Results 61 to 70 of about 80,398 (187)
Análisis de co-enlaces: una aproximación teórica [PDF]
, 2006 This work provides a theoretical and practical walk-through of Co-link Analysis, one of the classic techniques for information visualisation that serves as a tool for constructing Maps of Science in Webometrics.
Aguillo, Isidro F. +1 more
core +1 more source
Multicomponent Cyanation of 2‐Amino‐3‐cyano‐4H‐chromenes in Aqueous Media
Asian Journal of Organic Chemistry, Volume 13, Issue 12, December 2024.Chromenes, especially 2‐amino‐3‐cyano‐4H‐chromene derivatives, are present in biologically active compounds with potential properties, although the number of synthetic methods to date is limited. Here, we report a new protocol using a mild source of cyanide (acetone cyanohydrin), green solvents, and catalytic conditions via a multicomponent approach ...
Sandra Ardevines +5 more
wiley +1 more source
Contabilidad asimétrica de las reservas
, 2018 espanolEl articulo discute la forma como se contabilizan las reservas. La depreciacion que ha experimentado el peso colombiano tiene una doble consecuencia: por un lado, incrementa el valor en pesos de las reservas; por el otro, encarece el valor en ...
J. González
semanticscholar +1 more source
The Journal of Latin American and Caribbean Anthropology, Volume 29, Issue 4, Page 352-363, December 2024.Abstract This paper explores selective aspects of the historical processes of organization of the kichwa peasantry in the Andes of Ecuador. Based on the analysis of two representative cases of confrontation between peasants and landowners over access to land in the province of Chimborazo, it discusses the relevance of the concept of “gamonalismo” as ...
Víctor Bretón
wiley +1 more source
Secuelas neurocognitivas de leucomalacia periventricular
Revista Ciencias Biomédicas, 2020 Introducción: la leucomalacia periventricular (LPV) es una necrosis de la sustancia blanca que está ubicada dorsal y lateralmente a los ángulos externos de los ventrículos laterales.
Miriam Barboza Ubarnes +4 more
doaj +1 more source
New Twists in the Chemistry of Thioureas: 1,3‐Thiazolidines as a Vector of Sustainability
Chemistry – A European Journal, Volume 30, Issue 57, October 11, 2024.A new sustainable method for synthesizing 1,3‐N,S‐heterocycles, including 1,3‐thiazolidine‐2‐imines and 4,5‐dihydrothiazol‐2‐amines is reported. This innovative approach offers considerable shorter reaction times with higher yields, reduced energy consumption, and the elimination of hazardous chemicals.
Guillermo Canudo‐Barreras +2 more
wiley +1 more source
Catálisis Asimétrica, Una Nueva Era en la Síntesis de Fármacos: Historia y Evolución
, 2017 El entendimiento de la Quimica Organica a lo largo del tiempo, lleva a los cientificos a proponer estrategias sinteticas que permiten la obtencion de compuestos de interes biologico de manera enantio y diastereoselectiva.
James O. Guevara-Pulido +4 more
semanticscholar +1 more source
Policy &Internet, Volume 16, Issue 3, Page 628-642, September 2024.Abstract Infrastructure siting has been shown to lead to high contestation across political systems. To counteract this, policymaking has introduced participatory instruments that were recently supplemented by web‐based tools. Drawing on theoretical perspectives on policy conflict, this paper investigates how different conflict intensities reflected in
Ilana Schröder, Nils C. Bandelow
wiley +1 more source
Estudios Geologicos, 1997 El emplazamiento de granitoides en zonas de desgarre de la corteza superior se ha modelizado inyectando un fluido newtoniano en un paquete de arena en el cual se intercala una capa dúctil de silicona que actúa como un nivel de despegue potencial en el ...
T. Román Berdiel, D. Gapais, J. P. Brun
doaj +1 more source
Impacto de la información asimétrica en el mercado eléctrico colombiano no regulado de largo plazo [PDF]
, 2016 Este artículo estudia el impacto que la asimetría de información tiene sobre el mercado eléctrico no regulado colombiano desde una perspectiva teórica esta -- Se analizan los tratamientos que se han hecho en los principales mercados eléctricos ...
Arango Vargas, Susana +1 more
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