Membrane Transport
Mostrando 13-24 de 4264 artigos, teses e dissertações.
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13. Removal of Chromium(VI) from Industrial Effluents Through Supported Liquid Membrane Using Trioctylphosphine Oxide as a Carrier
The present study describes extraction of chromium(VI) through supported liquid membrane (SLM), Celgard 2400, which was impregnated with trioctylphosphine oxide (TOPO) dissolved in toluene. The stripping phase was comprised of diphenylcarbazide (DPC) in sulfuric acid (H2SO4) whereas the feed phase consists of potassium dichromate (K2Cr2O7) and hydrogen perox
J. Braz. Chem. Soc.. Publicado em: 2016-01
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14. EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE
Abstract Our study investigates the influence of sintering temperature on the microstructure (grain size distribution, grain boundary length), electrical conductivity, and oxygen permeation properties of permeation membranes. For this purpose, SrSc0.1Co0.9O3-δ samples with different microstructures were prepared by varying the sintering temperature from 110
Braz. J. Chem. Eng.. Publicado em: 2015-09
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15. Characteristics of dr1790 disruptant and its functional analysis in Deinococcus radiodurans
Deinococcus radiodurans (DR) is an extremophile that is well known for its resistance to radiation, oxidants and desiccation. The gene dr1790 of D. radiodurans was predicted to encode a yellow-related protein. The primary objective of the present study was to characterize the biological function of the DR1790 protein, which is a member of the ancient yellow/
Braz. J. Microbiol.. Publicado em: 2015-06
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16. Polyimide hollow fiber membranes for CO2 separation from wet gas mixtures
Matrimid®5218 hollow fiber membranes were prepared using the dry-wet spinning process. The transport properties were measured with pure gases (H2, CO2, N2, CH4 and O2) and with a mixture (30% CO2 and 70% N2) in dry and wet conditions at 25 ºC, 50 ºC, 60 ºC and 75 ºC and up to 600 kPa. Interesting values of single gas selectivity up to 60 ºC (between 31
Braz. J. Chem. Eng.. Publicado em: 2014-12
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17. Myoglobin entrapment in poly(vinyl alcohol) dense membranes
Our goal in this study was the immobilization of myoglobin in poly(vinyl alcohol) dense membranes. Glutaraldehyde was investigated both as the crosslinking agent, aiming to increase the membrane stability in aqueous medium, and as the vehicle to bind myoglobin and PVA. Reaction and membrane synthesis were carried simultaneously in mild operating conditions i
Braz. J. Chem. Eng.. Publicado em: 2014-09
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18. Effects of Allelochemicals from Ficus microcarpaon Chlorella pyrenoidosa
This study was performed in order to isolate and identify unknown allelochemicals from Ficus microcarpa, and to investigate the inhibitory to bloom-forming of green alga Chlorella pyrenoidosa. Through gradient elution, fraction C2, whose inhibition of alga growth in diverse extracts was the strongest was shown to cause significant reductions of maximum quant
Braz. arch. biol. technol.. Publicado em: 2014-08
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19. Effects of powdery mildew infection on chloroplast and mitochondrial functions in rubber tree
Powdery mildew (Oidium heveae Steinm.) is one of the most important leaf diseases in rubber tree (Hevea brasiliensis). However, physiological and molecular processes associated with the Hevea-powdery mildew interaction are still unclear. In this study, effects of powdery mildew infection on the mitochondrial and chloroplast functions in rubber tree were comp
Trop. plant pathol.. Publicado em: 2014-06
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20. Expression of Saccharomyces cerevisiae α-glucoside transporters under different growth conditions
Important biotechnological processes depend on the efficient fermentation by Saccharomyces cerevisiae yeasts of starch hydrolysates rich in maltose and maltotriose. The rate-limiting step for fermentation of these α-glucosides is the transport across the plasma membrane of the cells. In order to contribute to a better understanding of maltose and maltotrios
Braz. J. Chem. Eng.. Publicado em: 2014-03
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21. Stability of a nanofiltration membrane after contact with a low-level liquid radioactive waste
This study investigated the treatment of a liquid radioactive waste containing uranium (235U + 238U) using nanofiltration membranes. The membranes were immersed in the waste for 24-5000 h, and their transport properties were evaluated before and after the immersion. Surface of the membranes changed after immersion in the waste. The SW5000 h specimen lost its
Quím. Nova. Publicado em: 2013
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22. Avaliação do transportador dopaminérgico em jogadores patológicos através de imagens de SPECT com TRODAT-1- 99mTc / Evaluation of dopamine transporter in pathological gamblers submitted to brain SPECT imaging using TRODAT-1-99mTc
Jogo patológico (JP) pode ser definido pela persistência e recorrência do comportamento de apostar em jogos de azar, apesar de prejuízos em diversas áreas da vida decorrentes dessa atividade. O JP é considerado um transtorno do controle de impulso e um modelo de dependência comportamental. Diferentes estudos têm comprovado o envolvimento de vias dopa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2012
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23. Desenvolvimento de vetores não virais para entrega gênica baseados na cadeia leve de dineína Rp3 = : Development of non viral vectors for gene delivery based on dynein light chain Rp3 / Development of non viral vectors for gene delivery based on dynein light chain Rp3
Gene delivery is a promising technique with great medical potential that consists in the introduction of exogenous nucleic acids, and can be applied for gene therapy as well as DNA vaccination. However, its use is still limited by the lack of an ideal delivery vector, which is both safe and efficient. Although much more effective, viral vectors still raise s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2012
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24. Uma abordagem neurofisiológica da acetilcolina em plantas de milho hidratadas e sob condições de estresse hídrico / A neurophysiological approach to acetylcholine in maize plants hydrated and under water stress conditions
The occurrence of action potential and neurotransmitters, the major components of animal nervous system, in plants, bacteria and fungi, shows the universality of signaling principles and information transmission in the way of chemical and electrical signals in all organisms. These study topics, along with plant intelligence and vesicular-based auxin transpor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2012