pits 1 and 4 might be contemporary to each other.Theyonly produced a small amount of potsherds.Better results will be available when thestudy of all the structures will be completed.The faunal remains show that a well balanced economy was practised at the site.Cattle,sheep/goat and pig,in descending order,were the animals killed for meat.A scarcehunting activity is attested by red deer and roe deer bones.These data slightly differfrom those from the other Po Plain EBA sites from where there is evidence of a prevailingpig economy.Cereals were also cultivated as revealed by the presence of burnt seeds andsickle blades made from flint.People at Ostiano S.Salvatore also collected wild plants.A few pieces of daub indicate that the buts had wooden and clay wails.The greatvariety of vessels produced by the pits might suggest that pottery was locally made.Onthe contrary the flint artefacts are very rare,being composed of 28 tools only.The bronzeimplements are extremely scarce.We actually do not know whether this is due to thedistance of the site from the ore veins or to the various activities practised at differentsites complementary to each other.The EBA settlement closed to S.Salvatore is Cella Dati which also produced a few MBAsherds.     

日本治理SO_x与NO_x

通过油品与烟道气的脱硫极力消除SO_x,减少污染。目前,正对No_x污染源采取燃烧改进措施,使之也达到排放标准。在日本,业已作了极大的努力来消除SO_x与NO_x污染,使之达到严格的控制要求。目前在运转中的许许多多装置都采取了重油加氢脱硫、烟遭气脱硫(FGD)和NO_x的选择催化还原措施(SOR)。近来正全力以赴消除NO_x,因为环境的SO_2浓度已降至符合日本的标准。     

3、液相色谱中的痕量富集和化学衍生化在环境分析中的问题和潜力

在污染物痕量分析中,已认识到检测极限的重要性。通常,还有一个指标是选择性。为此,必须要用色谱分离,从而使检测程度主要取决于色谱的参数,特别是进样这一步。在从前的工作中,观察到当样品注入市售反相物质(C_8—C_(18))中时,溶介在极性溶     

大气中作为找矿标志的汞蒸气和其他挥发分

本文介绍了射气技术在地球化学探矿方面的运用。氡的气体晕已用来寻找铀矿床,氦和挥发碳氢化合物的气体晕用于勘探石油。然而与一些金属矿床伴生的气体只是在最近才为人们所注意。原因大概有二方面:1)缺乏说明金属矿物可能放出气体的资料;2)缺乏用以测量在自然界中所发现的这些低浓度气体的分析技术。由于汞的分布较广而且具有实际的蒸气压,所以在过去的工作中选择了汞来进行研究是合乎逻辑的。灵敏、轻便的测汞仪的发展为地球化学勘探工作者提供了从事研究运用汞晕法于探矿的手段。这方面所得到的成功已为新的矿床的发现所证实,但更有意义的是在地球化学勘探方面形成了一种新的。引人感兴趣的概念。     

苏联冶金矿渣的利用

苏联是世界先进产钢国家之一.1980年苏联生产1.48亿吨钢和1.03亿吨轧制产品.根据苏共二十六大决定,1985年苏联冶金工业将生产1.17～1.20亿吨钢轧制产品以及1.5亿多吨钢.目前苏联冶金工业的年生产能力为2.5亿多吨铁矿石,2.6亿吨熔渣,1.1亿多吨铸铁,1.5亿多吨钢和铁合金,1.4亿吨轧制品和钢管.铸铁和钢的生产不     

气候变化对淡水珍珠蚌种群的威胁

引言 在过去的100年中,淡水珍珠蚌Margaritfera margaritifera(L.)的数量在地球北区范围内已经下降到被IUCN列为濒危品种[1].人们认为主要原因是严重的工业污染和农业(有机)污染,采珠渔民的过度开采,寄主鲑科鱼类的减少,以及由于水力发电和河流管理计划的实施所造成的自然河床栖息环境的退化[2].     

SEVERAL SCIENTIFIC PROBLEMS ON ECOLOGICAL SAFETY AND AGRICULTURAL SUSTAINABLE DEVELOPMENT IN WEST CHINA

Ｓｉｎｃｅ 1997ｗｈｅｎＣｈｉｎｅｓｅＰｒｅｓｉｄｅｎｔＪｉａｎｇＺｅｍｉｎａｄｖｏｃａｔｅｄｔｈｅｒｅｃｏｎｓｔｒｕｃｔｉｏｎｏｆａｂｅａｕ ｔｉｆｕｌａｒｅａｏｆｔｈｅＮｏｒｔｈｗｅｓｔ,ａｈｅａｔｅｄｄｒｉｖｅｏｆｅｃｏ ｅｎｖｉｒｏｎｍｅｎｔａｌｃｏｎｓｔｒｕｃｔｉｏｎｗｉｔｈｔｈｅｔｈｅｍｅｓｏｆ“ｅｃｏｌｏｇｉｃａｌａｇｒｉｃｕｌｔｕｒｅ”ａｎｄ“ｅｃｏｌｏｇｉｃａｌｒｅｈａｂｉｌｉｔａｔｉｏｎ”ｈａｓｂｅｅｎｌａｕｎｃｈｅｄ .Ｈｏｗｉｓｔｈｅｗｅｓｔｅｒｎａｇｒｉｃｕｌｔｕｒｅｔｏｍｅ…     

因子分析在分析化学中的应用

<正> 分析化学最通常的任务,也许是测量溶液中的一种组分,然而,这些溶液往往含有几种不需要的,甚至产生干扰的组分。最明显的避免干扰的方法,是从溶液中除去不需要的组分,但这常常是不切实际的,或者说是消磨时间的。如果溶液中保留不需要的     

东外贝加尔阿尔汉纳伊地区金矿化的构造控制

<正> 本文所研究的矿区分布在昂农-图林带中。该带位于阿金斯克地块西部的蒙古-鄂霍次克构造带的南亚带。该区有元古代、古生代和中生代的沉积岩,侵入岩和喷出岩的出露范围很广。     

LA MALACOFAUNA DI ALCUNI LAGHI INSUBRICI MINORI

Si sono indagate le componenti qualitative del popolamento malacologicoancora presente in alcuni piccoli Iaghi e stagni dell'Italia settentrionale.I campionamentihanno interessato o stagno Lagone,i laghi di Comabbio,Ganna,Ghirla.Montorfano,Sar-tirana Briantea.Essi riguardano anche alcuni ambienti adiacenti il corpo d'acqua princi-pale ad esso collegati,come sorgcnti,ruscelli,pozze laterali,torbiere e raccolte d'acquatemporanee.In relazione allo stato di trofia degli ecosistemi e alle caratteristiche fisico-chimichedi alcuni di essi,si sono osservate delle fast di modificazione nella struttura del popola-mento dei Molluschi:anche le alterazioni di causa antropica delle rive influenzano ladistribuzione di molte specie.SUMMARY-The qualitative components of Molluscs population still living in some littlelakes and ponds of Northern Italy have been studied.The specimens were collected fromthe pond of Lagone.the lakes of Comabbio.Ganna.Ghirla,Montorfano.Sartirana Briantea.They also eoncern some habitats sorrounding the lakes as springs,brooks,marshes andpeaty areas.Differences in the structure of Molluscs population have been evidentiated withreference to the trophic degree of the ecosystems and to the phisico-chemical characteristicsof some of them:the distribution of many species is also influenced by the antropicmodifications along the coasts.