Results 61 to 70 of about 5,711 (251)

Combustión de carbón

open access: yes, 2002
Resumen: La importancia del uso del carbón en el mundo puede verse en las figuras 1 y 2, en la que se muestran la producción y las reservas mundiales de carbón, lo mismo que el consumo del carbón en el mundo en comparación con otras fuentes de energía.
Londoño Giraldo, Carlos Arturo
core  

Minas de carbón "El Porvenir de la Industria" y Fábrica metalúrgica de Peñarroya: memoria de prácticas [PDF]

open access: yes, 1894
A unos 4 km aproximadamente de Peñarroya y Fuente Ovejuna, en la provincia de Córdoba, se encuentra un importante coto minero, constituido por la minas de carbón llamadas "Porvenir de la Industria", "San Juan"y "Esperanza" y las de hierro llamadas ...
García-Castañón y Arraiz, Vicente
core  

Characterisation of Drought and Wet Events in the Paraíba do Sul River Basin—Brazil

open access: yesInternational Journal of Climatology, EarlyView.
Trend analysis identified statistically significant reductions in precipitation (at the 5% significance level) at specific pluviometric stations in São Paulo and Rio de Janeiro, while other areas, mainly in Minas Gerais, experienced significant increases in annual and seasonal rainfall, particularly during summer and spring. These significant trends at
Gildo Rafael de Almeida Santana   +4 more
wiley   +1 more source

Alterations in brain metabolites in rats with experimental periodontitis: A metabolomic approach

open access: yesJournal of Periodontology, EarlyView.
Abstract Background Periodontitis (PD) is a chronic inflammatory disease with systemic effects. Emerging evidence suggests a link between periodontal inflammation and neurological changes, but the biochemical mechanisms in key brain regions, such as the hippocampus and amygdala, remain unclear.
Ramona Ramalho de Souza Pereira   +9 more
wiley   +1 more source

Estoque de carbono em sistemas agrossilvopastoril, pastagem e eucalipto sob cultivo convencional na região noroeste do Estado de Minas Gerais Carbon stock in agricultural-forestry-pasture, planted pasture, and eucalyptus systems under conventional tillage in the northwestern region of the Minas Gerais State

open access: yesCiência e Agrotecnologia, 2004
Conduziu-se este estudo com o objetivo de verificar as alterações nos teores e no estoque de carbono orgânico em sistemas agrossilvopastoril, pastagem cultivada e reflorestamento de eucalipto, no noroeste do Estado de Minas Gerais. O solo estudado foi um
Cláudia Milene Nascente das Neves   +4 more
doaj   +1 more source

Carbón: origen, composición y algunas características de sus yacimientos

open access: yes, 1992
En un intento por corresponder a la invitación de la Comisión para Ediciones de APUN, a publicar capítulos de material didáctico para los cursos de las carreras de la seccional de Medellín, se presentan estas notas que pueden servir de lectura base para ...
Sierra Baena, Miguel Ángel
core  

Remoción de carbón inquemado de las cenizas volantes producidas en el proceso de combustión de carbón [PDF]

open access: yes, 2007
El carbón inquemado presente en las cenizas volantes obtenida en los procesos de combustión de carbón, es el inconveniente principal para su utilización en la industria de la construcción. Este  material normalmente tiene un tamaño de partícula mayor que
FREDDY, JHON   +5 more
core  

Precision Restoration to Minimize Soil Loss in a Watershed in the Atlantic Forest Domain

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT The Turvo River Watershed, located in the Zona da Mata region of Minas Gerais and part of the Doce River Basin, faces serious problems of erosion and soil degradation, which compromise and reduce the quality of local water resources. Given this scenario, it is essential to implement environmental recovery strategies that prioritize the ...
Rodrigo Nobre Santana   +6 more
wiley   +1 more source

A DUF3455 domain‐containing protein promotes Ustilaginoidea virens infection and functions as a plant immune elicitor

open access: yesNew Plant Protection, EarlyView.
The fungal effector UvDUF1 from Ustilaginoidea virens not only promotes infection but also acts as a plant immunity elicitor, inducing broad‐spectrum disease resistance in rice and Nicotiana benthamiana. These results reveal its potential as a novel target for sustainable crop protection strategies.
Shuchen Wang   +13 more
wiley   +1 more source

Projeção do estoque de carbono e análise da geração de créditos em povoamentos de eucalipto Carbon stock projection and credit generation analysis in eucalypt stands

open access: yesRevista Árvore, 2008
Este estudo teve como objetivo predizer a produção volumétrica e o estoque de carbono nos fustes das árvores em povoamentos de eucalipto, bem como avaliar economicamente a inclusão dos Certificados de Emissões Reduzidas (CERs) nos projetos florestais ...
Rodrigo Firmino da Silva   +5 more
doaj   +1 more source

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