Showing papers on "Biomphalaria alexandrina published in 1984"

The molluscicidal properties of Ambrosia maritima L. (Compositae). 2. Results from a field trial using dry plant material.

Abstract: A field trial in Egypt of the plant molluscicide, Ambrosia maritima is described. Applications of 140, 70 and 35 mg/l-1 dry, whole plant were made to irrigation canals and drains in June. The treatment effect took between 1 and 5 weeks to become fully established. The reduction in the numbers of alive Biomphalaria alexandrina snails was generally more than 90% and was virtually the same at all treatment levels and in both types of watercourse. The snail population remained at a low level for at least 3 months until September-October. The possible use of a single, annual application in April or May in controlling snails throughout the main schistosomiasis transmission season in Lower Egypt is suggested.

Biochemical studies on the genetic material of fresh water snails, intermediate hosts of schistosomiasis--I. Effect of ultraviolet radiation as physical mutagen on the chemical nature of deoxyribonucleic acid.

Abstract: Les effets des radiations ultraviolets a doses differentes comme agents mutagenes physiques ont ete etudies sur la nature chimique de materiaux genetiques (l'acide deoxyribonucleique) de Biomphalaria alexandrina, hote intermediaire de Schistosoma mansoni

Genetic studies on fresh water snails, specific intermediate hosts for schistosomiasis--VII. Effect of gamma radiation as a physical mutagen on histones in Biomphalaria alexandrina snails.

Abstract: Les effets des rayons γ comme mutagenes physiques sur les histones des escargots Biomphalaria alexandrina mansoni ont ete etudies. La degradation des histones et les variations des aminoacides ont ete explorees

Biochemical studies on the genetic material of fresh water snails, intermediate hosts of schistosomiasis--II. Effect of a chemical mutagen, cyclophosphamide, on the chemical nature of deoxyribonucleic acid.

Abstract: L'ADN a ete isole de limacons d'eau douce Biomphalaria alexandrina. Apres traitement par un mutagene chimique, l'endoxan, la determination de la composition des bases de l'ADN isole a ete faite par chromatographie sur papier