Guia de fontes sobre académicos esquecidos e renascidos 1724-1759

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

Notas sobre os historiadores e suas fontes

The aim of this text is to discuss the different meanings attributed to notions of historical sources and documents from the nineteenth century, when history was constituted as a discipline. It is important to point out the centrality of this issue to the different conceptions about the production of knowledge in this field.

A importância da pesquisa de fontes para os estudos históricos

The importance of research sources for historical studies. In our text we try to call the attention to the fact that, concerning the sources, the most important aspect is the researcher who considers them. This consideration is a product of history, thus in each period and according to his social and political status, the researcher will conceive the sources in a particular way. Therefore, there is no single way to deal with the sources, which is unrelated to how the researcher behaves in relation to contemporary issues.

Estudos sobre o Brasil Colonial: arquivos e fontes

The information technology and the increasing interest in the American Latin studies, especially about Brazil, are the objective of these reflections. In the research about the colonial period in Brazil, a group of works, systematized and divulged by electronic means, beyond the usual sources – Portuguese, Italian and Brazilian Universities and Institutes – are from Europe and North America, and its access is facilitated by the worldwide network. Platforms and collections such as Europeana and others less known constitute important sources to the studies of this field. We will comment here some fundamentals to contribute to the subject sources of colonial Brazil.

Historiografia de espécies da família urticaceae coletadas no Brasil e depositadas nos herbários de Kew, New York e Paris

Pós-graduação em Agronomia (Horticultura) - FCA

Potencial de resíduos agroindustriais como fontes de compostos bioativos

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

Fontes potássicas na produção do pimenteiro em substrato fertirrigado

Pós-graduação em Agronomia (Horticultura) - FCA

Obtenção e caracterização de compósitos de benzoxazina/fibra de carbono

Pós-graduação em Engenharia Mecânica - FEG

Doses, fontes e épocas de aplicação de nitrogênio influenciando teores de clorofila e produtividade do trigo

To achieve high wheat yield, correct management of N fertilization and the use of high yield potential cultivars are necessary. The aim of this study was to evaluate the effects of different application rates and sources of N, applied totally at sowing or in topdressing, on grain yield and yield components of two irrigated wheat cultivars under a no-till system, grown in a Cerrado (Brazilian tropical savanna) region of low altitude. A randomized block design was used in a 5 x 3 x 2 x 2 factorial arrangement with three replications, combining five levels of N (0, 50, 100, 150, and 200 kg ha(-1)), three sources of N (Entec (R), ammonium sulfate, and urea), and two application times (at sowing, near the rows, or in topdressing) in two wheat cultivars (IAC 370 and Embrapa 21). The wheat cultivars had similar grain yields. There was no difference among the sources of N for grain yield and yield components. The N applied totally at sowing did not differ from the traditional application at sowing and in topdressing for production of irrigated wheat in no-tillage. The increase in application rates of N increased the leaf N contents and chlorophyll, plant height, and the number of ears per m(2). Grain yield of the wheat cultivars IAC 370 and Embrapa 21 increased up to the application rates of 134 and 128 kg ha(-1) of N, respectively, regardless of application time and source of N. The positive correlation between chlorophyll leaf content and grain yield in accordance with N fertilization levels indicates that N fertilization in topdressing can be recommended based on SPAD readings of leaf chlorophyll performed at 38 days after wheat plant emergence.

Crescimento e produção do maracujazeiro amarelo, sob diferentes fontes e doses de fósforo em cobertura

Brazil is the largest world producer of yellow passion fruit, a fruit crop which is exigent in nutrients, although little studied in relation to phosphorus fertilizing, fundamental on plant establishment. An experiment was carried out during the period of March/2010 to April/2011 in Remigio County, Paraiba State, Brazil, in order to evaluate the vegetative and productive attributes of yellow passion fruit plants under different sources and doses of phosphorus. Treatments were distributed in randomized blocks in tree replications and twelve plants by plot using the factorial design 2 x 5 referring the sources of superphosphate triple and superphosphate simple at levels P2O5 of 0, 12, 18, 24 and 30 g cave(-1). The following variables were recorded: stem diameter, number of productive branches, number of fruits per plant, fruit mass and fruit yield. The sources and doses of phosphorus affected growth and fruit production of yellow passion plants. The triple superphosphate is the most phosphorus efficient source for growth and fruit production of yellow passion fruit. The triple superphosphate dose which promoted the maximum yield of yellow passion fruit is 42.86 g.

Análise do potencial de micro-organismos dos gêneros Lectthophora e Cryptococcus para a produção de biocumbustíveis

A busca de novas fontes de energia tem sido estimulada pela demanda crescente do mercado e o bioetanol é uma alternativa promissora para esta questão. A produção de etanol a partir de resíduos agroindustriais lignocelulósicos está sendo pesquisada em vários laboratórios do Brasil e do exterior. Os resíduos da agroindústria são formados, em grande parte, por fibra vegetal lignocelulósica, a qual é altamente resistente à degradação, dificultando a conversão dos componentes a monossacarídeos fermentescíveis. Desta forma, a prospecção de micro-organismos que viabilizem a conversão de material lignocelulósico em etanol tem aumentado consideravelmente. Sendo assim, o estudo de micro-organismos associados às formigas cortadeiras, os quais são adaptados ao uso da biomassa lignocelulolítica, pode ser promissor para a descoberta de enzimas adequadas à degradação eficiente da fibra vegetal, podendo significar um passo adiante na produção do etanol de segunda geração. Neste trabalho analisamos a ação hidrolítica e a liberação de açúcares fermentescíveis por fungos dimórficos do gênero Lecythophora e de leveduras do gênero Cryptococcus sobre o material lignocelulósico. A metodologia empregada consistiu na inoculação das linhagens em diferentes resíduos da agroindústria, como bagaço de cana-de-açúcar, casca de café, casca de arroz e sabugo de milho triturado, seguida da quantificação dos açúcares redutores liberados, bem como da produção de enzimas hidrolíticas extracelulares, como endoamilase, exoamilase, pectinase, endoglucanase, exoglucanase e xilanase. O gênero Lecythophora mostrou-se melhor produtor enzimático quando comparado com o gênero Cryptococcus, ambos em meio suplementado com bagaço de cana-de-açúcar. Ainda, foi realizado o inóculo de culturas mistas das melhores linhagens pertencentes ao gênero Lecythophora. A produção enzimática constatada indicou o potencial das linhagens...

Desempenho agronômico do milho e do trigo em função da inoculação com azospirillum brasilense e doses e fontes de nitrogênio

Pós-graduação em Agronomia - FEIS

Avaliação dos fatores críticos para a seleção e aplicação clínica dos pinos de fibra: relato de caso cliínico

Teeth that have lost much of their coronal tooth structure need intraradical devices to achieve a desired retention of the restorative material, restoring aesthetics and function to the patient. For this purpose, various types of intracanal posts have been studied, of wich the fiber posts have been highlighted with its increasing use in the dental market. The purpose of this study was to present a clinical case of using fiberglass post. As well as critically analyze the published works and points of controversy described by different authors related to factors such as different protocols cementation, surface treatments pins, fracture toughness and compression, the possibility of microleakage, diameter and length of the pin, and the various materials used in conjunction with the intracanal retainers. Thus, we concluded that fiber posts showed as an excellent alternative for anterior teeth, since have least 2 mm of tooth remaining.

Fluoretação das águas de abastecimento público em um município com diferentes fontes de captação

Maintaining the levels of fluoride ion in public water supply within the parameters of adequacy it becomes essential so the measure carries a greater impact on caries prevention and control, without increasing the prevalence of dental fluorosis. Thus, it is necessary a rigorous control of the process, avoiding the undesired effects at levels above recommended levels, as well as avoiding levels below the recommended that do not offer the highest benefit. The aim of this study was to analyze the content of fluoride in public water supply in the city of Birigui, SP, with different sources of supply, checking if the fluoride levels are within the recommended. The samples were collected monthly from points previously established, with the knowledge of the distribution network of water and identifying the amount and location of supply sources and water treatment plant. Analyses were performed in duplicate in the period from January to December of 2009, in the laboratory - NEPESCO - of the Dental School of Araçatuba, Univ Estadual Paulista – UNESP, using an ion analyzer coupled to a specific electrode for fluoride. Of the total samples (n = 512), 44% (n = 224) had adequate levels and 56% (n = 288) inadequate levels, 10% (n = 49) lower levels and 46% (n = 239) showed levels above the recommended. There were differences in results when comparing the analysis of different sources. The fluoride concentration in the majority of the samples from deep wells was classified as inadequate not offering the desired benefit, or exposing the population to the risk of dental fluorosis.