三杨庄汉代遗址霉菌污染种类鉴定与分析

结合内黄县三杨庄汉代遗址表面的霉菌形态特征、利用显微观察与DNA分子鉴定方法,对其11份表面土样中分离到的霉菌进行了数量分析和种类鉴定,确定镰刀菌(Fusarium)、根毛霉(Rhizomucor)和链格孢菌(Alternaria)等14种真菌为遗址现场的主要污染霉菌,为进一步的防霉技术研发和遗址的现场保护研究提供了科学依据.     

苔藓与城市空气重金属污染:监测评价方法与新近应用

苔藓监测空气重金属污染作为一个古老命题,近十年来却有崭新进展。引入了大气净度指数(IAP)、空气质量值(LGW)、相对累积因子(RAF)、污染因子(CF)、富集因子(EF)和沉降速率(D)六个监测评价指标,介绍了其评价方法。重点综述了欧洲近十年来重金属沉降苔藓调查的成就与进展,论及了中国的苔藓监测重金属研究现状及发展对策。     

停输对顺序输送管道混油影响的PHOENICS模拟

在紊流模型基础上, 建立了顺序输送混油新的模型,并利用PHOENICS软件对停输前后混油段浓度分布进行了数值模拟,给出了混油浓度变化图象和曲线。研究结果表明:在竖直管道顺序输送过程中密度差对层流边界层的影响会表现的比较明显且大于粘度差的影响。同时也验证了停输时,密度大的油品在管道下方所形成混油段长度无明显增大现象且小于油品以相反的方向输送时所形成的混油段长度。研究结果对于减少停输工况下的混油与停输再启动混油界面的跟踪与切割具有理论指导意义。     

Stable carbon and hydrogen isotopic fractionations of alkane compounds and crude oil during aerobically microbial degradation

Petroleum-related environmental pollution has be-come a global concern with the industrial and economicaldevelopment, causing serious ecological risks and threat-ening natural resources and human health. Therefore, it isimportant to characterize contaminants and thereby iden-tify unambiguously the sources of contaminants, not onlyfor the purpose of settling disputes related to liability butmore importantly, for selecting appropriate responses andtaking effective cleanup precautions[1]. Chemica…     

He and Ar isotopes in mantle megacryst minerals from Nushan and Yingfengling in Southeast China

He and Ar isotopic compositions of megacrystal minerals from mantle xenoliths were measured by the technique of vacuum crushing extraction. The used samples were clinopyroxene, garnet and ilmenite in Cenozoic alkaline basalts, which were from Nushan in Anhui Province and Ying-fengling in Guangdong Province, respectively, and represented materials from the upper mantle in the continental margin of SE China. The results show ^3He/^4He ratios of 7.99 Ra to 8.58 Ra, consistent with the characteristic ratios of the MORB-type mantle. ^40Ar／^39Ar ratios vary from 313 to 909, suggesting a binary mixing between the MORB-type mantle and air argons. This may reflect the incorporation of the air argon absorbed in oceanic sediments into the mantle beneath the continental margin by subduction of oceanic plate. This study presents the first report that ilmenite megacrysts contain abundant fluid inclusions and noble gases in the mantle xenoliths.     

污染传递框图及其应用

提出了一种新的适用于液压系统污染控制的污染传递框图的构图规则，并通过３００ｍｍ冷连扎机推上液压系统的实例说明该图在建立液压系统污染控制数学模型和污染控制分析与设计中的作用。     

用大蒜监测工业废水的污染

通过观察在工业废水中培养的大蒜根尖的生长情况及微核率，监测工业废水的污染程度。结果表明：染料厂等工业废水对大蒜幼根产生了严重的危害，大蒜可以作为监测废水污染的生物学材料。     

用于电厂生活污水深度处理的不同臭氧化工艺

以河北西柏坡电厂生活污水处理厂二级出水为原水,考察了不同臭氧化工艺对该厂二级出水中微量有机物的处理效果.静态实验和动态实验的结果均表明,紫外线、活性炭协同催化臭氧化技术(即OUC技术)可显著提高二级出水中难降解有机物的氧化降解,并可显著提高臭氧利用率.     

Responses of rice growth to copper stress under free-air CO2 enrichment （FACE）

The responses of rice to the second degree contamination of copper were studied by pot experiments under free-air CO2 enrichment （FACE） with 570 μmol ·mol^-1 of CO2. The results showed that the content of copper in rice leaves was reduced with the CO2 concentration reaching 570 μmol· mol^-1 and this happened more significantly under the second degree contamination of copper. Under FACE, activities of superoxide dismutase （SOD） enzyme in rice leaves treated by copper contamination were induced, whereas the contents of glutathione （GSH） and glutathione disulfide （GSSG） had no significant difference from the control. In the presence of ambient CO2, activities of SOD enzyme treated by copper pollution were suppressed during the whole rice growth, however, the contents of GSH and GSSG were induced at tillering and jointing stages, and then restored to the control levels in later growth under the second degree contamination of copper. With the rice growing, the content of malondialdehyde （MDA） rises continuously, but there had been no significant difference between the treatments at the same growth stage. Further studies are needed on the response mechanism of rice to Cu stress under elevated CO2.     

Palaeodietary study of Sanxingcun Site, Jintan, Jiangsu

C and N stable isotope ratios of 19 human bones in Sanxingcun Site, Jintan, Jiangsu Province, were measured to explore the lifestyle and social economic structure. Although the bone collagen degraded to different extents, the atomic ratio of C/N was located in the range of 2.9-3.6, indicating that they were preserved very well. Average δ13C value (20.05±0.21‰), average δ 15N value (9.69 ±0.33‰) and poor positive correlation between each other suggested that rice agriculture was dominant with hunt-ing-fishing supplemented in human lifestyle. Poor negative correlation between δ 15N values and C3 percentages of foods implied relative independence of rice agriculture and hunting-fishing. Compared to Hemudu Site and Qingpu Site, rice agriculture was developed further, but hunting-fishing decreased. The mode for people in Sanxingcun Site to get the meat was still in the initial exploitation.