Results 21 to 30 of about 10,911 (211)

INSURGENCY AND AMERICAN FOREIGN POLICY: The Case of George McGovern

World Affairs, Volume 180, Issue 2, Page 32-61, June 2017., 2017
As a distinct foreign‐policy group, neoconservatives emerged in a period of social unrest and political cynicism—a time when insurgent presidential candidates can have profound effects on the outlook and conduct of foreign policy. The George McGovern insurgency is an important historical event that was accompanied by social unrest, distrust in ...
Roberta N. Haar
wiley   +1 more source

Síntesis y caracterización de los sistemas ácidos WO3/ZrO2 y WO3/TiO2 aplicados en la hidratación de etileno a etanol

Revista Ion, 2018
Este trabajo se enfoca en la síntesis y la caracterización de dos sistemas ácidos obtenidos por el método de impregnación húmeda incipiente, partiendo de una sal de tungsteno y empleando a los óxidos metálicos ZrO2 y TiO2 como soportes. Los dos sistemas
Juan Carlos Salazar, Mario A. Llano, Julián D. Urresta   +2 more
doaj   +1 more source

Synthesis of High cis‐Polybutadiene in Styrene Solution with Neodymium‐Based Catalysts: Towards the Preparation of HIPS and ABS via In Situ Bulk Polymerization

International Journal of Polymer Science, Volume 2016, Issue 1, 2016., 2016
In a first step, 1,3‐butadiene was selectively polymerized at 60°C in styrene as solvent using NdV3/DIBAH/EASC as the catalyst system. The catalyst system activation process, the addition order of monomers and catalyst components, and the molar ratios [Al]/[Nd] and [Cl]/[Nd] were studied.
Ramón Díaz de León, Florentino Soriano Corral, Francisco Javier Enríquez-Medrano, Gabriela Bosques Ibarra, Patricia de León Martínez, Francisco Hernández Gámez, Héctor Ricardo López-González, Luis Francisco Ramos de Valle, Atsushi Sudo   +8 more
wiley   +1 more source

Características de estudiantes con talento en la escritura académica de las licenciaturas en educación y en enseñanza del inglés

Aula
Esta investigación presenta un acercamiento a las características del talento en la escritura académica de estudiantes universitarios de las licenciaturas en Educación y en Enseñanza del Inglés, situado en los catalizadores ambientales e intrapersonales ...
Diana Irasema Cervantes Arreola, Dalia Lizette Gómez Martínez, Óscar Martín Vázquez Reyes   +2 more
doaj   +1 more source

Mecanismos de desactivación de catalizadores heterogéneos

Mundo Nano. Revista Interdisciplinaria en Nanociencias y Nanotecnología, 2020
La desactivación catalítica es un problema serio en las diferentes secciones del proceso de refinación del petróleo, que causa la pérdida de actividad catalítica con respecto al tiempo de operación. La presente revisión está enfocada en los mecanismos de desactivación de catalizadores, tales como envenenamiento, ensuciamiento, degradación térmica y ...
José Gabriel Téllez Romero, P. Sarabia-Bañuelos, S. Hernández-González, V. A. Nolasco-Arizmendi   +3 more
openaire   +3 more sources

Twelve principles for successful governance of community‐based coastal marine restoration

Conservation Biology, EarlyView.
Abstract Global agreements, such as the Global Biodiversity Framework, call for urgent, large‐scale action to halt biodiversity loss through a whole‐of‐society approach. Community‐based restoration can play a crucial role in achieving this goal, yet there remains limited understanding of what makes these projects effective and sustainable.
Michelle M. Holian, Sean D. Connell, Dominic McAfee   +2 more
wiley   +1 more source

KnowCat: Catalizador de Conocimiento

, 2001
KnowCat is a distributed non-supervised system for structuring knowledge. KnowCat stands for "Knowledge Catalyser" and its purpose is enabling the crystallisation of collective knowledge as the result of user interactions. One of the applications of the system is the generation of quality educational materials as the automatic result of student ...
Cobos Pérez, Ruth, Alamán Roldán, Xavier, Esquivel, José A.   +2 more
openaire   +2 more sources

Facets of Crises: How Problem Indicators and Public Perceptions Affect Policy Change

Policy Studies Journal, EarlyView.
ABSTRACT Crises are widely acknowledged as catalysts for policy change. Yet, our understanding of the policy effects of crises remains limited. Why do only some crises lead to major changes, while significant policy changes also occur during seemingly non‐crisis periods?
Constantin Kaplaner, Alexa Lenz, Vanessa Millich, Christoph Knill, Yves Steinebach, Clara Fochler, Annika Kolbe   +6 more
wiley   +1 more source

Catalizadores basados en Co3O4 para el control de emisiones de metano en motores de gas natural: de catalizadores másicos a catalizadores estructurados en espumas de celda abierta [PDF]

, 2021
369 p.La comercialización de vehículos impulsados con gas natural es una estrategia interesante parareducir las emisiones en el sector transporte. Sin embargo, su consolidación en el mercadoexige el control de las emisiones residuales de metano no ...
Choya Atencia, Andoni
core   +2 more sources

The frequency and importance of polyploidy in tropical rainforest tree radiations

New Phytologist, Volume 249, Issue 4, Page 2103-2114, February 2026.
Summary The presence of more than two copies of the genome in an organism, termed ‘polyploidy’, is a crucial force in plant evolution, generating genetic, phenotypic and ecological diversity. [Correction added on 22 January 2026, after first online publication: the preceding sentence has been corrected.] The Amazonian tree flora is the most species ...
Rowan J. Schley, Rosalía Piñeiro, James A. Nicholls, Michelle L. Gaynor, Gwilym P. Lewis, Flávia Fonseca Pezzini, Kyle G. Dexter, Catherine Kidner, R. Toby Pennington, Alex D. Twyford   +9 more
wiley   +1 more source