Results 21 to 30 of about 354,337 (163)

Análisis multivariado de la fertilidad de los suelos en sistemas de café orgánico en Puente Abadía, Villavicencio

Revista U.D.C.A Actualidad & Divulgación Científica, 2017
Puente Abadía es una zona cafetera por excelencia, del municipio de Villavicencio, Departamento del Meta, Colombia, donde se cultivan sistemas de café orgánico (SCO).
Amanda Silva-Parra, Carlos Colmenares-Parra, Jorge Álvarez-Alarcón   +2 more
doaj   +1 more source

POTENCIAL USO DE NANOMATERIALES COMBINADOS CON ÁCIDO POLILÁCTICO (PLA) EN PRÓTESIS ORTOPÉDICAS: UNA REVISIÓN

infoANALITÍCA, 2022
Los materiales tradicionales derivados del petróleo como el polietileno y polipropileno son los más empleados en el campo de la protésica, sin embargo, la tendencia a la protección del medio ambiente amerita el análisis de nuevos materiales ...
Fabricio Campaña G., Jorge Uquillas S., Estefanía Villamarín B., Gabriela Yánez-Jácome, David Romero-Estévez, Fernanda Pilaquinga F.   +5 more
doaj   +1 more source

Estudios de relación estructura-propiedad: oportunidad para enseñar e investigar en condiciones modestas

Educación Química, 2018
La utilidad prácticay comercial de una sustancia depende de sus propiedades físicas, químicas, biológicas, etcétera. También, cuando se lleva a cabo algún experimento químico, es conveniente conocer las propiedades de los reactivos para manejarlos ...
Jacinto G. Rodríguez, María Lydia Berlanga, Gabriel Gojón Zorrilla   +2 more
doaj   +1 more source

Propiedades físico-químicas de membranas PDMS empleadas en lentes líquidas [PDF]

, 2009
The transparent elastomer Polydimethylsiloxane (PDMS) Sylgard 184 is increasingly used in optical applications, as in the manufacture of microlens with variable focal length, in waveguides (optical fibers) or to produce lenses doublets; this is all due ...
SERGIO VAZQUEZ Y MONTIEL
core  

Assessing contributions of deterministic versus stochastic processes to local species assembly: A field experiment with annual plant‐dominated communities in gypsum systems

Journal of Ecology, Volume 114, Issue 3, March 2026.
In this study, we experimentally show that stochasticity can play prominent roles in driving local species assembly in annual plant‐dominated communities of semiarid gypsum ecosystems. Drylands are traditionally viewed as restrictive environments that impose strong deterministic filtering effects, but neutral events can also contribute decisively to ...
Laura Ortiz, Arantzazu L. Luzuriaga, Lars Götzenberger, Pablo Ferrandis   +3 more
wiley   +1 more source

Relationship between Polymer Dielectric Constant and Percolation Threshold in Conductive Poly(styrene)‐Type Polymer and Carbon Black Composites

Journal of Nanomaterials, Volume 2015, Issue 1, 2015., 2015
We study the effect of dielectric constant of some poly(styrene)‐type polymer matrix on the percolation threshold in conductive polymer composites with carbon black (CB). We demonstrate that percolation threshold diminishes with an increment of the dielectric constant of polymer matrix. We chose polystyrene and other three polymers similar in structure
Mariana Castro Martínez, Susana Hernández López, Enrique Vigueras Santiago, Wei Liu   +3 more
wiley   +1 more source

Multidimensional Perspective on the Quality of Green Onion: Between the Visible, the Measurable, and the Perceived

Food Science &Nutrition, Volume 14, Issue 2, February 2026.
This graphical abstract presents a five‐phase framework to define green onion quality by integrating literature evidence, physicochemical and bioactive data, digital trends, field damage observations, and consumer perception, providing a multidimensional and measurable quality assessment.
Leslie Walessa Castaño‐Tarazona, Juan Camilo Henao‐Rojas, Joaquín Guillermo Ramírez‐Gil   +2 more
wiley   +1 more source

Vibrational Order, Structural Properties, and Optical Gap of ZnO Nanostructures Sintered through Thermal Decomposition

Journal of Nanomaterials, Volume 2014, Issue 1, 2014., 2014
The sintering of different ZnO nanostructures by the thermal decomposition of zinc acetate is reported. Morphological changes from nanorods to nanoparticles are exhibited with the increase of the decomposition temperature from 300 to 500°C. The material showed a loss in the crystalline order with the increase in the temperature, which is correlated to ...
Alejandra Londono-Calderon, Fernando F. Jurado-Lasso, Juan D. Romero-Salazar, Nathaly Jurado-Lasso, J. Fabian Jurado, Shadi A. Dayeh   +5 more
wiley   +1 more source

Contrasting effects of vertebrate and invertebrate herbivores on leaf litter decomposition in terrestrial ecosystems: A meta‐analysis

Functional Ecology, Volume 39, Issue 12, Page 3372-3384, December 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Herbivores influence litter quality, soil properties and decomposer communities, with cascading effects on litter decomposition. Vertebrate and invertebrate herbivores can affect decomposition through the same two pathways (litter quality‐ and soil‐mediated) but are ...
M. Paz Tapella, Carolina Quintero, Mariano A. Rodriguez‐Cabal, Yamila Sasal, M. Noelia Barrios‐Garcia   +4 more
wiley   +1 more source

Cellulose‐Based Polymer Composite with Carbon Black for Tetrahydrofuran Sensing

International Journal of Polymer Science, Volume 2013, Issue 1, 2013., 2013
This work focused on studying the sensing efficiency of tetrahydrofuran (THF) by composite films made of thin layers of a cellulose‐based polymer and carbon black. We analyze the reproducibility, durability, desorption time, and the sensitivity percent as a function of the amount of solvent.
Susana Hernández-López, Enrique Vigueras-Santiago, Miriam Mendoza Mora, José Rurik Farias Mancilla, Erasto Armando Zaragoza Contreras, Gonzalo Martínez-Barrera   +5 more
wiley   +1 more source