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	Provedor de dados BABT (3) Autor Schmalko,Miguel E. (3) Berlingheri,Rubén D. (1) Escalada,Andrea M. (1) Ferreira,Darío (1) Känzig,Rodolfo G. (1) Morawicki,Rubén O. (1) Ramallo,Laura A. (1) Sambiassi,César (1) Mais... Palavra-chave Yerba maté (3) Chlorophyll stability (1) Controlled atmosphere (1) Degradation (1) Dimethoate (1) Ilex paraguariensis (1) Optimization (1) Pesticide (1) Processing (1) Soluble compounds (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2002 (2) 1999 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Dimethoate degradation in plants and during processing of yerba maté leaves BABT Schmalko,Miguel E.; Ramallo,Laura A.; Ferreira,Darío; Berlingheri,Rubén D.. The objective of this research was to study degradation kinetics of dimethoate in plants of Ilex paraguariensis Saint Hilaire (or yerba maté) and during its processing. To determine dimethoate concentration, a capillary gas chromatography technique with a mass selective detector was used. Half-life times in plants ranked between 9.8 and 11.8 days. During processing, with a blanching and two drying steps, dimethoate concentration decayed to a 22.7% of its initial value (in dry basis); while during seasoning step (at 45°C), half-life time was 17.3 days. With these values, preharvest safety interval was determined. Tipo: Info:eu-repo/semantics/article Palavras-chave: Dimethoate; Pesticide; Degradation; Processing; Ilex paraguariensis; Yerba maté. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600003 Extraction optimization of soluble compounds of yerba maté BABT Sambiassi,César; Escalada,Andrea M.; Schmalko,Miguel E.. The objective of this research was the extraction optimization of water soluble compounds of yerba maté. Measures variables were extract concentration and weight of leaves and twigs. Controlled variables were time and temperature of extraction and water/solid relation. A surface response method of three variables was used as experimental design, with 20 experiences in each case. The range of each variable, defined in the experimental design, was: extraction time, 13.2 to 46.8 minutes; temperature, 48.2 to 81.8°C and water solid relation, 4.64 to 11.36 g water/100 g of dry solid. Extract weight varied from 13.14 to 29.56 g in leaves and 8.98 to 16.32 g in twigs (each one per 100 g of dry solid). Extract concentration varied between 2.17 and 3.43 g/100 ml in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Yerba maté; Soluble compounds; Optimization. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200010 Chlorophyll stability in yerba maté leaves in controlled atmospheres BABT Morawicki,Rubén O.; Schmalko,Miguel E.; Känzig,Rodolfo G.. The objective of this research was to investigate the stability of chlorophyll in yerba maté leaves in controlled atmospheres of CO2/air mixtures and different water activities at 25°C.Two levels of water activity were selected corresponding to saturated salt solutions of LiCl (a w=0.113) and MgCl2(a w=0.330) and three levels of CO2/air mixtures (0/100,20/80 and 40/60). The chlorophyll content was evaluated using a liquid chromatography HPLC technique. Experimental values varied between 2.16 and 0.61 mg/g of dry matter. For each sample, 5 determination were made during 58 days. Experimental values were fitted to an equation describing a first order reaction. In all cases, the agreement was good with P<3 10-3. The initial concentration of chlorophyll... Tipo: Info:eu-repo/semantics/article Palavras-chave: Yerba maté; Chlorophyll stability; Controlled atmosphere. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100012 Registros recuperados: 3 Primeira ... 1 ... Última

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