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Search Results: 1 - 10 of 626562 matches for " Valéria R. de S.; "
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Different coordination modes for disulfoxides towards diorganotin(IV) dichlorides. X-ray crystal structures of 1,2-cis-bis-(phenylsulfinyl)ethene (rac-,cis-cbpse) and adducts [{Ph2SnCl2(meso-bpse)}n] and [{n-Bu2SnCl2(pdtd)}2]
Sousa, Gerimário F. de;Ellena, Javier;Malta, Valéria R. S.;Ardisson, José D.;
Journal of the Brazilian Chemical Society , 2009, DOI: 10.1590/S0103-50532009000800008
Abstract: the reactions of meso-1,2-bis(phenylsulfinyl)ethane (meso-bpse) with ph2sncl2, 2-phenyl-1,3-dithiane trans-1-trans-3-dioxide (pdtd) with n-bu2sncl2 and 1,2-cis-bis-(phenylsulfinyl)ethene (rac-,cis-cbpse) with ph2sncl2, in 1:1 molar ratio, yielded [{ph2sncl2(meso-bpse)}n], [{n-bu2sncl2(pdtd)}2] and [{ph2sncl2(rac,cis-cbpse)}x] (x = 2 or n), respectively. all adducts were studied by ir, m?ssbauer and 119sn nmr spectroscopic methods, elemental analysis and single crystal x-ray diffractometry. the x-ray crystal structure of [{ph2sncl2(meso-bpse)}n] revealed the occurrence of infinite chains in which the tin(iv) atoms appear in a distorted octahedral geometry with cl atoms in cis and ph groups in trans positions. the x-ray crystal structure of [{n-bu2sncl2(pdtd)}2] revealed discrete centrosymmetric dimeric species in which the tin(iv) atoms possess a distorted octahedral geometry with bridging disulfoxides in cis and n-butyl moieties in trans positions. the spectroscopic data indicated that the adduct containing the rac,cis-cbpse ligand can be dimeric or polymeric. the x-ray structural analysis of the free rac-,cis-cbpse sulfoxide revealed that the crystals belong to the c2/c space group.
Evaluating the orientations of nursing in perioperatory care - a descriptive study
Norma Valéria D. de O. Souza,Maristela F. Silva,Graciete S. Marques,Fernanda R. Rodrigues
Online Brazilian Journal of Nursing , 2006,
Abstract: Introduction: The orientation makes possible the client adaptation to his health condition, minimizing his anxiety , and can be offered in orientation groups for health. The extension project “ Orientating the client in surgical situation to diferenciate the care” helps to understand the internation process and was implemented in order to minimize the orientation deficit about client perioperatory. Objective: To evaluate the project from clients perception. Methodology: Quantitative case study developed in may/june/2005 with preoperatory clients of general surgery. Main Results: The participants referred that it was important to receive preoperatory information, learned them and suggested the group ampliation for all the surgical clients of the hospital in question. Conclusions: The project has been suitably developed, and clients consider it relevant to cover all their health needs; suggestions that were given reveal the necessity to amplify offer/participation at meetings for the other surgical clients of this hospital.
Enzymatic inhibition studies of selected flavonoids and chemosystematic significance of polymethoxylated flavonoids and quinoline alkaloids in Neoraputia (Rutaceae)
Moraes Valéria R. de S.,Tomazela Daniela M.,Ferracin Ricardo J.,Garcia Cleverson F.
Journal of the Brazilian Chemical Society , 2003,
Abstract: Our taxonomic interest in the Neoraputia stimulated an investigation of N. paraensis searching for alkaloids. Fractions were monitored by 1H NMR and ESI-MS/MS and only those which showed features of anthranilate alkaloids and flavonoids absent in the previous investigations were examined. Stems afforded the alkaloids flindersine, skimmianine, 8-methoxyflindersine and dictamnine; leaves yielded 3',4',7,8-tetramethoxy-5,6-(2",2"-dimethylpyrano)-flavone, 3',4',5,7,8-pentamethoxyflavone, 5-hydroxy-3',4',6,7-tetramethoxyflavone, 3',4'-methylenedioxy-5,6,7-trimethoxyflavone and 5-hydroxy-3',4'-methylenedioxy-6,7-dimethoxyflavone. The alkaloids have remained undiscovered for 10 years. A number of flavonoids isolated from N. paraensis, N. magnifica, Murraya paniculata, Citrus sinensis graft (Rutaceae), Lonchocarpus montanus (Leguminosae) were evaluated for their ability to inhibit the enzymatic activity of the protein glyceraldehyde-3-phosphate dehydrogenase from Trypanosoma cruzi. Highly oxygenated flavones and isoflavone were the most actives.
Light intensity on growth, leaf micromorphology and essential oil production of Ocimum gratissimum
Valéria Ferreira Fernandes,Laís B. de Almeida,Emily V. R. da S. Feijó,Delmira da C. Silva
Revista Brasileira de Farmacognosia , 2013,
Abstract: Light conditions can promote the growth and development of plants and contribute to increase the essential oil production of commercially cultivated medicinal and aromatic species. In view of the great importance of Ocimum gratissimum L., Lamiaceae, as an aromatic plant, the objective of this work was to determine the effect of light intensities (approximately 4, 7, 11 and 20 mol m-2 d-1) on growth, foliar micromorphology, essential oil content, yield and chemical composition of O. gratissimum. Biomass production of different organs, root:shoot ratio and leaf mass per area were found to linearly increase with increased light availability, whereas stem dry matter fraction, number of leaves, leaf area and plant height have increased up to 10 mol m-2 d-1 and decreased from this value. The tector trichomes density increased with increased light availability, but there was no effect of light treatments on the glandular trichomes density and essential oil content. Regardless of the light level, the major component of the essential oil was eugenol. The essential oil yield per plant increased linearly with light intensity as a direct effect of increased leaf biomass under similar conditions.
New spectral data of some flavonoids from Deguelia hatschbachii A.M.G. Azevedo
Magalh?es, Aderbal F.;Tozzi, Ana M. G. A.;Magalh?es, Eva G.;Moraes, Valéria R. de S.;
Journal of the Brazilian Chemical Society , 2003, DOI: 10.1590/S0103-50532003000100022
Abstract: from the roots of deguelia hatschbachii, the known flavonoids scandenin (1), methyl robustate (2) and 4',5- dihydroxy-6-(3,3-dimethylalyll)-7-methoxy flavanone (3) were isolated and characterized by comparison of their spectroscopic data with those found in the literature. now the inclusion of 1d- and 2d-nmr and ms/ms data has allowed the complete assignment of all hydrogen and carbon chemical shifts in their nmr spectra, as well as the elucidation of the fragmentation pathways of 1-3 in the mass spectrometer.
Desidrata??o osmótica de pêssegos em fun??o da temperatura e concentra??o do xarope de sacarose
Germer, Sílvia P. M;Queiroz, Marlene R. de;Aguirre, José M;Berbari, Shirley A. G;Anjos, Valéria D;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2011, DOI: 10.1590/S1415-43662011000200008
Abstract: the production of dried peach by osmotic dehydration is an alternative for using the excess of peach production. the influence of the temperature and concentration of the sucrose syrup in osmotic dehydration of peaches was evaluated. variations in physical and chemical properties, and osmotic dehydration parameters (weight loss and water loss; solids incorporation) were investigated. an experimental central composite design was employed ranging the temperature (30 to 50 oc) and concentration (45 to 65 °brix), keeping the syrup:fruit mass ratio 4:1, process time 4 h, and format pieces (halves). the degree of acceptance was used in the sensory analysis, evaluating the following characteristics: appearance, taste, texture, colour and overall quality. the results were modelled using the statistica program (v. 6.0) employing the response surface methodology. the following mathematical models resulted significant (p < 0.05) and predictive: dimensionless soluble solids content and colour parameter l*, water loss and weight loss parameters. the temperature was the prevalent effect. the process conditions from 50 to 54.1 °c and from 55 to 65 °brix presented more water loss and better sensory performances.
New spectral data of some flavonoids from Deguelia hatschbachii A.M.G. Azevedo
Magalh?es Aderbal F.,Tozzi Ana M. G. A.,Magalh?es Eva G.,Moraes Valéria R. de S.
Journal of the Brazilian Chemical Society , 2003,
Abstract: From the roots of Deguelia hatschbachii, the known flavonoids scandenin (1), methyl robustate (2) and 4',5- dihydroxy-6-(3,3-dimethylalyll)-7-methoxy flavanone (3) were isolated and characterized by comparison of their spectroscopic data with those found in the literature. Now the inclusion of 1D- and 2D-NMR and MS/MS data has allowed the complete assignment of all hydrogen and carbon chemical shifts in their NMR spectra, as well as the elucidation of the fragmentation pathways of 1-3 in the mass spectrometer.
Comportamento suíno influenciado por dois modelos de maternidade
Sabino, Luana A.;Sousa Júnior, Vilmar R. de;Abreu, Paulo G. de;Abreu, Valéria M. N.;Lopes, Letícia dos S.;Coldebella, Arlei;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2011, DOI: 10.1590/S1415-43662011001200015
Abstract: in this study two models of motherhood were evaluated. a model (mod 1) consisted of two similar rooms, each room was made up of eight individual breed cells. the creep was of brick with wooden lid and floor heating by electrical resistance. the rooms of second model (mod 2), consisted of 20 individual cells breeder, where only 16 were evaluated. the creep of wood was heated by 60 w incandescent lamp. the environmental conditions of the rooms and the interior of creep were assessed. the behavior of the piglets was assessed in the hall environment and creep. generally, the more favorable environment for the piglets was in mod 1 with the higher values of temperature and humidity within the comfort zone. the floor temperature of creep of mod 2 was the one which provided the best results. the most observed behavior in the piglets was to stay inside the creep area and cluster of lying. the theme of this study needs further research, taking into account variables that may affect the temperature inside the creep area such as the material used in construction of shelter and heat exchange among the piglets.
Efeito do óleo de mamona em composi??es de borracha natural contendo sílica
Costa, Helson M. da;Ramos, Valéria D.;Abrantes, Thomas A. S.;Castro, Daniele F. de;Visconte, Leila L. Y.;Nunes, Regina C. R.;Furtado, Cristina R. G.;
Polímeros , 2004, DOI: 10.1590/S0104-14282004000100013
Abstract: the possible use of castor oil fatty acid as an activator for the vulcanization reaction in silica-filled natural rubber (nr) compounds was investigated. the design and analysis of the experiments were carried out by keeping constant the concentration of silica and the other ingredients while the amounts of stearic acid, castor oil and poly(ethylene glycol) were varied. cure was carried out on a ti-100 oscillating disk rheometer, and the tensile strength was chosen as the control variable. the results show that the addition of castor oil does not significantly change the mechanical performance of silica-filled natural rubber compounds.
As formigas como indicadores biológicos do impacto humano em manguezais da costa sudeste da Bahia
Delabie, Jacques H.C.;Paim, Valéria R.L. de M.;Nascimento, Ivan C. do;Campiolo, Sofia;Mariano, Cléa dos S.F.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000500006
Abstract: mangroves are common in estuaries along the atlantic coast of brazil. although plant diversity is low, this ecosystem supports a range of animals, offering some resources for non-aquatic organisms. many insects live in mangroves and, between them, many ant species that are exclusively arboreous. mangroves throughout the world suffer from high levels of human impact, and this is particularly true for southeastern bahia, where land-uses include traditional crab and fish exploitation, urban development, refuse pollution, recreation, and timber extraction. the ants of 13 mangrove sites, representing a range of levels of human use, have been studied along 250 km of the southern bahia littoral, between itacaré and porto seguro. ants were sampled both inside and on the periphery of the tidal zone, using entomological rainbow, baiting, collect of hollow branches and pit-fall. a total of 108 species have been collected, with the richest genera being camponotus and pseudomyrmex, and the most frequent belonging to the genera azteca and crematogaster. the ant community living on the periphery of mangrove areas is rather homogeneous regardless of the degree of environmental perturbation, but varies markedly with the disturbance inside the mangroves themselves. the evolution of richness of the both communities, mangrove and periphery, is negatively related to the human effects, even limited to the periphery. ant communities therefore have the potential to be useful as biological indicators of ecological impacts of land-use in these mangrove systems.
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