The fluorine content of 10 major sources of water supply from the city of Manaus was determined. The method used in this investigation consisted of the Willard-Winter technique, with modification. The values obtained were very low, showing that the water of the city of Manaus does not offer adequate protection against dental caries..

The nutritional quality of the protein isolated of pink shrimp (Penaeus brasiliensis and Penaeus paukensis) oephalothorax by alkali solubilization and subsequent isoelectric precipitation was biologically evaluated through the food efficiency ratio, protein efficiency ratio and coefficient of digestibility. The isolated protein of pink shrimp oephalothorax showed an inferior nutritional quality in relation to casein; however this protein can be employed in animal feeding in association with other protein sources.

The nutritional quality of the protein of pink shrimp (Pnaeus brasiliensis and Pnaeus palensis) cephalothorax meal was chemical and biologically evaluated through the chemical composition, chemical score of the essential amino acids, food efficiency ratio, protein efficiency ratio and coefficient of digestibility. The studied protein showed a lower nutritional quality in relation to the F.A.O./O.M.S. "reference protein" and casein; nevertheless this protein can be employed inanimal feeding in association with other protein sources.

The isolation of protein of pink shrimp (Penaeus brasiliensis and Penaeus paulistas) cephalotorax was accomplished through the adequation of a method which involved two successive alkali extractions with posterior isoelectric precipitation and the nutritional characterization of the isolated protein was carried out through the chemical score of the essential aminoaoids. The isolated protein of pvnk shrimp céphalothorax showed a mean nutritional quality of 84% in relation to the FAO/OMS "reference protein", primarily limited in sulfurated amino acids.

Os autores descrevem uma técnica para marcação de ovos de T. infestans, utilizando-se de corantes.

The authors present a technique which employes dyestuffs to mark T. infestans eggs.

Os autores descrevem uma técnica para marcação de ovos de T. infestans, utilizando-se de corantes.

The authors present a technique which employes dyestuffs to mark T. infestans eggs.