Sökning: "UV irradiation"

Visar resultat 1 - 5 av 91 avhandlingar innehållade orden UV irradiation.

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

    Författare :Francesco Montecchio; Klas Engvall; Roberto Lanza; Ernest Blatchley III; KTH; []
    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

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

    Författare :Cecilia Bivik; Inger Rosdahl; Karin Öllinger; Maria Shoshan; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; apoptosis; UV; melanocyte; lysosome; cathepsin; Bcl-2; Bax; Hsp70; JNK; Dermatology and venerology; 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

  4. 3. Surface modification of birch and acetylated birch wood by silicone nanofilaments

    Författare :Haiyan Yin; Magnus Wålinder; Agne Swerin; Andra Dédinaité; Jan Van den Bulcke; KTH; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acetylated wood; surface modification; superhydrophobicity; plastron; wetting; silicone nanofilaments; UV irradiation; mold resistance; blue stain.; Acetylerat trä; ytmodifiering; superhydrofobicitet; plastron; vätning; silikon-nanofilament; UV-bestrålning; mögelresistens; blånad.; Building Materials; Byggnadsmaterial;

    Sammanfattning : The increasing awareness of sustainability motivates the development of building materials from renewable resources. The requirements of wood-based products with improved durability, for example, enhanced liquid repellence and UV and biological resistance, are still a challenge. LÄS MER

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

    Författare :Mikael Ristilä; Åke Strid; Leif Eriksson; Éva Hideg; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis; UV-B irradiation; pyridoxine; vitamin B6; ROS; Chemistry; Kemi; Chemistry; Kemi;

    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

  7. 5. The molecular mechanisms behind perception and signal transduction of UV-B irradiation in Arabidopsis thaliana

    Författare :Irina Kalbina; Åke Strid; Lars-Gunnar Franzén; Örebro universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Action spectroscopy; Arabidopsis; gene expression; reverse genetics; signal transduction; UV-B irradiation.; Biochemistry; Biokemi; Biochemistry; Biokemi;

    Sammanfattning : Elevation of UV-B radiation (280-315 nm), occurring as a result of depletion of the stratospheric ozone, causes a number of physiological and biochemical changes in plants. Damage to the photosynthetic apparatus (including the bleaching of the pigments which trap the sun's energy), to the processes of cell division and growth regulation, and to the composition and replication of genetic material are just some of these changes. LÄS MER