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Now showing items 1 - 16 of 38

  • EXHAUST GAS PURIFYING CATALYST

    To provide an exhaust gas purifying catalyst which is capable of exhibiting more excellent gas purification performance, while reducing the amount of a noble metal used therein. An exhaust gas purifying catalyst wherein: a heat-resistant oxide is loaded with palladium and copper and/or an alloy of palladium and copper; the copper content is set larger than the palladium content; and the ratio of the palladium content is set to 0.2% by mass or less relative to the total amount of the heat-resistant oxide, palladium and copper. This exhaust gas purifying catalyst is able to decrease the cost by reducing the amount of a noble metal used therein, while efficiently purifying an exhaust gas, in particular, efficiently removing CO and NOx.
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  • Cardiac arrest due to airway obstruction in hereditary angioedema.

    Fuse, Takashi   Nakada, Taka-aki   Taniguchi, Masashi   Mizushima, Yasuaki   Matsuoka, Tetsuya  

    Hereditary angioedema (HAE) is a rare genetic disease caused by a deficiency of functional C1 esterase inhibitor that causes swelling attacks in various body tissues. We hereby report a case of out-of-hospital cardiac arrest due to airway obstruction in HAE. Cutaneous swelling and abdominal pain attacks caused by gastrointestinal wall swelling are common symptoms in HAE, whereas laryngeal swelling is rare. Emergency physicians may have few chances to experience cases of life-threatening laryngeal edema resulting in a delay from symptom onset to the diagnosis of HAE. Hereditary angioedema is diagnosed by performing complement blood tests. Because safe and effective treatment options are available for the life-threatening swellings in HAE, the diagnosis potentially reduces the risk of asphyxiation in patients and their blood relatives.=20
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  • Physical Activity Promotes Gait Improvement in Patients With Total Knee Arthroplasty

    Taniguchi, Masashi   Sawano, Shinichiro   Kugo, Masato   Maegawa, Shoji   Kawasaki, Taku   Ichihashi, Noriaki  

    Background: The study aimed to examine whether the improvement in gait function after total knee arthroplasty (TKA) correlated with the amount of physical activity and whether both gait self-efficacy and gait function are predictors of the amount of physical activity up to 6 months after surgery. Methods: Eighty-one patients were tested preoperatively and at the first and sixth postoperative months after TKA. Physical performance (timed up and go [TUG], sit to stand, muscle strength) and the modified gait efficacy scale scores were evaluated. The average amount of physical activity during the 6 postoperative months was measured with a pedometer with triaxial accelerometer. Stepwise multiple regression analyses were performed using TUG changes and postoperative physical activity. The discriminative properties of physical activity for improvement in gait function were subsequently investigated by applying a receiver operating characteristic curve analysis. Results: The multiple regression analyses indicated that the amount of physical activity and the improvement in sit-to-stand time were important in predicting improvement in TUG scores after TKA, and postoperative physical activity up to 6 months was predicted by the modified gait efficacy scale and TUG scores at the first postoperative month. The receiver operating characteristic curve analysis suggests that with a cutoff point of 3053 steps/d, the amount of physical activity may be a good predictive factor for gait function after TKA. Conclusion: The clinical implications are that increases in physical activity can promote improvement in gait function after TKA and present with a solid numerical target for the recommended amount of physical activity. (C) 2016 Elsevier Inc. All rights reserved.
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  • Physical Activity Promotes Gait Improvement in Patients With Total Knee Arthroplasty

    Taniguchi, Masashi   Sawano, Shinichiro   Kugo, Masato   Maegawa, Shoji   Kawasaki, Taku   Ichihashi, Noriaki  

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  • Quantity and Quality of the Lower Extremity Muscles in Women with Knee Osteoarthritis

    Taniguchi, Masashi   Fukumoto, Yoshihiro   Kobayashi, Masashi   Kawasaki, Taku   Maegawa, Shoji   Ibuki, Satoko   Ichihashi, Noriaki  

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  • Quantity and Quality of the Lower Extremity Muscles in Women with Knee Osteoarthritis.

    Taniguchi, Masashi   Fukumoto, Yoshihiro   Kobayashi, Masashi   Kawasaki, Taku   Maegawa, Shoji   Ibuki, Satoko   Ichihashi, Noriaki  

    The objective of the study described here was to compare lower extremity muscle quantity and quality between individuals with and those without knee osteoarthritis (OA). Twenty-one women with knee OA (mild, n =3D 8; severe, n =3D 13) and 23 healthy patients participated. Ultrasonography was used to measure muscle thickness (MT) and echo intensity (EI) of the rectus femoris, vastus intermedius, vastus lateralis, vastus medialis, biceps femoris, gluteus maximus, gluteus medius, gastrocnemius, soleus and tibialis anterior. MTs of the vastus medialis and vastus intermedius were smaller, and EIs of the vastus medialis, vastus intermedius, gluteus medius and tibialis anterior were larger, in the severe OA group compared than in the healthy group. Compared with the healthy group, the mild OA group had decreased MT and enhanced EI. Changes in quality and quantity occurring with knee OA progression differed among muscles. In the vastus medialis, change was observed from an earlier stage. Copyright =C2=A9 2015 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.
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  • Advantages of externally powered prosthesis with feedback system using pseudo-cineplasty.

    Nambu, Seiji   Ikebuchi, Mitsuhiko   Taniguchi, Masashi   Park, Choong Sik   Kitagawa, Takahiro   Nakajima, Shigeyoshi   Koike, Tatsuya  

    Externally powered upper-limb prostheses are difficult to use because of the lack of sensory feedback. Neuroprostheses have recently been developed for people with upper-limb amputation but are complicated, expensive, and still developing. We therefore designed a simple system by combining pseudo-cineplasty with extended physiological proprioception to provide sensory feedback to the body. We penetrated the palmaris longus tendon percutaneously with a metal ring, similar to that used in body piercing, in a nondisabled subject as a pseudo-cineplasty. The tendon and ring were connected to the system, and a sensory feedback experiment was performed. We investigated the ability of the user to determine the size of an object grasped by the prosthetic hand without visual information. The subject could distinguish between large and small objects with 100% accuracy and between small, medium, and large objects with 80% accuracy. In pseudo-cineplasty, control and sensory feedback are natural because the prosthetic hand is controlled by muscle contraction. Tension transmitted from the prosthetic hand is sensed via muscle spindles and skin sensors. This technique allows only partial sensory feedback but appears to offer several advantages over other human-machine interfaces. =20
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  • EXHAUST GAS PURIFYING CATALYST

    Disclosed is an exhaust gas purifying catalyst (1) containing a rare earth element, an alkaline earth element, zirconium and a noble metal. The atomic ratio of the alkaline earth element relative to the sum of the rare earth element and zirconium is not less than 10 at%. A part of the rare earth element and a part of zirconium form a complex oxide together with at least a part of the alkaline earth element, and this complex oxide and a part of the noble metal form a solid solution.
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  • Mg0.7Cu0.3Al2O4 Spinel-type Catalyst Active for CO Oxidation under Practical Conditions

    Taniguchi, Masashi   Uenishi, Mari   Tanaka, Hirohisa   Mizuno, Noritaka  

    Mg1-xCuxAl2O4 (x = 0-1.0) and Mg0.7M0.3Al2O4 (M = Mn, Co, and Ni) spinel-type catalysts with high surface areas were prepared. While a Cu-free MgAl2O4 spinel-type oxide showed no catalytic activity for the CO-O-2 reaction, the activity was significantly increased by the substitution of Mg (A-site) with Cu, and Mg0.7Cu0.3Al2O4 showed the highest catalytic activity under the practical conditions. The catalytic activities of Mg0.7M0.3Al2O4 (M = Mn, Co, Ni, and Cu) much depended on the kinds of M, and Cu was the best substituent metal. The catalytic activity of Mg0.7Cu0.3Al2O4 was much higher than those of La0.8Sr0.2CoO3 and LaMn0.6Cu0.4O3, which have been reported to be active for the CO-O-2 reaction. The highest catalytic activity of Mg0.7Cu0.3Al2O4 probably results from the easiest reducibility.
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  • Pseudo-ST-segment elevation induced by a continuous electrocardiography monitor filtering system

    Taniguchi, Masashi   Inata, Yu   Sofue, Toshiki   Takeuchi, Muneyuki  

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  • Brominated Unsaturated Fatty Acids from Marine Sponge Collected in Papua New Guinea

    Taniguchi, Masashi   Uchio, Yasuto   Yasumoto, Ko   Kusumi, Takenori   Ooi, Takashi  

    New brominated fatty acids (3, 5-8, 10) and new sterol esters (14-16) have been isolated from an unidentified marine sponge collected in Papua New Guinea. Their structures were determined on the basis of their spectroscopic data. A major component of the marine sponge (1) was tested for activities against Arutemia salina and some fungi.
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  • CATALYSTS

    Catalysts wherein noble metals are efficiently supported on the surfacemost layers thereof. Catalysts obtained by forming a double oxide layer on a carrier in such a way that the layer can contain a perovskite-type double oxide represented by the general formula (1) and other double oxide and dipping the resulting carrier in an aqueous solution of a noble metal salt to incorporate the solution in the carrier and form a noble metal layer in a state supported on the surfacemost layer of the carrier: AxByO3±δ (1) wherein A is at least one element selected from among rare earth elements and alkaline earth metals; B is at least one element selected from among transition elements (except rare earth elements); x is an atomic fraction of less than 1; y is an atomic fraction of 1.0; and δ is an excess or deficiency of oxygen.
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  • A theoretical study of the reactivity of Cu2O(111) surfaces: the case of NO dissociation

    Kishi, Hirofumi   Padama, Allan Abraham Bustria   Arevalo, Ryan Lacdao   Moreno, Joaquin Lorenzo Valmoria   Kasai, Hideaki   Taniguchi, Masashi   Uenishi, Mari   Tanaka, Hirohisa   Nishihata, Yasuo  

    We compare the electronic properties of Cu(111) and Cu2O(111) surfaces in relation to the dissociation of NO using first principles calculations within density functional theory. We note a well-defined three-fold site on both O- and Cu-terminated Cu2O surfaces which is verified as the active site for the adsorption and dissociation of NO. The interaction of Cu with O atoms results in the forward shifting of the local density of states and formation of unoccupied states above the Fermi level, compared to the fully occupied d band of pure Cu. These results give valuable insights in the realization of a catalyst without precious metal for the dissociation of NO.
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  • Relationship between ankle plantar flexor force steadiness and postural stability on stable and unstable platforms

    Hirono, Tetsuya   Ikezoe, Tome   Taniguchi, Masashi   Yamagata, Momoko   Miyakoshi, Kosuke   Umehara, Jun   Ichihashi, Noriaki  

    Purpose This study was aimed at determining the relationship between ankle plantar flexor force steadiness and postural control during single leg standing on stable and unstable platforms. Methods For the thirty-three healthy participants, force steadiness, at target torques of 5%, 20%, and 50% of the maximum voluntary torque (MVT) of the ankle plantar flexors, was measured. Force steadiness was calculated as the coefficient of variation of force. Single leg standing on stable and unstable platforms was performed using the BIODEX Balance System SD. The standard deviation of the anteroposterior center of pressure (COP) displacements was measured as the index for postural control. During both measurements, muscle activities of the soleus were collected using surface electromyography. Results On the stable platform, the COP fluctuation significantly correlated with force steadiness at 5% of MVT (r =3D 0.512, p =3D 0.002). On the unstable platform, the COP fluctuation significantly correlated with force steadiness at 20% of MVT (r =3D 0.458, p =3D 0.007). However, the extent of muscle activity observed for a single leg standing on both stable and unstable platforms was significantly greater than the muscle activity observed while performing force steadiness tasks at 5% and 20% of MVT, respectively. Conclusion Postural stability during single leg standing on stable and unstable platforms may be related to one's ability to maintain constant torque at 5% and 20% of MVT regardless of the muscle activity. These results suggest that the required abilities to control muscle force differ depending on the postural control tasks.
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  • Intelligent catalyst having the self-regenerative function of Pd, Rh and Pt for automotive emissions control

    Tanaka, Hirohisa   Uenishi, Mari   Taniguchi, Masashi   Tan, Isao   Narita, Keiichi   Kimura, Mareo   Kaneko, Kimiyoshi   Nishihata, Yasuo   Mizuki, Jun'ichiro  

    The self-regenerative function of precious metals in the intelligent catalyst is an epoch-making technology in the history of automotive catalysts after the 1970's. The mechanism of the self-regenerative function is studied by X-ray absorption fine-structure (XAFS) analyses. The function was realized through a cyclic movement of Pd between the outside (as Pd nanoparticles) and the inside (as Pd cations in the lattice) of the perovskite crystal in synchronization with the inherent fluctuations between reductive and oxidative (redox) atmospheres that occur in real automotive exhaust gases. As the result, the growth of Pd particles can be suppressed during the entire lifetime of the vehicle. Moreover, the speed of this function was measured at the time resolution of a 10 ms by in situ energy dispersive XAFS, and it is proved that the self-regenerative function occurs at an extremely high speed. Furthermore, the new perovskite catalysts which have the self-regenerative function of Rh and Pt, as well as Pd, are discussed here. This self-regenerative function provides a new and useful tool for designing the future catalyst technology. (C) 2006 Elsevier B.V. All rights reserved.
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  • Shiozawa, Yoshinori; Morioka, Masashi; Taniguchi, Kasuhisa: Microfoundations of Evolutionary Economics

    Lavoie, Marc  

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