Results 81 to 90 of about 107,424 (195)
Educación Química, 2018 Escribimos esta carta con el fin de señalar algunas imprecisiones y de hacer algunos agregados al artículo sobre mecanismos de reacción en la Química Orgánica aparecido en el Vol. 23, Núm. 2, pp. 205-207, 2012 de Educación Química.
Rosa María Aguilar-Garduño +2 more
doaj +1 more source
ChemPhysChem, Volume 27, Issue 6, 27 March 2026.The host–guest complexation of a new fluorescent probe called 7‐(diethylamino)‐4‐hydroxyquinoline‐2(1H)‐one (QD) and its inclusion complex with the Cucurbit[7]uril (CB7) macrocycle were studied within a joint experimental and computational study. Confinement alters the photophysical properties of the synthesized quinolinone derivative also offering a ...
Kevin Droguett +4 more
wiley +1 more source
Educación QuímicaThis work presents a didactic sequence (DS) for teaching key laboratory techniques—continuous and discontinuous extraction, vacuum and atmospheric distillation, steam extraction, and thin-layer chromatography (TLC)—to first-year organic chemistry ...
Brenda de Moraes Cordeiro +1 more
doaj +1 more source
European Journal of Organic Chemistry, Volume 29, Issue 12, 23 March 2026.The conformational effect of the gem‐dimethyl motif and its isostere cyclopropane unit in the gold‐catalyzed cycloisomerization of aliphatic 1‐bromoalkynes has been studied. An unexpected inhibitory effect of the cyclopropane ring has been observed.
Rubén Miguélez +5 more
wiley +1 more source
HPW-Catalyzed environmentally benign approach to imidazo[1,2-a]pyridines
Beilstein Journal of Organic ChemistryThe imidazo[1,2-a]pyridine moiety is present in drugs with several biological activities. The most direct way of obtaining this nucleus is the Groebke–Blackburn–Bienaymé three-component reaction (GBB-3CR) between aminopyridines, aldehydes, and ...
Luan A. Martinho +1 more
doaj +1 more source
Antithrombotics from the Sea: Polysaccharides and Beyond
Marine Drugs, 2019 Marine organisms exhibit some advantages as a renewable source of potential drugs, far beyond chemotherapics. Particularly, the number of marine natural products with antithrombotic activity has increased in the last few years, and reports show a wide ...
Francisca Carvalhal +5 more
doaj +1 more source
Efeito da substituição do farelo de trigo por torta de amêndoa de dendê no consumo voluntário e digestibilidade de misturas suplementares para ruminantes. [PDF]
, 2011 bitstream/item/32777/1/CPATU-BP190 ...
AZEVEDO, G. P. C. de +3 more
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Modelação do consumo de cloro na oxidação de matéria orgânica presente em águas superficiais com diferentes origens (Portugal e Angola) [PDF]
, 2014 A qualidade da água para consumo humano é uma condição indispensável na sociedade atual. Entre os requisitos de qualidade de uma água de referir a isenção de contaminação bacteriológica, o que requer um processo de desinfeção, normalmente por cloragem,
Boaventura, Rui, Martins, Ramiro
core +1 more source
Advanced Synthesis &Catalysis, Volume 368, Issue 6, 17 March 2026.Selective late‐stage modification of N‐terminal phenylalanine short peptides is achived by visible‐light initiated reaction with N‐iodoimides in a debenzylation–amination process. This metal‐free method permits the incorporation of N‐containing heterocycles into the α‐position of the peptide backbone.
Guillermo Morales‐Ortega +4 more
wiley +1 more source
Synthetic Chiral Derivatives of Xanthones: Biological Activities and Enantioselectivity Studies
Molecules, 2019 Many naturally occurring xanthones are chiral and present a wide range of biological and pharmacological activities. Some of them have been exhaustively studied and subsequently, obtained by synthesis.
Carla Fernandes +5 more
doaj +1 more source