29 research outputs found

    Characterization and Evaluation of Filmogenic, Polymeric, and Biofilm Suspension Properties of Cassava Starch Base (Manihot esculenta Crantz) Plasticized with Polyols / Caracterização e Avaliação das Propriedades Filmogénicas, Poliméricas e de Suspensão de Biofilme da Base de Amido de Mandioca (Manihot esculenta Crantz) Plastificado com Polióis

    Get PDF
    This study investigated the gelatinization process of polymeric suspensions of cassava starch (Manihot esculenta Crantz) plasticized with glycerol or ethylene glycol and used for biofilm production. Scanning electron microscopy confirmed that the starch, used as raw material for suspensions, consists of granule-forming clods and granular aggregates. Physical parameters such as viscosity, density, and temperature can be evaluated and used to accurately characterize and identify the gelatinization point of the polyol-plasticized starch. Upon reaching the gelatinization point, the suspensions went underwent retrogradation and had a kinetic viscosity of 19 to 23.508 mPa·s for the starch–glycerol suspension and 13.56 to 16.12 mPa·s for the starch–ethylene glycol suspension. However, the density of the suspensions slightly decreased during this process, ranging from 1.01 to 0.98 g/cm3. The starch–glycerol biofilm was more malleable and resistant, while the starch–ethylene glycol biofilm was inflexible and brittle. The use of different polyols facilitated the modification of the solubilization capacity of the biofilms. The starch–glycerol biofilm had a solubility value three times higher than that of the starch–ethylene glycol biofilm. Keywords: Biofilms, starch, polyols, gelatinization, crystallinity. RESUMOEste estudo investigou o processo de gelatinização de suspensões poliméricas de amido de mandioca (Manihot esculenta Crantz) plastificado com glicerol ou etileno glicol e utilizado na produção de biofilme. A microscopia eletrônica de varredura confirmou que o amido, usado como matéria-prima para suspensões, consiste em torrões formadores de grânulos e agregados granulares. Parâmetros físicos como viscosidade, densidade e temperatura podem ser avaliados e utilizados para caracterizar e identificar com precisão o ponto de gelatinização do amido poliol plastificado. Ao atingir o ponto de gelatinização, as suspensões foram submetidas a retrogradação e tiveram uma viscosidade cinética de 19 a 23,508 mPa · s para a suspensão de amido-glicerol e 13,56 a 16,12 mPa · s para a suspensão de amido-etileno-glicol. No entanto, a densidade das suspensões diminuiu ligeiramente durante esse processo, variando de 1,01 a 0,98 g / cm3. O biofilme de amido-glicerol era mais maleável e resistente, enquanto o biofilme de amido-etileno-glicol era inflexível e quebradiço. O uso de diferentes polióis facilitou a modificação da capacidade de solubilização dos biofilmes. O biofilme de amido-glicerol apresentou um valor de solubilidade três vezes maior que o do biofilme de amido-etileno-glicol. This study investigated the gelatinization process of polymeric suspensions of cassava starch (Manihot esculenta Crantz) plasticized with glycerol or ethylene glycol and used for biofilm production. Scanning electron microscopy confirmed that the starch, used as raw material for suspensions, consists of granule-forming clods and granular aggregates. Physical parameters such as viscosity, density, and temperature can be evaluated and used to accurately characterize and identify the gelatinization point of the polyol-plasticized starch. Upon reaching the gelatinization point, the suspensions went underwent retrogradation and had a kinetic viscosity of 19 to 23.508 mPa·s for the starch–glycerol suspension and 13.56 to 16.12 mPa·s for the starch–ethylene glycol suspension. However, the density of the suspensions slightly decreased during this process, ranging from 1.01 to 0.98 g/cm3. The starch–glycerol biofilm was more malleable and resistant, while the starch–ethylene glycol biofilm was inflexible and brittle. The use of different polyols facilitated the modification of the solubilization capacity of the biofilms. The starch–glycerol biofilm had a solubility value three times higher than that of the starch–ethylene glycol biofilm.

    APINHAMENTO DENTÁRIO EM ESCOLARES DE 7 A 15 ANOS DE IDADE EM SÃO LUIS, MARANHÃO / DENTAL CROWDING IN STUDENTS FROM 7 TO 12 YEARS OF AGE IN SÃO LUÍS, MARANHÃO

    Get PDF
    Introdução: O Apinhamento Dentário (AD) é caracterizado como a discrepância entre o espaço requerido e o espaço presente no arco dentário. Estudos mostram que é o tipo de má oclusão mais presente no Brasil e no mundo. Além de proporcionar uma estética ruim, favorece o aparecimento de cárie edoenças na gengiva. Objetivo: Estimar a prevalência de AD em escolares de São Luís (MA), avaliando os fatores associados. Métodos: Estudo transversal, utilizando-se um questionário como instrumento para coleta de dados. Realizou-se documentação fotográfica padronizada nos escolares para avaliação da presença de AD. As tomadas fotográficas foram efetuadas por três examinadores previamente treinados, consistindo em fotos digitais intraorais e extraorais. Para as avaliações estatísticas, empregou-se o teste de qui-quadrado de Pearson, com nível de significância de 5%. Resultados: Dos 251 alunos avaliados, 53.25% apresentaram AD em pelo menos um dos arcos dentários, sendo mais prevalente no arco inferior (28.45%). Evidenciou-se que o AD foi mais comum entre estudantesna faixa etária de 12 a 15 anos, se comparados àqueles com idade de 6 a 11 anos (p=0,034). Para as demais variáveis, não foram observadas diferenças estatisticamente significantes na distribuição desta má oclusão. Conclusão: Conclui-se que a prevalência de AD nas dentaduras mista e permanente dos escolares examinados em São Luís (MA) foi alta, sendo mais comum no arco inferior e nas crianças/jovens entre 12 e 15 anos.Palavras-chave: Má oclusão. Prevalência. Dentição mista.AbstractIntroduction: Dental Crowding is characterized as the discrepancy between the space required and the space available in the dental arch. Studies have shown that dental crowding is the most prevalent malocclusion in Brazil and in the world. In addition to the unfavorable effect on esthetics, dental crowding favors the appearance of caries and periodontal diseases. Objective: The objective of this study was to estimate the prevalence of dental crowding in students from São Luís, MA, Brazil, by evaluating the factors associated to this condition. Methods: We developed a cross sectional study using a questionnaire as a tool for data collection. We used standardized photographic documentation in all students in order to assess the presence of dental crowding. The photos were taken by three previously trained examiners. These photos consisted of extraoral and intraoral digital photos. For statistical analysis, we used the Pearson's chi-square test, with a significance level of 5%. Results: Of the 251 students assessed, 53.25% had crowded teeth in at least one of the dental arches, being more prevalent in the lower arch (28.45%). It was noticed that dental crowding was more common among students from the age group of 12 to 15 years compared to those with 6 to 11 years (p = 0.034). For the other variables, we did not observe statistically significant differences in the distribution of this malocclusion. Conclusion: There is a high prevalence of dental crowding in mixed and permanent dentition of all the students that took part of this study, being more common on the lower arch and in kids/young people from 12 to 15 years of age.Keywords: Malocclusion. Prevalence. Mixed Dentition

    Cenários da diversidade: variedades de capitalismo e política industrial nos EUA, Alemanha, Espanha, Coreia, Argentina, México e Brasil (1998-2008)

    Full text link

    Educomunicação, Transformação Social e Desenvolvimento Sustentável

    Get PDF
    Esta publicação apresenta os principais trabalhos dos GTs do II Congresso Internacional de Comunicação e Educação nos temas Transformação social, com os artigos que abordam principalmente Educomunicação e/ou Mídia-Educação, no contexto de políticas de diversidade, inclusão e equidade; e, em Desenvolvimento Sustentável os artigos que abordam os avanços da relação comunicação/educação no contexto da educação ambiental e desenvolvimento sustentável

    ATLANTIC EPIPHYTES: a data set of vascular and non-vascular epiphyte plants and lichens from the Atlantic Forest

    Get PDF
    Epiphytes are hyper-diverse and one of the frequently undervalued life forms in plant surveys and biodiversity inventories. Epiphytes of the Atlantic Forest, one of the most endangered ecosystems in the world, have high endemism and radiated recently in the Pliocene. We aimed to (1) compile an extensive Atlantic Forest data set on vascular, non-vascular plants (including hemiepiphytes), and lichen epiphyte species occurrence and abundance; (2) describe the epiphyte distribution in the Atlantic Forest, in order to indicate future sampling efforts. Our work presents the first epiphyte data set with information on abundance and occurrence of epiphyte phorophyte species. All data compiled here come from three main sources provided by the authors: published sources (comprising peer-reviewed articles, books, and theses), unpublished data, and herbarium data. We compiled a data set composed of 2,095 species, from 89,270 holo/hemiepiphyte records, in the Atlantic Forest of Brazil, Argentina, Paraguay, and Uruguay, recorded from 1824 to early 2018. Most of the records were from qualitative data (occurrence only, 88%), well distributed throughout the Atlantic Forest. For quantitative records, the most common sampling method was individual trees (71%), followed by plot sampling (19%), and transect sampling (10%). Angiosperms (81%) were the most frequently registered group, and Bromeliaceae and Orchidaceae were the families with the greatest number of records (27,272 and 21,945, respectively). Ferns and Lycophytes presented fewer records than Angiosperms, and Polypodiaceae were the most recorded family, and more concentrated in the Southern and Southeastern regions. Data on non-vascular plants and lichens were scarce, with a few disjunct records concentrated in the Northeastern region of the Atlantic Forest. For all non-vascular plant records, Lejeuneaceae, a family of liverworts, was the most recorded family. We hope that our effort to organize scattered epiphyte data help advance the knowledge of epiphyte ecology, as well as our understanding of macroecological and biogeographical patterns in the Atlantic Forest. No copyright restrictions are associated with the data set. Please cite this Ecology Data Paper if the data are used in publication and teaching events. © 2019 The Authors. Ecology © 2019 The Ecological Society of Americ

    Vivências de cuidado por mulheres que gestam em situação de rua

    No full text
    Objective: to understand healthcare experiences from the perspective of women who are or were pregnant while in homelessness. Methods: qualitative study based on Heideggerian phenomenology adapted to the field of health. There were ten participants. The technique of phenomenological interview and a semi-structured instrument were used. The comprehensive analysis methodically followed the stages of phenomenological reduction, construction,and destruction. Results: the existence of pregnant homeless women represents difficulties, discrimination, violence, prejudice, racism,and vulnerability. It is a violation of human dignity, revealing specificities and nuances of the triad women-maternity-street. Conclusion: the research made it possible to understand that healthcare, from the perspective of women who are pregnant while homeless, offers risks both to the mother and to the child. Both the self-care and the healthcare offered by health workers and services is precarious and has weaknesses, being different from any type of care that could be understood as solicitous, zealous, and concerned.Objetivo: compreender a vivência do cuidado à saúde, na ótica de mulheres que gestam e/ou gestaram em situação de rua. Métodos: estudo qualitativo que se fundamentou à luz da fenomenologia heideggeriana, adaptada à área da saúde. Participaram dez depoentes. Aplicaram-se a técnica de entrevista fenomenológica e um instrumento semiestruturado. A análise compreensiva seguiu momentos metódicos: redução, construção e destruição fenomenológica. Resultados: o existir de mulheres que gestam em situação de rua representa dificuldades, discriminação, violência, preconceito, racismo e vulnerabilidade. Configura violação da dignidade humana, desvelando singularidades e nuances da tríade mulher-maternidade-rua. Conclusão: a pesquisa possibilitou compreender que o cuidado à saúde, na ótica das mulheres que gestam em situação de rua, oferece risco para mãe e filho. É fragilizado e precário, tanto o cuidado de si, como o realizado por profissionais e serviços de saúde, o que difere do cuidado compreendido como solicitude, zelo e preocupação

    ESTUDIO DE LA PREVALENCIA DE MORDIDA CRUZADA EN LOS PACIENTES PREORTODÓNCICOS EN SÃO LUÍS - MA.

    No full text
    El objetivo de esta investigación fue describir la mordida cruzada analizando su prevalencia y aspectosrelativos a sus modalidades, el genero, la edad, el factor etiológico, la raza y la clasificación de Angle. Lamuestra fue constituida de 623 pacientes pre - ortodóncicos de consultorios odontológicos e institucionesde enseñanza de odontología de São Luís, estado de Maranhão - Brasil, en el grupo etario de 8 a 15años. Fue realizado un análisis descriptivo de los datos los cuales fueron sometidos a la prueba del Chicuadrado.Los resultados encontrados mostraron que: a) la prevalencia de mordida cruzada fue de29,05%, la mordida cruzada anterior la más frecuente, con 12,05%; b) no hubo asociación significativade la mordida cruzada con el raza, género, edad y local de tratamiento; c) portadores de maloclusiónclase III fueron los más afectados observándose asociación significativa de la mordida cruzada con esavariable; d) el apiñamiento fue el factor etiológico más registrado. Se concluyó que la prevalencia demordida cruzada fue elevada y la procura de tratamiento parece estar más relacionada con la cuestiónestética.ABSTRACT The purpose of this research is to study crossbites, analyzing their prevalence and aspects relative tomodality, gender, age, etiologic factor, race, and Angle Classification. The sample consisted of 623preorthodontic patients from private dental offices and dental educational institutions of São Luís, thestate of Maranhão, Brazil, between the ages of 8- and 15- years-old. A descriptive analysis was carriedout and the data were submitted to the chi-square test. The results showed that: a) the prevalence ofcrossbite was 29.05%, being anterior crossbite the most frequent type, with 12.05%; b) there was no significant association of crosssbite with race, gender, age and place of treatment; c) Class IIImalocclusion patients were the most affected with crossbites, demonstrating association between thesevariables. It was concluded that the prevalence of crossbite was elevated and the demand seems to bemore related to esthetic concerns.&nbsp

    Cellulitis in a liver transplant patient as an initial manifestation of disseminated cryptococcal disease

    No full text
    Submitted by Janaína Nascimento ([email protected]) on 2019-02-14T13:07:44Z No. of bitstreams: 1 ve_Sousa_Marcos_etal_INI_2016.pdf: 738427 bytes, checksum: 8414d304d0252a1ba3065846b9ad4123 (MD5)Approved for entry into archive by Janaína Nascimento ([email protected]) on 2019-02-19T13:21:15Z (GMT) No. of bitstreams: 1 ve_Sousa_Marcos_etal_INI_2016.pdf: 738427 bytes, checksum: 8414d304d0252a1ba3065846b9ad4123 (MD5)Made available in DSpace on 2019-02-19T13:21:15Z (GMT). No. of bitstreams: 1 ve_Sousa_Marcos_etal_INI_2016.pdf: 738427 bytes, checksum: 8414d304d0252a1ba3065846b9ad4123 (MD5) Previous issue date: 2016Fundação Oswaldo Cruz. Instituto Nacional de Infectologia Evandro Chagas. Rio de Janeiro, RJ, Brasil / Universidade Estácio de Sá. Rio de Janeiro, RJ, Brasil.Santa Casa da Misericórdia do Rio de Janeiro. Instituto de Dermatologia Professor Rubem David Azulay. Rio de Janeiro, RJ, Brasl.Hospital Federal dos Servidores do Estado do Rio de Janeiro. Departamento de Doenças Infecciosas. Rio de Janeiro, RJ, Brasil.Universidade Federal Fluminense. Hospital Universitário Antônio Pedro. Departamento de Medicina Interna e Gastrohepatologia. Niterói, RJ, Brasil.Instituto Nacional de Câncer. Rio de Janeiro, RJ, Brasil.Universidade Federal do Maranhão. São Luís, MA, Brasil.Hospital Federal dos Servidores do Estado do Rio de Janeiro. Departamento de Doenças Infecciosas. Rio de Janeiro, RJ, Brasil.A 50-year-old male underwent liver transplantation due to cryptogenic cirrhosis and was admitted with severe pain in the left leg as well as phlogosis. Amoxicillin/clavulanic acid was prescribed, assuming bullous erysipelas. Among the tests performed, the latex agglutination test for the Cryptococcus sp. antigen was positive, and in both the blood culture and blister culture Cryptococcus sp. was isolated. Daily fluconazole was started. Even though liposomal amphotericin B has been started on the fifth day of hospitalization, the patient progressed to death
    corecore