Results 21 to 30 of about 76,812 (158)
Synthesis and supramolecular self-assembly of glutamic acid-based squaramides
Beilstein Journal of Organic Chemistry, 2018 We describe the preparation and characterization of two new unsymmetrical squaramide-based organogelators. The synthesis of the compounds was carried out by subsequent amine condensations starting from dimethyl squarate.
Juan V. Alegre-Requena +6 more
doaj +1 more source
¿Por qué predominan los gobiernos de mala calidad?
Panorama Económico, 2005 Este documento analiza la abstención electoral de los votantes como un problema de información asimétrica en el mercado político. A través del esquema de análisis planteado por George Akerlof (1970), se sugiere que la existencia de programas de gobierno ...
Jorge Luis Navarro
doaj +1 more source
Intramolecular Hydrogen Bond in Biologically Active o-Carbonyl Hydroquinones
Molecules, 2014 Intramolecular hydrogen bonds (IHBs) play a central role in the molecular structure, chemical reactivity and interactions of biologically active molecules.
Maximiliano Martínez-Cifuentes +3 more
doaj +1 more source
Coumarin compounds against Alzheimer's disease: An in-silico approach
Results in ChemistryAlzheimer's disease, one of the most common causes of senile dementia, has no cure which makes the development of new treatments crucial. In this regard, secondary metabolites from plants have shown important bioactivity, including the inhibitory effect ...
Mayra Avelar +3 more
doaj +1 more source
Educación Química, 2018 La quiralidad es un fenómeno estrechamente ligado a la naturaleza y a la vida. Nuestro metabolismo depende del reconocimiento selectivo que se lleva a cabo entre enzimas, receptores y diversos sitios activos que poseen una quiralidad determinada.
Zara J. Domínguez Esquivel
doaj +1 more source
Síntesis asimétrica de Lennoxamina [PDF]
, 2012 46 p.La obtención de mezclas racémicas en la síntesis de diversos fármacos en décadas anteriores era muy común, sin embargo en la actualidad se busca la síntesis de un solo enantiómero, ya que las regulaciones actuales exigen la evaluación de ambos ...
Piérola Maldonado, Johanna +1 more
core
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT This paper examines the rise and collapse of the 2021 United Arab Emirates (UAE)–Israel–Jordan Water‐for‐Energy Deal, a landmark initiative that sought to exchange Jordanian solar energy for Israeli desalinated water. Presented as a breakthrough in regional cooperation and environmental peacebuilding, the agreement was brokered under the ...
Majed Abu‐Zreig, Hussam Hussein
wiley +1 more source
New Approaches to Oxirane Containing Natural Products: Stereoselective Total Synthesis of the Antitumor Agents Gummiferol and Depudecin [PDF]
, 2015 La comunicación presenta la síntesis total de productos naturales con actividad antitumoral caracterizados estructuralmente por la presencia de anillos de oxirano.
García-Ruiz, Cristina +1 more
core
World Affairs, Volume 189, Issue 1, Spring 2026.ABSTRACT This study conducts a comprehensive and critical examination of the interplay between development assistance and strategic geopolitical objectives in the European Union's (EU) engagement with African crises. Although the EU positions itself as a normative power committed to advancing peace, development, and human rights, its practices often ...
Edmond Chick +1 more
wiley +1 more source
La financiacion del transporte urbano y metropolitano desde los presupuestos generales del Estado [PDF]
, 2006 Desde 1990 la Administración General del Estado ha venido financiando el transporte urbano y metropolitano a través de diversos Contratos-Programas y Convenios de Financiación de Infraestructuras Ferroviarias.
de Rus, Gines, Socorro, M. Pilar
core