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Mostrando 13-24 de 95 artigos, teses e dissertações.
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13. Production, purification and characterization of L-asparaginase from Streptomyces gulbargensis
L-asparaginase is an anti-neoplastic agent used in the lymphoblastic leukaemia chemotherapy. In the present study a novel strain, Streptomyces gulbargensis was explored for the production of extra-cellular L-asparaginase using groundnut cake extract. The optimum pH, temperature, inoculum size and agitation speed for enzyme production were pH 8.5, 40ºC, 1x10
Brazilian Journal of Microbiology. Publicado em: 2010-03
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14. Obtenção de uma porcelana dielétrica a partir de matérias-primas do Rio Grande do Norte
The dielectric porcelain is usually obtained by mixing various raw materials proportions and is used in the production of electronic equipment for various applications, from capacitors of high and low Power to insulators for low, medium, high and extra high voltage, which are used in distribution lines and transmission of electricity.This work was directed t
Publicado em: 2010
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15. Mortalidade infantil em Londrina (PR) em anos recentes : características e percepções de gestores e profissionais de saúde
Infant mortality reaches a population group of liveborn infants younger than one year of age, who are vulnerable to life conditions, both to intra and extra-uterine environments. Knowing the causes of deaths and factors associated to them may provide valuable information to health care providers for improving health care. Therefore, this study had two approa
Publicado em: 2010
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16. Desenvolvimento e validação de um modelo de crescimento de biofilmes de S. mutans e estudo do efeito da sacarose na expressão de gtfBCD e dexA em biofilmes dentais formados in vitro e in situ / Development and validation of S. mutans biofilm growth model and study of effect of sucrose on gene expression of gtfBCD and dexA in dental biofilms formed in vitro and in situ
In vitro and in situ models have been developed to study dental biofilms. Protocols, that simulate the alternations of "feast or famine" episodes that happen in oral environment in the presence of dietary carbohydrates and allowing dental caries evaluation, are necessaries. On the other hand, few studies about gene expression of dental biofilm formed in situ
Publicado em: 2010
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17. AvaliaÃÃo dos solventes diÃxido de carbono supercrÃtico e propano subcrÃtico na extraÃÃo do Ãleo de girassol / Evaluation of supercritical carbon dioxide and subcritical propane as solvents in the extraction of the sunflower oil
The extraction of oil from greasy seeds is traditionally based in the use of organic solvents. Currently the most used method is the process of extraction by n-hexane. Aiming the obtainment of vegetable oil with higher quality using clean technologies with reduction of oil contamination through solvent and minimizing the damage to the environment is that the
Publicado em: 2009
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18. ProduÃÃo na entressafra do maracujazeiro-amarelo irrigado em diferentes ambientes de cultivo. / Out-of-season production of yellow passion irrigation of crops in different environments:
This study evaluated the effect of different irrigation depths and environment out-of-season production of yellow passion. We evaluated the productivity and fruit quality of yellow passion fruit (Passiflora edulis Sims F. flavicarpa Deg.) in the period February to October of 2007 in the experimental area, Engineering Department from Federal University of Lav
Publicado em: 2009
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19. Utilização de prototipo nacional de destilador molecular para caracterização de frações pesadas de petroleo / Use of national molecular distiller prototype for characterization of heavy oil fractions
The characterization through TBP (True Boiling Point) curve is one of the most common experimental techniques for determination of petroleum properties. This curve defines the yield of petroleum products as function of their true boiling points, supplying important information on decisions of refinery process control and on the quality of the produced oil. D
Publicado em: 2009
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20. The effect of using different forms of terms extraction on its comprehensibility and representability in Portuguese textual domains / O efeito do uso de diferentes formas de extração de termos na compreensibilidade e representatividade dos termos em coleções textuais na língua portuguesa
The task of term extraction in textual domains, which is a subtask of the text pre-processing in Text Mining, can be used for many purposes in knowledge extraction processes. These terms must be carefully extracted since their quality will have a high impact in the results. In this work, the quality of these terms involves both representativity in the specif
Publicado em: 2009
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21. Compostagem de esterco de galinha: composiÃÃo quÃmica da matÃria orgÃnica e extraÃÃo de substÃncias hÃmicas / Chicken manure composting: organic matter composition and humic substances extraction
The agro-industrial activities are responsible for the generation of large amounts of organic waste, and composting is an efficient process for the treatment of such waste; humification degree is an important parameter for determining the quality of the compost produced. This study aims to evaluate the dynamics of humification of organic matter during compos
Publicado em: 2009
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22. PrÃticas alimentares em recÃm-nascidos de muito baixo peso
Feeding very low-weight infant adequately is fundamental to ensuring their survival and improving growth and development. However, a high percentage of these infants become malnourished during hospitalization in the first weeks of life. Due to the importance of this issue, which has been increasingly studied and researched by healthcare professionals, the pr
Publicado em: 2008
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23. Supplementation of BWH cows and ½ BWH ½ Jersey cows kept in tropical pasture with the isopropyl ester of methionine analog (HMBi) / Suplementação de vacas HPB e vacas 1/2 HPB 1/2 Jersey mantidas em pastagem tropical com o éster isopropílico do análogo de metionina (HMBi)
In this trial, was tested the inclusion of isopropyl ester of methionine analogue (HMBi) in the concentrate of BWH cows and ½ BWH ½ Jersey cows kept in pastures of Elephant grass, with the goal of achieving lysine: methionine ratio of 3:1 in metabolizable protein. Variables analyzed were milk production and composition. The forage mass and the nutritional
Publicado em: 2008
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24. Ironman athletes show significantly weight changes before the competition / Atletas de Ironman apresentam variação de peso significativa antes da prova
O triathlon Ironman consiste em percorrer 3,8 km de natação, 180 km de ciclismo, seguidos de 42,2 km de corrida, com duração média de doze horas. A exposição prolongada aos fatores ambientais, dos quais o calor e a umidade trazem mais dificuldade para a manutenção do equilíbrio térmico, leva a uma substancial perda hídrica pelo suor, com taxas va
Publicado em: 2008