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Three-dimensional fluid flow in continuous casting tundishes with and without flow control devices is first studied. The results indicate that flow control devices are effective to control the strong stirring energy within the inlet zone, and other zones are with much uniform streamline. By dividing tundish into two zones with different inclusion removal mechanisms the inclusion removal is calculated. Three modes of inclusion removal from molten steel in the tundish, i.e., flotation to the free surface, collision and coalescence of inclusions to form larger ones, and adhesion to the lining solid surfaces, are taken into account. The Brownian collision, Stokes collision, and turbulent collision are examined and discussed. The suitable coagulation coefficient is discussed, and a value of 0.18 is derived. Calculation results indicate that, besides flotation, collision of inclusion and adhesion to the lining solid surfaces are also important ways for inclusion removal from molten steel in tundish especially for the smaller inclusions. The flotation removal holds 49.5 pct, and the adhesion removal holds 29.5 pct for the tundish with flow control devices; the collision effect is reflected in improving flotation and adhesion. Finally, industrial experiment data are used to verify the inclusion removal model.

Das Anbringen von Collagen (Col) an Siliciumoxid‐Nanopartikel (MSNs) über eine Disulfidbrücke und die anschließende Einführung von Lactobionsäure (LA) als zielführende Einheit ergaben ein redoxresponsives System für den zellspezifischen intrazellulären Wirkstoff‐Transport und die effiziente Endozytose (siehe Bild). Die kontrollierte Freisetzung des Modellwirkstoffs Fluoresceinisothiocyanat (FITC) gelang durch Spaltung der Disulfidbrücken.

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Novel porous aromatic frameworks, PAF-18-OH and its lithiated derivative PAF-18-OLi, have been successfully synthesized. In particular, PAF-18-OLi displays significant enhancements of H 2 and CO 2 adsorption capacity, especially for the CO 2 uptake (14.4 wt%). More valuably, the stable PAF-18-OLi material exhibits high CO 2 /N 2 selectivity, as high as 129 in the case of CO 2 capture from simulated postcombustion flue gas mixtures (85% N 2 and 15% CO 2 ). Furthermore, the PAF-18-OLi has shown an improved H 2 storage capacity after lithiation.

The oscillatory behavior of a double-walled carbon nanotubes with a rotating inner tube is investigated using molecular dynamics simulation. In the simulation, one end of the outer tube is assumed to be fixed and the other is free. Without any prepullout of the rotating inner tube, it is interesting to observe that self-excited oscillation can be triggered by nonequilibrium attraction of the ends of two tubes. The oscillation amplitude increases until it reaches its maximum with decrease of the rotating speed of the inner tube. The oscillation of a bitube is sensitive to the gap between two walls. Numerical results also indicate that the zigzag/zigzag commensurate model with a larger gap of >0.335 nm can act as a terahertz oscillator, and the armchair/zigzag incommensurate model plays the role of a high amplitude oscillator with the frequency of 1 GHz. An oblique chiral model with a smaller gap of <0.335 nm is unsuitable for the oscillator because of the steep damping of oscillation.

A novel 4(4) square grid microporous metal-organic framework (MOF) JUC-110 with 1D open channels has been synthesized, which shows exceptional hydrothermal stability and capability for separating alcohols from water in gas chromatographic (GC) separation.