Aeration Conditions
Mostrando 25-36 de 233 artigos, teses e dissertações.
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25. Estudos preliminares de produção de ácido glucônico a partir de sacarose invertida em biorreator airlift
The use of sucrose for the production of industrial inputs with higher added value has a great industrial interest, especially glucose and fructose which present many advantages over sucrose in industrial processes. Gluconic acid and its derived salts can be mentioned as second generation products also having wide industrial applicability. This study aimed t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2011
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26. Efeitos do tratamento ácido no inóculo sobre a produção e massa molar do ácido hialurônico / Effects of the acid stress in the inoculum on the production and molecular weight of hyaluronic acid
Hyaluronic acid (HA) is a polysaccharide composed of 2000-25000 disaccaridic units of glucuronic acid and N-acetylglucosamine ?-bonds formed by 1-3 and 1-4 ?-turn. Due its physicochemical properties such as lubricity, hydrophilic and biocompatible, HA has been widely applied in the medical field. Many Studies show that production of HA by fermentation microb
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/10/2011
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27. Identificação molecular e produção de pectinases por isolados de Cladosporium cladosporioides (Fres.) de Vries / Molecular identification and production pectinase by isolates Cladosporium cladosporioides (Fres.) de Vries
The enzymes market has grown considerably in recent years. These enzymes play an important role in various industries, mainly in the food industry. Special attention has been given to the search for alternatives that reduce production costs and developing processes that will not harm the environment. Disposal of waste is a major problem faced by many agribus
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2011
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28. Nitrificação e desnitrificação simultânea em reator com biomassa em suspensão e fluxo contínuo de esgoto / Simultaneous nitrification and denitrification in reactor with biomass in suspension and continuous flow of sewage
It was developed in Europe the process known as Simultaneous Nitrification and Denitrification (SND) in activated sludge that operates with a SRT, high enough for nitrification to occur, even with low concentration of dissolved oxygen in the aeration tanks. Such situation in the tanks is possible to maintain anoxic conditions inside the flocs and to have the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2011
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29. AvaliaÃÃo da Piscicultura em Esgoto DomÃstico Tratado: Aspectos ZootÃcnicos, Ambientais e de Qualidade do Pescado Produzido / Evaluation of treated domestic sewage in fish: aspects of husbandry, environmental and quality of fish produced.
The use of wastewater is an alternative widespread nowadays. One way to reuse it in fish activity, considering that the effluent from Sewage Treatment Stations, are rich sources of nutrients that could be used by fish. However, some restrictions arise regarding the quality of animals for use in human diet. Thus, this research was conducted using treated sewa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
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30. Xylanase production by Aspergillus awamori under solid state fermentation conditions on tomato pomace
In this work, tomato pomace, a waste abundantly available in the Mediterranean and other temperate climates agro-food industries, has been used as raw material for the production of some hydrolytic enzymes, including xylanase, exo-polygalacturonase (exo-PG), cellulase (CMCase) and α-amylase. The principal step of the process is the solid state fermentation
Braz. J. Microbiol.. Publicado em: 2011-12
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31. Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain
A local yeast isolate named A was isolated from polluted area of Abou-Qir gulf (Alexandria, Egypt), identified according to a partial sequence of 18sRNA as Candida tropicalis. The isolate showed a high potency in petroleum oil biodegradation as well some hydrocarbons. Morphological changes in cell diameter of this yeast were recognized upon growing the targe
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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32. Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions
The aim of this work was to study the production of functional protein in yeast culture. The cells of Saccharomyces cerevisiae Embrapa 1B (K+R+) killed a strain of Saccharomyces cerevisiae Embrapa 26B (K-R-)in grape must and YEPD media. The lethal effect of toxin-containing supernatant and the effect of aeration upon functional killer production and the corr
Brazilian Archives of Biology and Technology. Publicado em: 2011-06
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33. Production and characterization of endo-polygalacturonase from Aspergillus niger in solid-state fermentation in double-surface bioreactor
Endo-polygalacturonase (endo-PG) production by Aspergillus niger T0005/007-2 in solid medium with 170 mm of height was evaluated in a cylindrical double surface bioreactor in 96-h experiments. Cell concentration close to 92 mg.g -¹ dm (mg per g of dry medium) in the standard condition (static) was achieved, whereas in tests under forced aeration of 1.4 and
Brazilian Archives of Biology and Technology. Publicado em: 2011-04
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34. Ethanol production from xylose by Pichia stipitis NRRL Y-7124 in a stirred tank bioreactor
The ethanol production by Pichia stipitis was evaluated in a stirred tank bioreactor using semi-defined medium containing xylose (90.0 g/l) as the main carbon source. Experimental assays were performed according to a 2² full factorial design to evaluate the influence of aeration (0.25 to 0.75 vvm) and agitation (150 to 250 rpm) conditions on ethanol product
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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35. Estudo da atividade fotocatalítica de nanotubos de TiO2 dopados com nitrogênio
This work presents the study of the catalytic performance of nanostructured titanium oxide, TiO2, doped with nitrogen in order to improve its photocatalytic activity under visible light. TiO2 nanotubes were prepared by hydrothermal method, where TiO2 particles react with NaOH at high temperature and pressure. Then the material was handled through an acid was
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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36. High levels of catalase in SOD mutants of Saccharomyces cerevisae in high aeration conditions
Saccharomyces cerevisiae mutants deficient in superoxide dismutase genes (sod1Δ, sod2Δ and sod1Δsod2Δ mutants) in a stationary phase of growth under high aeration conditions were subjected to H2O2 stress. All the mutants were sensitive after H2O2 treatment. Glutathione peroxidase levels were significantly lower in sod1Δ and sod2Δ single mutants than in
Publicado em: 2010