Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"PNEC"”.
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Ecotoxicological Risk Assessment: Developments in PNEC Estimation
… as the ‘predicted no effect concentration’ (PNEC). At the level of hazard assessment we are concerned with, there is a requirement that procedures be straightforward and efficient, as well as being transparent. The PNEC is in general currently determined using either a fixed assessment factor …
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The GREAT-ER model as a tool for chemical risk assessment and management for Chinese river catchments
… exceed the predicted no effect concentration (PNEC) anywhere in the catchment, however, in 2020 the PNEC was exceeded for 3 stretches, each downstream of major STWs. The model estimated that the concentrations of E1 and E2 in 2016 would exceed PNEC values in stretches largely confined to the …
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Assessment of road pollutants in roadside retention ponds.
… below their predicted no effect concentration (PNEC). A low-cost 24-hour sampling device, which minimised the usage of plastic and water volume to be transported, was developed to simultaneously isolate particles in-situ and collect water samples for additive chemical analysis. TRWPs, paint …
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Elucidation of the roles of PTN and ISG15 in RSV cytopathogenesis: possible biomarkers of severe disease?
… paediatric nasal epithelial cell cultures (WD‐PNECs), provides a reasonable surrogate for in vivo responses. Because of the strong association of severe RSV disease with prematurity and young age, the first part of this thesis describes the utilisation of the WD‐PNEC model to establish and 6 …
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Antibiotika in der aquatischen Umwelt : Eintrag, Elimination und Wirkung auf Bakterien
… hinterfragt und auf die Situation für die PNECmicro-organism-Berechnung angepasst. Anschließend wurde eine PEC/PNEC-Risikoanalyse durchgeführt und so wie die Ergebnisse insgesamt diskutiert.
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Cytostatics in the aquatic environment : analysis, occurrence, and possibilities for removal
… the environmental risk assessment quotients PEC/PNEC are protective (in orders of magnitude of 10e-3 - 10e-6). Nevertheless, cytostatics are a special group of pharmaceuticals with carcinogenic potency and until data with specific tests and end-points designed especially for this class of …
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The development and evolution of vertebrate oxygen-sensing cells
Oxygen-sensing cells release neurotransmitters, including serotonin, in response to hypoxia in the blood or surrounding air/water. This stimulates the glossopharyngeal and/or vagal nerves, triggering increased ventilation via the respiratory reflex. In the adult, they are located in the carotid …