Results 51 to 60 of about 3,243 (136)

Study of water-repellent treatments applied on limestone from Andalusian Cathedrals

Materiales de Construccion, 1991
Five types of stone used in Andalusian Cathedrals have been treated with different water-repellent treatments, to evaluate the effects of this products. The stones studied are limestone, calcarenite and dolomite; the products applied are organosilicones ...
R. Villegas, J. F. Vale, M. Alcalde
doaj   +1 more source

Análisis del efecto de una obra hidráulica en la calidad del agua del Río Teusacá (Cundinamarca, Colombia) a través de la bioindicación con macroinvertebrados acuáticos

Avances
El objetivo principal de esta investigación consiste en analizar el efecto ocasionado por una intervención hidráulica de dragado en el Río Teusacá (Cundinamarca, Colombia), por medio de bioindicación de macroinvertebrados acuáticos.
Cristian-Camilo Lozano-Moreno, Shelsey Alejandra Martinez-Arias, Dayam Soret Calderón-Rivera, Angela-María Jaramillo-Londoño   +3 more
doaj   +1 more source

Influence of dissolved organic carbon on the limnochemical characteristics of a tropical endorheic wetland during a hydrological period: El Eneal Wetland, Colombia

Dyna
The progressive darkening of inland waters globally has been attributed to increasing dissolved organic carbon (DOC) concentrations, yet this phenomenon remains understudied in tropical systems.
Wilfer David Guzman López, Lina Claudia Giraldo , Fabio de Jesús Vélez- Macías, Néstor Aguirre   +3 more
doaj   +1 more source

Efecto del uso de hidrolizado enzimático de proteína de levadura sobre la fermentación y el perfil sensorial del vino

BIO Web of Conferences, 2019
Se evaluó el uso de proteínas de levaduras como fuente de nitrógeno orgánica para la fermentación en reemplazo del diaminofosfato (DAP). Se utilizaron Saccharomyces cerevisiae autoclavadas y posteriormente hidrolizadas con 6.75 mAU/g de subtilisina a pH ...
Valencia P., Rojas P., Urbina C., Urtubia A.   +3 more
doaj   +1 more source

Evaluación de un filtro biológico con material de soporte inorgánico – rocas – a una escala de laboratorio

Revista de Iniciación Científica, 2018
El proyecto consiste en un sistema con material de soporte inorgánico (rocas), que se mantiene en condiciones anaeróbicas (ausencia de oxígeno), en el cual se vierten de una manera intermitente aguas sintéticas con nitrato de potasio (+/-29.4 mg/L).
Ramón Ábrego, Celia Ballesteros, Víctor Cerezo, Yajaira Chung, Cinthia Farrugia, Erick Vallester   +5 more
doaj  

Assessment and Day-Ahead Forecasting of Hourly Solar Radiation in Medellín, Colombia

Energies, 2019
The description and forecasting of hourly solar resource is fundamental for the operation of solar energy systems in the electric grid. In this work, we provide insights regarding the hourly variation of the global horizontal irradiance in Medellín,
Julián Urrego-Ortiz, J. Alejandro Martínez, Paola A. Arias, Álvaro Jaramillo-Duque   +3 more
doaj   +1 more source

Main design parameters to build acoustic maps by measurements in Uruguay

Noise Mapping
Uruguay is a small country in Latin America. It has 178.500 km2 and approximately 3,400,000 inhabitants. Its environmental legislation is still incomplete; for example, there has been a national act about noise pollution since 2004 but it has never been ...
González Alice Elizabeth, Kovar Pablo Gianoli, Dores Ignacio Suárez, Vicente Héctor Campello   +3 more
doaj   +1 more source

Impacts of land use change and climate-forcing scenarios on carbon storage dynamics in the Farallones de Cali national natural park

Environmental and Sustainability Indicators
Forest ecosystems are critical carbon sinks, yet land-use pressure and climate change increasingly threaten their long-term stability. This study aimed to evaluate how land-use trajectories and climate-forcing pathways jointly shape future carbon storage
Nicoll Moyano, Fredy Duque, Karel Sanchez   +2 more
doaj   +1 more source

Calidad de compost obtenido a partir de estiércol de gallina, con aplicación de microorganismos benéficos

Scientia Agropecuaria, 2019
El objetivo de esta investigación fue evaluar la calidad del compost obtenido a partir de estiércol de gallinas, con inoculación de microorganismos benéficos autóctonos.
Manuel Alvarez-Vera, Ana Largo, Sergio Iglesias-Abad, Jorge Castillo   +3 more
doaj   +1 more source

Predictive Model with Machine Learning for Environmental Variables and PM_2.5 in Huachac, Junín, Perú

Atmosphere
PM2.5 pollution is increasing, causing health problems. The objective of this study was to model the behavior of PM2.5AQI (air quality index) using machine learning (ML) predictive models of linear regression, lasso, ridge, and elastic net. A total of 16,
Emery Olarte, Jhonatan Gutierrez, Gwayne Roque, Juan J. Soria, Hugo Fernandez, Jackson Edgardo Pérez Carpio, Orlando Poma   +6 more
doaj   +1 more source