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Ultimately, Wang believes that these results, as well as the simplicity of the design and inexpensive materials, mean the technology should be relatively easy to develop on a larger scale. "The scale-up for both the catalysts and the device is not difficult," he says. "The construction of this material is completely metal-free, and one of the key components, the plastic bag, is commercialized, which makes it easy to obtain."

In the case of nanoparticles with a random orientation considering a size distribution, the d value dependence of the Hc value is described by

In PCD tools or inserts, segments of the diamond are bonded, typically using brazing, to a carbide substrate. PCD elements are produced by sintering micron-sized synthetic diamond powders to bond particles together in a process characterized by high temperatures and pressures.

AATCC Technical Manual 198 Horizontal wicking of Textiles. (American Association of Textile Chemists and Colorists, 2011).

Lee, W. Y. et al. Effect of Non-Chlorinated mixed solvents on charge transport and morphology of solution-processed polymer field-effect transistors. Adv. Funct. Mater. 24, 3524–3534 (2014).

The Ultra is a new high-temperature 3D printer optimized for PEEK, PEI, PEKK and other ultra-high-performance materials.

The magnetic hysteresis loops of ε-Fe2O3 for S-951–S-1198 with random orientation at 300 K show that the Hc values are 0.4 kOe (S-951), 0.7 kOe (S-979), 2.1 kOe (S-1002), 3.4 kOe (S-1020), 4.7 kOe (S-1032), 8.3 kOe (S-1044), 11.9 kOe (S-1061), 12.8 kOe (S-1063), 17.3 kOe (S-1104), 20.3 kOe (S-1142), and 20.9 kOe (S-1198) (Fig. 2a, Supplementary Fig. S3). The magnetization versus temperature plots for S-951–S-1104 are shown in Supplementary Fig. S4. As shown in the Hc versus d plot of Fig. 2b, the Hc value decreases towards zero with decreasing d. In Fig. 2b, the particle size dependences of the Hc values of BaFe12O19, SrFe12O19, and CoFe2O4 reported so far are also plotted for reference (Supplementary Fig. S5).

The Japan Powder Metallurgy Association (JPMA) has reported that the production of Powder Metallurgy structural parts and sintered bearings in Japan remained stable in 2018. Figures released by the…»

The suppression of chemisorption of small molecules on metals and electron transfer between metals and supports following HTR are the primary characteristics of SMSI. In situ diffuse reflectance infrared (IR) Fourier transform spectroscopy (DRIFTS) was therefore used to explore both effects because this technique is sensitive to both adsorption and electronic properties of metal surfaces with a suitable probe molecule (18, 19). Figure 1 shows the DRIFTS of CO adsorption on RR2Ti catalysts as a function of various pretreatments. Three bands at 2175, 2120, and 2103 cm−1 are observed for the RR2Ti-fresh sample. The first two are attributed to gaseous CO, and the latter is attributed to CO adsorbed on metallic Au (CO-Au0) (44). The CO-Au0 band intensity decreased monotonically with increasing reduction temperature and disappeared after a 500°C reduction, evidencing a loss in CO adsorption sites over gold precisely as anticipated for classical SMSI, where H2 and CO adsorption are markedly suppressed (8, 45). Although this decreased CO adsorption has been occasionally reported for Au NPs (41), complete loss of CO adsorption capacity has never been observed to our knowledge. Because the Au NP dimensions for all Au/TiO2 samples are similar (figs. S1 and S2A), the loss of CO adsorption cannot arise from a change in the gold dispersion. This conclusion is supported by the observation that CO adsorption was recovered for RR2Ti-(H500+O400) (which had a similar Au NP size distribution; fig. S1F) obtained from in situ O2 treatment of RR2Ti-H500 at 400°C for 1 hour under 10 volume % O2/He. Note that the recovered CO adsorption is blue-shifted relative to that of RR2Ti-fresh, suggesting that surface Au species have a slight positive charge after oxidation. This indicates that the Au-TiO2 interaction after a redox cycle slightly differs from that in the fresh RR2Ti material; however, we show later that this interaction can be fully reversed under repeated redox cycling. It should also be noted that the RR2Ti-H400 material exhibited a new band around 2070 cm−1, ascribed to CO adsorbed on a negatively charged Au surface (CO-Aux−) (44). The existence of such a negative Au surface species evidences electron transfer from TiO2 to Au following a ≥400°C reduction, as observed for the classical SMSI in TiO2-supported PGMs. Additional insight into the electronic properties of the RR2Ti-fresh, RR2Ti-H500, and RR2Ti-(H500+O400) samples was obtained by XPS; this was especially important for the RR2Ti-H500 material for which no CO was adsorbed.

RF filters traditionally have been designed based on libraries of standardized elements, such as rectangular cavities and waveguide cross-sections with perpendicular bends. Shapes and connections are dictated by manufacturing processes such as milling and spark eroding. As a result, cavities for RF filters typically need to be machined from two halves and bolted together, increasing weight, adding an assembly step, and requiring extra quality assessment.

Puls, L. N., Eadens, M. & Messersmith, W. Current Status of Src Inhibitors in Solid Tumor Malignancies. The Oncologist 16, 566–578 (2011).

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