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PCs all-in-one for dummies
If you're a PC owner, you have a pretty good idea of just how much there is to discover about your PC, whether you use it for work or play. Comprised of nine minibooks, this All-in-One guide covers essential PC topics from soup through nuts, including the latest updates to PC hardware, Windows 8, the Internet, Office 2013, digital media, upgrading and troubleshooting, social media, and home networking.
Book
Photonic Crystals Assembled by SiO.sub.2@Ni/TiO.sub.2 for Photocatalytic Reduction of CO.sub.2
Photonic crystal (PC) can manipulate light propagation due to the presence of photonic band gap (PBG). PBG can redistribute density of optical state. When the PBG overlaps with the emission of an emitter embedded in PC, the excited electrons will be prohibited from transferring to the ground state. Introducing PC with suitable PBG into photocatalyst will partially reduce the electron-hole combination and improve photocatalytic efficiency. Meanwhile, appropriate specific surface area of 3-D quasi-ordered structure can increase the contact area of catalysts and CO.sub.2 to provide more catalytic sites, which plays an important role in the improvement of photocatalytic activity. Herein, SiO.sub.2@Ni/TiO.sub.2 PCs with designed PBG were fabricated and applied as catalysts for photocatalytic CO.sub.2 reduction using [Ru(bpy).sub.3]Cl.sub.2·6H.sub.2O as photosensitizer. The designed SiO.sub.2@Ni/TiO.sub.2 PCs has a suitable specific surface area and certain surface roughness, which can effectively adsorb CO.sub.2 for photocatalytic reduction. Meanwhile, the PBG of SiO.sub.2@Ni/TiO.sub.2 PCs matches well with the electron-hole combination energy of the photosensitizer, the electron-hole combination process from the excited state falling back to the ground state can be prevented partially. Suppressing the falling of excited electrons will make electrons transfer to the catalyst, thereby improving the photocatalytic performance.
Journal Article
How to talk to your computer
Introduces young children to computer languages and explains programs and how to write them.
Book
Supercritical COsub.2 Impregnation of Clove Extract in Polycarbonate: Effects of Operational Conditions on the Loading and Composition
The development of active packaging for food storage containers is possible through impregnation of natural extracts by supercritical CO[sub.2]-assisted impregnation processes. The challenge of scCO[sub.2]-impregnation of natural extracts is to control the total loading and to ensure that the composition of the loaded extract may preserve the properties of the crude extract. This study aimed at investigating the scCO[sub.2]-impregnation of clove extract (CE) in polycarbonate (PC) to develop antibacterial packaging. A design of experiments was applied to evaluate the influences of temperature (35–60 °C) and pressure (10–30 MPa) on the clove loading (CL%) and on the composition of the loaded extract. The CL% ranged from 6.8 to 18.5%, and the highest CL% was reached at 60 °C and 10 MPa. The composition of the impregnated extract was dependent on the impregnation conditions, and it differed from the crude extract, being richer in eugenol (81.31–86.28% compared to 70.06 in the crude extract). Differential scanning calorimetry showed a high plasticizing effect of CE on PC, and high CL% led to the cracking of the PC surface. Due to the high loading of eugenol, which is responsible for the antibacterial properties of the CE, the impregnated PC is promising for producing antibacterial food containers.
Journal Article
