Preface     

Benjamin Ross  Editor 《Engineering Geology》1989,26(4):III

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Persistent organic pollutants (POPs) in killer whales (Orcinus orca) from the Crozet Archipelago, southern Indian Ocean     

Marie Noël  Lance Barrett-Lennard  Christophe Guinet  Neil Dangerfield  Peter S. Ross   《Marine environmental research》2009,68(4):196-202

Persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and dibenzofurans (PCDFs), are ubiquitous environmental contaminants of which significant concentrations are reported in upper trophic level animals. In 1998, we collected blubber biopsy samples (n = 11) from killer whales (Orcinus orca) inhabiting the coastal waters around Possession Island, Crozet Archipelago, southern Indian Ocean, for contaminant analyses. Despite inhabiting an isolated region far removed from industrial activities, these killer whales can presently be considered among the most PCB-contaminated cetaceans in the southern hemisphere, with concentrations ranging from 4.4 to 20.5 mg/kg lipid weight (lw). PCDD levels ranged from below the detection limit (5 ng/kg) to 77.1 ng/kg lw and PCDF levels from below the detection limit (7 ng/kg) to 36.1 ng/kg lw. Over 70% of our study animals had PCB concentrations which exceeded a 1.3 mg/kg PCB threshold established for endocrine disruption and immunotoxicity in free-ranging harbour seals, suggesting that organic contaminants cannot be ruled out as an additional threat to this declining population.  相似文献   

The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs   总被引：14，自引：0，他引：14  

Daniel J.K. Ross  R. Marc Bustin 《Marine and Petroleum Geology》2009

The effect of shale composition and fabric upon pore structure and CH₄ sorption is investigated for potential shale gas reservoirs in the Western Canadian Sedimentary Basin (WCSB). Devonian–Mississippian (D–M) and Jurassic shales have complex, heterogeneous pore volume distributions as identified by low pressure CO₂ and N₂ sorption, and high pressure Hg porosimetry. Thermally mature D–M shales (1.6–2.5% VRo) have Dubinin–Radushkevich (D–R) CO₂ micropore volumes ranging between 0.3 and 1.2 cc/100 g and N₂ BET surface areas of 5–31 m²/g. Jurassic shales, which are invariably of lower thermal maturity ranging from 0.9 to 1.3% VRo, than D–M shales have smaller D–R CO₂ micropore volumes and N₂ BET surface areas, typically in the range of 0.23–0.63 cc/100 g (CO₂) and 1–9 m²/g (N₂).  相似文献