RESUMO
Brettanomyces bruxellensis is the main microorganism responsible for the production of off-flavours in wine. Studies have been carried out in synthetic cultures using p-coumaric acid for the production of vinyl and ethylphenols. The results obtained have been extrapolated to authentic wine, but there is no evidence that this correlation will be correct. We studied the behaviour of B. bruxellensis native strain LAMAP L2480 in authentic wine and in a synthetic medium with a chemical composition similar to the authentic wine used in this study (basal synthetic wine + pH, ethanol and hydroxycinnamic acid concentrations of commercial wine). In some assays, B. bruxellensis has been studied using media containing 100 mg L(-1) p-coumaric acid, so we also used the same concentration added to the authentic and synthetic wines. The microorganism showed better growth in authentic wine, regardless of the presence of p-coumaric acid. In the case of synthetic wine, the addition of p-coumaric acid caused a delay in yeast growth and an increase in the production of volatile phenols. The coumarate decarboxylase activity did not show any difference regardless of the media and the presence of p-coumaric acid. Vinylphenol reductase showed higher activity when a higher concentration of p-coumaric acid was added in synthetic wine, but no change was observed in authentic wine.
Assuntos
Brettanomyces/crescimento & desenvolvimento , Meios de Cultura/metabolismo , Vinho/microbiologia , Brettanomyces/metabolismo , Ácidos Cumáricos/metabolismo , Meios de Cultura/química , Fenóis/metabolismo , Propionatos , Vinho/análiseRESUMO
Los leiomiomas cutáneos son tumores poco frecuentes de músculo liso dérmico, habitualmente múltiples, que se asocian a leiomiomatosis uterina en algunos casos con carácter de herencia autosómica dominante. Se presenta el caso de una mujer de 45 años con leiomiomatosis cutánea y uterina múltiple (síndrome de Reed).
Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , LeiomiomatoseRESUMO
Se revisan las características, mecanismo de acción, ventajas, efectos adversos y usos de la Radiación UVB de Banda angosta (UVB-NB); se muestran las guías de tratamiento en general en psoriasis, en vitiligo, asi como en combinación con retinoides.