RESUMO
Nickelâ»titanium (Ni-Ti) alloy has been selected as stent material given its good biocompatibility. In this study, experimental research on this material was conducted using magnetic field-assisted electrical discharge machining (EDM). The surface topography of the machined workpiece was analyzed with a scanning electron microscope (SEM). Hydrophobicity was measured by using an optical contact angle measuring instrument. The roughness values of different positions on the surface were measured using a TR200 roughness instrument. Results showed that the composite structure of solidification bulgeâ»craterâ»poreâ»particle can be prepared on the surface of the Ni-Ti alloy through magnetic mixed EDM using suitable processing parameters. Moreover, the contact angle of the surface reaches 138.2°.
RESUMO
A method for site-specific and high yield modification of tobacco mosaic virus coat protein (TMVCP) utilizing a genetic code expanding technology and copper free cycloaddition reaction has been established, and biotin-functionalized virus-like particles were built by the self-assembly of the protein monomers.
Assuntos
Biotina/química , Coloração e Rotulagem , Vírus do Mosaico do Tabaco/genética , Proteínas Virais/genética , Proteínas Virais/metabolismo , Vírion/química , Vírion/metabolismo , Biotina/metabolismo , Modelos Moleculares , Estrutura Molecular , Propriedades de Superfície , Proteínas Virais/químicaRESUMO
The uptake of Cs(I) on Beishan soil (BS) was strongly dependent on ionic strength and hardly dependent on pH over the observed pH range (6-13). The foreign cations competed with Cs(I) in the following order: K(+)>Mg(2+)>Ca(2+)≈Na(+)>Li(+). The uptake of Cs(I) was a pseudo-second-order process and the activation energy, E(a), was about 2.16kJ/mol. EDS analysis suggested that the most of Cs(I) was converged on the basal plane, and a small fraction bound on the frayed sorption site. All the results suggested that ion exchange was the main approach for Cs(I) uptake on BS.
