11 articles in this issue
Ignacio de los Ríos, Sheila Serrano
Editorial
Jimmy Quisirumbay-Gaibor
Vitamin D, calcium and phosphorus are essential nutrients necessary for efficient bone mineralization, immuno-modulation and reproduction. Vitamin D is synthesized in the body after exposure to sunlight, it can also be provided through the diet in its D2 ... see more
Leonard Pagliaro, Daniel A. Lowy
A careful methodology to monitor binder degrading phenomena in alkaline media is proposed, which should assist experts in ?eld of battery research and development, as it can evaluate the expected stability of ?uorinated binders, prior to being tested in a... see more
Pablo Emilio Escamilla-García
This paper highlights a comparative analysis of biogas emissions produced in a Mexican landfill. The Mexican biogas model, the model of the Environmental Protection Agency of the United States of America (EPA) were applied in order to compare results with... see more
Edwin Rolando Jiménez Ruiz, William Fonseca González, Leticia Pazmiño Pesantez
In this work both the biomass and carbon present in a vegetative cover from a silvopastoral system were quanti?ed. The system, composed of Hyparrhenia rufa and Guazuma ulmifolia, was established naturally in Balzar, Guayas province of Ecuador. By using a ... see more
Paola Jackeline Duque-Sarango, Ronald Cajamarca-Rivadeneira, Beverley C. Wemple, Manuel E. Delgado-Fernández
The present study seeks to estimate the water balance that results as a product of the variation of precipitation and temperature over the Chaquilcay microcatchment, a natural system that intercepts with the surface of the Aguarongo Protected Forest in Gu... see more
Andrea Gabriela Bonilla Bolaños, David Alejandro Singaña Tapia
This article deals with the indirect effects of looking for increasing agricultural productivity by using high-yielding varieties (HYVs) in association with chemical fertilizers and agro-chemicals – according to the Green Revolution dynamics. The so-calle... see more
Pablo Roberto Marini, Ricardo José Di Masso
The objective of this study was to analyze the relationship between age at first calving with dairy production and reproductive indicators in dairy cows, with different productive potential. Retrospective data of 260 Holstein American-Canadian biotype cow... see more
Rocio Contero, Elena Aquino, Paola Simbaña, Connie Gallardo, Rachel Bueno
The dairy industries in Ecuador, in response to the social demand for quality products, implement control programs that demand more laboratory analysis such as the total bacteria count (TBC) as a parameter of the hygienic quality in raw milk, ... see more
Cristina López, Carlos Ernesto González Gallardo, M.J. Guerrero Ochoa, Gabriel Mariño, Belén Jácome, Elena Beltrán Sinchiguano
At present there is an important interest in the study of foods that contain antioxidant compounds. Many investigations have determined that the flower of jamaica is rich in phenolic compounds mainly anthocyanins and flavonoids such as delphinidin-3-sambu... see more
Mónica Judith Espadero Bermeo, Hernán Avilés, Lilia Marlene Armijos Rodríguez, Luis Enrique Ávila Granda, Lidia Idrovo, María Idrovo, Christian Oyola
Euphorbia aff. Viridis (Klotzsch & Garcke) boiss, a plant species belonging to the Euphorbiaceae family, is one of the most diverse of the American continent, and is used in multiple treatments in ancestral medicine in the Ecuadorian Andes. In the present... see more