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      Propiedades fisicoquímicas y aceptabilidad sensorial de yogur de leche descremada de cabra frutado con mango y plátano en pruebas aceleradas Translated title: Physicochemical properties and sensory acceptability of goat’s milk fruit yogurts with mango and banana using accelerated testing

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          Abstract

          Dos tipos de yogur de leche descremada de cabra (3% de grasa) frutado con mango (YM) y plátano (YP) fueron almacenados a temperaturas de 5 °C, 15 °C y 25 °C durante 72 horas. Cada 24 horas se analizó el pH, acidez titulable, sólidos totales, grasa y proteína. Asimismo se evaluó la aceptabilidad sensorial con 75 consumidores habituales de yogur, que respondieron con “sí” o “no” a la pregunta ¿consumiría este producto?. Al inicio, el pH, acidez, sólidos totales, grasa y proteína fue 4,35 y 4,36; 0,76% y 0,75%; 12,71% y 13,23%; 3,2% y 3,3%; 4,4% y 4,5%, respectivamente para el YM y el YP, cumpliendo con normas conocidas para yogur de leche de vaca: rango de acidez 0,5%-1,6%, grasa valor máximo 15% y proteína valor mínimo 2,7%. La aceptabilidad sensorial del YM y el YP fue alta, con 88,9% y 94,7%, respectivamente. Durante el almacenamiento en condiciones aceleradas, el pH disminuyó hasta 3,88 y 3,92; la acidez titulable aumentó hasta 1,1% y 0,93%; los sólidos totales, grasa y proteína disminuyeron hasta 9,37% y 9,7%; 2,4% y 2,0%; 2,5% y 2,6%, respectivamente para el YM y el YP, permaneciendo dentro de los límites de las normas consultadas. La aceptabilidad sensorial disminuyó hasta 4% y 5,33% para el YM y el YP respectivamente. Estimando así la vida útil de la aceptabilidad sensorial (V.U.A.S.) a 4ºC en 69 y 49 h (para un porcentaje de rechazo de 25%), 193 y 111 h (para un porcentaje de rechazo de 50%) para el YM y el YP respectivamente.

          Translated abstract

          Two types of skimmed (fat 3%) goat’s milk fruit yogurt with mango (YM) and banana (YB) were stored at temperatures of 5 °C, 15 °C and 25 °C for 72 hours. Every 24 hours the pH, titratable acidity, total solids, fat and protein were analyzed. Sensory acceptability was also evaluated with 75 yogurt frequent consumers, who responded with "yes" or "no" to the question ¿would you consume this product? At the beginning pH, acidity, total solids, fat and protein were 4.35 and 4.36; 0.76% and 0.75%; 12.71% and 13.23%; 3.2% and 3.3%; 4.4% and 4.5%, for the YM and YB respectively, meeting known standards for cow's milk yogurt: range of acidity 0.5%-1.6%, fat maximum value 15% and protein minimum value 2.7%. The sensory acceptability of the YM and the YB was high, with 88.9% and 94.7%, respectively. During storage under accelerated conditions, pH decreased to 3.88 and 3.92; titrable acidity increased to 1.1% and 0.93%; total solids, fat and protein decreased to 9.37% and 9.7%; 2.4% and 2.0%; 2.5% and 2.6%, for the YM and YB respectively, while remaining within the limits of the standards consulted. The sensory acceptability decreased to 4% and 5.33% for YM and YB respectively. Therefore the shelf life of the sensory acceptability was estimated (S.S.A) at 4°C in a rejection percentage of 25% and 50%, 69 and 49 h; 193 and 111 h, for the YM and YB respectively.

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          Most cited references30

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          Probiotic viability and physico-chemical and sensory properties of plain and stirred fruit yogurts made from goat’s milk

          Probiotic plain and stirred fruit yogurts were made from goat's milk using bacterial cultures comprising, Lactobacillus acidophilus LA-5, Bifidobacterium animalis subsp. lactis BB-12 and Propionibacterium jensenii 702. The products were stored at 4°C for 4weeks, during which time the viability of the yogurt starter culture and probiotic bacteria was analysed weekly. P. jensenii 702 demonstrated the highest viability (10(8)cfu/g) in all types of yogurt throughout the storage period, while the viability of the bifidobacteria (∼10(7)cfu/g) also remained above the minimum therapeutic level. The viability of L. acidophilus LA-5 fell below 10(6)cfu/g in yogurts, however, the addition of fruit juice appeared to support the viability of lactobacilli, with higher microorganism numbers observed in fruit yogurts than in plain yogurt throughout the shelf life. Addition of fruit juice significantly increased the syneresis, and decreased viscosity and water holding capacity of yogurts (p<0.05), and also enhanced their sensory acceptability.
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            Specialty products made from goat milk

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              Microbial, physical and sensory properties of yogurt supplemented with lentil flour

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                agro
                Scientia Agropecuaria
                Scientia Agropecuaria
                Universidad Nacional de Trujillo. Facultad de Ciencias Agropecuarias (Trujillo, , Peru )
                2077-9917
                July 2015
                : 6
                : 3
                : 177-189
                Affiliations
                [02] Trujillo orgnameUniversidad Nacional de Trujillo orgdiv1Escuela de Ingeniería Agroindustrial Perú
                [01] Trujillo orgnameUniversidad Nacional de Trujillo orgdiv1Instituto Regional de Investigación Agraria Perú vvasquez@ 123456unitru.edu.pe
                Article
                S2077-99172015000300004
                10.17268/sci.agropecu.2015.03.04
                ef5937e5-dce4-4059-b9bd-fcdc70a03efd

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 22 September 2015
                : 14 May 2015
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 51, Pages: 13
                Product

                SciELO Peru


                yogur de leche de cabra,leche descremada de cabra,pruebas aceleradas,vida útil,cinética de reacciones,goat's milk yogurt,skimmed goat’s milk,accelerated testing,shelf life,reactions kinetics

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