不怕雷击de古建筑

据前苏联(上世纪80年代)一份研究资料显示,世界上几个历史悠久的国家都曾记载过各自国家历史古迹避雷的事件。古希腊文献“事实”举出雅典等四城市7座神庙与殿堂不怕雷电袭击的例子。在伊拉克美索布达尼亚时代的都城,几座浆石宫殿历经几百年的周期性雷击基本完好地保存下来。在     

台湾7.6级地震及其强余震前电磁辐射特征

本文总结了1986年11月15日台湾花莲海域地震及其强余震前电磁辐射的前兆特征。所用的仪器为DDC-2型电子补偿仪、XWX-2042电位差计,记录极距为100m的两埋地电极间所接收到的电磁辐射信息,震前异常波形最大幅度可达187.5mv,为正常背景的十数倍,频谱较宽(0.005—5Hz)。这种特征对认识发生在太平洋板块与亚欧板块上的地震有一定意义。     

日本石油工业开发合作中心召开国际石油工业环境保护专题讨论会

日本石油工业开发合作中心(JCCP)于一九八六年三月三日至七日在日本东京组织召开了《国际石油工业环境保护专题讨论会》。有十三个产油国一阿拉伯联合酋长国、阿尔及利亚、中国、印度尼西亚、伊朗、伊拉克、南朝鲜、马来西亚、墨西哥、尼日利亚、卡塔尔、沙特阿拉伯、委内瑞拉一和十一个日本炼油厂、工程公司的代表及四十名来自日本政府、企业的来宾与观察员参加了会议。代表们报告和讨论了三个专题:1.炼油厂的环境保护及其设施;2.石油贮运、分配和消费中的环境保护问题及防护措施;3.石油商业和环境保护。     

自制起重机的安全检查与验收

目前,有些工矿企业自制的起重机不符合设计规范和起重机械安全规程要求,在设计、选材、加工、热处理、装配等方面的质量都不如专业生产厂要求严格,质量检验手段跟不上,安全保护装置不齐全,不可靠,不能预防由于操作失误造成的设备故障和人身伤亡事故。因此,加强自制起重机的检查     

应当重视环境保护管理工作

要搞好环境保护工作,如同要搞好生产领域的其它各项工作一样,必须一手抓科学技术,一手抓科学管理,二者切不可偏废。特别是随着环境保护工作的深入开展,各级环保机构的建立和健全,以及环保专业队伍的逐渐发展壮大,怎样加强环境保护管理工作就愈加突出地摆在我们的面前。正如马克     

基于GIS的泉州市生态敏感性分析

泉州近来频繁发生地质灾害,生态敏感程度较高,社会经济的发展受到了一定程度的制约.本文选取坡度、高程、坡向、水域、植被覆盖指数(NDVI)、土地利用类型6个生态因子,构建泉州市生态敏感性评价体系.通过ArcGIS平台结合层次分析法,对6个生态因子的敏感指数进行多因子综合评价,并运用自然断点法将结果划分为5个敏感等级.结果...     

Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: results from an isotopic dilution study

In this study isotopic dilution methods were used to investigate the hypothesis that access to metals associated with specific chemical components in the soil that are not available to non-accumulator species could be involved in hyperaccumulation. The hyperaccumulator Thlaspi caerulescens and a non-accumulator species, Brassica napus, were grown in Cd and Zn enriched soil components calcite, goethite, charcoal and cryptomelane. The metal enriched components were aged to allow transformation of a proportion of added metals to non-labile forms. Results from the isotopic dilution L value method showed that despite taking up more metals, T. caerulescens accessed the same pool of metals as B. napus. Hence differential access to different solid-phase pools of metals appears to be an unlikely mechanism underlying metal hyperaccumulation. For all components except charcoal, L values for Cd and Zn were greater than the corresponding E values suggesting that E values may tend to underestimate the bioavailable fraction of metals in soils.     

Seasonal and spatial patterns of metals at a restored copper mine site II. Copper in riparian soils and Bromus carinatus shoots

Soil and plants were sampled throughout winter and spring near a perennial stream traversing a restored mine site in a winter-rainy climate. Within 1m of an acidic reach of the stream, soil had pH 3-5 and 50-100 microg/g "bioavailable" copper (extractable with 0.01 M CaCl2). Soil 2-3 m from the stream had pH 5-8 and lower (less than 3 microg/g) bioavailable copper. "Oxide-bound" copper (extractable with 2N HCl) was 50-100 microg/g at most locations. Copper concentrations in the shoots of field-collected Bromus carinatus declined from 20 microg/g in winter to 2 microg/g in spring at all sampling sites. A similar temporal pattern was found in plants grown under controlled conditions. Thus B. carinatus has a developmental program for control of shoot copper concentration, causing a seasonally-varying pattern of copper phytoaccumulation over a large range of copper availability in the soil.     

黄孢原毛平革菌(Phanerochaete chrysosporium)对3种酚酸物质的降解作用

研究黄孢原毛平革菌(P.chrysosporium)对香草酸、阿魏酸、对羟基苯甲酸的降解作用.结果表明,300 μg/mL的上述3种酚酸物质与黄孢原毛平革菌共培养2 d后,3种酚酸物质的降解率分别达到73.48%、99.09%和54.74%.黄孢原毛平革菌发酵上清液对3种酚酸物质的降解能力较弱,作用2 d后,降解率分别为13.28%,4.47%和5.43%,而该菌菌丝体降解能力很强,作用2 d后3种酚酸物质的降解率分别达到65%,98.37%和48.69%.研究表明,黄孢原毛平革菌对这3种酚酸的降解主要在菌体表面或体内进行.