Results 11 to 20 of about 18,307 (218)

Una aproximación a la comercialización de la producción de los concentrados mineros

Pensamiento Crítico, 2009
El presente artículo desarrolla un particular análisis sobre la implicancia de la comercialización de la producción de concentrados mineros para el periodo de 1989 hasta el 2007.
Ysaac Ospino edery
doaj   +2 more sources

Suplementación de forrajes de alta calidad con diferentes tipos de concentrados : efectos sobre la fermentación ruminal [PDF]

, 2012
Se realizaron 3 experimentos con el fin de estudiar los efectos de la suplementación de forrajes de alta calidad con diferentes tipos de concentrados energéticos. En el experimento I se evaluó el efecto de la inclusión de niveles crecientes desde 0 a 100%
Britos Arcaus, Alejandro
core   +5 more sources

Dynamic returns to scale and geography in U.S. banking

Papers in Regional Science, Volume 102, Issue 1, Page 53-85, February 2023., 2023
Abstract We observe spatial cost dependence among medium‐sized and large U.S. banks (1998Q1–2020Q4). We contribute to the literature by accounting for this using an accessible dynamic spatial econometric cost model. For a movement along a bank's output expansion path, we calculate the cost returns that spillover to/from the bank. The noticeable impacts
Anthony J. Glass, Karligash Kenjegalieva
wiley   +1 more source

Plant chemical diversity and its frequency have distinct but complementary effects on insect foraging

Journal of Applied Ecology, Volume 59, Issue 5, Page 1362-1371, May 2022., 2022
Whereas previous work investigates how the amount of chemical diversity in a plant population influences insect ecology, our results indicate that local spatial distribution of diversity is equally important. A key implication of this work is the potential to design cultivar mixtures spatially, at the movement scale of target organisms, to create more ...
Kayleigh C. Hauri, Andrea E. Glassmire, Brendan Randall, Luke N. Zehr, William C. Wetzel   +4 more
wiley   +1 more source

Inter‐country differences in the cultural ecosystem services provided by cockles

People and Nature, Volume 4, Issue 1, Page 71-87, February 2022., 2022
Abstract Coastal systems provide many cultural ecosystem services (CES) to humans. Fewer studies have focused solely on CES, while those comparing CES across countries are even rarer. In the case of shellfish, considerable ecosystem services focus has been placed on nutrient remediation, with relatively little on the cultural services provided, despite
Mathilde Jackson‐Bué, Ana C. Brito, Sara Cabral, David N. Carss, Frederico Carvalho, Paula Chainho, Aurélie Ciutat, Elena Couñago Sanchez, Xavier de Montaudouin, Rosa M. Fernández Otero, Mónica Incera Filgueira, Alice Fitch, Angus Garbutt, M. Anouk Goedknegt, Sharon A. Lynch, Kate E. Mahony, Olivier Maire, Shelagh K. Malham, Francis Orvain, Mélanie Rocroy, Andrew van der Schatte Olivier, Laurence Jones   +21 more
wiley   +1 more source

Urban sprawl into Natura 2000 network over Europe

Conservation Biology, Volume 35, Issue 4, Page 1063-1072, August 2021., 2021
Abstract Urban growth is a major threat to biodiversity conservation at the global scale. Its impacts are expected to be especially detrimental when it sprawls into the landscape and reaches sites of high conservation value due to the species and ecosystems they host, such as protected areas. I analyzed the degree of urbanization (i.e., urban cover and
Elena D. Concepción
wiley   +1 more source

Trends in seabird breeding populations across the Great Barrier Reef

Conservation Biology, Volume 35, Issue 3, Page 846-858, June 2021., 2021
Abstract The Great Barrier Reef is an iconic ecosystem, known globally for its rich marine biodiversity that includes many thousands of tropical breeding seabirds. Despite indications of localized declines in some seabird species from as early as the mid‐1990s, trends in seabird populations across the reef have never been quantified.
Bradley K. Woodworth, Richard A. Fuller, Graham Hemson, Andrew McDougall, Bradley C. Congdon, Matthew Low   +5 more
wiley   +1 more source

Cinética de tostación de concentrados de baja ley de molibdenita [PDF]

, 2013
El molibdeno es un metal atractivo para la fabricación de aceros y fundiciones debido a que promueve un marcado endurecimiento, aumentando la resistencia mecánica cuando la aleación se somete a enfriamientos controlados en un rango de temperaturas ...
Bazán, Vanesa, Colque, Enzo, Elena Brandaleze, Vanesa Bazán, Bazán Brizuela, Vanesa Lucia, Brandaleze, Elena, Enzo Colque   +6 more
core   +2 more sources

Validação das equações do NRC (2001) para predição do valor energético de alimentos nas condições brasileiras Validation of NRC (2001) equations for estimation of energy value of feeds in Brazilian conditions

Revista Brasileira de Zootecnia, 2005
O estudo foi conduzido para estimar os valores energéticos (NDT) de vários alimentos, concentrados e volumosos e validar as equações propostas pelo NRC (2001) por meio da comparação dos valores estimados por estas equações, com os observados, obtidos a ...
Marcos Antonio Lana Costa, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Mário Fonseca Paulino, Paulo Roberto Cecon, Pedro Veiga Rodrigues Paulino, Mário Luiz Chizzotti, Mônica Lopes Paixão   +7 more
doaj   +1 more source

¿Reduce la cirugía sin circulación extracorpórea el sangrado postoperatorio y los concentrados de hematíes transfundidos en grupos de alto riesgo?

Cirugía Cardiovascular, 2012
Introducción y objetivos. La influencia de la cirugía de revascularización miocárdica (CRM) sin circulación extracorpórea (CEC) en el sangrado postoperatorio es desconocida.
Daniel Hernández-Vaquero, Juan C. Llosa, Rocío Díaz, Carlos Morales, José L. Naya, Francisco Gosálbez, Luis Barneo   +6 more
doaj   +1 more source