947 resultados para Silver-plated ware


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[redaktzie kolegie: Rafael Mahler ... ]

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Among all classes of nanomaterials, silver nanoparticles (AgNPs) have potentially an important ecotoxicological impact, especially in freshwater environments. Fish are particularly susceptible to the toxic effects of silver ions and, with knowledge gaps regarding the contribution of dissolution and unique particle effects to AgNP toxicity, they represent a group of vulnerable organisms. Using cell lines (RTL-W1, RTH-149, RTG-2) and primary hepatocytes of rainbow trout (Oncorhynchus mykiss) as in vitro test systems, we assessed the cytotoxicity of the representative AgNP, NM-300K, and AgNO3 as an Ag+ ion source. Lack of AgNP interference with the cytotoxicity assays (AlamarBlue, CFDA-AM, NRU assay) and their simultaneous application point to the compatibility and usefulness of such a battery of assays. The RTH-149 and RTL-W1 liver cell lines exhibited similar sensitivity as primary hepatocytes towards AgNP toxicity. Leibovitz's L-15 culture medium composition (high amino acid content) had an important influence on the behaviour and toxicity of AgNPs towards the RTL-W1 cell line. The obtained results demonstrate that, with careful consideration, such an in vitro approach can provide valuable toxicological data to be used in an integrated testing strategy for NM-300K risk assessment.

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Kaffee war im 20. Jahrhundert wichtige Handelsware und heißgeliebtes Konsumgut. Der Sammelband beleuchtet Zusammenhänge und Widersprüche entlang der globalen Warenkette von Produktion, Handel und Konsum. Indigene Erntearbeiter in Mexiko, costaricanische Kleinbauern, Hamburger Importhändler, Röster, Konsumenten und Fair-Trade-Aktivisten stehen als historische Akteure im Zentrum. Geographisch erstreckt sich die Reichweite von Zentralamerika über Hamburg und die beiden deutschen Staaten bis nach Indien, Äthiopien und Brasilien. Das internationale Autorenteam präsentiert neue Forschungsergebnisse zur Wirtschafts-, Sozial- und Kulturgeschichte des Kaffees.

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Signatur des Originals: S 36/F03198

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Signatur des Originals: S 36/F11150