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espanolSe estudio el efecto de la concentracion (20 a 50 °Brix) y la temperatura (20 a 50 °C) sobre la densidad y viscosidad del jugo de uchuva (Physalis peruviana) clarificado, empleando un diseno aleatorio con arreglo de dos factores: temperatura con cinco niveles, concentracion con siete niveles y tres repeticiones. Tambien se determino el punto de congelacion del jugo de uchuva en funcion de la concentracion. Los valores de densidad y viscosidad del jugo disminuyeron al aumentar temperatura y se incrementaron al aumentar la concentracion de solidos solubles. El efecto de la temperatura sobre la viscosidad del jugo a diferentes concentraciones fue descrito por una relacion tipo Arrhenius, encontrandose una energia de activacion de flujo en el rango de 7.02 a 17.62 kJ/mol. Los puntos de congelacion del jugo se calcularon a partir de las curvas de enfriamiento y los resultados se compararon con los estimados a partir de un modelo aplicable a jugos de frutas, con un error relativo promedio del 6.6%. EnglishThe effect of concentration (20 to 50 °Brix) and temperature (20 to 50 °C) on density and viscosity of clarified cape gooseberry (Physalis peruviana) juice was studied, using a randomized arrangement of two factors: temperature with five levels, concentration with seven levels and three repetitions. In addition, the freezing point of cape gooseberry juice at various concentrations was determined. Density and viscosity values of juice decreased with increasing temperature and increased with increasing concentration of soluble solids. The effect of temperature on viscosity at different concentrations of juice was described by an Arrhenius type relationship while the activation energy of flow was found to be in the range of 7.02 to 17.62 kJ/mol. The freezing points of juice at various concentrations were determined based on the cooling curves. The results were compared with those estimated from a model applicable to fruit juices, with an average relative error of 6.6%.

Propiedades Físicas del Jugo de Uchuva (Physalis peruviana) Clarificado en Función de la Concentración y la Temperatura