RESUMEN
Existem vários esforços para o desenvolvimento de produtos capazes de reduzir ou eliminar os microrganismos patogênicos presentes na cavidade oral. A literatura relata uma série de efeitos adversos associados ao uso contínuo destes produtos, dentre eles vômitos, diarreia e o escurecimento da dentina. A indução da resistência microbiana é um dos fatores de destaque relacionado ao uso destes produtos. Neste trabalho, o decocto de romã (Punica granatum L.), obtido a partir das cascas do fruto, foi utilizado para avaliação de seu potencial antimicrobiano sobre cepas de Pseudomonas aeruginosa, Candida albicans e Enterococcus faecalis, sendo ativos contra os dois primeiros microrganismos. A aplicação do decocto sobre os microrganismos presentes em amostras de saliva de crianças mostrou halos de inibição semelhantes ao obtido com a solução de clorexidina a 0,12%. A atividade antimicrobiana do decocto de romã aponta esta preparação como uma fonte em potencial para o desenvolvimento de produtos de uso oral...
Several products have been developed to eliminate or reduce potential pathogenic microorganisms of the oral microbiome. The continuous use of these synthetic products can result in side effects such as vomiting, diarrhea, darkening of the teeth and the induction of microbial resistance. Pomegranate (Punica granatum) peel decoction was tested to assess its antimicrobial activity. In vitro analysis showed the decoction had antimicrobial activity against strains of Pseudomonas aeruginosa and Candida albicans, but none was detected against Enterococcus faecalis. When tested on saliva samples from children, the decoction showed great potential in reducing the load of microorganisms, the inhibition haloes produced with saliva samples being similar to those of the antimicrobial control (0.12% chlorhexidine). The pomegranate peel decoction in water could thus provide a promising source for developing solutions for use against oral diseases...
Asunto(s)
Humanos , Masculino , Femenino , Niño , Antiinfecciosos , Plantas Medicinales , LythraceaeRESUMEN
Patterns of local abundance and regional distribution of tree species were analyzed on three spatial scales and compared with those predicted by Hanski's 1982 original core-satellite model, Brown's 1984 niche-based model, and Tokeshi's 1992 model. Data were collected in seven forest fragments dispersed over approximately 7200 km2, remnants of a former continuous forest in the south of Mato Grosso do Sul state, southwestern Brazil. Fifty-six east-west-oriented 10 m yen 150 m plots were randomly demarcated in those fragments from 1994 to 1996. In each plot all trees having DBH > or = 0.15 m were recorded and measured. The smallest scale was that of the fragments themselves and the greatest was that of the entire region. No evidence was found of the bimodality predicted by Hanski's 1982 model on any scale. On all scales, an unimodal pattern was found whose mode was on the left side (satellite mode) of the distribution. This pattern was in best agreement with the predictions of Tokeshi's 1992 model.
