Results 31 to 40 of about 605,160 (179)

Structural insights of asphaltenes through mild oxidation reactions and MID infrared spectroscopy

CT&F Ciencia, Tecnología & Futuro
Mild oxidation reactions were induced over four different asphaltenes. Oxidation products were characterized via infrared spectroscopy to propose structural descriptors, taking advantage of the high sensitivity for detecting carbon oxygen vibrations in ...
Fernando Andres Rojas Ruiz, Diego Rolando Merchan Arenas, Santiago Villabona Estupiñan, Juan Sebastian Ramírez Pradilla, Jorge Armando Orrego Ruiz   +4 more
doaj   +1 more source

Procedimiento integral para contribuir a la transición de fincas agropecuarias a agroenergéticas sostenibles en Cuba

Pastos y Forrajes
En Cuba se realizan grandes esfuerzos para lograr un desarrollo sostenible que garantice la seguridad alimentaria y la autosuficiencia energética, compatibles con la protección del medioambiente. A este propósito contribuye el proyecto internacional BIOMAS-CUBA, que tiene entre sus principales objetivos la promoción e implementación de fincas ...
D Blanco, J Suárez, F.R Funes-Monzote, S Boillat, G.J MartÃn, Leydi Fonte   +5 more
openaire   +2 more sources

¿TRANSICIÓN DEL ACHELENSE EN ISRAEL? LOS CASOS DE UBEIDIYA Y QESEM

Revista Atlántica-Mediterránea de Prehistoria y Arqueología Social, 2016
En este trabajo se analiza bibliograficamente los conjuntos tecnologicos dentro de una posible transicion del Achelense en dos yacimientos de Israel, Ubeidiya y Qesem. Entre ambos yacimientos existen un desfase de 1 Ma, pero la pervivencia del Modo 2 existe.
openaire   +1 more source

Transition to turbulence in the bottom boundary layer under a solitary wave. [PDF]

, 2016
Se estudia la transición a la turbulencia en una capa límite oscilatoria.Se estudia la transición a la turbulencia en una capa límite oscilatoria.Universidad de Málaga.
Diamessis, Peter, Parras-Anguita, Luis, Sadek, Mahmoud   +2 more
core   +1 more source

Paraguay: Teatro y transición democrática [PDF]

, 1997
Paraguay: Teatro y transición ...
Bogado, Víctor
core   +2 more sources

The Distributive Consequences of Active Welfare Policies in Europe

European Policy Analysis, EarlyView.
ABSTRACT This article examines the distributive consequences of active welfare policies in Europe by analysing tier‐specific investments in individualised employment services across four European welfare states: Denmark, Germany, the Netherlands and the United Kingdom.
Deborah Jackwerth‐Rice, Katharina Zimmermann   +1 more
wiley   +1 more source

National human footprint maps for Peru and Ecuador

Scientific Data
Human Footprint (HF) maps score human pressures based on their influence and integrate them into a single spatial index to assess the naturalness of ecosystems.
Jose Aragon-Osejo, Lenin Beltrán, Juan Iglesias, Hólger Zambrano, Daniel Borja, Carlos Oñate, Francisco Simbaña, Freddy Valencia, Karen Rodríguez De la Vera, Luis Poveda, Fernando Proaño, Lorena Parra, María Chacón, William Llactayo, Tatiana Pequeño Saco, Walter Huamani, German Marchand, Raúl Tinoco, Luis Quispe, Alexs Arana, Anne Lucy Stilger Virnig, Patricia Huerta, Karla Jiménez, Pedro Tipula Tipula, Susana Rodríguez, Rodrigo Sierra, Andrew J. Hansen, Oscar Venter   +27 more
doaj   +1 more source

A stochastic multi-objective enhanced energy management system in smart microgrid based on an improved grey wolf optimizer and reduced unscented transformation

Frontiers in Energy Research
The aim of this article is to examine how energy management systems (EMSs) in smart microgrids (MGs) can be achieved with the increased use of renewable energy, energy storage systems (ESSs), and time-of-use tariffs, which introduce variability and ...
Mohammad Heydari, Taher Niknam, Moslem Dehghani, Alvaro Hoffer Garces, Mokhtar Aly, Jose Rodriguez   +5 more
doaj   +1 more source

Fosfoles en la química de coordinación [PDF]

Avances en Química, 2012
Phospholes exhibit great versatility as ligands in coordination chemistry. Their structure and properties has allowed obtaining a variety of interesting complexes, some of them with unusual structures and coordination numbers, such that can offer ...
Yomaira Otero, Alejandro Arce
doaj  

Transitional effects of a pension system change in Spain [PDF]

, 1997
This paper studies the output effects, transition costs and the change in pension benefits derived from the substitution of the current unfunded pension system by a fully funded pension system financed through mandatory savings.
Bailén, José M., Gil, Joan, 1966-
core