RESUMEN
The object of the study was to clarify whether rumination has a bearing on the decomposition of zearalenone in the metabolism of the toxin or not. The experiment was performed using rumen fluid in vitro. Rumen fluid samples containing various amounts of zearalenone were incubated in a carbon dioxide atmosphere at 38 degrees C for two days. The zearalenone content was determined by liquid chromatography after 0, 4, 24 and 48 hours incubation periods. The incubation of 4 hours decreased the toxin content by 11%, that of 24 h by 29% and that of 48 h by 37.5% on average. These results indicate that the quantity of zearalenone and the quality of rumen fluid have effects on the ratio of the toxin decomposed.
Asunto(s)
Alimentación Animal/análisis , Jugo Gástrico , Micotoxinas/metabolismo , Resorcinoles/metabolismo , Rumen , Zearalenona/metabolismo , Animales , Bovinos , Cromatografía Liquida , Factores de TiempoRESUMEN
The ependyma of the lateral ventricle of rats with hereditary hydrocephalus was studied using scanning electron microscopy. Normal rats from the same litters were used as control animals. The surface morphology of the lateral ventricle of normal rats corresponded to results reported by other authors. The most prominent changes in the surface morphology of the ependyma of the hydrocephalic rats were seen in the cilia. They were shortened, fewer in number and clumped or matted. The surface of the ependymal cells was flattened and contained small, irregular projections. The number of large supraependymal cells, regarded as neurons, appeared to have diminished in the hydrocephalic rats. The number of supraependymal macrophages was greatly increased in these rats, suggesting the existence of an ependymitis.