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	Provedor de dados OMA (2) Autor Mertens, J. (2) Massart, D.L. (1) Persoone, G. (1) Palavra-chave Aquaculture techniques (1) Experimental rearing (1) Instruments (1) Marine environment (1) Nitrates (1) Spectroscopy (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 1972 (1) 1971 (1) País Belgium (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Determination of nitrate ion in marine biotopes with high nitrate content by ultraviolet spectrophotometry OMA Mertens, J.; Massart, D.L.. A simple and rapid method for the determination of nitrate in seawater of high nitrate content (>1 ppm) is proposed. The absorption of the nitrate ion is measured at 210 and 220 mµ. The sample is treated with a measured quantity of hydrochloric acid to eliminate the carbonate and bicarbonate interferences and measured against a nitrate free blank prepared by reduction of the nitrate to ammonia with Raney nickel. The addition of HCl permits also storage of the sample without special precautions and the use of the blank eliminates the most serious of the interferences (bromide) expected in seawater. The interference of organic matter limits however the applicability of the method to concentrations higher than 1 ppm. Tipo: Info:eu-repo/semantics/article Palavras-chave: Marine environment; Nitrates; Spectroscopy. Ano: 1971 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3424 The flow-through column: a simple and multipurpose rearing device OMA Mertens, J.; Persoone, G.. A simple flow-through system for culturing or colonization purpose is described. It consists of piled up petri-dishes placed on top of a water reservoir with an air-water lifting tube. Each of the seperately removable units is composed of the bottom of a petri-dish glued on top of the lid of another one. A short piece of plastic tubing, fitting tightly into an exentrically drilled hole in the bottom part of the unit, permits a continuous flow of water through the whole column. Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture techniques; Experimental rearing; Instruments. Ano: 1972 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3454 Registros recuperados: 2 Primeira ... 1 ... Última

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