Sökning: "UV"

Visar resultat 1 - 5 av 547 avhandlingar innehållade ordet UV.

  1. 1. Enhancing UV-protection of clear coated wood by utilizing reactive UV-absorber and epoxyfunctionalized soybean oil

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Sara Olsson; KTH.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UV-protaction; wood; clear coating; UV absorber; epoxy functionalized soybean oil; grafting;

    Sammanfattning : This work presents the development of a new pretreatment for clear coated wood, that aims to increase the photoprotection of exterior wood products, and at the same time make the system more environmentally friendly. The pretreatment comprises the reactive UV absorber 2-hydroxy-4(2,3-epoxy­propoxy)-benzophenone (HEPBP), which has a primary epoxy group that can be covalently attached to the hydroxyl groups of the wood substrate. LÄS MER

  2. 2. Regulation of UV induced apoptosis in human melanocytes

    Detta är en avhandling från Institutionen för biomedicin och kirurgi

    Författare :Cecilia Bivik; Linköpings universitet.; Linköpings universitet.; [2007]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; apoptosis; UV; melanocyte; lysosome; cathepsin; Bcl-2; Bax; Hsp70; JNK; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Dermatology and venerology; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Dermatologi och venerologi;

    Sammanfattning : Malignant melanoma arises from the pigment producing melanocytes in epidermis and is the most aggressive type of skin cancer. The incidence of malignant melanoma is increasing faster than any other type of cancer in white population worldwide, with a doubling rate every 10-20 years. LÄS MER

  3. 3. Process Optimization of UV-Based Advanced Oxidation Processes in VOC Removal Applications

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Francesco Montecchio; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AOP; UV; photocatalysis; ozone; air pollution; VOC abatement; reactor design; reactor modelling; photocatalyst support; electrochemical treatment; electrochemical etching; irradiation modelling; kinetics modelling; fluid dynamics simulation; prototype; full-scale; CFD simulation; Chemical Engineering; Kemiteknik;

    Sammanfattning : Air pollution is a major concern in developed countries due to its hazardous health effects. Recent studies by the WHO (World Health Organization) estimate that urban air pollution causes a number of diseases of the respiratory tract and is associated with 150,000 deaths each year. LÄS MER

  4. 4. Vitamin B6 as a potential antioxidant : a study emanating from UV-B-stressed plants

    Detta är en avhandling från Örebro : Örebro universitetsbibliotek

    Författare :Mikael Ristilä; Örebro universitet.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis; UV-B irradiation; pyridoxine; vitamin B6; ROS; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Kemi; Chemistry;

    Sammanfattning : Increased influx of solar UV-B radiation (280-320 nm), due to a decreasing stratospheric ozone layer, impacts severely on plants. Some of the UV-B effects on plants are related to stress induced by produced reactive oxygen species (ROS). Pyridoxine (vitamin B6) has been reported to be a potential quencher of ROS. LÄS MER

  5. 5. Rheology and UV-curing of a star-branched polyester

    Detta är en avhandling från Institutionen för polymerteknologi

    Författare :Hans Claesson; KTH.; [2001]
    Nyckelord :Powder coating; UV-curing; star-polymer; gel point; alipahtic polyester; rheology; dendritic;

    Sammanfattning : The use of powder coatings has increased steadily over thelast few decades. Their popularity is due to a number of majoradvantages they offer when compared to solvent-borne systems.Near zero VOC-content, reduced energy consumption and near 100%utilisation of the material are some of the advantages. LÄS MER