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Search Results: 1 - 10 of 50762 matches for " Rogério Frederico Alves Ferreira "
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Occlusal characteristics and orthodontic treatment need in black adolescents in Salvador/BA (Brazil): an epidemiologic study using the Dental Aesthetics Index
Arthur Costa Rodrigues Farias,Maria Cristina Teixeira Cangussu,Rogério Frederico Alves Ferreira,Marcelo de Castellucci
Dental Press Journal of Orthodontics , 2013,
Abstract: OBJECTIVE: The objective of this article is to evaluate the need of orthodontic treatment, prevalence and severity of the malocclusions in individuals of black ethnicity in a representative sample of schoolchildren of the city of Salvador/Brazil, as well as to verify if the malocclusion was affected by socio-demographic conditions such as age and gender. METHODS: The reference population was constituted of schoolchildren with age between 12 and 15 years, enrolled in public and private schools. The malocclusion was evaluated in 486 students of black ethnicity, with ages varying from 12 to 15 years, selected in random sample in multiple stages. The adopted significance level was 1% and the power of the test was 90%. A questionnaire registering demographic characteristics was filled out by each individual. The Dental Aesthetics Index (DAI) was used by previously calibrated examiners (kappa 0.89), according to criteria of the World Health Organization. RESULTS: It was verified that most of the individuals (76%) had little or any need for orthodontic treatment. About 24% showed a condition of severe malocclusion, culminating in a vital need for orthodontic treatment. The main occlusal characteristics found in the group with high need of orthodontic treatment were dental crowding and accentuated overjet. The age was positively related to the improvement of the maxillary overjet and to the presence of crowding. CONCLUSION: The development of public politics that aim the insertion of orthodontic treatment among the procedures of health programs, with the implementation and development of specialized centers, is fundamental. OBJETIVO: averiguar a necessidade de tratamento ortod ntico, prevalência e severidade das más oclus es em indivíduos negros numa amostra representativa de escolares da cidade de Salvador/BA (Brasil), além de determinar se as más oclus es eram afetadas por condi es sociodemográficas como idade e sexo. MéTODOS: o desenho epidemiológico foi transversal, e a popula o de referência se constituiu de escolares com idades entre 12 e 15 anos, matriculados em escolas de primeiro e segundo graus, públicas e privadas. Participou do estudo um total de 486 indivíduos sorteados em amostra probabilística em múltiplo estágio. O nível de significancia adotado foi de 1% e o poder do teste foi de 90%. Aos participantes foram aplicados questionários registrando características demográficas e, depois, avaliados por examinadores previamente calibrados (Kappa 0,89), utilizando-se o índice de Estética Dentária (IED) segundo critérios da Organiza o Mundial de Saúd
Avalia??o da atividade antimicrobiana de adesivo ortod?ntico associado a verniz de clorexidina e timol na colagem de braquetes
Calabrich, Carolina Freire de Carvalho;Barbosa, Marcelo de Castellucci e;Simionato, Maria Regina Lorenzetti;Ferreira, Rogério Frederico Alves;
Dental Press Journal of Orthodontics , 2010, DOI: 10.1590/S2176-94512010000400010
Abstract: objective: to assess the antimicrobial activity resulting from the association of an orthodontic adhesive with chlorhexidine-thymol varnish. methods: thirty-two extracted human premolars were used, divided into four groups. in group 1, the control group, the adhesive used to bond the bracket was not associated with any antimicrobial agent. groups 2, 3 and 4 were bonded with an adhesive system associated with chlorhexidine-thymol varnish. groups 3 and 4 were stored in water for 7 days and 30 days, respectively, while the specimens from group 2 were, soon after bonding, placed on agar seeded with streptococcus mutans for 48 hours, at 37o c. results: the experimental groups, with the exception of the control group, showed antimicrobial activity whose action tended to decline commensurately with the amount of time that they remained immersed in water. conclusions: the association of chlorhexidine-thymol varnish with an adhesive system used in orthodontics proved to be advantageous due to its antimicrobial activity.
Análise do termo de primeira ordem das séries de Molodenskii para o problema de valor de contorno da geodésia
Ferreira, Vagner Gon?alves;De Freitas, Silvio Rogério Correia;
Boletim de Ciências Geodésicas , 2010, DOI: 10.1590/S1982-21702010000400005
Abstract: the main purpose of this paper is to evaluate the first-order term of the molodenskii series by using different approaches, which approaches are: the solution given by molodenskii; the solution using the vertical gradient in accordance with moritz as an approximation of term; and by using the terrain correction which is an approximation for . the two first solutions are coherent with each other under the conditions here analyzed. the comparison was made in terms of the first order height anomaly. considering the final quasi-geoid, the use of terrain correction instead of the term was efficient in terms of the evaluation by using independent data; in this case, 42 gps points on benchmarks. the methodology, results and discussions, conclusions and practical recommendations are presented in the paper.
Efeito do armazenamento na qualidade fisiológica das sementes de popula??es de milho cultivadas sob estresses hídrico e mineral
Guar?oni, Rogério Carvalho;Dur?es, Frederico Ozanan Machado;Magalh?es, Paulo César;Silva, Roberto Ferreira da;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001001200005
Abstract: the objective of this work was to evaluate the storage effect on seed physiological quality of five tropical maize (zea mays l.) populations, under stress conditions, including acid soil and drought. five maize populations (cms06, cms35, cms36, cms54 and milho metro) were cultivated in soils with two types of fertility (67% of base saturation and 54% of al saturation), with and without irrigation during flowering. after harvest, the seeds were stored in the laboratory under environmental conditions. the physiological quality of seeds, germination and vigor, were determined in the start of the storage, 30, 90 and 210 days after starting storage. the seeds of the population cms36 presented higher vigor when produced under high aluminum saturation. the population cms54 presented highest stability related to physiological quality. the seeds of the populations cms35, cms36, cms54 and milho metro presented higher stability related to physiological quality than the cms06, during storage.
Efeito do armazenamento na qualidade fisiológica das sementes de popula es de milho cultivadas sob estresses hídrico e mineral
Guar?oni Rogério Carvalho,Dur?es Frederico Ozanan Machado,Magalh?es Paulo César,Silva Roberto Ferreira da
Pesquisa Agropecuária Brasileira , 2001,
Abstract: O objetivo deste trabalho foi avaliar o efeito do armazenamento na qualidade fisiológica de sementes de cinco popula es de milho submetidas aos estresses de Al no solo e de seca no florescimento. Cinco popula es de milho (CMS06, CMS35, CMS36, CMS54 e Milho Metro) foram cultivadas em solos com dois níveis de fertilidade: o primeiro, apresentando alta satura o de bases (V = 67%), e o segundo, alta satura o de Al (m = 54%). As popula es de milho foram também submetidas à irriga o plena e à supress o de irriga o durante o florescimento. As sementes obtidas dessas popula es foram armazenadas no laboratório de sementes sob condi es ambientais. A qualidade fisiológica das sementes foi determinada no início e aos 30, 90 e 210 dias de armazenamento. As sementes da popula o CMS36 apresentaram maior vigor quando produzidas em solos com alta satura o de alumínio. A popula o CMS54 foi a mais estável com rela o à qualidade fisiológica das sementes produzidas em diferentes ambientes. As sementes das popula es CMS35, CMS36, CMS54 e Milho Metro foram mais estáveis com rela o à qualidade fisiológica, durante o período de armazenamento, do que as da CMS06.
Análise de deforma??o por varia??o do geopotencial: estudo de caso para o terremoto maule (Mw 8,8) com base em dados mensais da miss?o Grace
Castro, Henry Montecino;Ferreira, Vagner Gon?alves;Freitas, Sílvio Rogério Correia de;
Boletim de Ciências Geodésicas , 2012, DOI: 10.1590/S1982-21702012000100005
Abstract: chile is a natural laboratory for studies of geodynamics due to of the broad and varied of tectonic events. a notable case is the deformation produced from the seismic event of magnitude mw 8,8, named earthquake the maule. the epicenter was located 60 km to south of constitucion, a region that had shown considerable velocities recorded by gnss. several studies related to the geophysical signal generated by the earthquake have been made, particularly those explored by gnss and insar, and one based on satellite gravimetry. however, these studies have presented difficulties concerning time series analysis. most of the series of gnss positioning have been discontinued by the event and therefore there are only series either before or after the event. this study presents an independent alternative for the quantification of vertical deformation of the crust based on variations of the potential anomalous provided by stokes coefficients of the monthly grace mission. differences in height anomaly from september 2009 to may 2011, obtained by the temporal variation of the stokes coefficients regarded a static solution were calculated for four stations (llfn, antc, conz, valp). the stokes coefficients were used in an expansion up to degree and order 45. the hydrologic signal was removed by means of ewt (equivalent water thickness) after a gaussian smoothing filter of 600 kmwas applied. the results obtained after filtering are higly consistent to those reported by gnss in other investigations.
Fotopedologia e pedologia espectral orbital associadas no estudo de solos desenvolvidos de basalto
Demattê, José A. M.;Ferreira, Fernando Perobelli;Alves, Marcelo Rodrigo;Campos, Rogério Costa;
Bragantia , 2011, DOI: 10.1590/S0006-87052011000100018
Abstract: the state of mato grosso do sul (ms) is one of the main brazilian producers in the agricultural sector. to maintain this status, however, it will be necessary both to know and use rationally its soil resources. this way, it will be necessary methods of soil research that are efficient and fast in obtain information, as well as of low-cost to support land use planning. since relief is an important factor of soil formation, aerial photos and satellite images analysis can be used to detect landscape features that help to characterize and discriminate soils. therefore, the goals of this study were: (a) to identify different soil classes and verify their relationships with landscape aspects by the interpretation of aerial photos; and (b) to use radiometric data, obtained from satellite images analysis, to discriminate soils or groups of soils on landscape. to do so, it was evaluated the relationship between soil classes and relief and drainage aspects, obtained by the interpretation of aerial photos in conjunction with spectral data obtained by satellite image analysis of 14 circular samples (cs) of the maracaju city in the ms state. the drainage density (dd), determined in the cs, showed positive correlation with the soil ki index and base saturation (v%) index, thus allowing discriminate soil classes of the studied area with 85.7 % of certainty, whereas the spectral data only discriminated soils by the textural classes of their surface layer. on the other hand, it was also observed that soils with fe2o3 content higher than 180 g kg-1 had their textural classes poorly differentiated by using the spectral data.
Avalia??o do látex e da borracha natural de clones de seringueira no Estado de S?o Paulo
Moreno, Rogério Manoel Biagi;Ferreira, Mariselma;Gon?alves, Paulo de Souza;Mattoso, Luiz Henrique Capparelli;
Pesquisa Agropecuária Brasileira , 2003, DOI: 10.1590/S0100-204X2003000500005
Abstract: the objective of the present paper was to evaluate the parameters of latex and natural rubber from four clones of rubber tree [hevea brasiliensis (willd. ex adr. de juss.) muell.arg.] planted in large scale in cambuhy plantations in s?o paulo state, brazil. latex from 20 trees of each 12-year-old clones viz. gt 1, pb 235, ian 873 and rrim 600 following the 1/2s d/3 6d/7. 11m/y. et 5.0%. pa 12/y tapping system in the fourth year of yielding. the studied parameters were percentages of dry rubber content (drc), ashes and nitrogen, wallace plasticity (po), plasticity retention index (pri) and mooney viscosity (vr). results indicated a trend of reduction in drc with decreasing temperatures (r = 0.75). results of ashes percentages and n percentages indicated a behavior opposite to drc, increasing with the decreasing temperature along the year. a high correlation value (r = 0.93) was obtained between po and vr. the high values obtained for po and vr indicate that the rubber studied should be considered as hard rubbers. the pri values for these clones were considered low and are associated with a low resistance to thermal degradation. the results obtained indicate a strong influence of climatic conditions on some properties of the lattices and natural rubber for the studied clones. such parameters suggest an important condition to understand the behavior of these clones.
Technological properties of latex and natural rubber of Hevea brasiliensis clones
Moreno, Rogério Manoel Biagi;Ferreira, Mariselma;Gon?alves, Paulo de Souza;Mattoso, Luiz Henrique Capparelli;
Scientia Agricola , 2005, DOI: 10.1590/S0103-90162005000200005
Abstract: rubber industry has increased the requirements for quality and uniformity of natural rubber produced in brazil. technological properties of latex and natural rubber of clones gt 1, pb 235, ian 873 and rrim 600 [hevea brasiliensis (willd. former adr. de juss.) muell.- arg] were evaluated by standard methods of the dry rubber content (drc%), percentage of nitrogen (n%) and percentage of ashes (ash%) in two consecutive years; data were correlated with temperature and precipitation. properties of latex and natural rubber varied (p < 0.01) as a function of clone type and among tappings. drc decreased in the beginning of the dry season (may to june) and n% and ash% increased in the same period. april to june was a critical period, when n% was above 0.60%, out of standards established by the technical standard abnt/nbr in brazil. clone rrim 600 was less susceptible to climatic variations.
Avalia o da reprodutibilidade ultrassonográfica como método para medida do tecido subcutaneo da ponta nasal
Naves, Marcell de Melo,Sousa, Rogério Costa,Tomé, Raphael Alves Ferreira,Damian, Nicholas Godoy Canazza
Arquivos Internacionais de Otorrinolaringologia , 2011,
Abstract: Introdu o: A prévia avalia o da anatomia do paciente é fundamental para atingir uma ponta nasal bem definida em rinoplastia. A espessura do tecido subcutaneo é essencial para a harmonia estética dessa regi o. Técnicas de mensura o dessas estruturas no paciente "in vivo" n o est o padronizadas na literatura. Objetivo: Avaliar a variabilidade interobservador do método ultrassonográfico para medida da espessura do tecido subcutaneo da ponta nasal por de ultrasonografia. Método: 47 voluntários submeteram-se a ultrasonografia da ponta nasal por dois especialistas em radiologia que utilizaram a mesma técnica de exame com transdutor eletr nico linear na frequência de 5 a 9 MHz. Avaliou-se a espessura do tecido subcutaneo através da medida do ponto de maior proje o do domo da cartilagem alar maior até a pele. Estudo prospectivo. Resultados: As médias das medidas do tecido subcutaneo da ponta nasal obtidas pelos examinadores n o apresentaram diferen as estatisticamente significante (p = 0.5303). Na análise da reprodutibilidade entre examinadores encontrou-se coeficiente de correla o interclasse r (Pearson) 0,9333, isto é, uma excelente reprodutibilidade interobservadores. Conclus o: A ultrassonografia demonstrou-se reprodutível e excelente concordancia entre os examinadores para avalia o da espessura do tecido subcutaneo da pele, auxiliando o cirurgi o na análise pré-operatória do paciente e na escolha da melhor técnica cirúrgica para cada caso.
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