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结果 81-90 的 148
Evaluacion del efecto del ultrasonido sobre el consumo de agua y alimento en ratas y ratones.
1983
Romero Villareal V.
Reducao do cromato de aguas de resfriamento pela planta aquatica Eichhornia crassipes [baroneza, agua, tratamento, poluicao].
1983
Blanke R.
Sílice Disuelto En La Columna De Agua Y En Las Aguas Intersticiales De Una Laguna Costera. 全文
1983
M.J. Green-Ruíz | S. Caschetto | S. Alvarez-Borrego
Manual de conservacao do solo e agua. Uso adequado e preservacao dos recursos naturais renovaveis [Brasil].
1983
Modelo de balance hidrico para evaluar una tecnica de cosecha de agua lluvia en zonas aridas.
1983
Novoa Q Patricio | Garcia Huidobro Jorge | Peralta P Mario
Determinação de ΣDDT e PCBs na água do mar através de pré-concentração em resinas poliméricas 全文
1983
Weber, Rolf Roland(Universidade de São Paulo Instituto Oceanográfico)
A pre-concenvration method for extracting organochlorines from seawater was employed to analyse ΣDDTs and PCBs. The sampling device and the conditions for optimal adsortion performance are described. Recovery tests with spiked solutions were made before applying the method on real samples. Working up of the samples prior to gas chromatographic analysis, precautions and advantages of the procedure are also discussed. The application of the method for seawater, containing very low levels of organochlorines, is shown by data from equatorial surface waters. The average level for ΣDDT and PCBs was 0.21 ng/l and 0.37 ng/l. The overall precision of the method is about ± 15% with a lower limit of detection of 0.1 ng/l-1 for PCBs and 0.05 ng/l-1 for ZDDT.
显示更多 [+] 显示较少 [-]INCIDENCIA DE LA POBLACION PARASITARIA INTESTINAL DE PECES DE AGUA DULCE, TALES COMO TILAPIA Y CARPA 全文
1983
Rodriguez Garcia Daniel Alonso | Velasco Rosas Efrain
Zoneamento do estado de Pernambuco para cultivo de camaroes de agua doce [Macrobrachium, camarao pitu, Brasil].
1983
Coelho P.A. | Torres M.F.A.
Variabilidad espacial de la velocidad de infiltracion del agua en el suelo, 1: Generacion de datos.
1983
Gurovich L. | Stern J.
Calidad bacteriologica del agua de la Bahia de Corral [Chile] en areas de produccion de mitilidos.
1983
Schadebrodt Cortes G.A.
