997 resultados para Transferência electrónica intermolecular


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O presente artigo busca, através da categoria de formação sócio-espacial, associar a colonização germânica na Grande Florianópolis à gênese de circuitos produtivos voltados ao abastecimento alimentar da capital catarinense. Os circuitos regionais de Florianópolis, inicialmente baseados no tropeirismo entre o planalto e o litoral, adquirem com a colonização germânica, no século XIX, um maior volume e diversificação da produção. Com o aprofundamento da Divisão do Trabalho ao longo do século XX, o espaço agrário regional foi-se especializando na produção de alimentos com destino às áreas de concentração urbana. Estes circuitos regionais foram alterando sua configuração de acordo com as inovações do meio técnico-científico, encurtando as distâncias-tempo entre os lugares envolvidos no escoamento da produção; no entanto, os círculos de cooperação espacial pouco alteraram sua composição, onde um intermediário da localidade, detentor de capital e informação, realiza a transferência do produto se apropriando de parte da renda do produtor rural. 

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A mobilidade social no Brasil tem sido objeto de estudos de sociólogos, cientistas políticos, economistas e geógrafos, entre outros.  E essa mobilidade social está intimamente ligada à questão territorial, pois é regra comum que a mudança de status social, tanto para cima, quanto para baixo, na pirâmide social, implique em locomoção física, podendo ser do campo para a cidade, de uma cidade para outra, ou mesmo de uma unidade residencial para outra, no mesmo município. Com a intenção de contribuir na discussão da questão territorial e da mobilidade social no Brasil, propusemo-nos a analisar a trajetória dos moradores do Conjunto Residencial Santa Felicidade, em Maringá, desde sua saída de áreas irregulares da periferia urbana da cidade, no final dos anos 1970, sua transferência para um bairro distante da zona sul, conhecido na época também como Profilurb, até a atualidade, quando, na ótica da elite local, se transformaram em um problema para o desenvolvimento daquela região. Nesse tempo, através de luta árdua, seus moradores construíram suas casas e consolidaram seus vínculos de vizinhança e amizade em condições adversas. Este artigo se propõe a analisar a trajetória dessas famílias – uma espécie de “calvário” -, desde a saída de áreas irregulares na então periferia urbana da cidade, em meados dos anos 1970, sua transferência para um distante bairro da zona sul  da cidade, o Núcleo Habitacional Santa Felicidade, também conhecido no início por Profilurb, até a atualidade, quando, na visão da elite local, se transformaram em um problema para o desenvolvimento da região, ou seja, estão atrapalhando os interesses mercantis imobiliários dessa elite, que pretende abarcar esse espaço com o objetivo de satisfazer seus interesses capitalistas. Utilizamos como técnica para a construção deste trabalho o levantamento histórico/bibliográfico e fontes constituídas por pesquisas realizadas pelo Observatório das Metrópoles – Núcleo de Maringá .

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O vídeo foi produzido para o curso "Atenção e cuidado da saúde bucal da pessoa com deficiência". Orienta a transferência de paciente adulto para a cadeira odontológica.

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O vídeo foi produzido para o curso "Atenção e cuidado da saúde bucal da pessoa com deficiência". Demonstra a transferência de paciente infantil com paralisia cerebral para a cadeira odontológica.

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Apresenta condições gerais em que os recursos dos blocos de financiamento podem ser transferidos para arcar com outras despesas descritas nos planos municipais de saúde. Material produzido para utilização no curso Responsabilidades gestoras no último ano de mandato, ofertado pela Universidade Aberta do SUS (UNA-SUS).

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Sugarcane holds an important place in the Brazilian economy. Grate part of the sugarcane harvested still accomplished largely manually. Sugarcane harvesters available in Brazil use the technology to chop the cane into 200 to 300 mm billets to allow on the go cane transferring to transport, contradicting the traditional method of whole stalk sugarcane harvesting system. In order to make whole stalk mechanical harvesting system possible, one of the barriers to be expired is the mechanical removal of the straw. The design of a mechanism that accomplishes this operation depends directly on the knowledge of the mechanical properties of the sugarcane related to its resistance to compression and the forces necessary to remove the leaves from the stalk. Compression tests were conducted using the universal testing machine. For leaves removal test by friction, a special apparatus was designed to allow the registration of the normal and traction force. The sugarcane stalk can resist up to 4.9 MPa. With a normal pressure of 0.8 MPa, which correspond to a friction force of 315 N, it is possible to remove the leaves, independent of its location in the sugarcane stalk.

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The post harvest cooling and/or freezing processes for horticultural products have been carried out with the objective of removing the heat from these products, allowing them a bigger period of conservation. Therefore, the knowledge of the physical properties that involve heat transference in the fig fruit Roxo de Valinhos is useful for calculating projects and systems of food engineering in general, as well as, for using in equations of thermodynamic mathematical models. The values of conductivity and thermal diffusivity of the whole fig fruit-rami index were determined, and from these values it was determined the value of the specific heat. For these determination it was used the transient method of the Line Heat Source. The results shown that the fig fruit has a thermal conductivity of 0.52 W m-1°C, thermal diffusivity of 1.56 x 10-7 m² s-1, pulp density of 815.6 kg m-3 and specific heat of 4.07 kJ kg-1 °C.

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This work approaches the forced air cooling of strawberry by numerical simulation. The mathematical model that was used describes the process of heat transfer, based on the Fourier's law, in spherical coordinates and simplified to describe the one-dimensional process. For the resolution of the equation expressed for the mathematical model, an algorithm was developed based on the explicit scheme of the numerical method of the finite differences and implemented in the scientific computation program MATLAB 6.1. The validation of the mathematical model was made by the comparison between theoretical and experimental data, where strawberries had been cooled with forced air. The results showed to be possible the determination of the convective heat transfer coefficient by fitting the numerical and experimental data. The methodology of the numerical simulations was showed like a promising tool in the support of the decision to use or to develop equipment in the area of cooling process with forced air of spherical fruits.

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Tomatoes are one of the most important vegetable crops grown in Brazil and are among the crops that have one of the highest post-harvest losses indexes in the country. The present work aimed at evaluating impact damage observed in packing lines of fresh tomatoes as well as to determine, under laboratory conditions, quality alterations of tomato fruits submitted to impact damage in different surface types. Critical points evaluation was accomplished using an instrumented sphere. Critical transference points found showed variations in acceleration levels from 30 to 129 G (m s-2). Tests carried out under laboratory conditions showed that padded surfaces reduced up to 31% impact damage. Incidence of severe internal physical damage was evaluated by a subjective scale and increased by 79% on hard surfaces for the highest fall drop. On the other hand, it was observed an effective reduction in physical damage on fruits when padded surfaces were used. When a 10-cm drop was performed, the maximum reduction measured was 10% for hard surfaces and 5% for previously padded surfaces. For quality parameters, it was observed for high drops on hard surfaces, highest values for weight loss, total acidity, lower values for vitamin C and Soluble Solids.

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Excessive and inadequate handling of fruits and vegetables provides high incidences of physical damage, consequently, post harvest losses. The main goal of this work was to evaluate the impact magnitude in persimmon packing lines, Rama Forte, and to determine, at the laboratory, its impact limits. For evaluating the critical points it was used an instrumented sphere of 76 mm of diameter (Technmark, Inc, Lansing, USA), which registered the impact magnitude in seven distinctive impact lines located in four packing houses. For determining physical damages, tests were carried out at the laboratory, where fruit drop was related to impact magnitude, physical damage incidence and fruit post harvest losses. At the packing lines, the values found varied from 21 to 87 G on the transfer points and the majority of registered impacts (over 94%) were down 50G. Drops from 20 cm caused an increase in weight losses after six days of storage at room temperature. Drops from 20 and 30 cm caused skin darkness (low L values), associated to a decrease in color intensity (chroma). Impact drop did not affect pulp fruit chemical features.

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This article analyzes food insecurity and hunger in Brazilian families with children under five years of age. This was a nationally representative cross-sectional study using data from the National Demographic and Health Survey on Women and Children (PNDS-2006), in which the outcome variable was moderate to severe food insecurity, measured by the Brazilian Food Insecurity Scale (EBIA). Prevalence estimates and prevalence ratios were generated with 95% confidence intervals. The results showed a high prevalence of moderate to severe food insecurity, concentrated in the North and Northeast regions (30.7%), in economic classes D and E (34%), and in beneficiaries of conditional cash transfer programs (36.5%). Multivariate analysis showed that the socioeconomic relative risks (beneficiaries of conditional cash transfers), regional relative risks (North and Northeast regions), and economic relative risks (classes D and E) were 1.8, 2.0 and 2.4, respectively. Aggregation of the three risks showed 48% of families with moderate to severe food insecurity, meaning that adults and children were going hungry during the three months preceding the survey.

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Cecropia glaziovii is a tree with used in Brazilian popular medicine. Methods allowing the clonal propagation of this species are of great interest for superior genotype multiplication and perpetuation. For this reason, we examined the effect of different culture media and different types of explants on adventitious shoot regeneration from callus and buds of C. glaziovii. Leaves, petioles and stipules obtained from aseptically grown seedlings or from pre-sterilized plants were used to initiate cultures. Adventitious shoot regeneration was achieved when apical and axillary buds were inoculated on gelled Murashige & Skoog (MS) medium supplemented with 6-benzylaminopurine alone (BAP) (1.0, 5.0 or 10.0 mg L-1) or combined with -naphthalene acetic acid (NAA) (1.0 or 2.0 mg L-1), after 40 days of culture. Best callus production was obtained after 30 days of petioles' culture on gelled MS medium with 2,4 dichlorophenoxyacetic acid (2,4-D) (5.0 mg L-1) combined with BAP (1.0 mg L-1). Successful shoot regeneration from callus was achieved when MS medium supplemented with zeatin (ZEA) (0.1 mg L-1) alone or combined with 2,4-D (1.0 or 5.0 mg L-1) was inoculated with friable callus obtained from petioles. All shoots were rooted by inoculation on MS medium supplemented with indole-3-acetic acid (IAA) (1.0 mg L-1). Rooted plants transferred to potting soil were successfully established. All in vitro regenerated plantlets showed to be normal, without morphological variations, being also identical to the source plant. Our study has shown that C. glaziovii can be propagated by tissue culture methods, allowing large scale multiplication of superior plants for pharmacological purposes.

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Deficiency of the enzyme P450 oxidoreductase is a rare form of congenital adrenal hyperplasia with characteristics of combined and partial impairments in steroidogenic enzyme activities, as P450 oxidoreductase transfers electrons to CYP21A2, CYP17A1, and CYP19A1. It results in disorders of sex development and skeletal malformations similar to Antley-Bixley syndrome. We report the case of a 9-year-old girl who was born with virilized genitalia (Prader stage V), absence of palpable gonads, 46,XX karyotype, and hypergonadotropic hypogonadism. During the first year of life, ovarian cyst, partial adrenal insufficiency, and osteoarticular changes, such as mild craniosynostosis, carpal and tarsal synostosis, and limited forearm pronosupination were observed. Her mother presented severe virilization during pregnancy. The molecular analysis of P450 oxidoreductase gene revealed compound heterozygosis for the nonsense p.Arg223*, and the novel missense p.Met408Lys, inherited from the father and the mother, respectively. Arq Bras Endocrinol Metab. 2012;56(8):578-85