Results 61 to 70 of about 101,986 (266)

Heavy metals as an indicator of ecological impact of a fragmented land uses, San Luis Potosi, Mexico [PDF]

, 2012
La necesidad de estudiar la presencia de metales pesados en el suelo radica en su impacto como indicador de contaminación ambiental. Se determinó la presencia de Cu, Zn, Pb y Cd en suelos donde se distribuyen especies vegetales en un corredor ecológico ...
Alcalá Jáuregui, Jorge, Beltrán Morales, F. Alfredo, Hernández Montoya, Alejandra, Loya Ramírez, J. Guadalupe, Rodríguez Fuentes, Humberto, Rodríguez Ortíz, Juan C., Ávila Castorena, Cecilia   +6 more
core  

Water Parameters and Hydrodynamics in Rivers and Caves Hosting Astyanax mexicanus Populations Reveal Macro‐, Meso‐ and Microhabitat Characteristics

Ecology and Evolution, Volume 16, Issue 1, January 2026.
From 2009 to 2025, we have recorded the physicochemical parameters of the water and the hydrological regimes at localities hosting Astyanax mexicanus cavefish and surface fish populations in Mexico. Sampling 13 caves and 30 surface stations revealed strong signatures of the two macrohabitats, but also significant differences in specific water ...
Laurent Legendre, Stéphane Père, François Rebaudo, Luis Espinasa, Joël Attia, Sylvie Rétaux   +5 more
wiley   +1 more source

Improved Operation of the Modified Non-Inverting Step-Down/Up (MNI-SDU) DC-DC Converter

Micromachines
This paper presents an enhanced operation strategy for a recently proposed converter called Modified Non-Inverting Step-Down/Up (MNI-SDU) DC-DC converter intended for battery voltage regulation.
Juan A. Villanueva-Loredo, Julio C. Rosas-Caro, Panfilo R. Martinez-Rodriguez, Christopher J. Rodriguez-Cortes, Diego Langarica-Cordoba, Gerardo Vazquez-Guzman   +5 more
doaj   +1 more source

Compost obtained from feces of dairy cattle vs. fertilizer on triticale production (X Triticum secale Wittmack) [PDF]

, 2016
El uso de abono es cada vez más frecuente en la agricultura por su efecto positivo sobre la fertilidad del suelo. El objetivo del presente estudio fue determinar la altura de planta, número de tallos por m2, longitud foliar, número de hojas por tallo y ...
Beltrán Santoyo, Miguel Ángel, Castro Rivera, Rigoberto, García Lopez, Juan Carlos, Álvarez Fuentes, Gregorio   +3 more
core  

Hummingbird Feeders Can Provide eDNA for Detection of Nectar‐Feeding Bats

Environmental DNA, Volume 8, Issue 1, January–February 2026.
This study monitors nectar‐feeding bats (Leptonycteris nivalis, Leptonycteris yerbabuenae, and Choeronycteris mexicana) through eDNA swabs of hummingbird feeders collected by citizen scientists. Using novel qPCR assays, we successfully detected L. yerbabuenae and C. mexicana in a grand majority of samples. Previously only known to occur in the U.S.
Anna L. Riley, Daniel E. Sanchez, Kristen Lear, Rachel Burke, Brianna Mann, Faith M. Walker   +5 more
wiley   +1 more source

Therapeutic Use of Silver Nanoparticles in the Prevention and Arrest of Dental Caries

Bioinorganic Chemistry and Applications, 2020
Dental caries is one of the major diseases of the oral cavity affecting humans worldwide. Different alternatives have been used for its control, but its incidence and prevalence are still high. On the other hand, silver has been used for centuries due to
Claudia Butrón Téllez Girón, Juan F. Hernández Sierra, Idania DeAlba‐Montero, María de los A. Urbano Peña, Facundo Ruiz   +4 more
doaj   +1 more source

José Antonio Rivera Villanueva, Los otomíes de San Nicolás de Tierranueva Río de Jofre: 1680-1794, México, El Colegio de San Luis / Archivo Histórico del Estado del San Luis Potosí / H. Ayuntamiento de Tierranueva / Gobierno del Estado de San Luis Potosí, 2007, 166 p. [PDF]

, 2010
Reseña sobre José Antonio Rivera Villanueva, Los otomíes de San Nicolás de Tierranueva Río de Jofre: 1680-1794, México, El Colegio de San Luis / Archivo Histórico del Estado del San Luis Potosí / H.
Güereca Durán, Raquel E.
core   +1 more source

The Impact of Special Economic Zones on Border Regions in Mexico

Bulletin of Economic Research, Volume 78, Issue 1, Page 224-231, January 2026.
ABSTRACT We analyze the effects of a major tax reduction and a doubling of the minimum wage in the Northern region of Mexico, using a synthetic control approach. This quasi‐natural experiment allows us to isolate the impact of a 50% value‐added tax cut, a 30% income tax (Impuesto Sobre la Renta, ISR) reduction, and a significant wage increase on ...
D. Ventosa‐Santaulária, Raúl Cepeda‐Suárez, Alejandro Romero‐González   +2 more
wiley   +1 more source

Automatic generation of robot and manual assembly plans using octrees [PDF]

, 2010
This paper aims to investigate automatic assembly planning for robot and manual assembly. The octree decomposition technique is applied to approximate CAD models with an octree representation which are then used to generate robot and manual assembly ...
Corney, J., Lim, T., Medellin, H., Ritchie, J.M.   +3 more
core   +1 more source

Estructura y diversidad de especies arbóreas en bosques templados de San Luis Potosí, México

Ecosistemas y Recursos Agropecuarios, 2019
El estado de San Luis Potosí cuenta con ecosistemas boscosos que tienen limitada investigación en el ámbito forestal. Los estudios sobre la estructura y diversidad arbórea se realizan para generar información necesaria para efectuar un manejo conveniente
Marco Antonio Dávila-Lara, Ó. Aguirre-Calderón, E. Jurado-Ybarra, E. Treviño-Garza, M. A. González-Tagle, Guillermo Fernando Trincado-Villagrán   +5 more
semanticscholar   +1 more source