Results 21 to 30 of about 659,179 (111)

Enantioselective Biomimetic Structures Inspired by Oxi-Dase-Type Metalloenzymes, Utilizing Polynuclear Compounds Containing Copper (II) and Manganese (II) Ions as Building Blocks

Biomimetics, 2023
This study focuses on developing and evaluating two novel enantioselective biomimetic models for the active centers of oxidases (ascorbate oxidase and catalase).
Didier Gómez, Jorge Acosta, Horacio López-Sandoval, Ricardo A. Torres-Palma, Yenny Ávila-Torres   +4 more
doaj   +1 more source

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

Molecules, 2021
This study aimed to understand the adsorption process of cephalexin (CPX) from aqueous solution by a biochar produced from the fiber residue of palm oil.
Nancy Acelas, Sandra M. Lopera, Jazmín Porras, Ricardo A. Torres-Palma   +3 more
doaj   +1 more source

Biochar de biomasa residual de eucalipto (Eucalyptus globulus) mediante dos métodos de pirólisis

Manglar, 2020
El presente estudio se basa en la determinación de procedimientos adecuados para los procesos de transformación de la materia orgánica por acción de operaciones de pirolisis rápida y lenta.
Sergio Iglesias Abad, Manuel Alvarez Vera, Jacinto Vázquez, Carlos Salas Macías   +3 more
doaj   +1 more source

γ-Valerolactone Production from Levulinic Acid Hydrogenation Using Ni Supported Nanoparticles: Influence of Tungsten Loading and pH of Synthesis

Nanomaterials, 2022
γ-Valerolactone (GVL) has been considered an alternative as biofuel in the production of carbon-based chemicals; however, the use of noble metals and corrosive solvents has been a problem. In this work, Ni supported nanocatalysts were prepared to produce
Gerardo E. Córdova-Pérez, Jorge Cortez-Elizalde, Adib Abiu Silahua-Pavón, Adrián Cervantes-Uribe, Juan Carlos Arévalo-Pérez, Adrián Cordero-Garcia, Alejandra E. Espinosa de los Monteros, Claudia G. Espinosa-González, Srinivas Godavarthi, Filiberto Ortiz-Chi, Zenaida Guerra-Que, José Gilberto Torres-Torres   +11 more
doaj   +1 more source

Facile Synthesis of ZnO-CeO₂ Heterojunction by Mixture Design and Its Application in Triclosan Degradation: Effect of Urea

Nanomaterials, 2022
In this study, simplex centroid mixture design was employed to determine the effect of urea on ZnO-CeO. The heterojunction materials were synthesized using a solid-state combustion method, and the physicochemical properties were evaluated using X-ray ...
Antonia Cáceres-Hernández, Jose Gilberto Torres-Torres, Adib Silahua-Pavón, Srinivas Godavarthi, David García-Zaleta, Rafael Omar Saavedra-Díaz, Renan Tavares-Figueiredo, Adrián Cervantes-Uribe   +7 more
doaj   +1 more source

Methods involved in the treatment of four representative pharmaceuticals in hospital wastewater using sonochemical and biological processes

MethodsX, 2023
A primary pollution source by pharmaceuticals is hospital wastewater (HWW). Herein, the methods involved in the action of a biological system (BS, aerobic activated sludge) or a sonochemical treatment (US, 375 kHz and 30.8 W), for degrading four relevant
Efraím A. Serna-Galvis, Javier Silva-Agredo, Félix Hernández, Ana M. Botero-Coy, Ricardo A. Torres-Palma   +4 more
doaj   +1 more source

A critical review on the sonochemical degradation of organic pollutants in urine, seawater, and mineral water

Ultrasonics Sonochemistry, 2022
Substances such as pharmaceuticals, pesticides, dyes, synthetic and natural hormones, plasticizers, and industrial chemicals enter the environment daily. Many of them are a matter of growing concern worldwide.
Efraím A. Serna-Galvis, Jazmín Porras, Ricardo A. Torres-Palma   +2 more
doaj   +1 more source

Description of three new species of frogs in the genus Pristimantis (Anura: Terrarana: Strabomantidae) of the cloud forests in the Metropolitan District of Quito, Ecuador

ACI Avances en Ciencias e Ingenierías, 2010
We describe three new species of frogs Pristimantis from the Distrito Metropolitano de Quito based on material collected by expedition of the Museo Ecuatoriano de Ciencias Naturales.
Mario H. Yánez-Muñoz, Paúl A. Meza-Ramos, Diego F. Cisneros-Heredia, Juan Pablo Reyes-Puig   +3 more
doaj   +1 more source

Valoración del impacto ambiental para la propuesta de remediación del pasivo de relaves la polvareda, Pisco – 2018 [PDF]

, 2018
Cumpliendo con el Reglamento de Grados y Títulos de la Universidad Nacional Daniel Alcides Carrión, presento la Tesis Intitulada “VALORACIÓN DEL IMPACTO AMBIENTAL PARA LA PROPUESTA DE REMEDIACIÓN DEL PASIVO DE RELAVES LA POLVAREDA, PISCO – 2018” para ...
Vicente Guerra, Marilia Marilling
core   +4 more sources

La remediación ambiental por contaminación del aire en la actividad alfarera aplicando el buen vivir

, 2015
1. Fundamentos Teóricos. --2 Metodología. --3.Resultados. --4. Conclusiones Y RecomendacionesEl objetivo de la presente investigación es desarrollar los fundamentos jurídicos que permitan la remediación ambiental por contaminación del aire en la ...
Salazar Rubio, Andrea Virginia
core   +2 more sources