Doses efficaces en glyphosate et en 2,4-D pour le contrôle chimique des laitue d'eau (Pistia stratiotes, Linn.) et toxicité du glyphosate vis-à-vis des tilapias (Sarotherodon melanotheron)

The toxic effects of two herbicides Round up (gliphosate) and 2,4-D (herbazol) were tested on Pistia stratiotes (Linn. Araceae) samples cultivated in glass aquariums. The gliphosate appears to be more toxic on Pistia Stratiotes than 2,4-D. It was then tested on tilapia Sarotherodon melanotheron juveniles. The lethal dose for tilapia (CL50 = 13.25 mg.l -1) is about 18, 37 and 74 times higher than the glyphosate toxic dose for plants at 1, 2 and 4 meters water depth respectively.

L'huile de Cá Mòi (Dorosoma nasus): étude physico-chimique

Sardine oil is provided by the Dorosoma nasus Bloch, from the Clupeidae family, subfamily of Dorosomatinae. This note deals with a study on the sardine oil processing methods, physic-chemical composition and industrial uses.

La graisse de Cá linh banh (Thynnichthys thynnoides Bleeker): étude physico-chimique

The Cá linh banh, Thynnichthys thynnoides, is a very common small cyprinid in Cambodia. The material studied in this note was collected during a research cruise of "De Lanessan" vessel of the Oceanographic Institute of Indochina in December 1925. The technical operations have been exposed by the author. This study is part of the previous note by Mr. Marcelet on fish oil.

Analysis and adsorption of phosalone on aquatic sediment

Phosalone is a non systematic, wide spectrum organophosphate pesticide which was discovered in 1961 in the laboratories of the Societe des Usines Chimique Rhone-Poulenc in France. It has been approved for commercial use since 1964 in France, in Australia since 1966, in the United Kingdom in 1967 and in many other countries including Japan, Egypt, USSR and the USA. This study provides a full literature review on all aspects of phosalone including its physical, biological and chemical characteristics, and analytical methods of analysis with particular reference to soils/sediments. Furthermore, it aims to develop a method for the determintion of phosalone in aquatic sediments and to determine the adsorption of phosalone onto kaolinite.