Mycosporine Like Amino Acids
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Analyses of photoprotective compounds in red algae from the Brazilian coast
Qualitative and quantitative studies of mycosporine-like amino acids (MAAs) in three species of the genus Gracilaria Greville (G. birdiae, G. domingensis and G. tenuistipitata) were performed. A simple and efficient extraction procedure based on ethanol was described. HPLC, UV and mass spectrometry experiments revealed different profiles between extracts obt
Revista Brasileira de Farmacognosia. Publicado em: 01/04/2011
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2. A Fragmentation study of di-acidic mycosporine-like amino acids in electrospray and nanospray mass spectrometry
No presente estudo, duas micosporinas (MAAs) contendo um segundo ácido carboxílico foram submetidas à fragmentação em eletrospray e nanospray em diferentes equipamentos. Em contraste com resultados anteriores, a eliminação de radical metila no modo positivo de análise foi um processo minoritário de fragmentação. Neste trabalho apresentamos também
Journal of the Brazilian Chemical Society. Publicado em: 2009
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3. Studies of ultraviolet sunscreen compounds in algae: mycosporine- like amino acids (MAAs) / Estudos de compostos fotoprotetores da radiação ultravioleta em algas: aminoácidos tipo micosporinas (MAAs)
Aminoácidos tipo micosporinas (MAAs) são compostos responsáveis pela fotoproteção no ultravioleta de diversos organismos aquáticos. São sintetizados pela via do ácido chiquímico por algas, bactérias e fungos, de maneira similar à síntese de flavonóides em plantas superiores. Neste trabalho foram conduzidos estudos relacionados a estes compostos
Publicado em: 2007
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4. Evidence Regarding the UV Sunscreen Role of a Mycosporine-Like Compound in the Cyanobacterium Gloeocapsa sp
The UV sunscreen role commonly ascribed to mycosporine-like amino acids (MAAs) was investigated with an isolate of the terrestrial cyanobacterium Gloeocapsa sp. strain C-90-Cal-G.(2), which accumulates intracellularly an MAA with absorbance maximum at 326 nm but produces no extracellular sunscreen compound (i.e., scytonemin). The intracellular concentrations
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5. Photoadaptation and Protection against Active Forms of Oxygen in the Symbiotic Procaryote Prochloron sp. and Its Ascidian Host
Superoxide dismutase, ascorbate peroxidase, and catalase activities were studied in the symbiotic photosynthetic procaryote Prochloron sp. and its ascidian host Lissoclinum patella. The protein-specific activities of these antioxidant enzymes in the Prochloron sp. and L. patella collected at different depths from the Great Barrier Reef, Australia, were direc