Results 181 to 190 of about 5,236,261 (354)
, 2019 La correspondiente a 2019 es la tercera edición de los monográficos de Nueva Revista dedicados a la universidad. En esta ocasión, hemos pretendido fijar la mirada en la figura del profesor.
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Advanced Synthesis &Catalysis, EarlyView.This study reveals that ligand stereoelectronic effects, rather than vinylogous electrophilicity, govern selectivity in Ag‐, Rh‐, and Cu‐catalyzed vinylcarbene C(sp3)H insertions. These insights guide the design of more selective catalysts for CH functionalization.
Roger Monreal‐Corona +6 more
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Gold‐Catalyzed Synthesis of Fluorenones via Intramolecular C–H Arylation
Advanced Synthesis &Catalysis, EarlyView.Starting from 2‐diazobenzophenones, a straightforward synthesis of valuable fluorenones via a gold‐catalyzed one‐pot oxidation, C–H activation, and cyclization is described. The addition of ascorbic acid, the correct selection of the counteranion of the 2‐diazobenzophenones, and the use of terpyridine as an auxiliary ligand are crucial for the reaction
Osvaldo Felipe López‐Saladino +5 more
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A Universidade Católica e o futuro da Universidade
, 2008 Humanística e Teologia, v. 29 n.
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Advanced Sustainable Systems, EarlyView.This study evaluates the environmental trade‐offs of different rice husk management strategies using a life cycle assessment (LCA) approach. It compares biochar production for water treatment and soil improvement with direct incineration for energy generation.
José Lugo‐Arias +7 more
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Recibimientos a San Martín y a Bolívar en la Universidad de San Marcos, de Daniel Varcárcel
, 1951 Alejandro Hernández R.
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Microwave‐Assisted One‐Pot Synthesis of Alkyl Levulinates From Post‐Harvest Vegetable Waste
Advanced Sustainable Systems, EarlyView.Vegetable waste is valorized through Soxhlet extraction using H₂O₂ and heteropolyacid (HPA), followed by material characterization (XRD, FTIR, TGA, DSC). A microwave‐assisted reaction at 170 °C for 30 min with HPA and alcohol yields bio‐based esters.
Ángel G. Sathicq +5 more
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Advanced Sustainable Systems, EarlyView.The electronic modulation of Nb‐doped Co3O4 catalyst showcases enhanced activity and extended stability for OER in both alkaline (1M KOH) and acidic (0.5M H2SO4) electrolytes. The higher activity emanated from the synergistic effect between the Nb5+ dopant and Co3O4.
Kassa Belay Ibrahim +7 more
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La Fecundidad Rural en Latinoamerica: Una Encuesta Experimental Para Medir Actitudes, Conocimiento Y ComportamientoCentro Latinoamericano De Demografia, Unlversidad De Chile (Celade) Clinica Obstetrica, Universidad De Chile Community And Family Study Center, University Of Chicago [PDF]
, 1965 openalex +1 more source