Search for dissertations about: "antioxidant properties"

Showing result 1 - 5 of 77 swedish dissertations containing the words antioxidant properties.

  2. 1. Long-term properties of polyethylene films : efficiency of a natural antioxidant

    Author : Clara Strandberg; Ann-Christine Albertsson; Jukka Seppälä; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polymer Technology; alfa-tocopherol; Polyethylene PE ; Thermal aging; Infrared Spectroscopy FT-IR ; Chemiluminescence CL ; Solid-phase microextraction SPME ; Chemistry; Kemi;

    Abstract : There is a growing awareness of the risks of pollution in biological systems and one potential problem is the synthetic antioxidants, used for e.g. the stabilisation of polymeric materials. Natural antioxidants are an interesting alternative, if the high efficiency and thermal stability of the synthetic compounds can be reached. READ MORE

  4. 2. Bioactive nanocellulose materials for the treatment of chronic wounds

    Author : Anna Blasi Romero; Natalia Ferraz; Daniel Aili; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose nanofibrils; covalent immobilization; wound healing; antioxidant properties; antibacterial properties; anti-inflammatory properties; stimuli responsive hydrogels; reactive oxygen species; host defense peptides; Teknisk fysik med inriktning mot nanoteknologi och funktionella material; Engineering Science with specialization in Nanotechnology and Functional Materials;

    Abstract : Chronic wounds represent a burden for the healthcare system and significantly affect the quality of life of the patients. There is currently a lack of efficient treatments but new, improved therapeutic approaches are under development. READ MORE

  5. 3. Aluminium oxide - poly(ethylene-co-butylacrylate) nanocomposites : synthesis, structure, transport properties and long-term performance

    Author : Patricia Nordell; Ulf Gedde; Lars Wågberg; Minna Hakkarainen; KTH; []
    Keywords : nanocomposite; nanoparticles; aluminium oxide; poly ethylene-co-butyl acrylate ; silanization; dispersion; Irganox 1010; antioxidant; OIT; sorption kinetics; water; nanokomposit; nanopartiklar; aluminium oxid; poly eten-co-butyl akrylat ; silanisering; dispergering; Irganox 1010; antioxidant; OIT; vattenupptag.;

    Abstract : Polymer nanocomposites are promising materials for dielectrical use in high voltage applications and insulations. This work presents a study of nanocomposites based on poly(ethylene-co-butyl acrylate) with two different comonomer compositions and two different aluminium oxide nanoparticles. READ MORE

  6. 4. Design, Synthesis and Evaluation of Catalytic Chalcogenide Antioxidants

    Author : David Shanks; Lars Engman; John C Walton; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; antioxidant; tellurium; selenium; computational design; homolytic substitution; radical cyclisation; microwave-assisted synthesis; antioxidant regeneration; Organisk kemi; Organic chemistry; Organisk kemi;

    Abstract : This thesis describes the design, synthesis and evaluation of novel chalcogenide antioxidants.A computational model for the prediction of antioxidant properties of chalcogen-containing antioxidants has been developed. READ MORE

  7. 5. Antioxidant-Impregnated Polymers / Antioxidant Ability and Interactions with Food

    Author : Carolina Wessling; Avdelningen för livsmedel och läkemedel; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Food and drink technology; shelf-life; interactions; packaging; polymers; BHT; antioxidants; a-tocopherol; Livsmedelsteknik;

    Abstract : Interactions between antioxidant-impregnated low-density polyethylene (LDPE) and polypropylene (PP), and oxygen-sensitive foods have been investigated. BHT and a-tocopherol are two antioxidants commonly used in both foods and polymers. In general, BHT was rapidly lost from LDPE film in contact with various foodstuffs. READ MORE