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Department of Veterinary Medicine
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Faculty of Agriculture
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    ABSTRACT: Ceria-supported chromium, molybdenum, and tungsten catalysts were prepared by impregnation. The prepared catalysts were characterized using N-2 adsorption, X-ray diffraction (XRD), the temperature-programmed reduction (H-2-TPR), and X-ray photoelectron spectroscopy (XPS) measurements. The catalytic activity in CO hydrogenation was evaluated using a fixed-bed pressurized flow reaction system under the following conditions: 260-300 degrees C, 5.0 MPa, GHSV of 5000 h(-1), and a H-2/CO ratio of 1.0-2.0. The effects of ceria support, group VI metals, and catalyst activation methods on C2+ alcohol synthesis were investigated. The use of ceria supports resulted in a decrease in the selectivity for CO2, and in increases in the selectivity for C2+ alcohols and CO conversion. The selectivity for alcohols on the Mo-based catalysts was higher than those on the corresponding Cr or W-based catalysts. A comparison of the methods of activation for the K(055)Co(06)20MoCe catalyst demonstrated that sulfidation produced the highest CO conversion and selectivity for C2+ alcohols, as well as the lowest, hydrocarbon selectivity. XPS and H-2-TPR measurements show that the mixed metal sulfide phases, e.g., the Co-Mo-S phase, and the thiol group on the catalysts enhanced the formation of C2+ alcohols.
    Fuel Processing Technology 09/2014; 125:86–93. DOI:10.1016/j.fuproc.2014.03.033
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    ABSTRACT: Abstract 1. Growing chickens decrease their voluntary food intake when they receive a diet deficient in a single essential amino acid. Our previous studies suggest that the decreased food intake was associated with some metabolic changes. 2. In order to reveal the involvement of plasma lysine fluctuations in the reduction of food intake, we examined if maintaining the plasma lysine concentration of chickens on a lysine-free diet (the purified diet contained no lysine) restore the food intake to that of the control (lysine hydrochloride 11.9 g/kg) group. 3. Male egg-type chickens at 21 d of age were injected with the lysine at doses of 0.1g/ml one h after presenting the lysine-free diet. This injection increased the plasma lysine concentration one h later and kept it similar to that of the control group for the following 2 h. Chickens ate the lysine-free diet as much as the control diet when their plasma lysine concentration was kept at a similar level to the control group. Injection of saline or alanine (0.12 g, iso-nitrogenous to lysine 0.1 g) into the crop of chickens on the lysine-free diet did not bring about the variations of food intake and plasma lysine concentrations as observed in those with lysine. 4. These findings show that the food intake variation was attributed to the plasma lysine concentration in the chickens on the lysine-free diet.
    British Poultry Science 08/2014; 55(5). DOI:10.1080/00071668.2014.949623
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    ABSTRACT: A flexible circular saw, which can be used in a novel machining process for high-speed carbon fiber-reinforced plastic (CFRP) plate cutting, was developed. In this process, the saw is deflected like a bowl-like shape. A cross-section of the saw body then forms a circular arc. A curved line can therefore be cut without interference by the bowl-like deflection. In addition, the radius of the cross-section of the saw body can be controlled by adjusting the deflection. This process therefore allows curves to be cut with a varied radius using a single saw. This process can carry out high-speed curved-line cutting with a feed rate of 3 m/min on a CFRP plate. However, it is difficult to cut free-form curves using a flexible circular saw. Therefore, in this research, a new technique that can cut free-form curves using a flexible circular saw was proposed. Then, a cutting test applying the technique was carried out.
    Precision Engineering 07/2014; 38(3). DOI:10.1016/j.precisioneng.2014.02.011


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Top publications last week by downloads

Plant Abiotic Stress 11/2007: pages 248 - 265; ISBN: 9780470988503
Applied Thermal Engineering 11/2001; 21(16-21):1631-1642. DOI:10.1016/S1359-4311(01)00039-4

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