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Diseño y caracterización de microcápsulas de seleniometionina. Colegio de Postgraduados
Valdiviezo Morales, Liliana.
El objetivo del presente estudio fue diseñar y caracterizar microcápsulas de liberación controlada de seleniometionina de administración vía intramamaria, con dos diferentes de tipos de agentes encapsulantes (carboximetilcelulosa de sodio (NaCMC) y alginato de sodio (/(C6H7NaO6)n)). Las microcápsulas fueron elaboradas por el método de secado por atomización; se utilizó un secador mini Spray-dryer. La caracterización morfológica de las microcápsulas fue mediante microscopía electrónica de barrido. La distribución de las partículas por tamaño para ambos sistemas se determinó con un equipo MasterSize X (1.2b MALVERN) y etilenglicol como dispersante. Se evaluó la cantidad de seleniometionina total encapsulada, el porcentaje de rendimiento, el porcentaje de...
Palavras-chave: Seleniometionina; Microcápsulas; Cinética de liberación; Alginato de sodio; Selenomethionine; Carboximetilcelulosa de sodio; Microcapsules; Release kinetics; Sodium carboxymethylcellulose; Sodium alginate; Maestría; Ganadería.
Ano: 2012 URL: http://hdl.handle.net/10521/738
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Effects of different sources of selenium supplementation on antioxidant indices, biochemical parameters, thyroid hormones and Se status in transition cows Animal Sciences
Khalili, Mohsen; Chamani, Mohammad; Amanlou, Hamid; Nikkhah, Ali; Sadeghi, Ali Asghar.
The aim of this study was to determine the effects of supplementing close-up and fresh dairy cows’ diets with sodium selenite or organic sources of selenium (Se) on the serum biochemical parameters and antioxidant indicators and Se status. Twenty-four multiparous Holstein dairy cows were balanced by body condition score (BCS), previous lactation milk yield and expected calving date and randomly assigned to 1 of 4 experimental treatments. Treatments were: control (basal diet without Se supplementation), sodium selenite supplementation (0.50 mg of Se kg-1 DM; Se-S), selenium yeast supplementation (0.50 mg of Se kg-1 DM; Se-Y) and selenomethionine supplementation (0.50 mg of Se kg-1 DM; Se-M). Serum Se concentrations were higher for cows in Se-Y (72.34 µg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Selenium transition cows Holstein close-up; Dairy cow; Selenomethionine; Sodium selenite; Selenium yeast.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/44392
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Sources and levels of selenium on breast meat quality of broilers Ciência Rural
Boiago,Marcel Manente; Borba,Hirasilva; Leonel,Fábio Roberto; Giampietro-Ganeco,Aline; Ferrari,Fábio Borba; Stefani,Lenita Moura; Souza,Pedro Alves de.
Qualitative characteristics of breast meat of broilers fed diets supplemented with different concentrations (0; 0.3 and 0.5mg kg-1) of selenium in the form of selenomethionine and sodium selenite were analyzed. A total of 1050 one-day-old male Cobb broiler chicks were arranged factorially at random to five treatments (two concentrations x two sources + control diet without addition of selenium) with 7 replications of thirty birds each and received an isonitrogenous and isocaloric diets in all phases according to their ages (1-21, 22-35, and 36-42 days). At 42 days of age, TBARS (thiobarbituric acid reactive substances) after storage at 4ºC for one, seven and 15 days and also after 30 days under freezing temperatures (-15°C), color (CIELab), water holding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Meat quality; Pectoralis major; Selenomethionine; Sodium selenite.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000901692
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