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Search Results: 1 - 10 of 61104 matches for " Manuela Ramos Silva "
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Phenylhydrazinium (6-carboxypyridine-2-carboxylato)(pyridine-2,6-dicarboxylato)cobaltate(II)–pyridine-2,6-dicarboxylic acid–water (1/1/3)
Consuelo Yuste,Manuela Ramos Silva,Mohammad Ghadermazi,Fariba Feizi
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810048191
Abstract: The asymmetric unit of the title compound, (C6H9N2)[Co(C7H3NO4)(C7H4NO4)]·C7H5NO4·3H2O, contains one (6-carboxypyridine-2-carboxylato)(pyridine-2,6-dicarboxylato)cobaltate(II) anion, one phenylhydrazinium cation, one pyridine-2,6-dicarboxylic acid molecule and three uncoordinated water molecules, part of which are disordered. The CoII ion is coordinated by a pyridine-2,6-dicarboxylate ion and a 6-carboxypyridine-2-carboxylate ligand almost perpendicular to each other [the angle between the least-squares planes is 87.38 (4)°] and is surrounded by two O atoms and two N atoms in the equatorial plane and two O atoms in axial positions, resulting in a distorted octahedral coordination geometry. There is an extensive three-dimensional network of O—H...O and N—H...O hydrogen bonds, which link the components.
Bis(2,4,6-triamino-1,3,5-triazin-1-ium) bis(4-hydroxypyridine-2,6-carboxylato)cuprate(II) hexahydrate
Manuela Ramos Silva,Elham Motyeian,Hossein Aghabozorg,Mohammad Ghadermazi
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680802566x
Abstract: In the title compound, (C3H7N6)2[Cu(C7H3NO5)2]·6H2O, the coordination geometry of the CuII atom can be described as distorted octahedral. The equatorial plane is defined by four O atoms from two 4-hydroxypyridine-2,6-dicarboxylate ligands. The axial positions are occupied by the N atoms of the same ligands. There is an extensive three-dimensional hydrogen-bond network reinforcing crystal cohesion.
Estratégias de aprendizagem empregadas por estudantes do Ensino Fundamental
Lins, Manuela Ramos Caldas;Araujo, Monilly Ramos;Minervino, Carla Alexandra da Silva Moita;
Psicologia Escolar e Educacional , 2011, DOI: 10.1590/S1413-85572011000100007
Abstract: in this work, we analyze the repertoire of learning strategies used by schoolchildren of the city of campina grande, paraiba, brazil. the study included 491 students of both sexes enrolled in the 6 th to 9 th year of elementary school for private and public schools, with an average age of 12 years and 7 months (sd = 1.7). the results were obtained by applying a collective scale of learning strategies. they indicated that there is a difference regarding the use of strategies by repeating and non repeating students. the difference is visible too, when we study groups according to gender, age, year and type of school attended. these results suggest that students may be aware of effective use of learning strategies, since they use them regularly in their daily lives. our research may suggest that further studies are needed in order to deepen and broaden the perception of the results presented here.
Parceria nos cuidados de enfermagem em pediatria: do discurso à a??o dos enfermeiros
Mendes,Maria Goreti Silva Ramos; Martins,Maria Manuela Ferreira Pereira da Silva;
Revista de Enfermagem Referência , 2012,
Abstract: while it is recognized that paediatric nursing is now particularly sensitive to parental involvement in the care of hospitalized children, numerous studies continue to show that nurses do not establish real partnership with parents. as we wished to know how nurses in paediatrics view the forming process of partnership with parents in healthcare and identify the actions they develop in the setting, we employed a qualitative approach for this study, based on symbolic interactionism and grounded theory. we took as a starting point the question: how do paediatric nurses describe partnership and how they show it in their day-to-day work? we interviewed 12 nurses from the paediatric unit of a hospital in northern portugal and we carried out observations of the occurrence of the phenomenon in the setting. the data “corpus” was analysed using nvivo8 software. data obtained from the interviews revealed that working in partnership with parents was present in the “thinking” of nurses. however, the observations showed gaps in considering the fundamental dimensions of developing an effective partnership with parents. in summary, the nurses showed evidence of partnership in their thinking but not in their actions.
Monoclinic polymorph of 2-(pyrimidin-2-ylsulfanyl)acetic acid
Manuela Ramos Silva,Pedro S. Pereira Silva,Consuelo Yuste,José A. Paixão
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811000651
Abstract: The title compound, C6H6N2O2S, is a new polymorphic form of 2-(pyrimidin-2-ylsulfanyl)acetic acid. Unlike the previous orthorhombic polymorph [Pan & Chen (2009) Acta Cryst. E65, o652], the molecules are not planar: the aromatic ring makes an angle of 80.67 (17)° with the carboxyl plane. In the crystal, molecules are linked by O—H...N hydrogen bonds into chains along [overline{1}02].
N,N′-Bis[(E)-(6-methyl-2-pyridyl)methylene]hexane-1,6-diamine
Manuela Ramos Silva,Joana A. Silva,Ana Matos Beja,Abilio J. F.N. Sobral
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809016730
Abstract: The title compound, C20H26N4, is composed of two (6-methyl-2-pyridyl)methylene units linked by a 1,6-diamine hexane chain. The molecule has Ci symmetry with the inversion center situated at the mid-point of the central C—C bond. The alkyl chain has an all-trans conformation, with all the non-H atoms sharing the same plane [maximum deviation 0.004 (3) ]. The pyridylmethylene groups are also planar [maximum deviation 0.009 (3) ], making an angle of 53.78 (19)° with the hexane chain plane. In the crystal, the molecules assemble in layers, stacking along the a axis. The stacks are hold together by attractive interactions between π electron systems.
Poly[piperazine-1,4-diium [μ4-chlorido-μ3-chlorido-tri-μ2-chlorido-chloridodicadmate(II)] monohydrate]
Marwa Adib,Meher El Glaoui,Pedro Sidonio Pereira da Silva,Manuela Ramos Silva
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812001626
Abstract: In the title compound, {(C5H14N2)[Cd2Cl6]·H2O}n, the asymmetric unit contains one piperazinediium cation, one [Cd2Cl6]2 anion and a water molecule. The coordination geometries of the two Cd2+ cations are distorted octahedral. Adjacent CdII atoms are interconnected alternately by paired chloride bridges, generating polymeric chains parallel to [010]. Neighbouring chains are connected by O—H...Cl hydrogen bonds involving the water molecules, forming layers at z = n/2. The crystal packing is further stabilized by intermolecular N—H...Cl and N—H...O hydrogen bonds, one of which is bifurcated.
4-Amino-3,5-di-2-pyridyl-4H-1,2,4-triazole
Manuela Ramos Silva,Joana A. Silva,Nuno D. Martins,Ana Matos Beja
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808025658
Abstract: In the crystal structure of the title compound, C12H10N6, the molecules deviate slightly from planarity. The plane of the central triazole ring makes angles of 6.13 (9) and 3.28 (10)° with the pyridyl ring planes. Intramolecular N—H...N interactions form six-membered closed rings. The crystal packing also shows weak C—H...π and C—H...N interactions.
(Benzoato-κ2O,O′)(quinoline-2-carboxylato-κ2N,O)(quinoline-2-carboxylic acid-κ2N,O)manganese(II)
Nuno D. Martins,Joana A. Silva,Manuela Ramos Silva,Ana Matos Beja
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807066809
Abstract: The crystal structure of the title compound, [Mn(C7H5O2)(C10H6NO2)(C10H7NO2)], contains manganese(II) ions six-coordinated in a distorted octahedral environment. The equatorial plane is occupied by four O atoms, two from the carboxylate group of the benzoate ion, the other two from carboxylate/carboxyl groups of the quinaldate/quinaldic acid molecules. The axial positions are occupied by the N atoms of the quinoline ring systems. The metal ion lies on a twofold rotation axis that bisects the benzoate ligand; the quinaldate and quinaldic acid ligands are therefore equivalent by symmetry, and the carboxylate/carboxyl groups are disordered. The complexes are joined together by hydrogen bonds between the carboxylate/carboxyl groups of adjacent quinaldate/quinaldic acid molecules, forming zigzag chains that run along the c axis.
Bis[(2-quinolyl)methanediol-κ2N,O](sulfato-κO)copper(II) dihydrate
Nuno D. Martins,Joana A. Silva,Manuela Ramos Silva,Ana Matos Beja
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808001980
Abstract: In the title compound, [Cu(SO4)(C10H9NO2)2]·2H2O, the CuII ion is chelated by two (2-quinolyl)methanediol ligands and coordinated by a monodentate sulfate ligand in a distorted trigonal–bipyramidal environment, with O atoms occupying the equatorial sites and N atoms in the axial sites. The dihedral angle between the two essentially planar quinoline ring systems is 45.02 (9)°. In the crystal structure, an extensive O—H...O hydrogen-bonding network forms layers parallel to the ab plane.
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