Sökning: "BPA"

Visar resultat 1 - 5 av 26 uppsatser innehållade ordet BPA.

  1. 1. Risk assessment of non-intentionally added substances in polyester yarn made from recycled polyethylene terephthalate (PET)

    Uppsats för yrkesexamina på grundnivå, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Kristina Arnqvist; [2023]
    Nyckelord :r-PET; polyester yarn; NIAS; risk assessment;

    Sammanfattning : Polyester is a synthetic material made from polyethylene terephthalate (PET), which is synthesised from fossil raw materials. Many clothing manufacturers are using polyester in their clothing, which, from an environmental perspective, creates a non-sustainable cycle. LÄS MER

  3. 2. Impact of BPA, BPF and Mixture N1 on DNA-Methylation of GRIN2B and NR3C1 during human neuroprogenitor cell differentiation

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning; Uppsala universitet/Fysiologi och miljötoxikologi

    Författare :Franziska Sophie Richter; [2023]
    Nyckelord :Epigenetics; Endocrine disrupting chemicals; DNA methylation; EDCs; Mixture effects; BPA; BPF; Mixture N1;

    Sammanfattning : Endocrine disrupting chemicals (EDCs) are ubiquitous and their adverse impact on nature, wildlife and humans is extensively researched. We are constantly exposed to EDCs, such as the widespread and extensively researched Bisphenol A, as well as its substitute Bisphenol F, which is coming into wider use, even though it is much less is researched and limited information is available about its endocrine effects. LÄS MER

  4. 3. Inledande utvärdering av epoxibaserad livstidsförlängning av fjärrvärmerör : Relining av kolstål med en polyamidhärdande lösningsmedelsfri epoxi

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för kemi - Ångström

    Författare :Jennifer Andersson; [2022]
    Nyckelord :Relining; Epoxy; District heating; Corrosion; BPA; Glass-transition temperature; Relining; Rörinfodring; Fjärrvärmesystem; Livstidsförlängning; Korrosion; Rost; Epoxi; BPA; Tvärbundna polymerer; Sorption; Diffusion; Glasomvandlingstemperatur; Joniska transportvägar; Friktionsfaktor;

    Sammanfattning : Degradation of steel pipes in district heating systems is often a result of corrosion processes. To maintain the power in the systems the pipes gets replaced when they have been worn-out, resulting in high cost and long service time due to excavation. LÄS MER

  5. 4. Catalytic synthesis of benign bisphenols

    Kandidat-uppsats, KTH/Kemi

    Författare :Victoria Chu; Emma Lundqvist; Hampus Hagelin; [2022]
    Nyckelord :Bisphenols; Vanillyl alcohol; Friedel-Crafts alkylation; Lewis acid catalysis; Sustainability; Bisfenoler; Vanillylalkohol; Friedel-Crafts alkylering; Lewissyra-katalys; Hållbarhet;

    Sammanfattning : This study analyzes the reactivity and selectivity of Friedel-Crafts alkylations using benzylic alcohols and phenols in the presence of a Lewis acid, to synthesize methoxylated bisphenols as a benign alternative to BPA. The degree of methoxylation on the electrophile appears to affect the yield of the reaction while the degree of methoxylation on the nucleophile appears to affect the selectivity. LÄS MER

  7. 5. A REVIEW ON THE ROLE OF A SELECTION OF BISPHENOLS IN ADIPOGENESIS

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för farmaci

    Författare :Hildur Palenius; [2021]
    Nyckelord :Adipogenesis; bisphenol; endocrine disrupting chemicals; obesity;

    Sammanfattning : Obesity is a growing global problem, and it is now considered to be a health problem with epidemic status. The condition is associated with several serious comorbidities, such as cardiovascular diseases and type 2 diabetes mellitus. This makes it highly relevant to seek for solutions to the obesity issue. LÄS MER