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Mostrando ítems 51-60 de 89
Avaliação dos efeitos da cumarina e da 4-hidroxi-cumarima e de diferentes associações com a sulfassalazina no modelo de colite induzida por ácido trinitrobenzenosulfônico (TNBS) em ratos
(Universidade Estadual Paulista (UNESP), 2014)
Coumarin-Based Fluorescent Probes for Dual Recognition of Copper(II) and Iron(III) Ions and Their Application in Bio-Imaging
(MDPI, 2014)
Two new coumarin-based “turn-off” fluorescent probes, (E)-3-((3,4-dihydroxybenzylidene)amino)-7-hydroxy-2H-chromen-2-one (BS1) and (E)-3-((2,4-dihydroxybenzylidene)amino)-7-hydroxy-2H-chromen-2-one (BS2), were synthesized ...
A New Curcuminoids-Coumarin Derivative: Mechanochemical Synthesis, Characterization and Evaluation of Its In Vitro Cytotoxicity and Antimicrobial Properties
(2021-11-08)
Over the years, several drugs have been developed deriving from plants to investigate possible therapeutic roles. Among them, curcuminoids and coumarins, which, display a wide range of biological activity against several ...
Physicochemical Properties and Proposed Mechanism in the Obtainment of 4-Hidroxycoumarin Conjugated Polymers Using MALDI-Tof Analysis
(International Organization of Scientific Research, 2016-02)
The mechanism for the poly-condensation event of conjugated polymers with ending 4-hydroxycoumarin has been proposed. It happened under H2SO4 acidic conditions only using enolic-coumarins without any substituent at third ...
Estudos espectroscópicos sobre a interação de rutinas, β-lapachonas e cumarinas com albumina sérica bovina (ASB)
(Instituto de QuímicaPrograma de Pós Graduação em QuímicaIQbrasil, 2016-05-10)
Medidas relativas aos espectros de Absorção da Albumina Sérica Bovina com
variação do comprimento de onda de varredura entre 300 a 500nm demonstraram um aumento
nas intensidades da banda de absorção da ASB, após adição de ...
Examining Mechanisms of Pyrethroid Resistance in Eggs of Two Populations of the Chagas' Disease Vector Triatoma infestans (Hemiptera: Reduviidae)
(Entomological Society of America, 2015-09)
Chagas disease is a zoonosis transmitted to man by blood-sucking triatomine bugs found in the Americas. Triatoma infestans (Klug, 1834) is the main vector of Chagas' disease in Argentina. The control of this illness relies ...
Simultaneous degradation of the anticancer drugs 5-fluorouracil and cyclophosphamide using a heterogeneous photo-Fenton process based on copper-containing magnetites (Fe3-xCuxO4)
(2020-02-01)
The effect of substitution of iron by copper in the magnetite lattice was investigated in terms of the catalytic activity in the heterogeneous photo-Fenton process. The physicochemical properties of the Fe3-xCuxO4 nanoparticles ...
Catalytic activity of Keggin heteropolycompounds in the Pechmann reaction
(Elsevier Science, 2008-04)
Different heteropolycompounds were used as catalysts in the synthesis of coumarins from phenols and ethyl acetoacetate. The H3PMo12O40 and H3PW12O40 Keggin heteropolyacids were supported on different types of silica. On ...
New voltammetric method useful for water insoluble or weakly soluble compounds: application to pKa determination of hydroxyl coumarin derivatives
(Springer, 2018)
Here, we reveal a different way of doing the voltammetric experiments that considers the electroactive species packaged in the electrodic phase instead of dissolved in solution. In this way, it is possible to obtain ...
Mechanism of the Reaction of Human Manganese Superoxide Dismutase with Peroxynitrite: Nitration of Critical Tyrosine 34
(American Chemical Society, 2016-06)
Human Mn-containing superoxide dismutase (hMnSOD) is amitochondrial enzyme that metabolizes superoxide radical (O2?−). O2?− reacts atdiffusional rates with nitric oxide to yield a potent nitrating species, peroxynitriteanion ...