非金属矿产在环境中的应用     

盖特.  RP  张新安 《国土资源信息化》1993,(6):10-13

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矿山诱地地震活动性研究中的地学层析成像方法     

Young  RP 樊琦 《世界地震译丛》1991,(6):76-85,15

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Cadmium detoxification processes in the digestive gland of cephalopods in relation to accumulated cadmium concentrations   总被引：1，自引：0，他引：1  

Bustamante P  Cosson RP  Gallien I  Caurant F  Miramand P 《Marine environmental research》2002,53(3):227-241

The high concentrations of cadmium recorded in the digestive gland of cephalopods from various temperate and subpolar waters suggest that these molluscs have developed efficient cadmium detoxification mechanisms. The subcellular distribution of cadmium in the digestive gland cells was investigated in seven cephalopod species from the Bay of Biscay (France) and the Faroe Islands. In most species, cadmium was mainly found in the cytosolic fraction of the digestive gland cells, reaching up to 86% of the total cadmium for the squid Loligo vulgaris from the Bay of Biscay. But species with the highest total level of cadmium showed a higher percentage of cadmium associated to insoluble compounds. The quantification of metallothioneins (MTs) by the polarographic method was performed in order to evaluate the involvement of these proteins in the detoxification of the high amounts of bioaccumulated cadmium. Metallothionein levels in cephalopods ranged form 742 +/- 270 to 3478 +/- 1572 microg/g wet weight. No relationship could be established between total cadmium, cytosolic cadmium and MT levels suggesting the occurrence of other Cd-binding ligands. Although these proteins have not been characterised, as cadmium in the digestive gland of cephalopods is mainly associated with soluble ligands, a high potential transfer to predators can be predicted.  相似文献   

Response of estuarine meio- and macrofauna to in situ bioremediation of oil-contaminated sediment     

Schratzberger M  Daniel F  Wall CM  Kilbride R  Macnaughton SJ  Boyd SE  Rees HL  Lee K  Swannell RP 《Marine pollution bulletin》2003,46(4):430-443

Numerous studies have demonstrated the efficacy of bioremediation for enhancing oil removal but the ecological effect on shoreline biota is unclear. Therefore, a field experiment was designed at an intertidal sandflat in SW England to assess the effects of nutrient addition to oiled sediments on meio- and macrofauna for a period of up to 45 weeks. Natural assemblages were exposed to different types of experimental treatments (no oil, oil alone, oil treated with slow-release fertiliser or liquid fertiliser). Bioremediation stimulated the microbial population and increased oil biodegradation. This, however, did not result in faster recolonisation rates of fertilised versus non-fertilised oiled sediments. Mild effects of oil and bioremediation treatments on benthic fauna were observed, including short-term shifts in dominance patterns. Decreased abundance of dominant species in the oiled compared to unoiled sediments resulted in significantly higher evenness of benthic assemblages within the first 11 weeks of the experiment.  相似文献   

杰安特·耶洛奈夫金矿的储量计算和品位控制     

李静仁  J.J.Purdie 《地质与勘探》1973,(5)

到1966年底为止,(加拿大大奴湖滨的)杰安特·耶洛奈夫金矿已生产了大约540万吨矿石,平均品位0.75盎斯/吨.选厂从1948年夏开始生产时,日处理量为250吨,到1958年已增加到800吨.1959年以来,每日的采选矿石量已略高于1000吨.现在的储量(包括附近的各矿山)估计为250万吨,平均品位0.67盎斯/吨.绿泥石和绢云母带中不规则的、透镜状的和脉状的矿体的规模、形态和产状都是极其多变的(图1).采场的长度可由50英尺到400英尺,宽度由10英尺以下到100英尺以上.片岩带横切一组向西陡倾的火山岩.虽然片岩带的叶理是陡倾或直立的,但它的各组岩相可能向东西方向作较缓或较陡的倾斜.总的看来,这一岩带是一个有倾伏背斜和向斜的折皱了的地层单元.  相似文献   

早前寒武纪地壳演化—镁铁质岩浆作用类型的变化     

Hall.  RP 李静仁 《地质科学译丛》1994,11(4):10-20

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一种采用纸上着墨的彩色预打样转移套印方法     

Held  RP 《武测译文》1992,(3):28-31

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印度西孟加拉Raniganj煤田采煤造成的沉降预测     

Sing.  RP 李相然 《国外地质与勘测》1996,(4):37-44

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Mesocosm experiments for evaluating the biological efficacy of ozone treatment of marine ballast water     

Perrins JC  Cordell JR  Ferm NC  Grocock JL  Herwig RP 《Marine pollution bulletin》2006,52(12):1756-1767

Ballast water is a major pathway for the transfer of non-indigenous species in aquatic environments. The objectives of this study were to determine the ability of ozone to reduce the numbers of a spectrum of marine organisms collected from Puget Sound, Washington in replicated mesocosm (280 l) experiments, and estimate the minimum ozone concentrations as measured by total residual oxidant (TRO) required to reduce organism densities. Ozone treatment was effective in removing bacteria, phytoplankton, and mesozooplankton with initial TRO concentrations of 2–5 mg l⁻¹ as Br₂. Persistence of TRO resulted in an extended period of toxicity and cumulative mortality. TRO decay allowed bacteria populations to multiply when TRO levels fell below 0.5–1.0 mg l⁻¹ as Br₂. Phytoplankton chlorophyll a concentrations were rapidly reduced by ozone treatment and did not increase in any treatments or controls because of lack of light. Overall mesozooplankton viability was rapidly reduced by 90–99% in treatment TRO levels above 1.85 mg l⁻¹ as Br₂. Our study outlines novel protocols that can be used for testing different potential ballast water treatment systems in replicated and controlled mesocosm experiments.  相似文献   

Ozonation of seawater from different locations: formation and decay of total residual oxidant--implications for ballast water treatment   总被引：3，自引：0，他引：3  

Perrins JC  Cooper WJ  van Leeuwen J  Herwig RP 《Marine pollution bulletin》2006,52(9):1023-1033

Ballast water is a likely cause for worldwide transfer of non-indigenous aquatic species because of the large volumes and frequency of possible inoculations. Ozone is one treatment option being considered for eliminating non-indigenous species in ballast water. When ozone is applied to seawater, secondary disinfectants are formed, commonly measured and expressed as total residual oxidant (TRO). The goal of this study was to determine those variables most likely to affect the rate of TRO increase during ozonation and the subsequent TRO decline that occurs over time. These parameters strongly influence the efficacy of ozone treatments aimed to eliminate organisms present in ballast water. Seawater was obtained from Puget Sound, Washington; Cape Fear, North Carolina; and San Francisco Bay. Results indicated that seawater characteristics, including the organic content and ammonia, affect the amount of ozone required to achieve a desired TRO level and rate of TRO decay, and therefore need to be considered in determining ozone requirements for ballast water treatment.  相似文献