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Featured researches published by Vilma Quitral.


North American Journal of Aquaculture | 2012

Changes in Freshness during Frozen Storage of Farmed Coho Salmon: Effect of Replacement of Synthetic Antioxidants by Natural Ones in Fish Feeds

Jaime Ortiz; Juan P. Vivanco; Vilma Quitral; María Angélica Larraín; Gabriela Concha; Santiago P. Aubourg

Abstract The addition of antioxidants to the diets for salmonids is crucial to prevent or delay deterioration of fish muscle. Most of the antioxidants used in these diets are synthetic, and their safety is more and more being questioned. The aim of this research was to compare the effects of substituting synthetic antioxidants with natural ones on selected biochemical freshness indicators of frozen coho salmon Oncorhynchus kisutch muscle. Three different feeds were tested: a conventional diet with the synthetic antioxidants butylated hydroxytoluene and ethoxyquin (diet 1) was supplied to farmed coho salmon in parallel with two different diets that included natural antioxidants (a tocopherol isomer-rich mixture [diet 2] and a tocopherol isomer–rosemary extract mixture [diet 3]). Five individuals of each group were analyzed every 3 months during frozen storage. The biochemical indicators measured were total volatile basic nitrogen (TVB-N), dimethylamine content, formaldehyde content, and tissue pH. Levels o...


Revista chilena de nutrición | 2015

Efecto del contenido de sal en la calidad sensorial de pan

Vilma Quitral; María José Reyes; Diego Albornoz; Anna Pinheiro

El objetivo del trabajo fue evaluar el efecto del contenido de sal en la calidad sensorial del pan. Para ello se analizaron muestras de pan con sal y pan sin sal, frescos y con un dia de almacenamiento. Se aplico una prueba de intensidad de atributos sensoriales con escala no estructurada de 15 cm para los atributos de aroma, sabor y firmeza, con un panel entrenado de 8 personas. El aroma tipico era mas pronunciado en el pan con sal, tanto fresco como de un dia de almacenamiento (8,6 y 4,8 puntos respectivamente), comparado con el pan sin sal (7,7 y 4,4 puntos). El sabor caracteristico fue mas pronunciado en el pan con sal, siendo significativamente mayor respecto al pan sin sal, tanto fresco (8,4 y 3,5 puntos respectivamente) como de un dia de almacenamiento (7,3 y 3,8 puntos respectivamente). El pan fresco, con y sin sal, era blando (4 y 4,2 puntos respectivamente), con un dia de almacenamiento aumenta la firmeza, sobre todo en el pan sin sal (7 y 9,7 puntos). El pan con sal presento mejor calidad sensorial que el pan sin sal. La sal juega un importante rol en el perfil sensorial del pan, mejorando el aroma, sabor y textura.


Lwt - Food Science and Technology | 2009

Chemical changes during the chilled storage of Chilean jack mackerel (Trachurus murphyi): Effect of a plant-extract icing system

Vilma Quitral; Ma Luisa Donoso; Jaime Ortiz; Ma Victoria Herrera; Héctor Araya; Santiago P. Aubourg


European Journal of Lipid Science and Technology | 2009

Functional and nutritional value of the Chilean seaweeds Codium fragile, Gracilaria chilensis and Macrocystis pyrifera

Jaime Ortiz; Edgar Uquiche; Paz Robert; Nalda Romero; Vilma Quitral; Catherine Llantén


Journal of the American Oil Chemists' Society | 2007

Development of Lipid Changes Related to Quality Loss During the Frozen Storage of Farmed Coho Salmon (Oncorhynchus kisutch)

Alicia Rodríguez; Vanesa Losada; M. Angélica Larraín; Vilma Quitral; Julia Vinagre; Santiago P. Aubourg


Food Chemistry | 2007

Autolytic degradation and microbiological activity in farmed Coho salmon (Oncorhynchus kisutch) during chilled storage

Santiago P. Aubourg; Vilma Quitral; M. Angélica Larraín; Alicia Rodríguez; Julio Gómez; Liliana Maier; Julia Vinagre


European Journal of Lipid Science and Technology | 2005

Rancidity development during the chilled storage of farmed Coho salmon (Oncorhynchus kisutch)

Santiago P. Aubourg; Julia Vinagre; Alicia Rodríguez; Vanesa Losada; M. Angélica Larraín; Vilma Quitral; Julio Gómez; Liliana Maier; Emma Wittig


Food Chemistry | 2002

Capillary zone electrophoresis as a method for identification of golden kinglip (Genypterus blacodes) species during frozen storage

María Angélica Larraín; Lilian Abugoch; Vilma Quitral; Julia Vinagre; C Segovia


Grasas Y Aceites | 2009

Development of spreadable olive paste from the Sevillana variety

Marco Schwartz; Vilma Quitral; Claudia Daccarett; Julio Callejas


Revista Iberoamericana de Tecnología Postcosecha | 2013

ANTIOXIDANT CAPACITY AND TOTAL POLYPHENOL CONTENT IN DIFFERENT APPLE VARIETIES CULTIVATED IN CHILE

Vilma Quitral; Marcela Sepúlveda; Marco Schwartz

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Santiago P. Aubourg

Spanish National Research Council

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