bluuebunny/crossref_metadata_2025 huggingface dataset:
SEEDLING GROWTH OF TREE SPECIES UNDER DOSES OF HYDROGEL AND TWO LEVELS OF LUMINOSITY
Authors: Pontes Filho Roberto Albuquerque , Gondim Franklin Aragão , Costa Mirian Cristina Gomes
Published: August 2018

ABSTRACT Hydrogels (polyacrylamide compounds) are recommended in agriculture and forestry as soil conditioners because they are able to absorb water and increase its stocks in the soil. The aim of this study was to determine the most suitable dose of hydrogel to establish seedlings of Enterolobium contortisilliquum (Vell.) Morong under two levels of luminosity. Seedlings of Enterolobium contortisilliquum (Vell.) Morong were planted in pots, following a design of subdivided plots, consisting of two levels of luminosity in the plots: full sun and 50% luminosity, and 10 doses of hydrogel in the sub-plots: 0.0, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5 and 6.0 g L-1. Seventy-two days after the seedlings were transplanted to the pots, plant height and diameter were determined, together with the height to diameter ratio, root length and diameter, shoot and root dry weight, and the shoot to root ratio. The lowest ratios between height and stem diameter (8.50 and 8.68) occurred in the seedlings in full sun at the doses of 0 and 2 g hydrogel L-1 respectively. For shaded seedlings the lowest ratio (8.14) occurred at the dose of 3.0 g L-1, but with a lower coefficient of determination (R2 = 0.68). Shoot dry weight increased with the dose of 2 g L-1 in full sun, and 3.5 g L-1 under shaded conditions. The doses of hydrogel giving the best initial development in seedlings under evaluation were 2 g L-1 in full sun and 3.5 g L-1 in the shaded environment. Although a response by the species to the doses of hydrogel was found, the benefits of the polymer were not evident under the conditions of the present study.
MORPHOLOGICAL, PHYSICAL AND THERMAL CHARACTERIZATION OF MICROFIBRILLATED CELLULOSE
Authors: Lengowski Elaine Cristiana , Muñiz Graciela Inês Bolzon de , Andrade Alan Sulado de , Simon Leonardo Coelho , Nisgoski Silvana
Published: August 2018

ABSTRACT The aim of this study was to characterize microfibrillated cellulose (MFC) produced with a Masuko Sangyo Super Masscolloider using bleached and unbleached pulp of Eucalyptus spp. The MFC was characterized regarding morphology (TEM), crystallinity, viscosity, zeta potential and thermal properties (TGA). Regardless of the fiber type, the processing dramatically reduced the dimensions of the material, so as to obtain structures with nanometric dimensions. MFC produced with unbleached pulp preserved the original brown color of the pulp, which may be advantageous for some applications in the packaging sector, while films produced with bleached pulp were more translucent. The MFC showed lower values of viscosity and crystallinity index in relation to cellulosic pulp. The zeta potential was influenced by the type of fiber used. The main thermal transitions in MFC occurred after 200 ºC, demonstrating the potential of this material forhigh-temperature applications.
EFFECTS OF URBAN SPRAWL ON FOREST CONSERVATION IN A METROPOLITAN WATER SOURCE AREA
Authors: Romero Amanda Caetano , Issii Thais Martins , Pereira-Silva Erico Fernando Lopes , Hardt Elisa
Published: August 2018

ABSTRACT The clearing of native vegetation in water source areas and its effects on water supply availability have become a major concern in large metropolises. This study examined the spatial and temporal changes in land use and cover and their effects on the conservation of Atlantic Forest in a water source area in the Metropolitan Region of São Paulo that is the second most densely populated territory in Brazil, the municipality of Diadema. Historical maps and trend scenarios were developed by applying the Markov chain in association with cellular automata. Forest conservation was assessed based on a set of landscape metrics of resource availability, fragment isolation, and trends of forest fragmentation. Our findings revealed an increase in urban growth of 37% in the last five decades directly associated to the clearing of 50% of forests in intermediate/advanced stages and 40% in early stages. The main drivers of landscape change were human-modified fields (41%) and net roads (54%). Optimal resource availability was drastically reduced (75%) while isolation increased (361.5%) among existing forest fragments. Therefore, future trends indicate that, without changes in the management of the area, deforestation may occur rapidly and continuously until 10% of forest remains, leading to potential adverse effects on water availability and quality of the Billings Reservoir and the local biodiversity.
CHEMICAL COMPOSTION OF TAURUS FIR (Abies cilicica subsp. isaurica) OLEORESIN
Authors: Pekgözlü Ayben Kilic , Ceylan Esra
Published: August 2018

ABSTRACT The main objective of this study was to determine the chemical composition of both turpintine and colophony parts of Abies cilicica subsp. isaurica (Taurus fir) oleoresin collected from Mersin-Turkey. Colophony of taurus fir was not performed before. Hydro-distillation was applied for the separation of turpentine and colophony. Samples were analyzed separately by FID-GC and GC-MS. The yield of oleoresin was 14,3 % turpentine and 82,5 % colophony. Fourty-six compounds were found in the turpentine where α-pinene (81,2 %) was the major compound with β-pinene (12,6 %). However, in the colophony abietane type resin acids were forming the main group (abietic 46,8%, neoabietic 29,5%). Resin hydrocarbons and terpenes were identified in the unsaponified fraction of colophony of Taurus fir. High α-pinene and abietic acid contents make this oleoresin to be used in pharmacy and chemical industries.
GENETIC DIVERGENCE IN POPULATIONS OF Caryocar brasiliense Camb. FROM THE PHYSICAL CHARACTERISTICS OF THE FRUITS
Authors: Santos Paulo Henrique Rodrigues dos , Giordani Samuel Cunha Oliveira , Soares Blenda Calazans , Silva Fernando Higino Lima e , Esteves Elizabethe Adriana , Fernandes José Sebastião Cunha
Published: August 2018

ABSTRACT The study of the genetic and phenotypic variability of the populations of Caryocar brasiliense Camb. assists in strategies for conservation and breeding of the specie. The objective of this work was to characterize the genetic diversity through the physical characteristics of pequi fruits of two populations through uni and multivariate analysis, as well as the implications in their domestication and breeding. Fruits were harvested from 20 mother trees (ten fruits per mother tree) from two populations in the state of Minas Gerais (Curvelo and São Gonçalo do Rio Preto Municipalities) during the years 2010, 2011 and 2012. The data were submitted to analysis of variance using a hierarchical classification model. An analysis of clusters and main components was used for studying the divergences. The effects of the populations were not significant for all the characters analyzed in isolation. The gathering of pequi mother trees shown by multivariate analysis did not correspond to the grouping established by the populations. Selection for breeding and/or preservation purposes should concentrate efforts on fewer populations with larger numbers of mother trees per population. Selection of mother trees with higher fruits and thicker pulp fruits among them, even by visual evaluations only, is recommend in sampling mother trees for breeding purposes.
MACRONUTRIENTS IN THE Eucalyptus Dunnii Maiden ROWS SUBMITTED TO POTASSIUM FERTILIZATION IN VARIABLE CHARGE SOILS
Authors: Schneider Thays , Fonseca Adriel Ferreira da , Pontes Laíse da Silveira
Published: August 2018

ABSTRACT The contribution of nutrient cycling from eucalyptus residues in an Integrated Crop-Livestock System (ICLS) extracting potassium (K) in deeper layers and releasing on the surface should be further investigated in soils with variable charge. The objectives of this study were to evaluate the effects of K rates (0, 100, 200 and 300 kg ha-1 yr-1 of K2O) applied on the soil surface in the entire area in rows of ICLS with eucalyptus, and relate these doses to macronutrient levels in the soil. The implemented experimental design was a randomized complete block using a split plot with three replications. The plot consisted of two rows and subplot by K rates. Soil fertility attributes were conducted at 6, 12 and 30 months after the start of the experiment. Medium to high concentrations of K were observed in profile up to 12 months, and very low concentrations of K were observed in the profile 30 months after the experiment was initiated. High concentrations of Ca, Mg were observed throughout the profile favoring saturation in an effective cation exchange capacity (ECEC). However, high K saturation in ECEC was observed at 6 and 12 months, and this decreased at 30 months of study. No leaching was observed, although acidity was high.
CHARACTERISTICS FOR THE SELECTION OF PARENTS OF Corymbia citriodora AIMING TO THE PRODUCTION OF WOOD AND ESSENTIAL OIL
Authors: Luz Otávio dos Santos Limeira , Honório Ana Beatriz Marques , Fidelis Rodrigo Ribeiro , Nascimento Ildon Rodrigues do , Moraes Cristiano Bueno de , Leal Tarcísio Castro Alves de Barros
Published: August 2018

ABSTRACT This study aimed to identify the most important characteristics for the selection of parent trees of Corymbia citriodora by estimating genetic dissimilarity and linear correlation degree for wood and essential oil production. This study was conducted in experimental areas of the company JAMP Florestal -located in Dueré-TO -and at Universidade Federal do Tocantins (Federal University of Tocantins), campus Gurupi, from January to April 2014, in 19 parent trees based on 19 characteristics. With the data, the following steps were performed: clustering through Tocher’s optimization method; calculation of genetic dissimilarity between parents; quantification of relative contribution; and verification of correlation degree existing among the characteristics evaluated through Pearson correlation using the program GENES. The characteristics essential oil yield and heartwood diameter presented the major contributions for genetic dissimilarity. Thus, it must be prioritized for wood production: trees with lower values in crown height and sapwood diameter; and trees with higher values in total height, commercial height, diameter at breast height and stump diameter. For essential oil production, it must be prioritized trees with lower values in leaf width, bark thickness and sapwood diameter; and trees with higher values in leaf nitrogen content, leaf potassium content, total green biomass and total dry biomass, essential oil yield, essential oil content and crown volume.
ECOPHYSIOLOGICAL ANALYSIS OF Eucalyptus camaldulensis (DEHNH) SUBMITTED TO ATTACK FROM Thaumastocoris peregrinus (CARPINTERO & DELLAPE)
Authors: Almeida Kamilla Emmanuelle Carvalho de , Silva Junia Grazielle Soares da , Silva Inaê Mariê de Araujo , Costa Alisson Lucrecio da , Laia Marcelo Luiz de
Published: August 2018

ABSTRACT Works correlating the effect of a bronze bug attack on ecophysiological aspects of eucalyptus can be used in selection programs for resistant genetic materials. The objective of this study was to evaluate the injuries caused by Thaumastocoris peregrinus (Carpintero & Dellape) through the ecophysiological analysis of Eucalyptus camaldulensis (Dehnh). The experiment was conducted in a completely randomized design, with two groups of plants, infested and non-infested, kept in a room at 25 ± 2 °C, relative humidity 60 ± 2% and a photoperiod of 12 hours. For 26 days, every 48 hours, the chlorophyll a fluorescence, using the electron transport rate (ETR) and the potential quantum efficiency (Fv/Fm), was measured, in addition to the leaf chlorophyll content of the plants. The variables observed were analyzed in relation to treatments and times using a mixed linear model, with plants and leaves being random effects. Plants protected from insect attack showed better results over the experimental period. However, the attack from the bronze bug negatively affected all the ecophysiological variables evaluated in E. camaldulensis, indicating a possible compromise of the photosynthetic apparatus of the plants.
Biomechanical effect of inclined implants in fixed prosthesis: strain and stress analysis
Authors: RODRIGUES Vinícius Anéas , TRIBST João Paulo Mendes , SANTIS Leandro Ruivo , BORGES Alexandre Luiz Souto , NISHIOKA Renato Sussumu
Published: August 2018

Abstract Introduction Implant inclinations can be corrected using mini abutments at different angulations. Objective To analyze the influence of external hexagon implants in different inclinations (3 levels) on the microstrain distribution generated around three implants. Method A geometric bone model was created through Rhinoceros CAD software (version 5.0 SR8, Mcneel North America, Seattle, WA, USA). Three implants (4.1 × 13 mm) were modeled and inserted inside the substrate at three different inclinations: 0º, 17º and 30º. Next, all groups received mini conical abutments, fixation screws and a simplified prosthesis. The final geometry was exported in STEP format to analysis software and all materials were considered homogeneous, isotropic and linearly elastic. An axial load (300N) was applied on the center of the prosthesis. An in vitro study was conducted with same conditions and groups for validating the tridimentional model. Result Stress was concentrated on the external area of the implants, in contact with the cortical bone and external hexagon. For the bone simulator, the strain increased in the peri-implant region according to the increase in the implant’s inclination. The difference between groups was significant (p = 0.000). The 30º group presented higher stress and strain concentration. Conclusion The microstrain and stress increase around implants directly proportional to the increase of the installation angle.
Evaluation of calcium release and pH value of light-cured cavity liners for pulp-capping materials
Authors: PEREIRA Kamila de Figueiredo , CRUVINEL Rosymere Freitas de Sousa , DANTAS Andrea Abi Rached , KUGA Milton Carlos
Published: August 2018

Abstract Introduction Cavity liners based calcium hydroxide present low strength and high solubility that is consider a disadvantage. In order to enhance these properties it was developed a light-cured cavity liner based calcium hydroxide containing resin. Objective The purpose of this study was to evaluate the pH and calcium release of light-cured cavity liners. Material and method There were prepared specimens (n=10) with the Ultra-Blend ® plus, Biocal® (light cured cements) and Hydro C® (control). The samples were stored in 10 mL of distilled water and maintained at 37 °C. After 24 hours, 7, and 14 days, there were analyzed pH and the release of calcium levels. The data were statistically analyzed by ANOVA and Tukey test (α = 0.05). Result The results of pH showed Hydro C > Ultra-Blend plus > Biocal. Biocal presented worst calcium release. Conclusion Light-cured materials present lower calcium release and alteration in pH values.
AFIRMANDO UM ÉTHOS DE PESQUISADOR EM SAÚDE: PROCESSOS PARTICIPATIVOS DE RESTITUIÇÃO DE RESULTADOS DE PESQUISAS
Authors: Ferreira Joseane Pessanha , Silva Claudia Osorio da , Barros Maria Elizabeth Barros de , Rotenberg Lúcia
Published: August 2018

Resumo Este estudo procurou abrir discussão metodológica nas pesquisas em saúde a partir de mal-estar provocado por diretriz dominante, para a qual há uma realidade pronta a ser desvendada, cabendo ao pesquisador acessá-la. Descrevemos um cultivo do processo investigativo por meio da devolutiva de resultados de pesquisa epidemiológica em hospitais públicos no Rio de Janeiro, entre 2010 e 2013. A devolutiva privilegiou o diálogo com trabalhadores da enfermagem segundo o conceito de restituição da análise institucional. Realizamos grupos de discussão de resultados e encontros de saúde do trabalhador de enfermagem, reunindo gestores e trabalhadores na pactuação de ações no campo da saúde do trabalhador. A participação desses atores transformou modos de pesquisar-intervir, considerando que práticas em saúde se fazem no encontro entre sujeitos. Mediante ferramentas comumente usadas para informação dos resultados, caminhamos da devolução meramente informativa à restituição participativa. Ao forjar de forma coletiva o processo de restituição, tensionamos pesquisas que tomam de forma dicotômica relações pesquisador-pesquisado, entendendo que metodologias e instrumentos surgem num processo de coengendramento. Tratou-se de transformar preocupações éticas dos pesquisadores em saúde em um éthos de pesquisador em saúde, segundo entendimento de que a pesquisa acontece no coletivo, que inclui pesquisadores e pesquisados na produção de um comum.
DETERMINAÇÃO OU DETERMINANTES SOCIAIS DA SAÚDE: TEXTO E CONTEXTO NA AMÉRICA LATINA
Authors: Borghi Carolina Michelin Sanches de Oliveira , Oliveira Rosely Magalhães de , Sevalho Gil
Published: August 2018

Resumo Determinação social da saúde e determinantes sociais da saúde têm se apresentado como sinônimos em um contexto de retomada do tema. A concepção de determinação e determinantes e a historicidade desses modelos teóricos transcende o plano acadêmico, ao se considerar a particularidade envolvendo saúde pública, saúde coletiva e medicina social, em que ciência e política se relacionam estreitamente. Ao se delinearem diferenças entre essas denominações, procura-se neste ensaio recuperar, no plano teórico, a elaboração de determinação social da saúde, destacando sua relação com o conhecimento produzido na América Latina e sua repercussão no Brasil, bem como as influências dos paradigmas científicos, epistemológicos, arcabouços teóricos e projetos em disputa nesse campo. Para abranger dimensões políticas e acadêmicas que os modelos teóricos comportam, recorremos ao auxílio de autores que transitam entre diferentes campos de conhecimento. Sem a pretensão de esgotar todos os possíveis pontos de contemplação que nossa incursão proporcionou, apresentamos uma síntese de nossa concepção do modelo teórico de determinantes sociais da saúde e sobretudo de determinação social da saúde, que propomos desmembrar em duas categorias, determinação estrutural e determinação estrutural-relacional, para, ao enfatizar epistemologicamente a complexidade, permitir melhor contemplação de avanços teóricos e metodológicos.
NÚCLEO DE APOIO À SAÚDE DA FAMÍLIA E TRABALHO INTERPROFISSIONAL: A EXPERIÊNCIA DO MUNICÍPIO DE CAMPINAS (SP)
Authors: Castro Cristiane Pereira de , Nigro Daniele Sacardo , Campos Gastão Wagner de Sousa
Published: August 2018

Resumo Este estudo buscou compreender a dinâmica do processo de institucionalização do único Núcleo de Apoio à Saúde da Família implantado em Campinas, São Paulo. Embora seja município precursor da prática de apoio matricial, nele a implantação do Núcleo ocorre em ritmo lento, sendo relevante identificar fatores relacionados à inexpressiva presença deste arranjo organizacional, assim como analisar suas práticas. Optou-se pelo emprego do estudo de caso único, e para a produção de material empírico utilizou-se a observação participante e grupos focais. Os dados foram agrupados em dois eixos: a ‘história feita’, focalizando o contexto das políticas de saúde municipais; a ‘história se fazendo’, que remete à compreensão das percepções dos participantes daquela história. Observou-se que a experiência do Núcleo de Apoio à Saúde da Família estudado apresenta potencialidades e tensões. A metodologia do apoio matricial fundamenta a atuação da equipe e favorece o vínculo com a atenção básica, o desenvolvimento de uma relação interprofissional interativa, pautada no intercâmbio de conhecimentos e fortalecimento do trabalho em rede. Entretanto, as dificuldades para a ampliação desses núcleos como arranjo organizacional prioritário indicam a permanência de tensões que remetem ao histórico de conformação das práticas de matriciamento, pautadas em equipes autônomas e organizadas por áreas temáticas.
EXPLORAÇÃO E SOFRIMENTO MENTAL DE PROFESSORES: UM ESTUDO NA REDE ESTADUAL DE ENSINO DO PARANÁ
Authors: Albuquerque Guilherme Souza Cavalcanti de , Lira Lucas Nathã Almeida , Santos Junior Isaías dos , Chiochetta Ricardo Luiz , Perna Paulo de Oliveira , Silva Marcelo José de Souza e
Published: August 2018

Resumo A reestruturação do mundo do trabalho tem exercido forte impacto sobre as condições de vida e saúde da classe trabalhadora. Os professores têm sofrido, assim como os demais trabalhadores, a precarização do trabalho, entre outras consequências da acumulação flexível, com o aumento das exigências sem o incremento suficiente dos recursos necessários para o desempenho do trabalho. A intensa elevação do sofrimento mental dos docentes parece estar ligada às novas condições de trabalho. Visando a fornecer subsídios para o enfrentamento dessa questão, realizou-se pesquisa buscando verificar a associação entre a elevação da exploração no trabalho dos docentes e o sofrimento mental. Efetuou-se estudo transversal por meio da plataforma Limesurvey, em que 1.201 professores da rede estadual responderam a dois questionários on-line: o Self-Reporting Questionnaire-20 e outro, elaborado pelos pesquisadores, sobre as condições de trabalho dos docentes. Carga horária semanal, número de alunos por turma e número de turmas por professor apresentaram associação com transtornos psíquicos menores. A associação de número de alunos por turma com a presença de transtorno psíquico menor foi estatisticamente significativa. Concluiu-se que a prevalência de casos indicativos de distúrbios psíquicos é muito elevada entre os professores, havendo indícios de associação com diversas formas de exploração no trabalho docente.
A SOCIALIZAÇÃO PROFISSIONAL NO PERCURSO DE TÉCNICO A ENFERMEIRO
Authors: Ferreira Junior Antonio Rodrigues , Fontenele Matheus Eduardo Passos , Albuquerque Rosalice Araújo de Sousa , Gomes Francisco Meykel Amâncio , Rodrigues Maria Eunice Nogueira Galeno
Published: August 2018

Resumo A pesquisa analisou o processo de socialização e transformação de técnicos de enfermagem em enfermeiros por meio de um estudo do tipo exploratório descritivo, de abordagem qualitativa, com a participação de 24 técnicos de enfermagem cursando graduação em uma universidade do Ceará, Brasil. Foi realizada de setembro a outubro de 2016, por intermédio de entrevistas semiestruturadas individuais, com análise temática para organização das informações, discutidas segundo os pressupostos da sociologia das profissões. Com base nos resultados, originaram-se três categorias: motivações para ascensão profissional; dessemelhanças entre o trabalho do técnico de enfermagem e o do enfermeiro; e amadurecimento profissional no processo formativo. Percebeu-se o processo de socialização profissional na trajetória formativa de um técnico em enfermeiro, motivada pelo desejo de ascensão profissional. A transição gradativa é importante para a adaptação do técnico de enfermagem a uma nova identidade em construção, o que pode facilitar a migração entre os indivíduos com distintos níveis de complexidade na atuação da enfermagem.
AVALIAÇÃO DA APRENDIZAGEM NO ESTÁGIO SUPERVISIONADO DE ENFERMAGEM EM SAÚDE COLETIVA
Authors: Belém Jameson Moreira , Alves Maria Juscinaide Henrique , Quirino Glauberto da Silva , Maia Evanira Rodrigues , Lopes Maria do Socorro Vieira , Machado Maria de Fátima Antero Sousa
Published: August 2018

Resumo Neste ensaio teórico-reflexivo, desenvolvemos uma discussão a respeito da avaliação da aprendizagem no processo de formação da assistência de Enfermagem em Saúde Coletiva no decorrer do estágio supervisionado. Dialogamos com autores da Saúde Coletiva e da avaliação da aprendizagem por competências, principalmente da medicina, que foram pioneiros nesse debate, empregando o modelo hierárquico-conceitual de avaliação de competências proposto por George Miller. Procuramos contribuir ao apresentar possibilidades de métodos, instrumentos e procedimentos de avaliação da aprendizagem em contextos somativos ou formativos, perspectivas e tendências da avaliação do processo de ensino-aprendizagem na área da Enfermagem. Constatamos que a avaliação por competências necessita ser mais discutida para estar alinhada às mudanças curriculares em curso e às demandas de formação de perfis profissionais em consonância com as necessidades e princípios do Sistema Único de Saúde.
The collet-sicard syndrome and dentistry: case report
Authors: BRAVO Felipe , MARTORELLI Sérgio Bartolomeu de Farias , MARTORELLI Fernando de Oliveira , FONSECA Felipe Leonardo de Melo Almeida
Published: August 2018

ABSTRACT The Vernet, Collet-Sicard and Villaret Syndromes are uncommon; they affect the spaces through which some of the cranial nerves pass and can lead to the impairment of motor functions of the tongue. The etiology is variable, including benign or malignant tumors, metastasis, infections, or Idiopathic causes. Patients with the disease may report changes in the mobility and function of the tongue, dysphonia, dysarthria and dysphagia. The purpose of this article was present a case report of Collet-Sicard syndrome, and to highlight the importance of proper diagnosis by dentists. Appropriate treatment must be instituted as soon as possible and the patient should be treated by a multidisciplinary team until the complete remission of symptoms.
Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment
Authors: INOJOSA Inês de Fátima de Azevedo Jacinto , LOPES Hélio Pereira , PEREIRA Phillip Lucas Ricardo , NASCIMENTO Diogo Lopes do , ELIAS Carlos Nelson , VIEIRA Victor Talarico Leal , VIEIRA Marcia Valeria Boussada
Published: August 2018

ABSTRACT Objective: This study compared the fatigue behavior of endodontic instruments manufactured with conventional NiTi alloy electropolishing, RaCe (FKG Dentaire, LaChauxdeFonds, Switzerland), with instruments manufactured with NiTi CM Wire subjected to thermomechanical treatment, in the manufacturing process, HyFlex CM (Coltène Whaledent, Cuyahoga Falls, Ohio, USA), both with similar geometry and dimensions in order to determine the influence of the manufacturing process in the fatigue resistance. Methods: The methodoly consisted of twenty HyFlex CM and RaCe instruments with D0 0.25 mm, taper 0.06 mm / mm, 25 mm length, both with triangular cross section. The fracture resistance was evaluated by static fatigue test, using a stainless artificial canal with 5mm of radius (86°), recording the time and calculating the number of cycles until fracture occurs (NCF). For statistical analysis the Student t test was used The fractured instruments surface was analyzed by SEM. Results: The NCF was significantly higher for HyFlex CM instruments in comparison with RaCe files (P˂0.05) being 1336% more resistant to fatigue. The analysis of the fractured surface by SEM showed ductile-kind morphological characteristics for both instruments and the absence of plastic deformation. Conclusion: HyFlex CM instruments present higher values of NCF. Thus, it can be concluded that the thermal treatment to which these instruments with CM Wire alloy are submitted makes them more resistant to fracture than Race instruments manufactured with conventional NiTi alloy electropolishing.
Dentigerous cyst in the maxillary posterior region associated with an impacted deciduous molar
Authors: LACERDA Érica Passos de Medeiros , MARTORELLI Sérgio Bartolomeu de Farias , MARTORELLI Fernando de Oliveira
Published: August 2018

ABSTRACT Dentigerous cyst, ranked the second most common developmental odontogenic cyst of the jaws after the radicular cyst, is a well-defined, unilocular radiolucent lesion without symptoms, frequently noted as an incidental finding in routine radiographs. The cystic lining is derived from epithelial remanants of the tooth-forming organ and the teeth most commonly affected are impacted mandibular third molars and permanent maxillary canines. While the dentigerous cyst is not uncommon, its development as a result of an impacted deciduous tooth is rare. The aim of this article was to make a brief literature review and report a case of dentigerous cysts associated with an impacted deciduous molar in the maxillary posterior region, with involvement of the right maxillary sinus.
Matricaria Recutita Extract (Chamomile) to reduce Candida Albicans and Entrobacter Cloacae biofilms: in vitro study
Authors: PEQUENO Maitê Alves , SILVESTRE Marissa Rodrigues , AMÊNDOLA Isabela , SILVA Célia Regina Gonçalves e , LEÃO Mariella Vieira Pereira , SANTOS Silvana Soleo Ferreira dos
Published: August 2018

ABSTRACT Objective: This research study aimed at evaluating the inhibitory activity of Matricaria recutira (chamomile) hydroalcoholic extract on Candida albicans and Enterobacter cloacae biofilms. Methods: C. albicans and E. cloacae biofilms with thirty-hour formation were submitted, for five minutes, to 100, 200 and 300 mg / mL of M. recutita hydroalcoholic extract, chlorhexidine digluconate 0.12% (Periogard® - inhibition control) or sterile distilled water (growth control). Subsequently, they were washed and divided into two groups to determine the microbial viability: G/UFC - counting of colony forming units (cfu) in agar and G/DNA - quantification of viable DNA with violet crystal dye by spectrophotometry. Results: M. recutita extract at 300 mg/mL reduced significantly (p <0.01) the E. cloacae cfu/mL number in biofilm with results similar to chlorhexidine 0.12%, while extracts at 100 and 200 mg/mL did not have the same effectiveness. The amount of E. cloacae viable DNA was reduced (p <0.05) in all the M. recutita extract concentrations and chlorhexidine. There was no significant difference (p = 0.565) in the cfu/mL number or in the amount of viable DNA (p = 0.8094) in C. albicans biofilm when compared to untreated biofilm (control) or, even, between the extracts when compared to each other or to chlorhexidine 0.12%. Conclusion: 300 mg/mL M. recutita extract reduced significantly the E. cloacae biofilm but not the C. albicans, both with a similar result to chlorhexidine 0.12% (Periogar®).
Sentinel event in oral health: experience with children with up to six years of age, users of the Unified Health System
Authors: PEREIRA Nora Nei Reis , PAIVA Saul Martins , SÁ Eliana Maria de Oliveira , PINTO Rafaela da Silveira , LUCAS Simone Dutra
Published: August 2018

ABSTRACT Objective: The aim of this study was to find out the children’s profile identified as Sentinel Event in oral health by the Municipal Health Department of the city of Belo Horizonte, State of Minas Gerais, Brazil. Methods: A quantitative, analytical, exploratory and documentary analysis study was developed in the city of Belo Horizonte, State of Minas Gerais, Brazil, involving 545 children, age ranging from zero to six years old. Sentinel event data were collected through an electronic form created in the Unified Health System and filled out by the municipal oral health teams. Information systems of the city council were consulted. The variables studied were as follows: Health Vulnerability Index, race/color, age, sex, to be beneficiary of the Bolsa Família Program (a social program sponsored by the government), to be monitored by the Strategy of the Family Health Program, to reside in the Belo Horizonte Citizenship Program area, nature of the school and region of residence. Statistical analysis was performed in the SPSS software, 20th version. Results: The results showed that the majority of children live in areas of medium and high social risk, they are five to six years old, male, dark-skinned, do not benefit from the Bolsa Família program, are not under the Strategy of the Family Health Program, do not reside in the territory of the Belo Horizonte Citizenship Program, and study in institutions of the municipal education network. The sentinel event is present in the nine regions of Belo Horizonte, with a higher prevalence in the regions of Venda Nova, Northeast, West, East and Barreiro. Conclusion: The study demonstrates the crucial importance of comprehensive social policies in order to influence oral health.
Microleakage analysis of dental caries lesions sealed with flow resin and compared to microhybrid resin restorations in dentin
Authors: VASCONCELOS Amanda de Albuquerque , REIS Juliana Tietbohl de Almeida , MOURA Bianca Fiorentin , GIRÃO Daniela Cavalcante , IMPARATO José Carlos Pettorossi , PINHEIRO Sérgio Luiz
Published: August 2018

ABSTRACT Objective: To evaluate the sealing of cavities of dentinal occlusal caries lesions, reproduced in vitro, with flow resin compared to cavity restorations presenting healthy dentin using microhybrid composite resin. Methods: The sample consisted of 27 healthy deciduous molars where cavities of approximately 2 mm in the fossa region were performed and occlusal cleft of each tooth were sealed, impermeabilization was performed and the sample was randomly divided into 2 groups: group I underwent cariogenic challenge and occlusal sealing with resin flow. The teeth of group II were restored with microhybrid composite resin. The teeth were immersed in 5% methylene blue for 8 hours at 37° C and washed until all the dye was removed from the surface. The teeth were sectioned in the mesio-distal direction. The penetration of the dye was evaluated: 0- no penetration; 1- dye penetration up to 1/3 of the restoration; 2- dye penetration up to 2/3 of the restoration depth; 3 - penetration of dye into the pulp wall. The results were analyzed by the Biostat 4.0 program. Descriptive analysis and the mode among the examiners submitted to the Mann-Whitney test. Results: There was no significant difference in microleakage between restoration performed in healthy dentin with microhybrid composite resin or maintenance of infected dentin in primary teeth sealed with resin flow (p = 0.6035). Conclusion: It was concluded that the marginal infiltration of primary molars sealed with microhybrid composite resin and resin flow was not influenced by the removal -or not -of the carious tissue or the material used.
Dental trauma and oral health-related quality of life in schoolchildren from public schools of a southern Brazilian city
Authors: LUNARDELLI Abelardo Nunes , LUNARDELLI Sandra Espíndola , PEREIRA Keila Cristina Raush , XAVIER Simone Costa , MARTINS Luiz Gustavo Teixeira , TRAEBERT Eliane Azevedo , TRAEBERT Jefferson
Published: August 2018

ABSTRACT Objective: To study the impact of dental trauma on the oral health-related quality of life among Brazilian students. Methods: A cross-sectional study involving a representative sample of students of the public schools (n = 435) in a city in southern Brazil was carried out. Data on dental trauma were collected through oral examinations using the O’Brien’s criteria (1993) restricted to fractures and avulsions. The Brazilian version of the Oral Impacts on Daily Performances (OIDP) was used in order to collect data on the impact of oral health-related quality of life. Bivariate and multivariate analysis were performed through Poisson log-linear regression with robust estimator with significance levels set at p <0.05. Prevalence ratios (PR) and confidence intervals (95%) were estimated. Results: The prevalence of dental trauma was 7.2%, and it was associated with the following dimensions: performing daily activities [(PR = 3.52 (95% CI, 1.06-11.75)] (p = 0.040), and speaking [(PR = 3.67 (95% CI, 1.24-10.86)] (p = 0.019) after adjusting for sex, age, dental caries and malocclusion. Conclusion: The prevalence of dental trauma found among this population was low, but significantly associated with oral health-related quality of life.
Oral health assessment in school program health: who and how?
Authors: OLIVEIRA Erick Ely Gomes de , ARANTES Diandra Costa , NASCIMENTO Liliane Silva do , PONTES Flávia Sirotheau Correa
Published: August 2018

ABSTRACT Oral health is a constitutional right, with its own national policy which guides the relevance of its interrelation to general health within the integrality principles. This manuscript aims at understanding how oral health assessment and actions are observed within the School Program Health, through a qualitative study performed in the city of Belém, State of Pará, Brazil. The sample criterion consisted of 5 nurses, 5 teachers and 5 parents. A semi-structured script was used, written and transcribed with subsequent thematic analysis. The analysis revealed three thematic categories emphasizing the need for policy empowerment and practice in order to understand the meanings of oral health within the SHP as well as to enlarge its specificity in the interdisciplinary work scenario. Thus, it is clear that for the effective functioning of the school / health relationship, it is of utmost importance that SHP policy is applied and recognized while continuously seeking to strengthen the principle of integrality and extended clinic. The study also highlights permanent education and constant need for the participants’ skill improvement so that both students’ health care and life quality can be fully promoted.
Oral symptoms and oral health in patients with chronic kidney disease
Authors: NASCIMENTO Maria Auxiliadora Gomes do , SOARES Maria Sueli Marques , KÜSTNER Eduardo CHIMENOS , DUTRA Dasaiev Monteiro , CAVALCANTI Raquel Lopes
Published: August 2018

ABSTRACT Objective: Chronic kidney disease is characterized by progressive and irreversible loss of kidney function. The impact of this disease on oral health also presents controversial results. The aim of the study was to determine oral health conditions and oral symptoms of patients with Chronic kidney disease undergoing hemodialysis. Methods: A cross-sectional study on a population with chronic renal failure was performed. Anamnesis and oral examination, decayed, miss and filled teeth (DMFT) index, community periodontal index, simplified oral hygiene index (OHI-S) and gingival index were conducted. Data were processed using SPSS v.s. 20.0 using descriptive statistics and Fischer’s exact test and ANOVA test (p<0.05). Results: 64.9% of all the individuals were male. The mean age was 50.7±14.8 years. 82.4% had symptoms oral while 44.6% had xerostomia and 31.1% dysgeusia. The mean DMFT was 20.49+8.68, the GI was low in 78.4% and the OHI-S was satisfactory in 73%; according to the community periodontal index, the presence of dental calculus occurred in 52.7%, periodontal pockets 41.9% and gingivitis 2.7%. There was a statistically significant association between xerostomia (p=0.017) and number of drugs consumed and between dysgeusia and OHI-S (p=0.011). Conclusion: The results suggest that oral symptoms such as dry mouth and dysgeusia, are common in Chronic kidney disease patients undergoing hemodialysis. Dental calculus and periodontal disease in Chronic kidney disease may be severe even if low amount of biofilm is present. It is important that dentists know the most prevalent oral symptoms in the patient with Chronic kidney disease, as well as knowing that the periodontal condition of this patient should be carefully supervised.
Reensamblar el patrimonio jesuítico-guaraní. El debate en Argentina a principios del siglo XX
Authors: PETROSINI ALEJO RICARDO
Published: August 2018

RESUMEN El artículo propone caracterizar al patrimonio según programas de estudio procedentes de la antropología y la arqueología, en conexión con nuevos enfoques de la historia del arte. Nociones como la agencia, la materialidad y la ontología son importantes para ensayar algunas respuestas ante ciertos dilemas del patrimonio en la Modernidad occidental: el rescate y conservación de restos materiales, como contrapunto de su destrucción y desgaste. En este sentido, es necesario plantear si las consecuencias de estas acciones se deben a la influencia exclusiva de humanos, o además, a la intervención de agentes no humanos, así como las cualidades materiales y los ambientes. La presentación deconstruye el mecanismo del patrimonio mueble, en el cual es factible el traslado de fragmentos en diversos ámbitos. Finalmente, se presenta un caso específico de Argentina: el debate en torno a la tentativa en 1900 de transportar el pórtico procedente de las Ruinas de San Ignacio Miní (en la actual Provincia de Misiones) a un paseo público de Buenos Aires.
SITUAÇÃO DE ESTUDO: O QUE VEM SENDO PUBLICADO EM EVENTOS E PERIÓDICOS DA ÁREA DE ENSINO DE CIÊNCIAS?
Authors: VIEIRA LORENA BRITO GÓES , FERNANDES GERALDO WELLINGTON ROCHA , MALDANER OTAVIO ALOISIO , MASSENA ELISA PRESTES
Published: August 2018

RESUMO: No âmbito do ensino de Ciências, a Situação de Estudo (SE) apresenta-se como proposição curricular, construída em parceria e no interior da tríade formada pelo docente universitário, o professor da escola e o licenciando. Por esses sujeitos, são elaboradas atividades estruturadas de forma contextualizada e interdisciplinar, priorizando a significação dos conceitos científicos com vistas a um novo entendimento, de maior generalidade, do contexto em estudo. Neste texto, apresenta-se um levantamento bibliográfico, do período de 2000 a 2015, tendo como fonte de dados 57 trabalhos sobre a SE e que estão publicados nos principais eventos e periódicos da área de ensino de Ciências. Os textos publicados foram analisados por meio da Análise Textual Discursiva (ATD) e constatou-se a implementação de SEs, em espaços de interação coletiva formados pelos sujeitos envolvidos na composição triádica, bem como o uso da SE como proposta de inovação curricular. Os resultados apontam para a SE como uma possibilidade para se pensara reconfiguração curricular das Ciências da Natureza segundo recomendações de documentos oficiais e de pesquisas educacionais e, por conseguinte, uma via para se repensar a formação de professores.
Entropía en la periurbanización: desigualdad en el acceso a las infraestructuras de transportes en Tonalá, México
Authors: Lara Yefer Asprilla , Pérez Mario Guadalupe González , Quevedo Fernando García de
Published: August 2018

Resumen La movilidad en las franjas periurbanas multicausalmente ha venido experimentando crecimientos alométricos, manifiestos en infraestructuras para sistemas de transporte primordialmente motorizados, las cuales se han caracterizado por evidentes transformaciones y configuraciones morfológicas que confluyen con la generación de entropía en la ciudad-sistema. Aunque esta no es exclusiva de las periferias; es aquí donde se intensifican deficiencias e insuficiencias para unos, y mejoras recalcitrantes para otros. Este trabajo revisa las condiciones físicas y de acceso a las infraestructuras para la movilidad en el sureste del municipio de Tonalá, Jalisco en México, partiendo del enfoque de los sistemas, hemos realizado un ejercicio cuasi-etnográfico auxiliado por registros fotográficos e imágenes satelitales. Los resultados sugieren que el proceso de planificación urbano-territorial en materia de transporte es inequitativo en el acceso a las infraestructuras y no está representando la fuerza neguentrópica necesaria para regular la termodinámica relacionada con el ejercicio de vivir la ciudad o en otros términos, se ha carecido de una concepción sistémica en el proceso de planificación, lo que ha originado costos y tiempos excedentes en la movilidad periurbana.
The role of C-peptide in the attenuation of outcomes of diabetic kidney disease: a systematic review and meta-analysis
Authors: Oliveira Camila Marques , Domingueti Caroline Pereira
Published: August 2018

ABSTRACT Introduction: Preclinical trials have shown that C-peptide may contribute to the treatment of diabetic kidney disease (DKD). This systematic review and meta-analysis aimed to assess the use of C-peptide in attenuating the outcomes of DKD. Methods: Searches were made on databases PubMed, Web of Science, and Scielo for in vivo clinical and preclinical trials written in English, Portuguese or Spanish that looked into the use of C-peptide in the attenuation of the outcomes of DKD. Results: Twelve papers were included in this review, one clinical and eleven preclinical trials. In the clinical trial, DKD patients given C-peptide had lower levels of albuminuria than the subjects in the control group, but glomerular filtration rates were not significantly different. The main parameters assessed in the preclinical trials were glomerular filtration rate (six trials) and albuminuria (five trials); three trials described less hyperfiltration and three reported lower levels of albuminuria in the groups offered C-peptide. The meta-analysis revealed that the animals given C-peptide had lower glomerular volumes and lower urine potassium levels than the groups not given C-peptide. Conclusion: The results of the studies included in the systematic review diverged. However, the meta-analysis showed that the animals given C-peptide had lower glomerular volumes and lower urine potassium levels.
Perioperative factors associated with delayed graft function in renal transplant patients
Authors: Freitas Milton Halyson Benevides de , Lima Luciana Cavalcanti , Couceiro Tania Cursino de Menezes , Silva Wilton Bernadino da , Andrade João Marcelo de , Freitas Marcio Handerson Benevides de
Published: August 2018

ABSTRACT Introduction: Successful renal transplant and consequent good graft function depend on a good surgical technique, an anesthetic that ensures the hemodynamic stability of the receiver, and appropriate conditions of graft and recipient. Several factors can interfere with the perfusion of the graft and compromise its viability. The objective of this study was to evaluate perioperative factors associated with delayed graft function (DGF) in renal transplantation patients. Methods: This is a historical cohort study of patients who underwent renal transplantation between 2011 and 2013. Three hundred and ten transplants were analyzed. DGF was defined as the need for dialysis during the first week post-transplant. Logistic regression with a stepwise technique was used to build statistical models. Results: Multivariate analysis revealed the following risk factor for DGF: combined anesthesia technique (OR = 3.81, 95%CI, 1.71 to 9.19), a fluid regimen < 50 mL·kg-1 (OR = 3.71, 95%CI, 1.68 to 8.61), dialysis for more than 60 months (OR = 4.77, 95%CI, 1.93 to 12.80), basiliximab (OR = 3.34, 95%CI, 1.14 to 10.48), cold ischemia time > 12 hour (OR = 5.26, 95%CI, 2.62 to 11.31), living donor (OR = 0.19, 95%CI, 0.02 to 0.65), and early diuresis (OR = 0.02, 95%CI, 0.008 to 0.059). The accuracy of this model was 92.6%, calculated using the area under the ROC curve. The incidence of DGF in the study population was 76.1%. Conclusions: Combined anesthesia technique, dialysis for more than 60 months, basiliximab, and cold ischemia time > 12 hours are risk factor for DGF, while liberal fluid regimens and kidneys from living donors are protective factors.
Cambio climático, inundaciones y “lagunas” de información. Análisis de inundaciones a través del rastreo de artículos periodísticos en el Gran La Plata (Buenos Aires, Argentina)
Authors: Rotger Daniela Vanesa , Aversa María , Jáuregui Estefanía
Published: August 2018

Resumen El escrito incorpora una metodología para el registro de inundaciones en la región Gran La Plata a partir del relevamiento en un medio periodístico local (diario El Día) en un período que abarca desde 1911 a 2014. Los principales resultados refieren al análisis de las inundaciones según tipo de evento de precipitación, las localidades afectadas y el reconocimiento de los años críticos. Esta metodología podría dar lugar a nuevas líneas de investigación y plataformas colaborativas, como aplicaciones que sirvan para alertas tempranas, prevención y mitigación; estrategias orientadas a reconocer la percepción social del riesgo.