Bacterial filtration efficiency of medical face masks - Evaluation of the use of disposable plastic petri dishes in Andersen impactor.

Bacterial filtration efficiency is the main characteristic of medical face masks effectivity and quality. The testing method is given by European and US, respectively, standard. The method is based on the analysis of biological aerosol with the bacterium Staphylococcus aureus in Andersen cascade impactor.

[Changes of plasma obestatin and ghrelin levels after soluble fiber with glucose and after fiber alone in healthy women and in patients with bulimia nervosa].

Background: The recent identification of obestatin, a novel peptide hormone derived from the same gene as ghrelin, has added further complexity to ghrelin physiology. Despite the rapid progress, many questions remain unanswered, including the regulation of orexigen ghrelin and putative anorexigen obestatin secretion by food composition in humans. The present study was undertaken to investigate the influence of caloric and noncaloric food on plasma ghrelin and obestatin concentrations in healthy women (n = 6; age 23.