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Codium tomentosum and Plocamium cartilagineum: Chemistry and antioxidant potential
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Orientador(es)
Resumo(s)
The chemical composition of green Codium tomentosum Stackhouse and red Plocamium cartilagineum
(Linnaeus) P.S. Dixon seaweeds from the Atlantic Ocean surrounding Portugal was studied. For the first
time, the profile of organic acids was analysed in these matrices: seven and four organic acids were
detected in green and red species, respectively. In P. cartilagineum these compounds were present in vestigial amounts, whilst C. tomentosum exhibited a higher content, with oxalic acid being the main compound. Phenolics, UV-absorbing compounds, were absent in both species. Volatiles profile was also
determined for the first time and a total of 41 compounds were identified, which included alcohols, aldehydes, esters, halogenated compounds, ketones, monoterpenes (namely terrestrial ones), norisoprenoid
derivatives, amongst others. Norisoprenoid derivatives and aldehydes were predominant. The main volatiles in green and red seaweeds were limonene and benzophenone, respectively. Additionally, both species revealed considerable antioxidant activity against both reactive oxygen (superoxide radical) and
reactive nitrogen (nitric oxide) species, in a concentration-dependent manner.
Descrição
Palavras-chave
Codium tomentosum Plocamium cartilagineum Organic acids Volatiles Antioxidant activity
Contexto Educativo
Citação
Editora
Elsevier