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Search Results: 1 - 10 of 477080 matches for " Luana Lucas de Sá Almeida Veloso "
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Growth and Photosynthetic Pigments of Cotton Cultivars Irrigated with Saline Water  [PDF]
Elka Costa Santos Nascimento, Ronaldo do Nascimento, André Alisson Rodrigues da Silva, Carlos Vailan de Castro Bezerra, Mateus Costa Batista, Luana Lucas de Sá Almeida Veloso, Márcia Cristina de Araújo Pereira, Hallyson Oliveira
Agricultural Sciences (AS) , 2019, DOI: 10.4236/as.2019.101007
Abstract: The cultivation of cotton is a relevant socioeconomic activity in the Brazilian agricultural scenario. In the Brazilian Northeast, however, production is limited by low rainfall, requiring water supplementation, a problem for the cotton cultivation practiced in the semi-arid region, due to the presence of saline ions in several water sources, from where the water is used for irrigation. It is necessary to identify cultivars that better tolerate saline stress in order to provide subsidies for their cultivation under such conditions. In this sense, the objective was to evaluate the tolerance of cotton cultivars to salinity. The experiment was conducted in a greenhouse, belonging to the Natural Resource Technology Center of the Federal University of Campina Grande, Campus I, Campina Grande, Brazil, in a completely randomized design in a 2 × 5 factorial scheme, with four replications, totaling 40 experimental units (BRS 368 RF and BRS SAFIRA) submitted to five saline levels (1.5, 3.0, 4.5, 6.0 and 7.5 dS·mˉ1). Irrigation with water saline of EC from 1.5 dS·mˉ1 affects adversely the growth of cotton cultivars, causing reductions in plant height, stem diameter, leaf area and number of leaves. Saline stress reduced the levels of the photosynthetic pigments of the cotton plants studied.
Study on the most appropriate scale for use in questionnaires: an experiment with Kano’s model Estudo sobre escala mais adequada em questionários: um experimento com o modelo de Kano
Larissa Rodrigues Barcellos Martins,Lucas de Sant′Anna Pereira,Luana Maravilha de Almeida,Henrique Rego Monteiro da Hora
Vértices , 2011,
Abstract: This paper presents a comparative study of three questionnaires of different levels. The objective of this paper is to determine which questionnaire is most adequate for measuring service quality at a university library in the municipality of Campos dos Goytacazes. The data collection consisted in the application of three kinds of questionnaires of different answer levels (2 levels, 4 levels, and 6 levels) with the same 22 pairs of functional and dysfunctional questions. The questionnaires follow Kano’s model. The use of this model allows the classification of attributes in as much as 6 categories (qualities): must-be, one-dimensional, attractive, indifferent, reverse, and questionable. To verify which scale is the most reliable, Cronback’s Alpha statistic method was used. Questionnaires will be more reliable as the most adequate scale can be found. The conclusion is that the classification of attributes of quality is different for each level of answer used in the questionnaires. Consistent with Cronback’s Alpha, the use of questionnaires with 6 levels of answer is recommended, since it presents high reliability in the results. With the classification of attributes, the library coordination will be able to invest in really relevant attributes to increase the user satisfaction. Esse trabalho apresenta um estudo comparativo de três questionários com diferentes níveis de respostas. Seu objetivo é definir o questionário mais adequado para mensurar a qualidade do servi o de biblioteca de uma institui o de ensino superior no município de Campos dos Goytacazes. Os dados ser o coletados a partir da aplica o de três tipos de questionário com níveis diferentes de respostas (2 níveis, 4 níveis e 6 níveis) com os mesmos 22 pares de perguntas funcionais e disfuncionais. Os questionários seguem o modelo de Kano. A utiliza o desse modelo permite a classifica o dos atributos em até 6 categorias: obrigatório, unidimensional, atrativo, neutro, reverso e questionável. Para a verifica o de qual escala possui maior confiabilidade utiliza-se o método estatístico Alfa de Cronbach. Com a defini o da melhor escala a ser usada teremos questionários mais confiáveis. Conclui-se que a classifica o dos atributos da qualidade é diferente para cada nível de resposta utilizada nos questionários. De acordo com o Alfa de Cronbach, recomenda-se a utiliza o do questionário de 6 níveis de respostas, pois apresenta alta confiabilidade nos resultados. Após a classifica o dos atributos a coordena o da biblioteca poderá investir naqueles atributos realmente relevantes visando a aument
Diagnóstico da tuberculose em pessoas idosas: barreiras de acesso relacionadas aos servi os de saúde El diagnóstico de la tuberculosis em las personas mayores: las barreras relacionadas con el acceso a los servicios de salud Tuberculosis diagnosis in the aged: barriers to accessing health services
Annelissa Andrade Virgínio de Oliveira,Lenilde Duarte de Sá,Jordana de Almeida Nogueira,Séfora Luana Evangelista de Andrade
Revista da Escola de Enfermagem da USP , 2013,
Abstract: Este estudo tem como objetivo analisar as barreiras ao diagnóstico da tuberculose em idosos relacionadas aos servi os de saúde no município de Jo o Pessoa-PB. Trata-se de pesquisa qualitativa que envolveu sete pessoas idosas doentes de tuberculose. Entrevistas foram utilizadas para coletar informa es. O material empírico foi organizado com o software Atlas.tivers o 6.0 e analisado conforme a técnica de análise de discurso. As barreiras relacionadas ao acesso para confirma o diagnóstica foram: horário de funcionamento das unidades de saúde da família; transferência de responsabilidades; visitas domiciliares sem controle de comunicantes; demora do servi o de saúde em suspeitar da doen a e repetidas idas do doente ao servi o de saúde para a obten o do diagnóstico. Apesar de terem sido identificadas barreiras comuns às encontradas por doentes de tuberculose de um modo geral, em virtude da vulnerabilidade dos idosos, sugerem-se que a es de controle sejam empreendidas pelos servi os de saúde de modo a evitar que a doen a torne-se um agravo comum para essa popula o. Se objetiva analizar las barreras al diagnóstico de tuberculosis en ancianos relacionadas a servicios de salud en Jo o Pessoa-Paraíba. Investigación cualitativa involucrando siete ancianos enfermos de tuberculosis. Informaciones recolectadas mediante entrevistas. El material empírico fue organizado con el software Atlas.ti 6.0 y sometido a técnica de análisis de discurso. Las barreras relacionadas al acceso para confirmación diagnóstica fueron: horario de funcionamiento de las unidades de salud de la familia; transferencia de responsabilidades; visitas domiciliarias sin control de comunicantes; demora del servicio sanitario en sospechar la enfermedad y repetidas visitas del enfermo al servicio de salud para obtener el diagnóstico. A pesar de haber sido identificados obstáculos similares a los encontrados por tuberculosos en general, en virtud de su vulnerabilidad, se sugiere que las acciones de control en ancianos sean emprendidas por los servicios de salud intentando evitar que la enfermedad se convierta en una patología común en dicho segmento poblacional. This study was performed with the objective to analyze the barriers to diagnosing tuberculosis in the aged and access to health services in the city of Jo o Pessoa, Paraíba, Brazil. This qualitative study included the participation of seven aged women with tuberculosis. Interviews were used for data collection. The empirical material was organized using Atlas.ti 6.0, and analyzed according to the techniques of discourse analysis. The ident
Ferrous Xylenol Gel measurements for 6 and 10 MV photons in small field sizes
Oliveira, Lucas N. de;Guzmán Calcina, Carmen S.;Parada, Marco A.;Almeida, Carlos E. de;Almeida, Adelaide de;
Brazilian Journal of Physics , 2007, DOI: 10.1590/S0103-97332007000700012
Abstract: the fricke dosimeter is a ferrous sulfate aqueous solution that, when irradiated, oxidizes the fe2 + ions to fe3 + . this new concentration, generally determined through spectrophotometry, is directly proportional to the ionizing radiation absorbed energy. the fricke xylenol gel dosimeter (fxg) was developed through the incorporation of swine skin gelatin and xylenol orange. these modifications provided better signal stability and sensitivity for lower absorbed dose measurements, such as those used in radiotherapy. in this work fxg samples were irradiated with absorbed doses of 2 gy, from 6 mv and 10 mv photons, using small field sizes geometry for dosimetric parameters determination. all the fxg dosimeter readings were accomplished with our specially developed spectrophotometer, using a narrow light beam at the wavelength of 585 nm, where the highest absorbance sensitivity occurs. from our results, we can confirm not only that the fxg dosimetric system (fxg plus a high lateral spatial resolution spectrophotometer) can be used for general dosimetry, but as well for small field size dosimetry of interest in radiosurgery.
Improvement of a PCR test to diagnose infection by Mansonella ozzardi
Vera, Luana Janaína Souza;Basano, Sergio de Almeida;Camargo, Juliana de Souza Almeida Aranha;Fran?a, Andonai Krauze de;Ferreira, Ricardo de Godoi Mattos;Casseb, Almeida Andrade;Medeiros, Jansen Fernandes;Fontes, Gilberto;Camargo, Luís Marcelo Aranha;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011000300023
Abstract: introduction: mansonelliasis is caused by mansonella ozzardi. it is widespread in the amazon region, with a high prevalence. the common exam of thick blood smears stained with giemsa shows low efficacy levels and has been an obstacle to diagnosing individuals with low blood parasitemia. methods: in order to increase diagnosis efficacy, the pcr technique was improved. results and conclusions: pcr demonstrated the best performance, with sensitivity and negative predictive values (npv) of 100%, followed by blood filtration through membrane filters, which showed a sensitivity of 88.9% and a npv of 84.6%, when compared to thick blood smears.
Clinical knowledge of dentists and physicians on the diagnosis and treatment of the patient complaining of halitosis
S. Vasconcelos, Laurylene César de;Veloso, Dejanildo Jorge;Cunha, Paula ?ngela S. M. Almeida;Vasconcelos, Laís César de;
Revista Odonto Ciência , 2011, DOI: 10.1590/S1980-65232011000300007
Abstract: purpose: to evaluate the knowledge of dentists and physicians about the diagnosis and treatment of the patient complaining of halitosis. methods: data were collected from a sample of healthcare professionals (81 dentists and 19 physicians) from the city of jo?o pessoa, brazil. a structured questionnaire was used to record the professional knowledge about halitosis: frequency, diagnosis, treatment and predisposing factors. results: physicians and dentists reported overall different responses based on their clinical knowledge and practice: patient's complaint of halitosis (63% and 38% for physicians and dentists, respectively); halitosis as the main complaint (42% and 23%); perception of halitosis among patients (10% and 67%), professional information to the patient about the halitosis (58% and 89%). periodontal disease, poor oral hygiene and caries were regarded as the most common causes of halitosis for dentists, but physicians believed that oral cavity changes, sinusitis and reflux disease were the main etiological factors. conclusion: the results suggest that there is not a high agreement between dentists and physicians regarding halitosis diagnosis and treatment.
Investigation of the occurrence of Mansonella ozzardi in the State of Rond?nia, Western Amazonia, Brazil
Basano, Sergio de Almeida;Camargo, Juliana de Souza Almeida Aranha;Vera, Luana Janaína de Souza;Velasques, Suzane Neves;Ogawa, Guilherme Maerschner;Medeiros, Jansen Fernandes;Fontes, Gilberto;Camargo, Luís Marcelo Aranha;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011005000055
Abstract: introduction: mansonella ozzardi, a human filarial nematode transmitted by diptera simuliidae flies (black flies), is widely spread in the amazon, while the occurrence of mansonelliasis in the state of rond?nia (western amazonia) has not been reported thus far. the existence of this parasitic disease in this state is investigated in this study. methods: a total of 4,452 people who lived alongside the madeira, mamore, guapore, machado and preto rivers, in the state of rond?nia, were examined using the thick blood smear method. alongside the machado and guapore rivers, 2,112 adult simuliid specimens were captured. results: infected people were not reported, although simuliids with vector potential such as cerqueirellum pydanielli, c. argentiscutum and c. amazonicum were found. conclusions: this study registered no infected people. this finding may be explained by the individuals' low level of microfilaremia that is below the limit of detection of the diagnostic method used in the study or insufficient migration of people infected with m. ozzardi from endemic areas, making it impossible to introduce the disease into rond?nia. further studies using more sensitive diagnostic techniques could shed light on this question.
Analysis of a marine phototrophic biofilm by confocal laser scanning microscopy using the new image quantification software PHLIP
Lukas N Mueller, Jody FC de Brouwer, Jonas S Almeida, Lucas J Stal, Jo?o B Xavier
BMC Ecology , 2006, DOI: 10.1186/1472-6785-6-1
Abstract: PHLIP is an open source public license Matlab toolbox that includes functions for CLSM imaging data handling and ten image analysis operations describing various aspects of biofilm morphology. The use of PHLIP is here demonstrated by a study of the development of a natural marine phototrophic biofilm. It is shown how the examination of the individual biofilm components using the multi-channel capability of PHLIP allowed the description of the dynamic spatial and temporal separation of diatoms, bacteria and organic and inorganic matter during the shift from a bacteria-dominated to a diatom-dominated phototrophic biofilm. Reflection images and weight measurements complementing the PHLIP analyses suggest that a large part of the biofilm mass consisted of inorganic mineral material.The presented case study reveals new insight into the temporal development of a phototrophic biofilm where multi-channel imaging allowed to parallel monitor the dynamics of the individual biofilm components over time. This application of PHLIP presents the power of biofilm image analysis by multi-channel CLSM software and demonstrates the importance of PHLIP for the scientific community as a flexible and extendable image analysis platform for automated image processing.Interfacial biofilms constitute an important reservoir of microbial life in aquatic systems. The main focus of biofilm research has been on the examination of bacterial biofilms (reviewed in [1]), which cause widespread problems in industrial fluid processing applications (reviewed in [2]) and play a major role in human infection diseases [3]. In general, growth of biofilms is initiated by the attachment of cells to a conditioned substratum, after which in situ growth of micro-organisms and production of extracellular matrix components build up the biofilm structure [4]. Many studies have investigated the physiology and structure of bacterial biofilms in order to understand the underlying processes of attachment, detachment and
Accuracy of Rapid Prototyping Biomodels Plotted by Three Dimensional Printing Technique: Ex Vivo Study  [PDF]
Lucio Costa Safira, Luana Costa Bastos, Valter Estev?o Beal, Roberto Almeida de Azevedo, Carlos Eduardo Francischone, Viviane Almeida Sarmento
Advances in Computed Tomography (ACT) , 2013, DOI: 10.4236/act.2013.22008
Abstract: The rapid prototyping biomodels manufacturing is a recent technology with great importance in oral and maxillofacial surgery. It provides a better surgical planning, decrease of anesthesia time and great functional and esthetic results. The aim of this experimental study was to evaluate the accuracy of rapid prototyping biomodels built by three-dimensional printing (3DP) technique, since this is one of the least expensive methods available. Linear measurements of standardized bone defects and anatomic distances were compared using a digital caliper of high precision in nine dry mandibles (gold standard) and their respective biomodels. The Bland-Altman test was used for statistical analysis (5% level of significance). The results showed strong concordance between the dry mandibles and their respective biomodels, with discrepancies smaller than 2 mmin most cases (97.4%). We can conclude that the biomodels built by 3DP technique can be used for surgical planning in Dentistry.
Diabetes mellitus: fatores associados à prevalência em idosos, medidas e práticas de controle e uso dos servi?os de saúde em S?o Paulo, Brasil
Mendes, Telma de Almeida Busch;Goldbaum, Moisés;Segri, Neuber José;Barros, Marilisa Berti de Azevedo;Cesar, Chester Luiz Galv?o;Carandina, Luana;Alves, Maria Cecília Goi Porto;
Cadernos de Saúde Pública , 2011, DOI: 10.1590/S0102-311X2011000600020
Abstract: this study analyzes factors associated with diabetes prevalence according to demographic and socioeconomic variables, health status, and lifestyle among 872 elderly living in the city of s?o paulo, brazil, in addition to health services utilization and control measures and practices. reported diabetes prevalence among the elderly was 17.9%, a higher rate than in the adult population. the highest diabetes rates in elderly individuals were associated with: bad or very bad self-rated health, never having consumed alcohol or having stopped drinking, widowhood, and at least one hospitalization in the previous 12 months, independently of age. among the elderly, 69.9% routinely sought out health services due to their diabetes, and 96.1% received treatment at the services they turned to. there is a lack of information, knowledge, and use of control measures for diabetes among the elderly. health policies focusing on professional training and family orientation are needed to promote lifestyle changes among the elderly.
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