Results 131 to 140 of about 255,683 (260)

Maternal nutrition as a key determinant of placental and developing blood–brain barrier xenobiotic protective functions

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Suboptimal maternal nutrition alters placental and developing blood–brain barrier (BBB) protective function and is associated with increased fetal brain vulnerability. In the placenta, nutritional adversity may reduce the exchange surface area and promote meta‐inflammation, compromising barrier efficiency in a model‐ and context ...
Kristin L. Connor   +4 more
wiley   +1 more source

LA MINERÍA DEL CARBÓN EN MAGALLANES ENTRE 1868 - 2003

open access: yesHistoria (Santiago), 2004
La presencia de carbón mineral lignita era conocida en el territorio de Magallanes desde el comienzo de la colonización chilena en la región del Estrecho de Magallanes.
MATEO MARTINIC B.
doaj  

El ferrocarril de Ribadeo al Bierzo [PDF]

open access: yes, 1928
Precede al título: Los grandes intereses nacionalesCopia digital. Valladolid : Junta de Castilla y León.
Rosón, Eduardo, Rosón, Eduardo
core   +1 more source

Subterranean environments contribute to three‐quarters of classified ecosystem services

open access: yesBiological Reviews, Volume 101, Issue 3, Page 1582-1605, June 2026.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola   +30 more
wiley   +1 more source

Diagnostico financiero en el sector minero – carbonífero: caso empresa Drummond LTD [PDF]

open access: yes, 2014
El trabajo de grado se realizó con el fin de conocer la situación financiera y la evolución que han tenido las empresas del sector minero-carbonífero del país, tomando como objeto de estudio la segunda productora de carbón más grande de Colombia ...
Maya Villegas, Luz Dary   +2 more
core  

Topic Modeling of Fatty Acid Studies: Evaluating Environmental Changes in Freshwater Ecosystems

open access: yesInternational Review of Hydrobiology, Volume 111, Issue 1, June 2026.
ABSTRACT Fatty acids (FAs) are biochemical molecules with vital structural and metabolic functions in all living organisms. Over the last decades, FA analysis in ecological studies has garnered significant attention due to its diverse applicability, such as taxonomic support for species identification, investigations on trophic interactions, and ...
A. C. Campos, B. Gücker, I. G. Boëchat
wiley   +1 more source

Índice de reactividad intrínseco de carbones concentrados ricos en vitrinita

open access: yesIngeniería e Investigación, 2007
En este trabajo se definió un nuevo parámetro de reactividad de carbón a la combustión llamado índice de reactividad intrínseco (IRI), el cual combina la fracción maceral reactiva (vitrinita/liptinita), la fracción maceral no reactiva (inertinita/materia
Andrés Felipe Rojas González   +2 more
doaj  

La adecuación turística de las cuencas mineras del carbón de León y Palencia: la preservación de la memoria y el uso alternativo de las instalaciones [PDF]

open access: yes, 2011
XII Coloquio de Geografía del Turismo, Ocio y Recreación de la Asociación de Geógrafos Españoles.
Hortelano Mínguez, Luis Alfonso
core   +2 more sources

Weed Management Influences the Accumulation of Organic Matter in the Soil and Productivity in Coffee Farming

open access: yesNew Zealand Journal of Crop and Horticultural Science, Volume 54, Issue 2, June 2026.
The management of weeds can influence organic matter (OM) and organic carbon (OC) levels, impacting the productivity and sustainability of coffee plantations. This study aimed to evaluate OM and OC levels in coffee soils under different weed management practices and their influence on coffee tree physiology and productivity. The experiment featured six
Indira Pereira de Oliveira   +9 more
wiley   +1 more source

Home - About - Disclaimer - Privacy