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Vliv redoxního stavu na zhášení excitace v bakteriochlorofylových agregátech / Vliv redoxního stavu na zhášení excitace v bakteriochlorofylových agregátech

Harvesting only 4 % of light striking the Earth could possibly fulfill present energy demands of a mankind. Chlorosome of green sulfur bacteria is re- garded as suitable light-harvesting system for photosynthesis imitation. This work presents comparison of absorption and hole burning spectra of artificially prepared aggregates similar to chlorosomes with different compositions in order to verify the proposed role of quinones in excitation quenching and its redox de- pendence. Absorption spectra at room and helium temperature showed a resem- blance between artificial aggregates and chlorosomes. Hole burning experiments verified the role of quinones in excitation quenching under aerobic conditions. Even more pronounced excitation quenching was observed under anaerobic con- ditions. Significant improvements of the original experimental set-up provided better experimental data which raised many further question that are worth trying to answer in the future.

Identiferoai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:300537
Date January 2011
CreatorsPaleček, David
ContributorsDědic, Roman, Polívka, Tomáš
Source SetsCzech ETDs
LanguageEnglish
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/masterThesis
Rightsinfo:eu-repo/semantics/restrictedAccess

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