Výsledky vyhledávání - "Carlos E. M. Carvalho"

Cyanogenesis in sporophytes of pteridophytes evidenced by the picric acid test

Autor: Carlos E. M. Carvalho, Maria Luiza Ribeiro da Costa Ribeiro, Marcelo Guerra Santos, Camila Vaz Chagas de Freitas, Livia Viana de Godoy Fernandes, Alphonse Kelecom, Leonardo Moreira da Costa

Publikováno v: Acta Botanica Brasilica, Volume: 19, Issue: 4, Pages: 783-788, Published: DEC 2005
Acta Botanica Brasilica v.19 n.4 2005
Acta Botanica Brasilica
Sociedade Botânica do Brasil (SBB)
instacron:SBB

Os glicosídeos cianogênicos são substâncias de defesa encontradas em alguns vegetais, capazes de liberar ácido cianídrico por meio de reações de hidrólise. O presente estudo teve como objetivo avaliar a ocorrência da cianogênese em esporó

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b26abd49a6a88e3755c30a6fb0e1120
https://doi.org/10.1590/s0102-33062005000400014

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Fluorescent symmetric phenazines from naphthoquinones

Autor: Juan Omar Machuca Herrera, Nanci C. de Lucas, Maria do Carmo F. R. Pinto, Carlos E. M. Carvalho, Ira M. Brinn, Antonio V. Pinto

Publikováno v: Journal of Photochemistry and Photobiology A: Chemistry. 167:1-9

The time-resolved fluorescence spectroscopy of seven strongly fluorescent phenazine derivatives (two which can be associated approximately to the C2h point group, two to the C2v point group and three to the Cs point group) in organic solvents of vary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c30a4887a1edefdc26db0c4184384e67
https://doi.org/10.1016/j.jphotochem.2004.03.024

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ThreeN2-benzoyloxybenzamidines: sheet structures built from hard and soft hydrogen bonds and aromatic π–π stacking interactions

Autor: Carlos E. M. Carvalho, Janet M. S. Skakle, John N. Low, Solange M. S. V. Wardell, Christopher Glidewell, James L. Wardell

Publikováno v: Acta Crystallographica Section C Crystal Structure Communications. 60:o28-o32

Molecules of the title compounds N(2)-(benzoyloxy)benzamidine, C(14)H(12)N(2)O(2), (I), N(2)-(2-hydroxybenzoyloxy)benzamidine, C(14)H(12)N(2)O(3), (II), and N(2)-benzoyloxy-2-hydroxybenzamidine, C(14)H(12)N(2)O(3), (III), all have extended chain conf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86181d1d89df17f332ff6c51d33014f3
https://doi.org/10.1107/s0108270103025435

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Heterocyclic derivatives from natural occurring naphthoquinones: synthesis, characterization and X-ray structure of beta-lapachone hydrazo compounds

Autor: Antonio V. Pinto, Carlos E. M. Carvalho, Maria do Carmo F. R. Pinto, Willian Harrison, Vitor F. Ferreira

Publikováno v: Dyes and Pigments. 52:209-214

β-Lapachone-5-phenylhydrazone and β-lapachone-6-phenyl-hydrazone were synthesised and characterised using 1H and 13C NMR, IR, and UV–visible and X-ray analyses. 1H NMR and UV–visible spectroscopic data indicate that the hydrazo form dominates i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7baa587821e894427352a8c5e872e940
https://doi.org/10.1016/s0143-7208(01)00097-3

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ChemInform Abstract: Fluorescent Symmetric Phenazines from Naphthoquinones

Autor: Carlos E. M. Carvalho, K. C. G. De Moura, Ira M. Brinn, A. V. Pinto, Marcia R. Pinto, Flavio da Silva Emery, C. N. Pinto

Publikováno v: ChemInform. 29

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::090dfd0dc463a6eaa85cc047aba03386
https://doi.org/10.1002/chin.199813136

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Centrosymmetric π-stacked dimers in 5-(2-acetyloxyphenyl)-3-phenyl-1,2,4-oxadiazole

Autor: Solange M. S. V. Wardell, Christopher Glidewell, Carlos E. M. Carvalho, John N. Low

Publikováno v: Acta Crystallographica Section E Structure Reports Online. 59:o1729-o1730

In molecules of the title compound, C16H12N2O3, the three independent rings are nearly coplanar; the molecules are linked into centrosymmetric dimers by a π–π stacking interaction.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::281b2ffe3652a6bff16c14a593676f82
https://doi.org/10.1107/s1600536803022864

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3-Bromo-6-phenylhydrazono-β-lapachone

Autor: Antonio V. Pinto, William T. A. Harrison, Carlos E. M. Carvalho

Publikováno v: Acta Crystallographica Section E Structure Reports Online. 63:o4504-o4504

The title compound, C21H19BrN2O2, exists in the hydrazo tautomeric form in the crystal structure, being stablilized by an intramolecular N—H⋯O hydrogen bond. Aromatic π–π stacking helps to establish the packing [centroid-to-centroid separat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::302a3d3882e9807efedcd4c26f69ed53
https://doi.org/10.1107/s1600536807053810

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