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Search Results: 1 - 10 of 17349 matches for " Daniela Lopes "
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Influência do uso do poliol reciclado obtido pela glicólise na prepara??o da espuma rígida de poliuretano
Lopes, Elio;Becker, Daniela;
Polímeros , 2012, DOI: 10.1590/S0104-14282012005000014
Abstract: one of the major problems is the appropriate final destination of the materials or waste that can not be reused in the original process. among the residues are rigid polyurethane foams, which are widely applied but difficult to reuse because they are thermosetting materials. the aim of this paper is to apply a chemical recycling process, glycolysis, and use the recycled polyol, product of glycolysis reaction, as part of the raw material for the formation of rigid polyurethane foams. their mechanical properties and thermal conductivity were analyzed. the formation of foam cells with recycled polyol were evaluated by scanning electron microscopy (mev). the results show that there is no loss of mechanical and thermal properties of pur foam, satisfying the requirements for the production of domestic refrigerators.
Indicadores naturais de pH: usar papel ou solu??o?
Terci, Daniela Brotto Lopes;Rossi, Adriana Vitorino;
Química Nova , 2002, DOI: 10.1590/S0100-40422002000400026
Abstract: in this work, the fruit extracts of morus nigra - mulberry, syzygium cuminii - jambol?o, vitis vinifera ? grape, myrciaria cauliflora - jabuticaba are suggested as ph indicators in the form of either solutions or paper. the ph indicator solutions were prepared by soaking the fruits or their peels in ethanol 1:3 (m/v) for 24 h, followed by simple filtration. the ph indicator papers were prepared by imersion of the qualitative filter paper strips in the ph indicator solutions. the different ph leads to color changes in the indicator solutions or papers and it can be used for teaching elementary chemistry concepts.
Aplica es clínicas da barra transpalatina removível
Daniela Frantz Nobre,Gustavo Vallandro Lopes
Stomatos , 2006,
Abstract: The present article has for objective to discourse the use of the removable transpalatal arch in orthodontic treatment. The activation of the transpalatal arch generates a series of forces and binary clinically useful to move the maxillary molars in the three space plans. This device of easy making presents important such functions as: to aid in the anchorage, expansion and contraction of the arches, correction of the rotations of molars, control of the torque and inclinations of molars, control of the extrusion of molars, correction of the unilateral upper crossbite and auxiliary in the movement of distalization of maxillary molars. The knowledge of the possibilities of use the transpalatal arch constitutes an important auxiliary resource in the orthodontic therapy.
Viscum album citotoxicity in Caco-2 cells (in vitro) analyzed by Dispersive Raman Spectroscopy Citotoxicidad de Viscum album en c lulas Caco-2 (in vitro) analizada mediante Espectroscop -a Raman Dispersiva Citotoxicidade de Viscum album em c lulas Caco-2 (in vitro) analisada atrav s de Espectroscopia Raman Dispersiva
Daniela Franco Lopes,Landulfo Silveira Jr.
International Journal of High Dilution Research , 2008,
Abstract:
Indicadores naturais de pH: usar papel ou solu o?
Terci Daniela Brotto Lopes,Rossi Adriana Vitorino
Química Nova , 2002,
Abstract: In this work, the fruit extracts of Morus nigra - mulberry, Syzygium cuminii - jambol o, Vitis vinifera grape, Myrciaria cauliflora - jabuticaba are suggested as pH indicators in the form of either solutions or paper. The pH indicator solutions were prepared by soaking the fruits or their peels in ethanol 1:3 (m/V) for 24 h, followed by simple filtration. The pH indicator papers were prepared by imersion of the qualitative filter paper strips in the pH indicator solutions. The different pH leads to color changes in the indicator solutions or papers and it can be used for teaching elementary chemistry concepts.
Hospital-Adapted Clonal Complex 17 Enterococcus Faecium Found among Sand Enterococcal Isolates  [PDF]
Daniela Pinto, Marta Ruivo, Peter Vandamme, Maria de F. S. Lopes
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.31010
Abstract: Though poorly studied, sand is an environment with an extended degree of interaction with man. Enterococcal strains can be found in sand but we do not know to what extent these ubiquitous opportunistic nosocomial pathogens isolated from sand carry antimicrobial resistances and virulence traits. In an attempt to fill in this knowledge gap, two distinct types of sand (beach and children playground) were examined concerning composition in enterococcal species, genetic diversity of isolates and abundance of resistance to antimicrobials and virulence traits. Five different species were found, namely Enterococcus faecium, Enterococcus faecalis, Enterococcus hirae, Enterococcus flavescens and Enterococcus casseliflavus. Although genetic diversity was evident, two different E. faecium clones, common to the two types of sand, were detected, suggesting the existence of clones well adapted to this specific environment or from a common source. E. faecium was associated with multiple antibiotic resistances, including to fluoroquinolones and tetracycline that are commonly used by veterinarians and clinicians. Among the multiresistant E. faecium strains from beach sand, two were from sequence type (ST) 442, which belongs to the wide-spread Hospital-adapted clade CC17. They both carried the esp gene and the genomic island associated with CC17. The other virulence factors screened were disseminated among E. faecalis strains, but seldom detected in the other species, evidencing the existence, in these environments, of E. faecalis strains carrying the same virulence factors as the clinical ones. The present work thus stresses the need to follow-up the presence and characterization of enterococcal strains from both beach and children playground sands and of including these environments in the epidemiological global analysis of enterococcal isolates.
Teaching and Learning with Structured Knowledge Maps: An Analysis about the New Approach  [PDF]
Nayara Silva Costa, Carlos Alberto Lopes da Silva, Daniela Carvalho Monteiro Ferreira, Luciano Vieira Lima
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.715218
Abstract: The aims of this paper are to present two methods combined for teaching and learning processes based on the Categories Theory and Knowledge Maps, and to invite the academic community, in different areas of knowledge, particularly in education, to reproduce the experiment in order to support the results, contributing to its maturity and its continuous improvement. In the end, we present a case study for an undergraduation course and discuss the results presenting a model for a digital ecosystem with web and mobile applications.
Characterization of the Sexual Self- and Cross-Compatibility in Genotypes of Cacao  [PDF]
Samuel Martins de Jesus Branco, Daniela Viana da Silva, Uilson Vanderlei Lopes, Ronan Xavier Corrêa
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.99131
Abstract: Cacao is a tree crop of high economic importance and the subject of several studies aiming the genetic improvement of the species with the incorporation of characteristics that are agronomically important to create superior genotypes. In this context, this study aimed to characterize 22 genotypes of cacao for sexual compatibility, which is a trait that is strongly associated with yield. Additionally, we identify genotypes incompatible with clone TSH-1188 through controlled intercrosses, due to the great importance of this clone in cocoa breeding. Fifteen genotypes were characterized as self-incompatible and other seven as self-compatible, considering the retention index (20%) of self-pollinated flowers. Nine genotypes were characterized for the first time: CCN-16, COCA-3310, COCA-3370/5, EB-1017, IMC-119, IMC-97, LCTEEN-37A, NA-45, and UF-612. Cacao genotypes showed flower retention index ranging from 0.0% to 55.1% after 15 days of self-pollinations. The number of retained flowers varied after self-pollination of cacao genotypes at 1, 5 and 15 days after pollination. CCN-51, Catongo, CCN-10 and P-4B, were the genotypes with minor losses of flowers after 15 days of pollination, while IMC-119 and TSH-516 had 100% of loss of flowers between 1 and 5 days after pollination. Moreover, the flower retention index 15 days after cross-pollination with TSH-1188 ranged from 0.0% to 87.5% among the tested genotypes. The results of cross-pollinations identified two genotypes that are incompatibles, EB-1017 and IMC-119. This result is important for future allelic studies of incompatibility in cacao, because it might indicate that these genotypes share the same self-incompatibility allele(s). We conclude, therefore, that this study enable the characterization of this working collection of cocoa germplasm for sexual compatibility and this information is important for subsequent crosses between cacao genotypes.
Barreiras percebidas e hábitos de atividade física de adolescentes escolares de uma cidade do sul do Brasil
Dambros, Daniela Dressler;Lopes, Luis Felipe Dias;Santos, Daniela Lopes dos;
Revista Brasileira de Cineantropometria & Desempenho Humano , 2011, DOI: 10.5007/1980-0037.2011v13n6p422
Abstract: the purpose of this study was to analyze physical activity (pa) habits and perceived barriers to pa in high school students from the municipality of santa maria, state of rio grande do sul, brazil. a total of 424 students with a mean age of 15.69 (± 0.9) years, 54.72% of them male and 45.28% female, took part in the study. the third part of the compac questionnaire was used to assess physical activity habits, and the questionnaire developed by martins and petroski (2000), adapted for this study population, to investigate perceived barriers to physical activity. the main perceived barriers were time devoted to studies, absence of an exercise partner, poor weather and long work hours. girls perceived more barriers than boys. nearly one-third of participants (32.35%) were considered insufficiently active. engagement in moderate to vigorous pa differed significantly (p<0.05) between genders, girls being less active. walking was the most widely practiced activity among girls (76.04%), whereas boys favored soccer (71.90%). there were significant differences in pa between private and public school students; those enrolled in state-run schools were most active. our results can serve as a reference for specific actions designed to promote physical activity and health.
Perceived barriers to physical activity in adolescent students from a Southern Brazilian city. 10.5007/1980-0037.2011v13n6p422
Daniela Dressler Dambros,Luis Felipe Dias Lopes,Daniela Lopes dos Santos
Revista Brasileira de Cineantropometria e Desempenho Humano , 2011,
Abstract: The purpose of this study was to analyze physical activity (PA) habits and perceived barriers to PA in high school students from the municipality of Santa Maria, state of Rio Grande do Sul, Brazil. A total of 424 students with a mean age of 15.69 (±0.9) years, 54.72% of them male and 45.28% female, took part in the study. The third part of the COMPAC questionnaire was used to assess physical activity habits, and the questionnaire developed by Martins and Petroski (2000), adapted for this study population, to investigate perceived barriers to physical activity. The main perceived barriers were time devoted to studies, absence of an exercise partner, poor weather and long work hours. Girls perceived more barriers than boys. Nearly one-third of participants (32.35%) were considered insufficiently active. Engagement in moderate to vigorous PA differed significantly (p<0.05) between genders, girls being less active. Walking was the most widely practiced activity among girls (76.04%), whereas boys favored soccer (71.90%). There were significant differences in PA between private and public school students; those enrolled in state-run schools were most active. Our results can serve as a reference for specific actions designed to promote physical activity and health.
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