Molecular Weight Distribution
Mostrando 13-24 de 360 artigos, teses e dissertações.
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13. The use of Gauss-Hermite quadrature in the determination of the molecular weight distribution of linear polymers by rheometry
The molecular weight distribution (MWD) and its parameters are of the fundamental importance in the characterization of polymers. Therefore, the development of techniques for faster MWD determination is a relevant issue. This paper aims at implementing one of the relaxation models from double reptation theory proposed in the literature and analyzing the nume
Braz. J. Chem. Eng.. Publicado em: 2013-12
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14. Treatment of dairy wastewater with a membrane bioreactor
Among the food industries, the dairy industry is considered to be the most polluting one because of the large volume of wastewater generated and its high organic load. In this study, an aerobic membrane bioreactor (MBR) was used for the treatment of wastewater from a large dairy industry and two hydraulic retention times (HRT), 6 and 8 hours, were evaluated.
Braz. J. Chem. Eng.. Publicado em: 2013-12
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15. Contenido, distribución y origen de hidrocarburos en sedimentos de tres lagunas urbanas de Concepción - Chile
Aliphatic hydrocarbon content, distribution and origin in superficial and deep sediments of three interconnected urban lagoons located in Concepción-Chile were studied. In all lagoons, the analysis showed that aliphatic hydrocarbons present were of biogenic and anthropogenic origin, and n-alkanes were predominantly from odd carbon, confirmed by a relatively
Quím. Nova. Publicado em: 2013
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16. Identificação molecular dos isolados de Giardia duodenalis em crianças procedentes dos municípios de Araguari e Uberlândia
Giardia duodenalis is a parasite of several mammalian species, including humans, with a worldwide distribution. It is associated with diarrhea and nutritional disorders, especially in children. Molecular characterization of the parasite is crucial to identify assemblages/sub-assemblages related to infection, and its association with clinical manifestations.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012
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17. Marcadores orgânicos moleculares como ferramentas no monitoramento ambiental: Avaliação da distribuição de Alquilbenzeno Lineares (LABs) em organismos e sedimentos, como indicativo de exposição ao esgoto em áreas costeiras / Organic molecular markers as tools in environmental monitoring: Evaluation of Linear Alkylbenzene (LABs) distribution in organisms and sediments, as indicative of exposure to sewage in coastal areas
The sewage disposal in coastal areas can cause impacts to marine life, altering the balance of the ecosystem and biodiversity and causing serious diseases in humans. In this study, the concentration of a set of molecular markers for the introduction of organic sewage into the marine environment: linear alkylbenzene (LAB), in samples of sediment, oysters (Cra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012
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18. Inovações na produção de hidrolisados de soja : modelagem e análise econômica de processo
Soybean and its derivatives have the desired properties for food either for humans or various animals because of its high protein content, which is associated to a good balance of amino acids. However, when the protein is hydrolyzed into smaller peptides, the nutritional value can increase further. A product with high nutritional value added but which does n
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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19. Análise de uma heme oxigenase funcional em Trypanosoma cruzi / Heme oxygenase analysis in Trypanosoma cruzi
Trypanosoma cruzi, the ethiologic agent of Chagas disease, is transmitted through triatomine vectors during their blood-meal on vertebrate host. These hematophagous insects ingest blood about 6 to 12 times its original weight, reaching in a single meal about 10 mM heme bound to hemoglobin. Heme (iron protoporphyrin IX) is an important molecule in metabolism
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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20. Mecanismos intraflagelares de transporte e trânsito de proteínas: uma abordagem pós-genômica e computacional de caracterização da virulência flagelar em Leishmania spp. / Intraflagelares mechanisms of transport and transit proteins: a post-genomics and computational characterization of virulence flagellar Leishmania spp.
Leishmania are flagellated protozoa that cause a main neglected diseasease, collectively known as leishmaniases, posing a constant challenge for the control and prevention of the disease due to the wide-world distribution and prevalence of these parasites. As an insinuating pathogen, Leishmania has a specialized organelle for motility, the flagellum, which i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/01/2011
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21. Thermo-mechanical degradation and VOC emission of unstabilized and stabilized polypropylene copolymer during multiple Extrusions
The thermo-mechanical degradation during the multi-extrusion of unstabilized and stabilized polypropylene copolymer (cPP) was analyzed using the Chain Scission Distribution Function (CSDF) method. During the first extrusion of unstabilized cPP almost 60% of the initial polymeric chains were submitted to chain scission. The calculations using CSDF show a rand
Materials Research. Publicado em: 08/11/2011
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22. Preparation of PVP hydrogel nanoparticles using lecithin vesicles
Hydrogels micro, sub-micro and nanoparticles are of great interest for drug encapsulation and delivery or as embolotherapic agents. In this work it is described the preparation of nano and sub-microparticles of pre-formed, high molecular weight and monomer free poly(N-vinyl-2-pyrrolidone) encapsulated inside the core of lecithin vesicles. The hydrogel partic
Química Nova. Publicado em: 2010
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23. Determinação de espectros de relaxação e distribuição de massa molar de polímeros lineares por reometria
A distribuição de massa molar (DMM) e seus parâmetros são de fundamental importância na caracterização dos polímeros. Por este motivo, o desenvolvimento de técnicas que permitam a determinação da DMM de forma mais rápida e a menor custo é de grande importância prática. Os principais objetivos deste trabalho foram a implementação de alguns do
Publicado em: 2010
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24. O COMPLEXO METILMERCÚRIO-CISTEÍNA ALTERA O ACÚMULO DE MERCÚRIO EM DIFERENTES TECIDOS DE CAMUNDONGO / COMPLEX METHILMERCURY CYSTEINE ALTERS MERCURY ACCUMULATION IN DIFFERENT TISSUES OF MICE
Methylmercury (MeHg) is related to several deleterious effects on the vertebrate tissues, mainly on central nervous system, and part of these effects are through of interaction with sulfhydryl group found in cellular proteins. MeHg interacts with low and high molecular weight thiols in the blood and tissues and this fact, in some cases will allow a better ab
Publicado em: 2009