Consulta: creatorFacets:"Vega-Gálvez,Antonio"
Registros recuperados: 4
Data/hora: 03/06/2024 06:20:38

Mathematical modeling of convective air drying of quinoa-supplemented feed for laboratory rats
Provedor de dados: 52
Autores: Vega-Gálvez,Antonio; Dagnino-Subiabre,Alexies; Terreros,Gonzalo; López,Jessica; Miranda,Margarita; Di Scala,Karina.
Drying kinetics of quinoa-supplemented feed for laboratory rats during processing at 50, 60, 70, 80 and 90ºC was studied and modeled in this work. Desorption isotherm was obtained at 60ºC giving a monolayer moisture content of 0.04 g water/g d.m. The experimental drying curves showed that drying process took place only in the falling rate period. Several thin-layer drying equations available in the literature were evaluated based on determination coefficient (r²), sum squared errors (SSE) and Chi-square (χ2) statisticals. In comparison to the experimental moisture values, the values estimated with the Logarithmic model gave the best fit quality (r² &amp;gt;0.994, SSE &lt; 0.00015 and χ2 &lt; 0.00018), showing this equation could predict very accurately the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rat feed; Quinoa; Drying kinetics; Modeling; Statistical test.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100021

Influence of contrasting environments on seed composition of two quinoa genotypes: nutritional and functional properties
Provedor de dados: 117
Autores: Miranda,Margarita; Vega-Gálvez,Antonio; Martínez,Enrique A; López,Jéssica; Marín,Rosa; Aranda,Mario; Fuentes,Francisco.
Quinoa (Chenopodium quinoa Willd.) in Chile represents a source of germplasm with high nutritional value. However, there is little information available related to quinoa seed quality grown under contrasting environments. In this study we evaluated the changes on seed composition of seeds of two lowland/coastal quinoa genotypes grown under arid (Vicuna) and cold-temperate (Temuco) conditions in Chile. Results showed that in the case of 'Regalona Baer' and 'Villarrica' genotypes the arid location (with irrigation) led to a significant increase (P &lt; 0.05) in grain yield (4.2 and 5.1 t ha-1, respectively), soluble dietary fiber (16.8 ± 0.4 and 28.9 ± 2.1 g kg-1 DM, respectively), vitamin B3 (2.44 ± 0.005 and 2.26 ± 0.04 mg 100 g-1 DM, respectively),...
Tipo: Journal article
Palavras-chave: Chenopodium quinoa; Climate stress; Antioxidant activity; Phenolic compounds; Protein; Mineral content.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200004

Antioxidant Capacity and Total Phenolic Compounds of Twelve Selected Potato Landrace Clones Grown in Southern Chile
Provedor de dados: 117
Autores: Ah-Hen,Kong; Fuenzalida,Carolina; Hess,Susan; Contreras,Andrés; Vega-Gálvez,Antonio; Lemus-Mondaca,Roberto.
Colored potatoes (Solanum tuberosum L.) provide a natural source of phytochemicals that help reduce the risk of diseases. However, there is a lack of information on the degree of variation of the antioxidant activity and polyphenolic contents of these native potatoes. Thus, the antioxidant activity (AA) and total phenolic content (TPC) of native Chilean potatoes were determined. Twelve potato landrace clones collected from established cultivations on Chiloe Island and Valdivia were selected. Total phenolic content and AA were compared with two commercial varieties, Shepody and Desirée. Total phenolic content was determined by the Folin-Ciocalteu method, and &amp;#946;-carotene bleaching was used to compare AA. The TPC varied in the peeled potato samples...
Tipo: Journal article
Palavras-chave: Chilean potatoes antioxidant activity total phenolics Folin-Ciocalteu &amp;#946; -carotene.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100001

Nutritional Aspects of Six Quinoa (Chenopodium quinoa Willd.) Ecotypes from three Geographical Areas of Chile
Provedor de dados: 117
Autores: Miranda,Margarita; Vega-Gálvez,Antonio; Quispe-Fuentes,Issis; Rodríguez,María José; Maureira,Héctor; Martínez,Enrique A.
This study explored the diversity of the quinoa crop in Chile from a nutritional perspective. Nutritional properties, minerals, vitamins, and saponin content were assessed in seeds of six Chilean quinoa (Chenopodium quinoa Willd.) ecotypes grown in three main production areas with distinctive climatic and edaphic conditions: Ancovinto and Cancosa in the North-Altiplano or High Plateau, Cáhuil and Faro in the central coastal area, and Regalona and Villarrica in the south of the country. There were significant differences (P &lt; 0.05) in all the nutritional properties of the quinoa seeds in all three areas. Quinoa of the Villarrica ecotype showed the highest protein content (16.10 g 100 g-1 DM) and the highest content of vitamins E and C (4.644 ± 0.240 and...
Tipo: Journal article
Palavras-chave: Quinoa; Vitamins; Minerals; Saponin content; Nutritional properties.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000200002