Results: 4

On the synthesis of vitamin d in the darkness

Actual. osteol; 15 (1), 2019
Published evidence reports the existence of two routes for the transformation of 7-dehydrocholecalciferol into previtamin D3: a photochemical route with the participation of UVB photons and another route that occurs in the darkness. Several reports appears to support the presence of these two routes in s...

Epanorin, a lichen secondary metabolite, inhibits proliferation of MCF-7 breast cancer cells

Biol. Res; 52 (), 2019
BACKGROUND: Epanorin (EP) is a secondary metabolite of the Acarospora lichenic species. EP has been found in lichenic extracts with antimicrobial activity, and UV-absorption properties have been described for closely related molecules; however, its antiproliferative activity in cancer cells has not yet b...

Hepatic toxicity caused by PLGA-microspheres containing usnic acid from the lichen C ladonia substellata (AHTI) during pregnancy in Wistar rats

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT This study aimed to evaluate the teratogenic and hepatotoxic potential of the usnic acid encapsulated into PLGA-microspheres. In total, 12 female Wistar rats in pregnancy were randomly distributed in the control group (n= 6) that received 1.0 mL of physiological solution and treatment group (n= ...

Efecto de borde en la distribución de líquenes y el contenido de clorofilas en fragmentos de Polylepis quadrijuga (Rosaceae) en el páramo de La Rusia (Boyacá-Colombia)

Rev. biol. trop; 64 (4), 2016
Resumen:La fragmentación de los ecosistemas es uno de los fenómenos antrópicos de mayor impacto global, y el efecto borde provoca que solo el interior de los fragmentos conserve sus características bióticas y abióticas originales. Los líquenes son organismos especialmente susceptibles a la variabi...