Sökning: "bisphenol A"

Visar resultat 11 - 15 av 30 avhandlingar innehållade orden bisphenol A.

1. 11. Epoxides as Contact Allergens - Formation, Sensitising Potency and Structure-Activity Relationships

   Författare :Ida Belogorcev Niklasson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Allergic contact dermatitis; Autoxidation; Bioactivation; Cinnamic alcohol; Diglycidyl ether of bisphenol A DGEBA ; Epoxide; Epoxy resin; Local lymph node assay; Polymerisation; Peptide reactivity; Prehapten; Prohapten; Sensitisation; Skin; Structure-Activity Relationship; Thermogravimetric Analysis;

   Sammanfattning : Chemicals in our environment with which we have repeated skin contact can cause skin sensitisation (contact allergy). To trigger an immune response a compound (hapten) must be able to penetrate the skin, where it needs to be reactive enough to bind to proteins and form immunogenic complexes that are recognised as foreign. LÄS MER

3. 12. Organic micropollutants in highway stormwater and the role of a gross pollutant trap-biofilter stormwater treatment train

   Författare :Ali Beryani; Godecke-Tobias Blecken; Maria Viklander; Katharina Tondera; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering; Centrumbildning - Centrum för dagvattenhantering DRIZZLE ; Centre - Centre for Stormwater Management DRIZZLE ;

   Sammanfattning : The studies which this thesis is based on assessed the stormwater quality in a highway catchment located in Sundsvall, Sweden, and examined the performance of a gross pollutant trap (GPT)-biofilter stormwater treatment train (TT) downstream of the catchment, in terms of removal efficiency, intra-event variability, and environmental risk reduction of organic micropollutants (OMPs) for the receiving water body. Assessing the occurrence and event mean concentrations (EMCs) of all OMPs in the catchment revealed that bisphenol A (BPA), octylphenol (OP), nonylphenol (NP), five carcinogenic and four non-carcinogenic polycyclic aromatic hydrocarbons (PAHs), and C16-C40 fractions of petroleum hydrocarbons (PHCs) all potentially pose an environmental risk to freshwater (EMCs >PNEC: predicted non-effect concentration), while alkylphenolethoxylates, six low- molecular weight PAHs, and lighter fractions of PHCs (C10-C16) do not occur at problematic levels. LÄS MER

4. 13. Synthesis and characterisation of thermoset-clay nanocomposites

   Författare :Xavier Kornmann; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

   Sammanfattning : Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated polyester and epoxy resins with two different approaches. LÄS MER

5. 14. Diverse effects of endocrine-disruptive chemicals on Leydig and adrenocortical cell steroidogenesis in rodents and humans

   Författare :Iuliia Savchuk; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : We are living in a man-made world and often exposed to different chemicals known as endocrine disrupting chemicals (EDCs) that negatively influence our hormonal system. These compounds have the potential to interrupt a normal steroidogenesis and result in harmful effects on the reproductive health of humans and among other organisms. LÄS MER

7. 15. Influence of liquid diffusion on the performance of polymer materials in industrial applications

   Författare :Stefanie Römhild; Mikael Hedenqvist; Lars Berglund; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LCP; Vectra A950; thermoset resin; FRP; diffusion; disclination; annealing; lining; bonding; long-term properties in water; Polymer chemistry; Polymerkemi;

   Sammanfattning : Diffusion of liquids into and through polymers is an important factor that negatively may influence the durability or lifetime of a polymer structure used in industrial applications. In this work two types of polymers, a liquid crystalline polymer (LCP, Vectra A950) and various thermoset resins as used in fibre reinforced plastics (FRP) process equipment were studied with regard to barrier properties, chemical resistance and long-term performance. LÄS MER