Browsing by Autor "Miguel A. Maffei Valero"

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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
Comparación morfométrica y de los rendimientos cárnicos de dos especies piscícolas continentales criadas en el estado Trujillo, Venezuela
(2017) Daniel Antonio Perdomo; Katiuska Castellanos; Miguel A. Maffei Valero; José David Gechele; Zenaida Corredor; José Arnoldo Piña; Moises David Martínez; Anthony José Naranjo
A comparative study of morphometric and meat yields two freshwater fish, cachama (Colossoma macropomum) and Nile tilapia (Oreochromis niloticus, Chitralada strain), farmed under intensive conditions in Trujillo state, Venezuela; using a completely randomized design was conducted. The morphometric variables related to total length (LT), standard length (LS), head length (LC), head height (AC), body longitude (LTr), body thickness (ET) were determined. Morphometric relations measured were: head length/head height (LC/AC), head length/standard length (LC/LS), head length/total length (LC/LT), body longitude/body thickness (LTR/ET), body longitude/standard length (LTr/LS), standard length/total length (LS/LT). The carcass yield (%RC), fillet yield (%RFi) and waste (%R) was determined as beefing variables. The morphometric parameters and weight variables showed significant differences in favor of C. macropomum (P 0,05) for fish species.
Productividad y calidad fisiológica de semillas de plantas de frijol sometidas a desecación por herbicidas en diferentes etapas fenológicas
(Universidad Centroccidental Lisandro Alvarado, 2022) Iasmin Kele Amancio Costa da Silva; Paulo Roberto Ribeiro Rocha; Oscar José Smiderle; Sonicley da Silva Maia; Thaís Santiago Castro; Glauber Ferreira Barreto; Miguel A. Maffei Valero
https://orcid.org/0000-0001-5234-5156