Results 41 to 50 of about 465,414 (171)

Management of Striga asiatica in the vulnerable uplands of Central Madagascar: combining zero-tillage rice-maize cover-crop rotations with resistant varieties [PDF]

open access: yes, 2011
Una de las principales dificultades que se tienen actualmente para diseñar localmente máquinas y herramientas para la extracción de gel de la planta de Aloe Vera, es el desconocimiento de las propiedades mecánicas de sus hojas.
Rodenburg, Jonne   +5 more
core   +3 more sources

Interactions of rare earth elements with living organisms and emerging biotechnical applications

open access: yesPLANTS, PEOPLE, PLANET, Volume 7, Issue 5, Page 1251-1274, September 2025.
Rare earth elements (REEs) are critical resources required to achieve net‐zero carbon emission targets and energy security. However, rising demand for REEs coupled with significant extraction and processing challenges and geopolitical risks restricts access to REE resources.
Samantha A. McGaughey   +6 more
wiley   +1 more source

Variación del estado Refractivo y Agudeza Visual, en pacientes sometidos a Cirugía de Cataratas por las técnicas de Facoemulsificación y Extracción Extracapsular con implante de lentre Intraocular Esféricas, atendidos en la Clínica Ojo Sano de la Ciudad de Managua, de Enero del 2015 a Junio del 2016 [PDF]

open access: yes, 2017
Se realizó un estudio cohorte histórica en la clínica Ojo Sano de la ciudad de Managua en el periodo de Enero del 2015 a Junio del 2016, con el objetivo de demostrar la variación en el estado refractivo y la agudeza visual en los pacientes sometidos a ...
Cisneros Ruíz, Fernando Francisco   +1 more
core  

International consensus principles for the sustainable harvest of polar bears

open access: yesConservation Biology, Volume 39, Issue 4, August 2025.
Abstract Multilateral agreements are required for the effective management of large carnivores with ranges that cross geopolitical boundaries. This is particularly important for species subject to rapid changes in distribution or demographic status due to climate warming. We considered 3 international consensus principles for the sustainable harvest of
Eric V. Regehr   +7 more
wiley   +1 more source

Proceso de extraccion supercritica del aceite esencial de pimienta de jamaica (pimenta dioica l merrill) [PDF]

open access: yes, 2017
Proceso de extracción de aceite esencial de pimienta utilizando la tecnología de fluidos supercríticos.En la extracción de compuestos a partir de fuentes naturales, la tecnología de los fluidos supercríticos ha mostrado ventajas importantes sobre los ...
Andrade Ávila, Yasvet Yaren   +1 more
core  

A computational framework to characterize and compare the tonal repertoires of toothed whales

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 7, Page 1350-1368, July 2025.
Abstract Toothed whales, despite being one of the most acoustically specialized lineages of vertebrates, lack detailed vocal repertoire characterizations comparable to those of songbirds and primates. Current descriptions often lack standardization, limiting interspecies and intraspecies comparisons critical for understanding the contribution of ...
Maia Austin   +7 more
wiley   +1 more source

Caracterización química y cuantificación del rendimiento de extracción de pigmento en siete accesiones mexicanas de Bixa orellana [PDF]

open access: yes, 2016
Achiote (Bixa orellana) is a plant used for obtaining a natural dye rich on carotenoids (mainly bixin and norbixin); it is also the plant species with the highest content of tocotrienols in nature.
Asis, Ramón   +7 more
core  

Abandoned mine land program: Examining public participation in decision‐making

open access: yesReview of Policy Research, Volume 42, Issue 3, Page 629-657, May 2025.
Abstract For centuries, coal extraction and production provided low‐cost energy that powered the American economy. Currently, an estimated 5.5 million people in the Appalachian region live within one mile of an Abandoned Mine Land (AML) site. The site remediation has been funded and promoted by the AML program under the Surface Mining Control and ...
Karsyn Kendrick, Younsung Kim
wiley   +1 more source

El proceso de extracción y comercialización del musgo (Thuidium delicatulum) en el Estado de México [PDF]

open access: yes, 2017
Se analiza el proceso de extracción y comercialización del musgo Thuidium delicatulum en San Bartolo Oxtotitlán, Estado de México. Se pretende caracterizar la forma en que los actores sociales intervienen en el aprovechamiento del musgo en una región ...
ANASTACIO MARTINEZ, NANCY DIANA   +7 more
core  

New opportunities and challenges for conservation evidence synthesis from advances in natural language processing

open access: yesConservation Biology, Volume 39, Issue 2, April 2025.
Abstract Addressing global environmental conservation problems requires rapidly translating natural and conservation social science evidence to policy‐relevant information. Yet, exponential increases in scientific production combined with disciplinary differences in reporting research make interdisciplinary evidence syntheses especially challenging ...
Charlotte H. Chang   +7 more
wiley   +1 more source

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