Encontrados 36 documentos, a visualizar página 1 de 4
New dextrin nanomagnetogels as contrast agents for magnetic resonance imaging
Gonçalves, C.; Lalatonne, Y.; Melro, L.; Badino, G.; Ferreira, M. F. M.; David, L.; Geraldes, C. F. G. C.; Motte, L.; Martins, J. A.; Gama, F. M.This study aims at the production and characterization of a “nanomagnetogel” consisting of superparamagnetic iron oxide nanoparticles (g-Fe2O3) stabilized within a hydrophobized-dextrin nanogel. The nanomagnetogel obtained was extensively characterized with respect to physico-chemical (transmission electron microscopy, cryo-scanning electron microscopy, dynamic light scattering, small angle X-ray scattering), m...
New dextrin nanomagnetogels as contrast agents for magnetic resonance imaging
Gonçalves, Catarina; Lalatone, Y.; Melro, Liliana Sofia da Silva Ferreira Pinto; Badino, G.; Ferreira, M. F. M.; David, L.; Geraldes, C. F. G. C.This study aims at the production and characterization of a “nanomagnetogel” consisting of superparamagnetic iron oxide nanoparticles (γ-Fe2O3) stabilized within a hydrophobized-dextrin nanogel. The nanomagnetogel obtained was extensively characterized with respect to physico-chemical (transmission electron microscopy, cryo-scanning electron microscopy, dynamic light scattering, small angle X-ray scattering), m...
Antimicrobial activity and chemical composition of essential oil of Pelargonium...
Andrade,Milene A.; Cardoso,Maria G.; Batista,Luís R.; Freire,Juliana M.; Nelson,David L.The chemical composition of the essential oil from the leaves of Pelargonium odoratissimum (L.) L'Hér., Geraniaceae, was determined and the antimicrobial activities against the Aspergillus flavus CML 1816, Aspergillus carbonarius CML1815 and Aspergillus parasiticus CMLA 817 fungi, as well the Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25 992 bacteria were evaluated. The essential oil was isolate...
Evidence for a neural model to evaluate symmetry in V1
Barlow, Horace B.; Berry, David L.50 years ago Hubel and Wiesel discovered simple and complex cells in V1, but there is still no consensus on their functional roles. It is agreed that complex cells are more often selective for direction of motion than simple cells, that there are differences in the way they combine information within their receptive fields, and that complex cells probably receive most of their input from simple cells, but what ...
Winds and cloud morphology in the southern polar region of Venus
Luz, David; Berry, David L.; Peralta, Javier; Piccioni, Giuseppe; Drossart, Pierre; VIRTIS-Venus Express TeamSpinning on average 60 times faster than the surface, the atmosphere of Venus is superrotational, a state in which the averaged angular momentum is much greater than that corresponding to co-rotation with the solid globe. The rapid mean flow, which is main- tained by momentum transports in the deep atmo- sphere, presents a puzzle to the atmospheric and plan- etary sciences[1]. After previous missions revealed a...
South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mappi...
Luz, David; Berry, David L.; Peralta, Javier; Drossart, Pierre; Piccioni, GiuseppeWe report on measurements of Venus cloud velocities from VIRTIS/Venus Express observations of the south polar region of Venus. Cloud tracking has been performed using a method of automated digital correlation. Tracking has been performed on pairs of monochromatic VIRTIS images selected mainly in the 5 μm window, but also at 1.74, 2.3, 3.93 micrometers. Wind measurements from vector retrievals based on automated...
Skin-to-skin care for procedural pain in neonates (Cochrane Protocol)
Johnston, Celeste; Campbell-Yeo, Marsha; Fernandes, Ananda Maria; Inglis, Darlene; Streiner, David L.; Zee, RebekahProtocolo de Revisão Sistemática Cochrane
Vanadium-lithium alkoxides: synthesis, structure, spectroscopic characterisatio...
Reis,Dayane M.; Westrup,Kátia Cristina M.; Nunes,Giovana G.; Barison,Andersson; Ribeiro,Ronny R.; Sá,Eduardo L. de; Hughes,David L.; Soares,Jaísa F.Two complexes containing both vanadium and lithium, [V6Li10O8(ONep)14O2Si(Me)2(ONep)2] (1) and [V(ONep)3(µ-ONep)2Li(thf)2] (2), Nep = neopentyl, Me = methyl and thf = tetrahydrofuran, have been isolated in high yield and characterised by a number of techniques including X-band electron paramagnetic resonance (EPR) and 29Si¹H nuclear magnetic resonance (NMR) spectroscopies, magnetic susceptibility measurements a...
Resilience of soil microbial activity and of amino acid dynamics to the removal...
Avramides,Elizabeth J.; Christou,Matina; Jones,David L.Many temperate agricultural soils have prolonged periods in the winter when plant carbon inputs to the soil are low. Soil maintained at low temperature in the absence of plants was used to simulate the conditions in a vineyard soil during winter. In a four month simulated overwintering period we showed that the concentration of dissolved organic carbon and nitrogen in soil solution slowly declined alongside het...
North American Rendering: processing high quality protein and fats for feed
Meeker,David L.One third to one half of each animal produced for meat, milk, eggs, and fiber is not consumed by humans. These raw materials are subjected to rendering processes resulting in many useful products. Meat and bone meal, meat meal, poultry meal, hydrolyzed feather meal, blood meal, fish meal, and animal fats are the primary products resulting from the rendering process. The most important and valuable use for these...
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