Cyclodextrin glycosyltransferase production by the Bacillus sp., subgroup alcalophilus using a central composite design

Cyclodextrin glycosyltransferase (CGTase) activity was produced by the Bacillus sp., subgroup alcalophilus in a culture medium containing cassava starch. A central composite design and response surface methodology were used to study the influence of carbon source (cassava starch), nitrogen sources (yeast extract and tryptone) and sodium carbonate in the production medium. Assays were performed in 300 mL Erlenmeyer flasks containing 100 mL of production medium maintained in a shaker at 150 rpm at 35±1°C for 72 h of fermentation. The independent variables [0.75% cassava starch, nitrogen sources (0.375% yeast extract and 0.375% tryptone) and 1% Na2CO3] produced an enzyme activity of 96.07 U mL-1.© Academic Journals Inc.

Um novo jogo para o estudo do raciocínio combinatório e do cálculo de probabilidade

We present an educational proposal for the study of combinatorial reasoning and calculation of probabilities based on a game and problem solving methodology, aiming to support the teaching of mathematical content. A review of the literature related to the teaching and learning of the concepts of combinatorial reasoning and probability is presented. The game is original, using a board game similar to Tic-tac-toe, and the movements of its parts have some similarities, in particular those made with the rook and pawn pieces of the game of chess. We formulate various activities (problems) involving the game which, in the process of solving them, using the problem solving methodology and with the appropriate intervention of the teacher, encourage students to develop strategies for counting, an indispensable tool in the initial study of Combinatorial Analysis and Calculation of Probabilities.

Geometric modeling from the medical images in the CAD system to support prosthesis design

This paper presents an individual designing prosthesis for surgical use and proposes a methodology for such design through mathematical extrapolation of data from digital images obtained via tomography of individual patient's bones. Individually tailored prosthesis designed to fit particular patient requirements as accurately as possible should result in more successful reconstruction, enable better planning before surgery and consequently fewer complications during surgery. Fast and accurate design and manufacture of personalized prosthesis for surgical use in bone replacement or reconstruction is potentially feasible through the application and integration of several different existing technologies, which are each at different stages of maturity. Initial case study experiments have been undertaken to validate the research concepts by making dimensional comparisons between a bone and a virtual model produced using the proposed methodology and a future research directions are discussed.

Quebra de dormência em sementes de Sesbania virgata (Cav.) Pers

Forest species with hard seeds often pose considerable problems to nursery managers because their hard and impermeable seed coats hinder and delay germination. Therefore, this work aimed to determine the most efficient, practical and low cost methodology to overcome dormancy in Sesbania virgata (Cav.) Pers. Seed, a specie with potential for recovery of degraded areas. The seeds were submitted to chemical scarification by immersion in sulfuric acid during a period of 5, 10, 20 and 30 minutes, mechanical scarification and heat treatment. After the scarification the seeds were submitted to germ test in germination chambers at 25oC and photoperiod of 14 h. Treatment with mechanical scarification showed the highest germination percentage (98%), followed by chemical scarification for 30 minutes (57%). The heat treatment in spite of obtaining a higher germination percentage than the controls had abnormal development of seedlings and is not therefore recommended for seeds of S. virgata. From the parameters utilized in this study, we recommend the use of the mechanical scarification to overcome dormancy of S. virgata seeds.

Dermatóglífos de mulheres obesas brasileiras

Study design: descriptive, observational, cross-sectional. Purpose: Obesity is a complex, multifactorial disease, including genetic and endocrine factors, demographic, socioeconomic, and epidemiological changes. It affects children, adults, and elderly persons. Searching respective hereditary risk indicators is increasing, mainly by applying simple and low-cost methodology. We included thus dermatoglyphics. Objective: To investigated 30 Brazilian women dermatoglyphic profiles, 46.1 ± 07.87 years old, and body fat % equal or higher than 30%. Results: Arch predominance, low loop frequency, and high amount of IV-finger whorls were observed, as well as frequency of rare palmar pattern in 2-interdigital area. Conclusions: Data confirm the variability of dermatoglyphics frequency in different population groups, revealing that the findings meant obesity, regardless of women's different personal characteristics. Thus, additional evidences on constitutional component of obesity have been accumulated.

Automatic landslide recognition through Optimum-Path Forest

In this paper we shed light over the problem of landslide automatic recognition using supervised classification, and we also introduced the OPF classifier in this context. We employed two images acquired from Geoeye-MS satellite at March-2010 in the northwest (high steep areas) and north sides (pipeline area) covering the area of Duque de Caxias city, Rio de Janeiro State, Brazil. The landslide recognition rate has been assessed through a cross-validation with 10 runnings. In regard to the classifiers, we have used OPF against SVM with Radial Basis Function for kernel mapping and a Bayesian classifier. We can conclude that OPF, Bayes and SVM achieved high recognition rates, being OPF the fastest approach. © 2012 IEEE.

O discurso psicològico de john dewey

This work examines the discourse of the American philosopher and educator John Dewey (1859-1852) about human nature, adopting as reference the book Human nature and conduct: an introduction to Social Psychology. In this book, published in 1922, Dewey discusses fundamental concepts of Psychology - instinct, habit, intelligence, and others - and proposes a new psychological science; the author's elaborations cover the fields of philosophy, psychology and education. The methodology to analyze his discourse follows the studies developed by the Research Group Rhetoric and Argumentation in Pedagogy. Such studies are based on Chaïm Perelman's and Stephen Toulmin's theories.

Análise de proteção de linhas de transmissão através de relés numéricos e uso de models externos no ATP (Alternative Transient Program)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo de densiometria óssea de cães SRD com propriedades físicas e químicas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Produção de etanol e levana por células de Zymomonas mobilis imobilizadas em alginato

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A metodologia da problematização como uma alternativa de abordagem de ensino aprendizagem na disciplina de Didática Aplicada ao Ensino Superior do programa de pós-graduação em Odontologia Restauradora: Arco de Maguerez

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Formação contínua em serviço: um estudo com os profissionais dos centros de educação infantil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização dos resíduos do processameto de mandioca para produção de bio-etanol e sua utilização na alimentação de aves

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Metodologia para implantação e controle de coleta seletiva de resíduos sólidos industriais recicláveis

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Desidratação de abóbora (Cucurbita moschata) por métodos combinados

Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE