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Publicações - ciências exatas e da terra

Converting Mn/Al layered double hydroxide anion exchangers into cation exchangers by topotactic reactions using alkali metal sulfate solutions Anne Raquel Sotiles; WYPYCH, FERNANDO CHEMICAL COMMUNICATIONS, v. 55, p. 7824-7827, 2019 DOI Home page Palavra-chave: layered double hydroxide; Exchange reactions Áreas do conhecimento: Ciências Exatas e da Terra; Engenharia e Ciencia de Materiais; Materiais de Baixa Dimensionalidade Estrutural resumo ... Layered double hydroxides (LDHs), traditional anion exchangers, can be converted into cation exchangers by topotactic reactions using aqueous solutions of alkali metal sulfates. LDHs with the composition [Mn2Al(OH)6](An−)1/n·yH2O (An− = Cl− or NO3−, CO32−) were reacted with aqueous solutions of Na2SO4. The a
Correction: The value of universally available raw NMR data for transparency, reproducibility, and integrity in natural product research MCALPINE, JAMES B.; BOUFRIDI, ASMAA; BUTLER, MARK S.; CAPON, ROBERT J.; CHOI, YOUNG H.; COPPAGE, DAVID; CREWS, PHILLIP; CRIMMINS, MICHAEL T.; CSETE, MARIE; DEWAPRIYA, PRADEEP; EGAN, JOSEPH M.; CHEN, SHAO-NONG; GARSON, MARY J.; GENTA-JOUVE, GRÉGORY; GERWICK, WILLIAM H.; GROSS, HARALD; HARPER, MARY KAY; HERMANTO, PRECILIA; HOOK, JAMES M.; HUNTER, LUKE; JEANNERAT, DAMIEN; JI, NAI-YUN; KUTATELADZE, ANDREI; JOHNSON, TYLER A.; KINGSTON, DAVID G. I.; KOSHINO, HIROYUKI; LEE, HSIAU-WEI; LEWIN, GUY; LI, JIE; LININGTON, ROGER G.; LIU, MIAOMIAO; MCPHAIL, KERRY L.; MOLINSKI, TADEUSZ F.; MACMILLAN, JOHN B.; MOORE, BRADLEY S.; NAM, JOO-WON; NEUPANE, RAM P.; NIEMITZ, MATTHIAS; NUZILLARD, JEAN-MARC; OBERLIES, NICHOLAS H.; OCAMPOS, FERNANDA M. M.; PAN, GUOHUI; QUINN, RONALD J.; REDDY, D. SAI; APPENDINO, GIOVANNI; RENAULT, JEAN-HUGUES; RIVERA-CHÁVEZ, JOSÉ; ROBIEN, WOLFGANG; SAUNDERS, CARLA M.; SCHMIDT, THOMAS J.; SEGER, CHRISTOPH; SHEN, BEN; STEINBECK, CHRISTOPH; STUPPNER, HERMANN; STURM, SONJA; Barison, Andersson; TAGLIALATELA-SCAFATI, ORAZIO; TANTILLO, DEAN J.; VERPOORTE, ROBERT; WANG, BIN-GUI; WILLIAMS, CRAIG M.; WILLIAMS, PHILIP G.; WIST, JULIEN; YUE, JIAN-MIN; ZHANG, CHEN; XU, ZHENGREN; BENIDDIR, MEHDI A.; SIMMLER, CHARLOTTE; LANKIN, DAVID C.; BISSON, JONATHAN; PAULI, GUIDO F.; BIAVATTI, MAIQUE W.; BLUML, STEFAN NATURAL PRODUCT REPORTS, v. 36, n. 1, p. 248-249, 2019 DOI Palavra-chave: RMN Áreas do conhecimento: Ciências Exatas e da Terra; Química; Ressonancia Magnetica Nuclear; Engenharias; Engenharia Química; Tecnologia Química; Produtos Naturais; Ciências Exatas e da Terra; Química; Química Orgânica; Estrutura, Conformação e Estereoquímica resumo ... Correction for ‘The value of universally available raw NMR data for transparency, reproducibility, and integrity in natural product research’ by James B. McAlpine et al., Nat. Prod. Rep., 2018, DOI: 10.1039/c7np00064b.
Correlated Brownian motion and diffusion of defects in spatially extended chaotic systems DA SILVA, S. T.; Thiago de Lima Prado; LOPES, S. R.; VIANA, R. L. CHAOS, v. 29, n. 7, p. 071104 2019 DOI Palavra-chave: Dinamica Espaco-Temporal Áreas do conhecimento: Ciências Exatas e da Terra; Física; Física Geral; Dinamica Nao-Linear e Caos resumo ... One of the spatiotemporal patterns exhibited by coupled map lattices with nearest-neighbor coupling is the appearance of chaotic defects, which are spatially localized regions of chaotic dynamics w...
Correlated Brownian motion and diffusion of defects in spatially extended chaotic systems DA SILVA, S. T.; PRADO, T. L.; LOPES, S. R.; VIANA, R. L. CHAOS, v. 29, n. 7, p. 071104 2019 DOI Palavra-chave: Recurrence Entropy; turbulence Áreas do conhecimento: Ciências Exatas e da Terra; Física dos Fluídos, Física de Plasmas e Descargas Elétricas; Física de Plasmas e Descargas Elétricas; Ciências Exatas e da Terra; Física; Dinamica Nao-Linear resumo ... One of the spatiotemporal patterns exhibited by coupled map lattices with nearest-neighbor coupling is the appearance of chaotic defects, which are spatially localized regions of chaotic dynamics w...
Crystal structures of binuclear complexes of gadolinium(III) and dysprosium(III) with oxalate bridges and chelating N , N --bis(2-oxidobenzyl)- N , N --bis(pyridin-2-ylmethyl)ethylenediamine (bbpen 2− ) Guilherme Augusto Barbosa; SANTANA, FRANCIELLI SOUSA; Giovanna G Nunes; Jaisa Fernandes Soares ACTA CRYSTALLOGRAPHICA SECTION E, CRYSTALLOGRAPHIC COMMUNICATIONS, v. 75, n. 4, p. 418-422, 2019 DOI Home page Palavra-chave: lanthanide(III); crystal structure; molecular magnetism; chelate; Binuclear; oxalate Áreas do conhecimento: Ciências Exatas e da Terra; Química Inorgânica; Química de Coordenação; Ciências Exatas e da Terra; Física; Física da Matéria Condensada; Estrutura de Líquidos e Sólidos; Cristalografia resumo ... The reaction between mononuclear [Ln(bbpen)Cl] [Ln = Gd or Dy; H2bbpen = N,N′-bis(2-hydroxybenzyl)-N,N′-bis(pyridin-2-ylmethyl)ethylenediamine, C28H30N4O2] and potassium oxalate monohydrate in water/methanol produced the solvated centrosymmetric isostructural binuclear (μ-oxalato)bis{[N,N′-bis(2-oxidobenzyl-κO)-N,N′-bis(pyridin-2-ylmethyl-κN)ethylenediamine-κ2N,N′]dilanthanide(III)}–methanol–water (1/4/4) complexes, [Ln2(C28H28N4O2)2(C2O4)]·4CH3OH·4H2O, with lanthanide(III) = gadolinium(III) (Ln = Gd) and dysprosium(III) (Ln = Dy), in high yields (ca 70%) directly from the reaction mixtures. In both complexes, the lanthanide ion is eight-coordinate and adopts a distorted square-antiprismatic coordination environment. The triclinic (P\overline{1}) unit cell contains one dimeric unit together with four water and four methanol molecules; in the final structural model, two of each type of solvating molecule refine well. In each lanthanide(III) dimeric molecule, the medium-strength O⋯H—O hydrogen-bonding pattern involves four oxygen atoms, two of them from the phenolate groups that are `bridged' by one water and one methanol molecule. These interactions seem to contribute to the stabilization of the relatively compact shape of the dimer. Electron densities associated with an additional water and methanol molecule were removed with the SQUEEZE procedure in PLATON [Spek (2015). Acta Cryst. C71, 9–18]. These two new compounds are of interest with respect to magnetic properties.
Crystal structures of binuclear complexes of gadolinium(III) and dysprosium(III) with oxalate bridges and chelating N , N --bis(2-oxidobenzyl)- N , N --bis(pyridin-2-ylmethyl)ethylenediamine (bbpen 2− ) Guilherme Augusto Barbosa; SANTANA, FRANCIELLI SOUSA; Giovanna G Nunes; Jaísa Fernandes Soares ACTA CRYSTALLOGRAPHICA SECTION E, CRYSTALLOGRAPHIC COMMUNICATIONS, v. 75, n. 4, p. 418-422, 2019 DOI Home page Palavra-chave: lanthanide(III); crystal structure; molecular magnetism; chelate; Binuclear; oxalate resumo ... The reaction between mononuclear [Ln(bbpen)Cl] [Ln = Gd or Dy; H2bbpen = N,N′-bis(2-hydroxybenzyl)-N,N′-bis(pyridin-2-ylmethyl)ethylenediamine, C28H30N4O2] and potassium oxalate monohydrate in water/methanol produced the solvated centrosymmetric isostructural binuclear (μ-oxalato)bis{[N,N′-bis(2-oxidobenzyl-κO)-N,N′-bis(pyridin-2-ylmethyl-κN)ethylenediamine-κ2N,N′]dilanthanide(III)}–methanol–water (1/4/4) complexes, [Ln2(C28H28N4O2)2(C2O4)]·4CH3OH·4H2O, with lanthanide(III) = gadolinium(III) (Ln = Gd) and dysprosium(III) (Ln = Dy), in high yields (ca 70%) directly from the reaction mixtures. In both complexes, the lanthanide ion is eight-coordinate and adopts a distorted square-antiprismatic coordination environment. The triclinic (P\overline{1}) unit cell contains one dimeric unit together with four water and four methanol molecules; in the final structural model, two of each type of solvating molecule refine well. In each lanthanide(III) dimeric molecule, the medium-strength O⋯H—O hydrogen-bonding pattern involves four oxygen atoms, two of them from the phenolate groups that are `bridged' by one water and one methanol molecule. These interactions seem to contribute to the stabilization of the relatively compact shape of the dimer. Electron densities associated with an additional water and methanol molecule were removed with the SQUEEZE procedure in PLATON [Spek (2015). Acta Cryst. C71, 9–18]. These two new compounds are of interest with respect to magnetic properties.
Cultural coyote optimization algorithm applied to a heavy duty gas turbine operation Juliano Pierezan; Gabriel Maidl; Eduardo Massashi Yamao; LEANDRO DOS SANTOS COELHO; Viviana Cocco Mariani Energy Conversion and Management, v. 199, n. 1, p. 1-14, 2019 DOI Home page Palavra-chave: otimização; turbinas à gás; coyotes algorithm Áreas do conhecimento: Engenharias; Pesquisa Operacional; Programação Linear, Não-Linear, Mista e Dinâmica; Engenharias; Engenharia Mecânica; Métodos de Otimização; Ciências Exatas e da Terra; Física; Áreas Clássicas de Fenomenologia e suas Aplicações; Transferência de Calor; Processos Térmicos e Termodinâmicos resumo ... In the past decades, the quantity of researches regarding industrial gas turbines (GT) has increased exponentially in terms of number of publications …
Cytotoxicity of xyloglucan from Copaifera langsdorffii and its complex with oxovanadium (IV/V) on B16F10 cells FARIAS, CAROLINA LANE ALVES; MARTINEZ, GLAUCIA REGINA; CADENA, SILVIA MARIA SUTER CORREIA; Ana Lucia Ramalho Merce; DE OLIVEIRA PETKOWICZ, CARMEN LÚCIA; NOLETO, GUILHERMINA RODRIGUES INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, v. 121, p. 1019-1028, 2019 DOI Palavra-chave: Potentiometric Titrations; polysaccharides; metal ions Áreas do conhecimento: Ciências Biológicas; Química de Macromoléculas; Glicídeos; Ciências Exatas e da Terra; Química; Química Inorgânica; Química Bio-Inorgânica; Ciências Exatas e da Terra; Química; Química Inorgânica; Campos de Coordenação resumo ...
Database Processing-in-Memory: An Experimental Study Tiago Rodrigo Kepe; ANTONIO ZANATA ALVES, MARCO; Eduardo Cunha de Almeida Proceedings of the VLDB Endowment, v. 13, n. 13, p. 334-347, 2019 DOI Home page Palavra-chave: PIM Processor-in-memory; OLAP Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Banco de Dados resumo ... Maintaining data consistency is known to be hard. Recent approaches have relied on integrity constraints to deal with the problem - correct and complete constraints naturally work towards data cons...
Decay of the distance autocorrelation and Lyapunov exponents Carlos Fabio Oliveira Mendes; DA SILVA, R. M.; Marcus W. Beims PHYSICAL REVIEW E, v. 99, n. 6, p. 062206 2019 DOI Palavra-chave: Bifurcacoes; correlacoes; dinâmica não-linear; distance correlation; expoente Lyapunov resumo ... This work presents numerical evidence that for discrete dynamical systems with one positive Lyapunov exponent the decay of the distance autocorrelation is always related to the Lyapunov exponent. Distinct decay laws for the distance autocorrelation are observed for different systems, namely, exponential decays for the quadratic map, logarithmic for the H\'enon map, and power-law for the conservative standard map. In all these cases the decay exponent is close to the positive Lyapunov exponent. For hyperchaotic conservative systems the power-law decay of the distance autocorrelation is not directly related to any Lyapunov exponent.

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