302 research outputs found
Avaliação da eficiência do "Bt caseiro" no controle de lagartas de Helicoverpa armigera.
No full textO Bacillus thuringiensis é uma bactéria que tem sido utilizada para o controle de lagartas, principalmente da ordem Lepidoptera. Existem vários produtos a base de B. thuringiensis comercializados no Brasil, entretanto, alguns produtores têm produzido artesanalmente esta bactéria denominado de ?Bt caseiro?. A produção de bactérias entomopatogênicas não é um processo simples, requerendo fermentadores, meio de cultura com pH, oxigenação e temperaturas adequadas para a produção eficiente de esporos e sem contaminações. Desta forma, este trabalho foi conduzido para fornecer subsídios aos produtores em relação a produção de esporos de B. thuringiensis e à eficiência deste 'Bt caseiro' para o controle de lagartas.Siconbiol
Capacidade dessensibilisante do flúor durante clareamento caseiro: estudo clínica duplo cego.
No full textEste estudo teve por objetivo avaliar a capacidade dessensibilizante do flúor neutro a 0,05% e 5,00% durante clareamento caseiro com peróxido de carbamida a 10%
Capacidade dessensibilisante do flúor durante clareamento caseiro: estudo clínica duplo cego.
No full textEste estudo teve por objetivo avaliar a capacidade dessensibilizante do flúor neutro a 0,05% e 5,00% durante clareamento caseiro com peróxido de carbamida a 10%
On Jacobi quasi-Nijenhuis algebroids and Courant-Jacobi algebroid morphisms
No full textWe propose a definition of a Jacobi quasi-Nijenhuis algebroid and show that any such Jacobi algebroid has an associated quasi-Jacobi bialgebroid. Therefore, an associated Courant-Jacobi algebroid is also obtained. We introduce the notions of quasi-Jacobi bialgebroid morphism and Courant-Jacobi algebroid morphism, also providing some examples of Courant-Jacobi algebroid morphisms. (C) 2010 Elsevier B.V. All rights reserved
Application of imaging guidelines in patients with foreign body ingestion or inhalation: literature review
No full textIngestion, inhalation, and insertion of foreign bodies (FBs) are very common clinical occurrences. In any case, early diagnosis and prompt management are mandatory to avoid severe and life-threatening complications. Radiologists have an important role in revealing the presence, dimension, nature, and relationship with anatomical structures of a FB; selecting the most appropriate imaging modality; and enabling the best therapeutic choice. This review article focuses on the most frequent FBs ingested, inhaled, and inserted and presents the different tests and investigations to provide a correct radiological approach
A influência de dentifrícios com agente dessensibilizante na dor induzida por clareamento dental de consultório
No full textDissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em OdontologiaO objetivo deste estudo foi avaliar se o uso de dentifrícios dessensibilizantes antes e após as sessões de clareamento dental de consultório eliminariam ou reduziriam a sensibilidade dental. Quarenta e cinco sujeitos, divididos em três grupos, participaram deste estudo clínico duplo-cego randomizado. Quinze dias antes do clareamento de consultório os participantes foram divididos aleatoriamente em 3 diferentes grupos: Colgate Total 12 (CT), Colgate Sensitive Pro-Alívio (CS) e Sensodyne Pró-Esmalte (SP), escovando 3vezes ao dia. A escala visual analógica (EVA) foi utilizada para avaliar a sensibilidade dental após as sessões de clareamento. Duas sessões foram realizadas para cada paciente com uma semana de intervalo entre elas. Também foi aferida a mudança de cor com auxílio da escala Vitapan Classical para determinar se influenciariam na efetividade do agente de clareamento. A análise estatística utilizou os seguintes testes: Wilcoxon, Kruskal-Wallis e Mann-Whitney. Foram considerados estatisticamente significantes valores de ?=0,05. O uso dos dentifrícios não afetou a eficácia do clareamento. Para a sensibilidade dental houve diferença estatisticamente significativa entre os resultados do grupo CT e SP após a primeira sessão (p=0,048).The purpose of this study was to assess whether the use of desensitizing dentifrices prior to and after in-office tooth bleaching sessions would eliminate or reduce the tooth sensitivity. Forty-five subjects, divided in three groups, participated in this doubleblind randomized clinical trial. Fifteen days before in-office bleaching the participants were randomly divided in 3 different groups: Colgate Total 12 (CT), Colgate Sensitive Pro-Relief (CS) or Sensodyne ProNamel (SP), brushing 3times per day. Visual Analog Scale (VAS) was used to assess tooth sensitivity after in-office bleaching sessions. Two sessions were scheduled within one week between them. Also, shade change was evaluated using a VITA Classical shade guide to determine if the dentifrices had influenced in the effectiveness of the bleaching agent. The statistical analysis used the following tests: Wilcoxon, Kruskal-Wallis and Mann-Whitney. Were considered statistically significant values of á=.05. The use of desensitizing dentifrices did not affect the bleaching efficacy. For tooth sensitivity there was statistically significantly difference between the results of the Control Group and Group SP after the first session (p= .048)
Assumed natural strain NURBS-based solid-shell element for the analysis of large deformation elasto-plastic thin-shell structures
No full textIn this work, a recently proposed quadratic NURBS-based solid-shell element based on the Assumed Natural Strain (ANS) method is applied in the analysis of shell-like structures in the geometrical nonlinear regime, together with small strain plasticity. The proposed formulation is based on the additive split of the Green-Lagrange strain tensor, leading to a straightforward implementation of the nonlinear kinematics and to the introduction of a corotational coordinate system, used to integrate the constitutive law, ensuring incremental objectivity. Since the proposed approach is based on Updated Lagrangian formulation combined with a corotational coordinate system, the extension of the ANS methodology is straightforward. Well-known benchmark tests are employed to assess the performance of the proposed formulation and to establish a detailed comparison with the formulations available in the literature. The results indicate that the proposed solid-shell approach based on the NURBS ANS methodology presents good predictability characteristics in the analysis of elasto-plastic thin-shell structures subjected to large deformations
On the Assumed Natural Strain method to alleviate locking in solid-shell NURBS-based finite elements
No full textIn isogeometric analysis (IGA), the functions used to describe the CAD geometry (such as NURBS) are also employed, in an isoparametric fashion, for the approximation of the unknown fields, leading to an exact geometry representation. Since the introduction of IGA, it has been shown that the high regularity properties of the employed functions lead in many cases to superior accuracy per degree of freedom with respect to standard FEM. However, as in Lagrangian elements, NURBS-based formulations can be negatively affected by the appearance of non-physical phenomena that “lock” the solution when constrained problems are considered. In order to alleviate such locking behaviors, the Assumed Natural Strain (ANS) method proposed for Lagrangian formulations is extended to NURBS-based elements in the present work, within the context of solid-shell formulations. The performance of the proposed methodology is assessed by means of a set of numerical examples. The results allow to conclude that the employment of the ANS method to quadratic NURBS-based elements successfully alleviates non-physical phenomena such as shear and membrane locking, significantly improving the element performance
Application of imaging guidelines in patients with foreign body ingestion or inhalation: literature review
No full textIngestion, inhalation, and insertion of foreign bodies (FBs) are very common clinical occurrences. In any case, early diagnosis and prompt management are mandatory to avoid severe and life-threatening complications. Radiologists have an important role in revealing the presence, dimension, nature, and relationship with anatomical structures of a FB; selecting the most appropriate imaging modality; and enabling the best therapeutic choice. This review article focuses on the most frequent FBs ingested, inhaled, and inserted and presents the different tests and investigations to provide a correct radiological approach
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