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Visar resultat 1 - 5 av 25 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Quantum Optical Description of High-order Harmonic Generation

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Isabel Moreno; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : High-order Harmonic Generation (HHG) is a highly non-linear process in which an atom interacts with a strong laser field. The laser field lowers the atomic potential barrier allowing bound electrons to escape into the continuum through tunnel ionization, propagate, and, with some probability, recombine with the parent ion. LÄS MER

  3. 2. Development and Evaluation of an Enzyme-Based Sunscreen

    Master-uppsats, Lunds universitet/Bioteknik; Lunds universitet/Bioteknik (master)

    Författare :Karolina Eriksson Torfgård; [2023]
    Nyckelord :Enzyme activity; UV-filter; Protease; Biotechnology; Technology and Engineering;

    Sammanfattning : Ultraviolet radiation (UVR), specifically of UVA and UVB, has been associated with the development of both photoaging and photo-carcinogenesis, potentially leading to cancer. The use of sun protection in the form of UV filters is known to minimize these damages. LÄS MER

  4. 3. Targeted and non-targeted approaches to ImprUV the nutritional profile of greenhouse crops

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Hanna Forsman; [2022]
    Nyckelord :;

    Sammanfattning : This work was made to discover if greenhouse crops, particularly broccoli and Chinese cabbage, can change their metabolism and therefore their nutritional profile depending on what ultraviolet radiation (UV) they were exposed during growth. This is important since the world’s population increases and therefore, we need to be able to produce foods with increased nutritional quality. LÄS MER

  5. 4. Development of an absorption model for gas discharge lamp simulation

    Master-uppsats, Malmö universitet/Institutionen för materialvetenskap och tillämpad matematik (MTM)

    Författare :Oscar Vigstrand; [2021]
    Nyckelord :Discharge lamp; Plasma; UV radiation;

    Sammanfattning : Ultraviolet (UV) light has been used for disinfection purposes for over 100 years. Irradiation by UV light is a method to disinfect surfaces in order to prevent microbiological growth. At Tetra Pak this is of great importance as they are manufacturer of filling machines. LÄS MER

  7. 5. Ancient plant cuticle chemistry: preservation and characterization of organic matter as biomarker of past UV-B radiation

    Master-uppsats, KTH/Kemi

    Författare :Larissa Lopes Cavalcante; [2021]
    Nyckelord :UACs; fossil cuticle; p-coumaric acid; ferulic acid; UV-B proxy; micro-FTIR; confocal Raman microscope; UAF; fossil kutikula; p-kumarinsyra; ferulinsyra; UV-B-proxy; mikro-FTIR; konfokalt Raman-mikroskop;

    Sammanfattning : Biologiska processer hos olika organismer påverkas av ultraviolett-B-strålning (UV-B). Kunskapen om förändringar i UV-B-flödet som nått planetens yta under det geologiska tidsspann sedan flercelligt liv uppstod är dock begränsad. LÄS MER