Browsing by Autor "Judith Esperanza Zambrano Valera"

Now showing 1 - 2 of 2

Caracterización de frutos de caimito (Chrysophyllum Caínito L) variedades verde y morado e influencia de la época de cosecha en la calidad de los frutos
(2013) Judith Esperanza Zambrano Valera; Natalie Montilla; R Guillermo Riveros; I. Quintero; Miguel A. Maffei Valero; Anne Valera; Willian José Materano Aldana
The Caimito (Chrysophyllum cainito L) belongs to the Sapotaceae family. This family includes trees or shrubs widely distributed in the tropics of both hemispheres. In Venezuela is grown primarily in gardens as an ornamental tree and shadow; however, the fruits have exquisite taste and nutritional value for calcium, phosphorus, vitamins A and C. The objective of the study consisted of the chemical evaluation of the fruits of caimito, varieties green and purple, from an experimental garden established on the farm El Reto, University of the Andes, located in Monay, Trujillo State. The variables evaluated were: titratable acidity, total soluble solids (TSS), SST/Acidity ratio, reducing sugars content, dry matter and moisture content. The experimental design corresponded to a factorial with two factors at two levels each (2²): variety (green and purple) and early and late harvest with ten replications arranged at random. The results for all assessments were processed statistically using analysis of variance by means of the statistical package SAS®. Titratable acidity, reducing sugars content and dry matter were higher for the green variety; while TSS and moisture percent were statistically similar. The TSS/acid ratio was higher in the fruits of the purple variety. The harvest time factor had influence on the majority of the chemical variables
Efecto de diferentes temperaturas de almacenamiento sobre la calidad física en dos cultivares de durazno (Prunus persica L.)
(2014) Karen Yajaira Graterol Uzcátegui; María Pérez de Camacaro; Judith Esperanza Zambrano Valera
The peach fruit production in Venezuela is an activity meant for to the domestic market, with few evaluations of quality and postharvest behavior of fruits. The objective of this research was to evaluate the physical quality of peach cultivars ‘Yellow Creole’ and ‘Jarillazo’ under different temperatures. It was performed in the laboratory of Postharvest Graduate Agronomy, using uniform fruit size, color and apparently free from mechanical damage and pests, category II (86,4 to 106,4 g) from Colonia Tovar, Aragua state, stored at 4 and 10 ± 1 o C. Treatments were arranged in a completely randomized design with factorial arrangement. Physical quality variables were measured in three experiments with four replicates per treatment for a total of 288 fruit evaluated. These were performed every three days until an unacceptable overall quality. The results showed that the cultivar ‘Jarillazo’ had the highest fruit size and higher percentage of pulp to ‘Yellow Creole’. Loss of firmness in the fruit through time was obtained, being higher (0,087 inch) at a temperature of 10 ° C for both cultivars. A loss of the water content, as reflected in the decrease of the variable fresh mass and diameters was obtained. The color indexes allowed to satisfactorily assessing the evolution of color change being faster at 10 ° C than at 4 ° C in both cultivars.