Search Results - "Szpoganicz, B."

Studies on Synthetic and Natural Melanin and Its Affinity for Fe(III) Ion by Costa, T. G., Younger, R., Poe, C., Farmer, P. J., Szpoganicz, B.

“…In this work, we measured the metal-binding sites of natural and synthetic dihydroxyindole (DHI) melanins and their respective interactions with Fe(III) ions…”
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Nucleic acid cleavage by a Cu(II) polyaza macrocyclic complex by Oliveira, M.C.B., Couto, M.S.R., Severino, P.C., Foppa, T., Martins, G.T.S., Szpoganicz, B., Peralta, R.A., Neves, A., Terenzi, H.

“…In this paper, we describe the activity of the [Cu 2BMXD] complex as a nucleic acid cleavage agent. The rate constant for the DNA backbone cleavage reaction…”
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Potentiometric study of vitamin D 3 complexes with manganese(II), iron(II), iron(III) and zinc(II) in water—ethanol medium by Merc⩽, A.L.R., Szpoganicz, B., Khan, M.A., Do Thanh, X., Bouet, G.

“…Vitamin D 3 (LH) complexes with manganese(II), iron(II), iron(III) and zinc(II) were identified in water-ethanol medium (30/70). Their stability constants were…”
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Potentiometric study of vitamin D3 complexes with cobalt (II), nickel (II) and copper (II) in water–ethanol medium by Mercê, A.L.R, Szpoganicz, B, Dutra, R.C, Khan, M.A, Thanh, X.Do, Bouet, G

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Potentiometric study of vitamin D3 complexes with manganese (II), iron(II), iron(III) and zinc(II) in water-ethanol medium by Merce, A.L.R, Szpoganicz, B, Khan, M.A, Do Thanh, X, Bouet, G

“…Vitamin D3 (LH) complexes with manganese(II), iron(II), iron(III) and zinc(II) were identified in water-ethanol medium (30/70). Their stability constants were…”
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Equilibrium studies of galactomannan of Cassia fastuosa and Leucaena leucocephala and Cu2+ using potentiometry and EPR spectroscopy by Mercê, A.L.R., Lombardi, S.C., Mangrich, A.S., Reicher, F., Szpoganicz, B., Sierakowski, M.R.

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Catecholase Activity of a Series of Dicopper(II) Complexes with Variable Cu−OH(phenol) Moieties by Neves, Ademir, Rossi, Liane M, Bortoluzzi, Adailton J, Szpoganicz, Bruno, Wiezbicki, Clayton, Schwingel, Erineu, Haase, Wolfgang, Ostrovsky, Sergei

“…The catecholase activity of a series of dicopper(II) complexes containing different numbers of phenol groups coordinated to the metal centers was studied to…”
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A new flavonol from leaves of Eugenia jambolana by Timbola, A.K., Szpoganicz, B., Branco, A., Monache, F.D., Pizzolatti, M.G.

“…Leaves of Eugenia jambolana yielded the new flavonol, myricetin 3- O-(4″-acetyl)-α- l-rhamnopyranoside ( 1)…”
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Hypoglycemic effect and antioxidant potential of kaempferol-3,7-O-(alpha)-dirhamnoside from Bauhinia forficata leaves by Sousa, E. de, Zanatta, L, Seifriz, I, Creczynski-Pasa, T.B, Pizzolatti, M.G, Szpoganicz, B, Silva, F.R.M.B

“…In vivo and in vitro treatments were carried out to investigate the effects of kaempferol-3,7-O-(alpha)-dirhamnoside (kaempferitrin), a major flavonoid…”
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1-Chloro-2,4-dimorpholino-5-nitrobenzene by Zucco, C., Neves, A., Vencato, I., Szpoganicz, B., Bertoldi, F. C.

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Metal binding by melanins: studies of colloidal dihydroxyindole-melanin, and its complexation by Cu(II) and Zn(II) ions by Szpoganicz, Bruno, Gidanian, Shirley, Kong, Philip, Farmer, Patrick

“…Melanins are colloidal pigments known to have a high affinity for metal ions. In this work, the nature of the metal-binding sites are determined and the…”
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Equilibrium studies of selenite and selenate ions with the receptor complex formed by Cu2+ and 1,4,7,13,16,19-hexaaza-10,22-dioxacyclotetracosane (OBISDIEN) by da Silva, Marcos Rivail, Szpoganicz, Bruno, Lamotte, Michel, Donard, Olivier F.X., Fages, Frederic

“…The complexation of selenite (SeO32-) and selenate (SeO42-) ions in the cavity of the macrocyclic ligand OBISDIEN was studied in the absence and presence of…”
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Equilibrium studies of ternary complexes formed by bromide, sulfate, selenite and selenate ions with Zn2+, Mg2+ and 1, 4, 7, 13, 16, 19-hexaaza- 10, 22- dioxacyclotetracosane (obisdien) by Silva, Marcos Rivail da, Lamotte, Michel, Donard, Olivier F.X., Santos, Henrides dos, Nunes, Ricardo J., Szpoganicz, Bruno

“…Bromide, sulfate, selenite and selenate were found to form bridges in the cavity of mononuclear and binuclear Obisdien:Zn(II) and Obisdien:Mg(II) complexes in…”
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Synthesis, structure and properties of unsymmetrical μ-alkoxo-dicopper(II) complexes: biological relevance to phosphodiester and DNA cleavage and cytotoxic activity by Rossi, Liane M., Neves, Ademir, Bortoluzzi, Adailton J., Hörner, Rosmari, Szpoganicz, Bruno, Terenzi, Hernán, Mangrich, Antônio S., Pereira-Maia, Elene, Castellano, Eduardo E., Haase, Wolgang

“…Detailed kinetic studies, the deuterium isotope effect ( k H/ k D ∼ 1) and the X-ray structure of the monoesterphosphate ( 3) demonstrate that 1 hydrolyses…”
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Hydrolytic activity of a dinuclear copper(II,II) complex in phosphate diester and DNA cleavage by Rossi, Liane M., Neves, Ademir, Hörner, Rosmari, Terenzi, Hernán, Szpoganicz, Bruno, Sugai, Juliet

“…The hydrolysis of the phosphate diester bis(2,4-dinitrophenyl) phosphate promoted by the dinuclear copper (II,II) complex…”
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A new dinuclear unsymmetric copper(II) complex as model for the active site of catechol oxidase by Fernandes, Christiane, Neves, Ademir, Bortoluzzi, Adailton J, Mangrich, Antônio S, Rentschler, Eva, Szpoganicz, Bruno, Schwingel, Erineu

“…The crystal structure, magnetic, redox and spectroscopic properties of a novel unsymmetrical dinuclear copper(II) complex, prepared by the reaction between…”
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Acute effect of Bauhinia forficata on serum glucose levels in normal and alloxan-induced diabetic rats by Silva, Fátima Regina Mena Barreto, Szpoganicz, Bruno, Pizzolatti, Moacir Geraldo, Willrich, Maria Alice Vieira, de Sousa, Eliandra

“…Experimental diabetes was used to study the acute effect of the n-butanol fraction of Bauhinia forficata Link (Leguminosae) (BF) leaves on the serum glucose…”
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Hydrolytic DNA cleavage promoted by a dinuclear iron(III) complex by Neves, Ademir, Terenzi, Hernán, Horner, Rosmari, Horn Jr, Adolfo, Szpoganicz, Bruno, Sugai, Juliet

“…The dinuclear iron complex [Fe 2 III(BPClNOL) 2(H 2O) 2](ClO 4) 2 ( 1) [N–(2-hydroxybenzyl)–N–(pyridylmethyl)[(3-chloro)(2-hydroxy)]propylamine] was…”
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Aquatic Fulvic Acids: Chemical Characteristics and Complexation with Copper (II) by Vaz, D.O., Isoppo, N., Szpoganicz, B.

“…In this work we determined the quantity of fulvic acid functional groups and their interactions with copper(II) ions. The fulvic acids used were extracted from…”
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First-Transition-Metal Complexes Containing the Ligands 6-Amino-6-methylperhydro-1,4-diazepine (AAZ) and a New Functionalized Derivative:  Can AAZ Act as a Mimetic Ligand for 1,4,7-Triazacyclononane? by Peralta, Rosely A, Neves, Ademir, Bortoluzzi, Adailton J, Casellato, Annelise, dos Anjos, Ademir, Greatti, Alessandra, Xavier, Fernando R, Szpoganicz, Bruno

“…The structure and physicochemistry of the [NiII(AAZ)2](ClO4)2 (1) complex (AAZ = 6-amino-6-methylperhydro-1,4-diazepine), as a system that is able to mimic…”
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