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Visar resultat 1 - 5 av 6 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Evaluation of antioxidant effect of an algae extract on skin: in vitro study

    Kandidat-uppsats, Malmö universitet/Institutionen för biomedicinsk vetenskap (BMV)

    Författare :Oday Al Mustafa; [2023]
    Nyckelord :Algae extract; antioxidant; DPPH; microalgae; ROS; skin covered oxygen electrode; skin;

    Sammanfattning : Algae extracts are used as cosmetic products and used as additives in specific foods because of their antioxidant activity. Reactive oxygen species (ROS) such as hydrogen peroxide and superoxide radicals are toxic on the skin and can be scavenged by antioxidants, which are abundant in microalgae. LÄS MER

  3. 2. Computational modelling of photosynthetic excitons coupled to a microcavity

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Ilmari Turunen; [2022]
    Nyckelord :Cavity QED; LH2; Chlorophyll; Exciton; Polariton; Transition dipole moment; Absorbance; Physics and Astronomy; Chemistry; Biology and Life Sciences;

    Sammanfattning : Cavity quantum electrodynamics (QED) is a theory that is used for describing the interaction between matter and cavity modes. Not until relatively recently, cavity QED has been extended to the study of photosynthetic light-harvesting complexes (LHCs). LÄS MER

  4. 3. Study of the vibronic mixing in chlorophylls with multidimensional spectroscopy

    L3-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Ignacio Martínez Casasús; [2021]
    Nyckelord :Two-dimensional spectroscopy; Ultrafast spectroscopy; Chlorophyll a; Chlorophylls; Photosynthesis; Light harvesting; Vibronic mixing; Quantum coherence; Chemical physics; Chemistry;

    Sammanfattning : Chlorophylls comprise one of the most important families of molecules for the photosynthetic process. Chlorophyll-like molecules have been classically interpreted under the Gouterman model, being thought to feature two independent transitions, Qy(S1) and Qx(S2). LÄS MER

  5. 4. Effects of the carotenoid inhibiting herbicide diflufenican on the photosynthesis of benthic algae

    Kandidat-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Jelena Rakovic; [2014]
    Nyckelord :benthic algae; freshwater; herbicides; diflufenican; PAM; fluorescence; Lake Erken; photosynthetic efficiency;

    Sammanfattning : Throughout the world, the large-scale use of pesticides in agriculture is an area of concern due to known harmful effects on human and environmental health. Mixtures of different pesticides are found in lakes and streams, where their presence endangers aquatic organisms, like benthic algae, and the ecosystem services they provide. LÄS MER

  7. 5. Decoherence-assisted transport in pigment protein complexes

    Kandidat-uppsats, Uppsala universitet/Teoretisk kemi

    Författare :Adrià Sonet Ventosa; [2014]
    Nyckelord :Entanglement; concurrence; nonlocality; electronic energy transfer; FMO complex; light-harvesting complex.;

    Sammanfattning : Two chlorophylls of the FMO complex, the light-harvesting complex of the green sulfur bacteria, are modeled as two coupled qubits, each surrounded by one spin-bath simulating the environment. The dynamics of the system at a non-zero temperature provide exact analytical expressions for the transition probability and the coherence. LÄS MER