3122242 documents found, page 8355 of 312225
Síntese e caracterização de géis da reação álcali-sílica em condições aceleradas
Almeida, Thiago da SilvaIn the concrete pathology area several mechanisms are responsible for submitting cracking frames. Either by mechanical electrochemical or geochemical phenomena, the appearance of cracks is quite common in many structures. However among the various processes that can lead to excessive cracking we highlight the corrosion of armor, the attack by intrinsic or extrinsic sulfate (ettringite). The alkali-aggregate rea...
Caracterização e estudo antimicrobiano in vitro de micro e nanofibras de PLA/PV...
Batista, Roberta Ferreti Bonan DantasPolymeric nanostructures can be produced by various techniques, including solution blow spinning (SBS), which can be used to produce micro and nanofibers at lower cost compared to other techniques. One of the most commonly used polymers for this purpose is poly (lactic acid) PLA, due to its biodegradability and biocompatibility. However, because of their hydrophobicity, lower degradation rate compared with othe...
Microestrutura e propriedades elétricas de compósitos NiO/Ni-GDC para aplicação...
Araújo, Allan Jedson Menezes deThe aim of this work was to study the electrical properties of NiO/Ni-Ce0.9Gd0.1O1.95 (NiO/Ni-GDC) composites, usually used as anode materials for Solid Oxide Fuel Cells. NiO-GDC composites were obtained by a one-step synthesis route which are characterized by simultaneously obtaining the NiO and GDC phases in a single polymeric precursor. A resulting resin was heat treated at 350 ºC and the precursor powder wa...
Fertilidade do solo, nutrição, fisiologia e produção do maracujazeiro amarelo s...
Medeiros, Sherly Aparecida da SilvaYellow passion fruit is a crop of socioeconomic importance in the medium and small properties of the Serra da Ibiapaba. The cultivation of the fruit in this region is usually performed in soils of low fertility, especially in phosphorus, that also goes under water limitation for irrigation. Based on that, the objective of this study was to evaluate the soil fertility and the vegetative growth of yellow passion ...
Balanço do nitrogênio e sugestão de adubação nitrogenada para o milho cultivado...
Silva, Helton de SouzaNitrogen is the nutrient required in higher quantities by the plants, however, it presents a complex dynamic in the soil-plant system, which result in high losses and low recovery by the plants. Therefore, nitrogen fertilization has to be done in a cautious way in order to minimize losses and maximize productivity. The objectives of this study were: a) to determine the yield of corn submitted to nitrogen fertil...
Eficiência do boro sobre o crescimento, composição mineral e variáveis fisiológ...
Alexandre, Patricia da SilvaBoron deficiency in citrus limits the growth of leaves and roots, due to the interruption of cell division. Moreover, the toxicity of boron decreases the plant growth, increasing the period of formation of seedlings and loss of quality. In this sense, the aim of this experimente was to evaluate the effect of borated fertilization on growth, mineral composition and physiological variables in citrus seedlings. In...
Expressão gênica de transportadores de nutrientes e interleucinas no intestino ...
Andrade, Maria de Fátima de SouzaThe presente study assessed the effects of threonine supplementation in ovo on the intestinal genic expression of chicks inoculated with Salmonella Enteritidis at 2 days of age. Glucose, peptide and amino acid transporter data are shown in Chapter II and cecum interleukin expression (IL-1β, IL-8, IL-17 and IL-22) data are shown in Chapter III. Threonine in ovo increased the expression of Glut2 and ASCT1 at hact...
Gestão jurídico-estratégica do cibercrime no contexto da ciberdemocracia
Aguiar, Poliana Policarpo de MagalhãesInside the context of a globalized and technological modern society, new possibilities for communication and access to knowledge rises autonomously, through connections and shared knowledge, constructing identity, especially in the political and cultural fields characterizing the cyber democracy. However, the interconnection of computers and systems, combined with computer dependency of numerous sectors, will l...
Prospecção e uso de culturas lácticas como inoculante na ensilagem de palma for...
Pereira, Gildenia AraújoThis study involved two experiments. In the first, the objective was to select strains of lactic acid bacteria (BAL) isolated from the plant and cactus pear silage and to evaluate its effects on silage fermentation and aerobic stability. Forty isolates classified as BAL were isolated from the plant and forage palm silage and evaluated for the production of metabolites and identified by 16S rDNA sequencing. Isol...
Rizóbios isolados de fabáceas forrageiras do semiárido: biodiversidade e eficiê...
Dias, Suelane de MeloBiological nitrogen fixation is a natural process that occurs in associations of plants with diazotrophic bacteria. Most of the fodder fabaceae found in the Caatinga have high economic value and can be used to increase the nitrogen and organic matter input in the soil through biological nitrogen fixation and nutrient cycling. Thus the objective of this work was to characterize morphophysiologically isolated of ...