Results 31 to 40 of about 1,668,770 (177)

Composición y distribución de las medusas (Cnidaria: Medusozoa) en la plataforma continental central del Pacifico mexicano

open access: yesRevista Mexicana de Biodiversidad, 2010
Se estudió la composición, distribución y abundancia de la comunidad de medusas de la plataforma continental en el Pacífico mexicano durante agosto 1988. Las muestras de zooplancton provienen de transectos en las zonas externa e interna de la plataforma
Lourdes Segura-Puertas   +4 more
doaj   +1 more source

Analysis of the Restoration of Distribution Substations: A Case Study of the Central–Western Division of Mexico

open access: yesEnergies
The studies on strategies for improving restoration times in electrical distribution systems are extensive. They have theoretically explored the application of mathematical models, the implementation of remotely controlled systems, and the use of digital
Carlos Sánchez-Ixta   +3 more
doaj   +1 more source

Evaluación del riesgo de extinción de Mammillaria pectinifera, cactácea endémica de la región de Tehuacán-Cuicatlán

open access: yesRevista Mexicana de Biodiversidad, 2009
MAMMILLARIA PECTINIFERA (CACTACEAE) ES UNA ESPECIE ENDÉMICA DE LA REGIÓN DE TEHUACÁN-CUICATLÁN EN LOS ESTADOS DE PUEBLA Y OAXACA. AUNQUE EN LA NORMA OFICIAL MEXICANA NOM-059-ECOL-2001 ESTÁ CONSIDERADA COMO AMENAZADA Y ESTÁ INCLUIDA EN EL APÉNDICE I DE ...
AMELIA CORNEJO ROMERO   +7 more
doaj   +1 more source

Diseño de un dispositivo compacto para generar y testear vórtices ópticos [PDF]

open access: yes, 2017
Presentamos un diseño compacto para generar y testear diferentes vórtices ópticos con momento angular orbital (OAM). El diseño consiste en una máscara que contiene un holograma binario y un pinhole.
Capeluto, Maria Gabriela   +3 more
core   +1 more source

Registro del género Aeolosaurus (Sauropoda, Titanosauria) en el del Cretácico tardío de América del Sur: implicaciones paleogeográficas

open access: yesEstudios Geologicos, 2010
El Cretácico Superior de América del Sur ha brindado fósiles del titanosaurio Aeolosaurini Aeolosaurus, de Argentina (de las Formaciones Allen, Los Alamitos, Angostura Colorada y Bajo Barreal) y de Brasil (de las Formaciones Adamantina y Marília).
C. R.A. Candeiro
doaj   +1 more source

Data gaps and heterogeneity limit our understanding of human–wildlife interactions: A continental study of Andean bears

open access: yesPeople and Nature, EarlyView.
Abstract The expansion and intensification of human activities have increased interactions between people and wildlife. Interactions involving bears and other large carnivores are complex and can lead to conflicts. Promoting positive coexistence requires managing information, which is not always available.
Roxana Rojas‐VeraPinto   +2 more
wiley   +1 more source

Diversidad y distribución de los moluscos de agua dulce en la Comunidad de Madrid (España)

open access: yesGraellsia, 2006
El estudio de los moluscos de agua dulce llevado a cabo en la Comunidad de Madrid permite citar 33 especies, de ellas 25 son de gasterópodos y ocho son de bivalvos.
J. Soler   +3 more
doaj   +1 more source

Chalcosicya maya n. sp, a new Mexican species (Coleoptera: Chrysomelidae: Eumoplinae) and its implications for morphology and biogeography [PDF]

open access: yes, 2012
Chalcosicya maya, new species, (Coleoptera: Chrysomelidae: Eumolpinae) is described and the species key of Blake (1951) is modified to accommodate it. This is the first known mainland species of this previously Antillean genus.
Flowers, R. Wills
core   +1 more source

Participatory fuzzy cognitive modelling reveals leverage points for agroecological adoption in the Central Valleys of Oaxaca

open access: yesPeople and Nature, EarlyView.
Abstract Global institutions are increasingly calling for an agroecological transition of our food systems to promote sustainable farmer livelihoods, safeguard agrobiodiversity and foster socio‐ecological resilience to a changing climate. Yet adoption remains limited, and there is a paucity of research examining how local conditions enable and ...
Gabriela Marie Garcia   +5 more
wiley   +1 more source

Coin-Cell Electric Double-Layer Capacitors with African Palm Kernel Activated Carbon Under Series and Parallel Connection

open access: yesNanomaterials
The growing demand for efficient and sustainable energy storage has intensified interest in green materials known for their high-power density. In this work, we evaluated the electrochemical and electrical performance of coin-cell supercapacitors with ...
Chelsy Gaviria   +7 more
doaj   +1 more source

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