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Now showing items 1 - 5 of 5

  • Fuel system for vehicle with engine

    A fuel system for a vehicle with an engine includes: a fuel tank for storing fuel: first and second ports disposed on a wall of the fuel tank, between which wall and a fuel fluid level a clearance is created when the fuel is contained in an allowable maximal amount in the fuel tank of the vehicle in a horizontal state, the first and second ports being positioned frontward and rearward, respectively, in a longitudinal direction of the vehicle, and the first port and the second port being out of alignment in a lateral direction; a canister for adsorbing and releasing a fuel vapor; an inflow line for sending the fuel vapor generated in the fuel tank to the canister through the first and second ports; and a discharge line for sending the fuel vapor from the canister to an air-intake path to the engine.
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  • Work vehicle having hydraulic stepless speed changing apparatus

    A work vehicle includes a hydraulic stepless speed changing apparatus and a gear type speed changing apparatus operable to receive output from the hydraulic stepless speed changing apparatus to convert it into a plurality of stages of speed. A return oil passage connected to a high-pressure side circuit of the hydraulic stepless speed changing apparatus is connected to a hydraulic tank. The return oil passage incorporates an unload valve and a throttle valve, between which an operably coupling mechanism is provided. This operably coupling mechanism switches over the unload valve to an unload condition in response to an operational displacement of a brake operating member for operating a brake to its braking side.
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  • Investigation of the giant step bunching induced by the etching of 4H-SiC in Ar–H2 mix gases

    Yuuki Ishida   Sadafumi Yoshida  

    We have investigated the etching of 4H-SiC by H2 and the occurrence of giant step bunching (GSB) on SiC surfaces in an Ar–H2 gas system. In this paper, we propose a new method of determining the rate-limiting process under a certain etching condition and a new chemical kinetics model of SiC etching at the mass transfer limit in the Ar–H2 gas system. Using the new determination method, we have found that GSB occurs only at the mass transfer limit. Combining the new chemical kinetics model with the cluster effect model of the GSB occurrence mechanism, we have derived the theoretical boundary line for the temperature dependence of H2 concentration on GSB occurrence and shown the good agreement between the theoretical boundary line and the line derived from experimental results.
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  • Epitaxial SiC single crystal substrate and method of manufacture of epitaxial SiC single crystal substrate

    An epitaxial SiC single crystal substrate including a SiC single crystal wafer whose main surface is a c-plane or a surface that inclines a c-plane with an angle of inclination that is more than 0 degree but less than 10 degrees, and SiC epitaxial film that is formed on the main surface of the SiC single crystal wafer, wherein the dislocation array density of threading edge dislocation arrays that are formed in the SiC epitaxial film is 10 arrays/cm2 or less.
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  • Evaluation of cathepsin B activity for degrading collagen IV using a surface plasmon resonance method and circular dichroism spectroscopy

    Atsushi Shoji   Mitsutaka Kabeya   Yuuki Ishida   Akio Yanagida   Yoichi Shibusawa   Masao Sugawara  

    Graphical abstract Highlights • The optimal pH of cathepsin B activity for degrading collagen IV is 4. • The lower stability of triple helical conformation increases cathepsin B activity. • The endo- and exopeptidase activity participates in degrading collagen IV at pH 4. • The affinity of cathepsin B to collagen IV at pH 4 is higher than that at pH 5. Abstract Evaluation of cathepsin B activities for degrading collagen IV and heat-denatured collagen IV (gelatin) were performed by surface plasmon resonance (SPR) and circular dichroism (CD) measurements. The optimal pH of cathepsin B activity for degrading each substrate was around 4.0. The ΔRU (15 min) , which is a decrease in the SPR signal at 15 min after injection of cathepsin B, was smaller for collagen IV than for heat-denatured collagen IV owing to the presence of triple-helical conformation. An unstable nature of the triple-helical conformation of collagen IV at pH 4.0 was shown by the CD study. Degrading collagen IV by cathepsin B was facilitated owing to a local unwinding of the triple-helical conformation caused by proteolytic cleavage of the non-helical region. The concentration dependence of the initial velocity for degrading collagen IV by cathepsin B at pH 4.0 was biphasic, showing that cathepsin B at low concentration exhibits exopeptidase activity, while the enzyme at high concentration exhibits endopeptidase activity. The kinetic parameters for the exopeptidase activity of cathepsin B toward collagen IV and heat-treated collagen IV were evaluated and discussed in terms of the protease mechanism.
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