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	Provedor de dados Ciênc. Tecnol. Aliment. (2) Acta Amazonica (1) Autor SILVEIRA JÚNIOR,Vivaldo (2) ARAÚJO,Luciares Costa de (1) Amorim,Rodrigo César das Neves (1) GUTIÉRREZ,Mirko Salomon Chávez (1) GUTIÉRREZ,Mirko Salomón Chávez (1) MELO,Fernanda Ramos (1) OLIVEIRA,Cintia Melgaço de (1) Pohlit,Adrian Martin (1) Silva,Ellen Cristina Costa da (1) Tadei,Wanderli Pedro (1) Mais... Palavra-chave Recrystallization (3) Temperature oscillations (2) Arrhenius model (1) Caferana (1) Cold chain (1) Empirical model (1) Freezing (1) Quassinoid (1) Simaroubaceae (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2019 (1) 2017 (1) 2009 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Gram-scale isolation of isobrucein B and neosergeolide from Picrolemma sprucei Hook. f. Acta Amazonica Silva,Ellen Cristina Costa da; Amorim,Rodrigo César das Neves; Tadei,Wanderli Pedro; Pohlit,Adrian Martin. Quassinoids neosergeolide and isobrucein B, obtained from Picrolemma sprucei, have proven in vitro antitumor, antimalarial, anthelminthic, cytotoxic, insecticide and leishmanicidal activities. There is interest in the in vivo pharmacological study of these natural compounds and their semi-synthetic derivatives, however, the quantities obtained in previous extraction processes have been shown to be a limiting factor for continuation of these studies. Herein, we describe a method for obtaining grams of these quassinoids whose purification relies only on recrystallization. Tipo: Info:eu-repo/semantics/article Palavras-chave: Caferana; Simaroubaceae; Quassinoid; Recrystallization. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000100026 An empirical model to estimate the growth of ice crystals for storage of Tilapia at variable temperature conditions Ciênc. Tecnol. Aliment. GUTIÉRREZ,Mirko Salomón Chávez; ARAÚJO,Luciares Costa de; SILVEIRA JÚNIOR,Vivaldo. Abstract Empirical models can be used to represent the recrystallization process in frozen food as a simple strategy (limited by the complexity of the process). Anyway, the empirical model has a better fit when used within the range of experimental values from which they were generated. In this work, an empirical mathematical model derived from the Arrhenius equation was proposed, since in previous publications it was shown that there is a direct relation between the growth of ice crystals and the temperature oscillations that occur during the storage of frozen products. Equivalent diameter data of ice crystals obtained from the storage of frozen Tilapia analyzed in the optical microscope was used as a database for the formulation of the empirical model.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Empirical model; Arrhenius model; Recrystallization; Temperature oscillations. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000300567 Limit growth of ice crystals under different temperature oscillations levels in nile Tilapia Ciênc. Tecnol. Aliment. GUTIÉRREZ,Mirko Salomon Chávez; OLIVEIRA,Cintia Melgaço de; MELO,Fernanda Ramos; SILVEIRA JÚNIOR,Vivaldo. Abstract The degenerative effect of temperature fluctuations during storage time is a critical condition that needs to be quantitatively characterized in products where drip losses are appreciable. In this work, real storage conditions were reproduced using freezers modified to cause 3 levels of temperature fluctuation (± 0, ± 3, ± 5; ± 7) during storage of Tilapia (Oreochromis sp), at temperature of –18 °C. The fast frozen tilapia muscle (freezing cabinet) was chosen to quantify the growth of ice crystals according to temperature fluctuations. The identification of crystals in the optical microscope as well as histological treatments and measurements using specific software has shown that the growth of ice crystals in the first days of storage follows an... Tipo: Info:eu-repo/semantics/article Palavras-chave: Freezing; Recrystallization; Cold chain; Temperature oscillations. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000400673 Registros recuperados: 3 Primeira ... 1 ... Última

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