Results 51 to 60 of about 107,424 (195)

Protein‐Driven Copper Redox Regulation: Uncovering the Role of Disulphide Bonds and Allosteric Modulation

Angewandte Chemie International Edition, EarlyView.
Copper binding triggers structural changes that expose a reactive disulphide bridge, enabling intrinsic Cu(II) reduction in folded proteins. SAXS, XAS, and QM/MM simulations reveal how globular proteins such as HSA and SOD1 employ disulphide‐mediated dynamics to modulate site accessibility and control copper redox chemistry.
Rebecca Sternke‐Hoffmann, Chang Liu, Xue Wang, Hegne Pupart, Xun Sun, Jan Gui‐Hyon Dreiser, Peep Palumaa, Qinghua Liao, Matthias Krack, Jinghui Luo   +9 more
wiley   +1 more source

Trans-orgânica : uma proposta de ensino de química orgânica utilizando as temáticas de gênero e sexualidade [PDF]

, 2017
O artigo apresenta e analisa uma Proposta de Ensino de Química Orgânica desenvolvida abordando as temáticas de gênero e sexualidade. A proposta tem como eixo químico a compreensão da estrutura e da função dos hormônios, interconectado ao eixo social ...
Garcia, Ketlyn, Loguercio, Rochele, Lopes, Cesar   +2 more
core   +1 more source

Agricultura orgânica: características básicas do seu produtor. [PDF]

, 2006
A agricultura orgânica é ainda pouco expressiva no Brasil. Sua relevância é, no entanto, crescente, seguindo tendência observada em outros países, em especial na Europa.
ABRANTES Luiz Antônio, ALTIERI Miguel, ALTMANN Rubens, BEZERRA M.C.L, CHABOUSSOU Francis, CHAYANOV Alexander V, DAROLT M. R, DAROLT M. R, Eduardo Mello Mazzoleni, EHLERS Eduardo M, FREITAS João Carlos de, GRAZIANO NETO F, HESS Anselmo Antônio, Jorge Madeira Nogueira, LIMA Arlindo J.P, SMAILES Joanne, VEIGA José Eli da   +16 more
core   +3 more sources

Arene Incorporation and Ring Expansion in the Thermal Decomposition of a Divanadium(III) Complex With Four Bridging Methyl Groups

Chemistry – A European Journal, EarlyView.
Thermolysis of [{VCp*(µ‐CH3)2}2] (Cp* = η5‐C5Me5) in hexane leads to a tetranuclear cube‐type methylidene complex [{VCp*(µ3‐CH2)}4], while in benzenic solvents C6H5R produces the formal insertion of a CH fragment into the six‐membered aromatic ring of a solvent molecule to give trovacene derivatives with η7‐cycloheptatrienyl ligands [VCp*(η7‐C7H6R ...
Adrián Calvo‐Molina, Rodrigo González‐Prieto, Jesús Jover, Adrián Pérez‐Redondo, José Luis Priego, Carlos Yélamos   +5 more
wiley   +1 more source

POTENTIOMETRIC DETERMINATION OF CAPTOPRIL IN PHARMACEUTICAL FORMULATIONS

Eclética Química, 2018
A simple, precise, rapid and low-cost potentiometric method for captopril determination in pure form and in pharmaceutical preparations is proposed. Captopril present in tablets containing known quantity of drug was potentiometrically titrated in aqueous
P. R. da S. RIBEIRO, A. O. SANTINI, H. R. PEZZA, L. PEZZA   +3 more
doaj   +1 more source

Superação do vitalismo e o imparável desenvolvimento da síntese orgânica [PDF]

, 2011
A síntese orgânica representou um marco capital no História do Química, conduzindo ao fim da filosofia vitalista que considerava que as substâncias constitutivas dos animais e das plantas eram de natureza diferente dos corpos minerais, não obedecendo as ...
Paixão, Fátima, Pereira, Mariette
core  

Self‐assembly and Lateral Cobalt Coordination of a Fivefold Symmetric Cyanostar Macrocycle on an Au(111) Surface

Chemistry – A European Journal, EarlyView.
Herein, we report the first example of the formation of a close‐packed, regular 2D monolayer of a fivefold symmetric cyanostar macrocycle on an Au(111) surface under ultra‐high vacuum and the structural modification of such self‐assembled architecture upon cobalt atom deposition.
Lenka Černá, Miguel Martínez García, Shanmugasibi K. Mathialagan, Sofía O. Parreiras, Koen Lauwaet, José Ignacio Urgel, Aurelio Gallardo, Amar H. Flood, Tomás Torres, José M. Gallego, Giovanni Bottari, David Écija   +11 more
wiley   +1 more source

Relato de experiência Pibid: a contextualização do ensino de química na prevenção do uso de drogas lícitas e ilícitas [PDF]

, 2014
Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014O presente artigo é um relato de experiência didática do subprojeto de ...
Franceschini, Tiago, Severino, Heloisa Ferraro   +1 more
core  

Self‐Assembled Luminescent Au(I)–Adamantylamine Coordination Polymer Needles With Thermoresponsive Optical Properties

Chemistry – A European Journal, EarlyView.
A self‐assembled hydrophobic and red phosphorescent Au(I) coordination polymer (CP) was synthesized under mild conditions. Single‐crystal X‐ray diffraction (XRD) demonstrated linear Au(I) chains stabilized by aurophilic and hydrogen bonding interactions.
Miguel Justo‐Tirado, Jorge Escorihuela, Elena Zaballos‐García, Guillermo Mínguez Espallargas, Julia Pérez‐Prieto   +4 more
wiley   +1 more source

Tuning the Twist by Molecular Design: A New Strategy for Hexabenzocoronene‐Containing Helical Twistacene

Chemistry – A European Journal, EarlyView.
An efficient Scholl–based strategy enables precise control of the C–C bond to access the first hexabenzocoronene–containing helical twistacene (NG2). The resulting nanographene shows pronounced helical distortion, high stability, enhanced solubility, and promising redox and optoelectronic properties.
Juan P. Mora‐Fuentes, Daniel Villar‐Castro, J. Francisco Barbosa‐de‐Bessa, Daniel Aranda, Frank Hampel, Dolores Pérez, M. Eugenia Pérez‐Ojeda, Diego Peña, Andreas Hirsch   +8 more
wiley   +1 more source