In the laboratory, G pulex was exposed to several Ni concentrati

In the laboratory, G. pulex was exposed to several Ni concentrations (from 0.001 to 100 mg L-1) in aquatic microcosms. Our results show that G. pulex is very tolerant to Ni (LC50(48 h) = 477 mg L-1 Ni). Time course experiments enabled the construction of a biodynamic model by determining the uptake (k(u)) and elimination (k(e)) rate constants. When the exposure concentration exceeded 1 mg L-1 Ni, the metal uptake reached a maximum due to a limited number of binding sites for Ni. Therefore, the organism’s maximal capacity to accumulate the metal (B-max) and the half-saturation constant (K) were determined to establish the learn more saturation model. We showed

that the two models are comparable for the lowest exposure concentrations (<1 mg L-1 Ni), with k(u)/k(e) = B-max/K. Then, the bioaccumulation of Ni

was recorded in waters exhibiting various concentrations of three major ions (Na+, Mg2+ and Ca2+). Only Ca had an inhibitory effect on the Ni uptake. This study reports for the first time the bioaccumulation of Ni in G. pulex. Because of its high tolerance to Ni and its high capacity to accumulate this metal, this crustacean could be used as an indicator of Ni bioavailability in freshwaters. (C) 2011 Elsevier B.V. All rights reserved.”
“The purpose of this review is to investigate the feasibility of bioaerosol fingerprinting based on current understanding of cellular debris (with emphasis on human-emitted particulates) in aerosols and arguments regarding Selleck Panobinostat sampling, sensitivity, separations, and detection schemes. Target aerosol particles include cellular material click here and proteins emitted by humans, animals, and plants and can be regarded as information-rich packets that carry biochemical information specific to the living organisms present where the sample is collected. In this work we discuss sampling and analysis techniques that can be integrated with molecular (e.g.

protein)-detection procedures to properly assess the aerosolized cellular material of interest. Developing a detailed understanding of bioaerosol molecular profiles in different environments suggests exciting possibilities of bioaerosol analysis with applications ranging from military defense to medical diagnosis and wildlife identification”
“Six genera of the subfamily Tersilochinae (Barycnemis, Diaparsis, Gelanes, Phradis, Probles and Tersilochus) are recognized in South Korea. Two genera, Diaparsis and Tersilochus, were previously recognized from South Korea, whereas the other four genera are recorded from this country for the first time. All genera found in South Korea, except the almost cosmopolitan Diaparsis, are entirely or predominantly Holarctic. A key to the six genera of Tersilochine occurring in South Korea is provided. Two genera of Korean Tersilochinae (Barycnemis and Phradis) are reviewed here, and a key to the other four species (B.bellator, B.dissimilis, P.kyushuensis and P.

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