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| 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 β-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 β -carotene. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100001 |
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| Vega-Gálvez,Antonio; Palacios,Marlene; Boglio,Francisca; Pássaro,Catarina; Jeréz,Catalina; Lemus-Mondaca,Roberto. |
| El objetivo de este trabajo fue estudiar la cinética de deshidratación osmótica de la papaya chilena (Vasconcellea pubescens), utilizando dos variables experimentales: la temperatura (30, 40, 50 °C) y concentración (40, 50 y 60%) de la solución osmótica. Se determinó la variación de masa total, masa de agua y masa de sólidos solubles y se modeló con las ecuaciones difusionales, además en esta investigación se consideró y utilizó una modificación de la ecuación propuesta por Biswal-Bozorgmehr. Estos modelos fueron evaluados por medio del coeficiente de regresión lineal, suma de errores cuadrados, raíz media de los errores cuadrados y Chi-cuadrado. Al comparar los valores experimentales con los calculados, se demostró que el modelo Biswal-Bozorgmehr... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Papaya chilena; Difusividad efectiva; Modelos cinéticos. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612007000300008 |
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| Vega-Gálvez,Antonio; Lemus-Mondaca,Roberto; Plaza-Sáez,Daniel; Pérez-Won,Mario. |
| The aim of this research was to study the effect of air-temperature and diet composition on the mass transfer kinetics during the drying process of pellets used for Japanese Abalone (Haliotis discus hannai) feeding. In the experimental design, three temperatures were used for convective drying, as well as three different diet compositions (Diets A, B and C), in which the amount of fishmeal, spirulin, algae, fish oil and cornstarch varied. The water diffusion coefficient of the pellets was determined using the equation of Fick's second law, which resulted in values between 0.84-1.94×10-10 m²/s. The drying kinetics was modeled using Page, Modified Page, Root of time, Exponential, Logarithmic, Two-Terms, Modified Henderson-Pabis and Weibull models. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Japanese abalone; Pellets; Drying kinetics; Diffusion coefficient; Weibull. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000300022 |
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