Sökning: "hazardous chemicals"
Visar resultat 21 - 25 av 60 avhandlingar innehållade orden hazardous chemicals.
21. Wide-scope screening for contaminants of emerging concern in archived biota: Method development, suspect prioritisation, and non-target screening in a novel identification tool
Sammanfattning : Environmental monitoring of hazardous chemicals in wildlife conventionally uses target screening for selected contaminants, but relatively few contaminants are moni-tored and knowledge of potentially hazardous contaminants of emerging concern (CECs) in wildlife is lacking. In this thesis, a non-target screening (NTS) method com-bined with temporal trend analysis was developed and applied as a prioritisation tool for identification of CECs in top predators, using high-resolution mass spectrometry (HRMS). LÄS MER
22. In vitro bioassays: monitoring of bioactive chemical pollutants in food and food contact materials
Sammanfattning : We are continuously exposed to mixtures of known and unknown chemicals via our diet. The standard control program for food safety, at present, relies heavily on the chemical quantification of a limited number of chemicals with known toxic properties. LÄS MER
23. Chemical substitution with a life cycle perspective: The case of per- and polyfluoroalkyl substances in durable water repellents
Sammanfattning : The aim of the research presented in this thesis was to support the process of substitution of side-chain fluorinated polymers in durable water repellents (DWRs), that give rise to emissions of hazardous per- and polyfluoroalkyl substances (PFASs). The focus was on: i) the provision of improved decision support regarding the environmental and human health performance of alternatives, and ii) public readiness for substitution and what messages can motivate consumers to voluntary substitution. LÄS MER
24. Towards improved drinking water safety : the use of in vitro bioassays to optimize treatment processes and assess chemical hazards
Sammanfattning : Drinking water safety has been primarily dependent on the monitoring of only a limited number of individual chemicals via chemical analysis, which is insufficient to characterize the myriad of hazardous chemicals present in water. Effect-based methods (EBMs) using in vitro bioassays are useful in that they evaluate biological effects from all the known and unknown chemicals in the water and draw on toxicological principles. LÄS MER
25. Comprehensive non-target screening to find and identify new biomagnifying organic contaminants in Baltic Sea top consumers
Sammanfattning : The development of industrial processes in the 19th and 20th centuries, in particular oil refining, resulted in a huge discovery and subsequent large-scale production of a variety of chemicals. These useful chemicals supposedly made the everyday lives of people easier and better by, for instance, controlling the spread of diseases such as malaria, through the use of DDT and other organochlorine pesticides (OCPs). LÄS MER
