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Effect of a combination of astaxanthin supplementation, heat stress, and intermittent reloading on satellite cells during disuse muscle atrophy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2018年第11期19卷 844-852页

作者： Toshinori YOSHIHARA Takao SUGIURA nobuyuki MIYAJI Yuki yamamoto Tsubasa SHIBAGUCHI Ryo KAKIGI Hisashi NAITO Katsumasa GOTO Daijiro OHMORI Toshitada YOSHIOKA Graduate School of Health and Sports Science Juntendo UniversityInzaiChiba 270-1695Japan Faculty of Education Yamaguchi UniversityYamaguchiYamaguchi 753-8513Japan Toyo Koso Kagaku Co.Ltd. UrayasuChiba 279-0041Japan Institute of Health and Sports Science Kurume UniversityKurumeFukuoka 839-8502Japan Institute of Liberal Arts and Science Kanazawa UniversityKanazawaIshikawa 920-1192Japan Faculty of Medicine Juntendo UniversityBunkyo-kuTokyo 113-0033Japan Graduate School of Health Sciences Toyohashi SOZO UniversityToyohashiAichi 440-8511Japan Department of Chemistry School of MedicineJuntendo UniversityInzaiChiba 270-1695Japan Hirosaki Gakuin University HirosakiAomori 036-8577Japan

We examined the effect of a combination of astaxanthin （AX） supplementation, repeated heat stress, and intermittent reloading （IR） on satellite cells in unloaded rat soleus muscles. Forty-nine male Wistar rats （8-week-old） were divided into control, hind-limb unweighting （HU）, IR during HU, IR with AX supplementation, IR with repeated heat stress （41.0-41.5 ℃ for 30 min）, and IR with AX supplementation and repeated heat stress groups. After the experimental period, the antigravitational soleus muscle was analyzed using an immunohistochemical technique. Our results revealed that the combination of dietary AX supplementation and heat stress resulted in protection against disuse muscle atrophy in the soteus muscle. This protective effect may be partially due to a higher satellite cell number in the atrophied soleus muscle in the IR/AX/heat stress group compared with the numbers found in the other groups. We concluded that the combination treatment with dietary AX supplementation and repeated heat stress attenuates soleus muscle atrophy, in part by increasing the number of satellite cells.

关键词： Antioxidant astaxanthin Disuse muscle atrophy Heat stress Satellite cell

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The second continent:Existence of granitic continental materials around the bottom of the mantle transition zone

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Geoscience Frontiers 2013年第1期4卷 1-6页

作者： Kenji Kawai Shinji yamamoto Taku Tsuchiya Shigenori Maruyama Department of Earth Science University of CaliforniaSanta BarbaraCA 93106USA Department of Earth and Planetary Sciences Tokyo Institute of TechnologyOokayama 2-12-1MeguroTokyo 152-8551Japan Department of Earth and Planetary Sciences Tokyo Institute of TechnologyOokayama 2-12-1MeguroTokyo 152-8551.Japan Department of Earth Science and Astronomy Graduate School of Arts and SciencesThe University of TokyoKomaba 3-8-1MeguroTokyo 153-8902Japan Geodynamics Research Center Ehime University.Bunkyo-cho 2-5MatsuyamaEhime 790-8577Japan

It has been thought that granitic crust, having been formed on the surface, must have survived through the Earth＇s evolution because of its buoyancy. At subduction zones continental crust is predominantly created by arc magmatism and is returned to the mantle via sediment subduction, subduction erosion, and continental subduction. Granitic rocks, the major constituent of the continental crust, are lighter than the mantle at depths shallower than 270 km, but we show here, based on first principles calcu- lations, that beneath 270 km they have negative buoyancy compared to the surrounding material in the upper mantle and transition zone, and thus can be subducted in the depth range of 270-660 km. This suggests that there can be two reservoirs of granitic material in the Earth, one on the surface and the other at the base of the mantle transition zone （MTZ）. The accumulated volume of subducted granitic material at the base of the MTZ might amount to about six times the present volume of the continental crust. Our calculations also show that the seismic velocities of granitic material in the depth range from 270 to 660 km are faster than those of the surrounding mantle. This could explain the anomalous seismic-wave velocities observed around 660 km depth. The observed seismic scatterers and reported splitting of the 660 km discontinuity could be due to jadeite dissociation, chemical discontinuities between granitic material and the surrounding mantle, or a combination thereof.

关键词： Continental growthGraniteFirst principlesMantle transition zoneTectonicsGeodynamics

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Comparison of the activities of binder-added and binder-free Mo/HZSM-5 catalysts in methane dehydroaromatization at 1073 K in periodic CH_4-H_2 switch operation mode

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Journal of Natural Gas Chemistry 2012年第6期21卷 729-744页

作者： Yuebing Xu Hongtao Ma Yo yamamoto Yoshizo Suzuki Zhanguo Zhang National Institute of Advanced Industrial Science and Technology (AIST) 16-10nogawa Tsukuba 305-8569 Japan Meidensha Co. Osaki 2-8-1 Shinagawa-ku Tokyo141-8565 Japan

Three industry-supplied, well-shaped Mo/HZSM-5 catalysts, two binder-added and one binder-free, were tested for the first time in methane dehydroaromatization to benzene at 1073 K and 10000 mL/（g·h） in periodic CH4-H2 switch operation mode, and their catalytic performances were compared with those of three self-prepared, binder-free powder Mo/HZSM-5 catalysts. XRD, 27Al NMR, SEM, BET and NH3-TPD characterizations of all the catalysts show that the zeolites in the two binder-added catalysts are comparable to those in the three binder-free powder catalysts in crystallinity, crystal size, micropore volume and Br{／o}nsted acidity. The test results, on the other hand, show that the catalytic performances of the two binder-added catalysts are worse than those of the four binder-free catalysts on both catalyst mass and zeolite mass bases. Then, TPO and BET measurements of all spent samples were conducted to get a deep insight into the negative effects of binder addition, and the results suggest that the binder additives functioned mainly to enhance the polyaromatization of formed aromatics to coke on their external surfaces and consequently lower the catalysts＇ benzene formation activity and selectivity.

关键词： methane dehydroaromatization Mo/HZSM-5 binder coke formation

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Development and characterization of 43 microsatellite markers for the critically endangered primrose Primula reinii using MiSeq sequencing

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Plant Diversity 2018年第1期40卷 41-44页

作者： Masaya yamamoto Yoshihiro Handa Hiroki Aihara Hiroaki Setoguchi Graduate School of Human and Environmental Studies Kyoto University FASMAC Co. Ltd.

Primula reinii(Primulaceae), a perennial herb belonging to the Primula section Reinii, occurs on wet,shaded rocky cliffs in the mountains of Japan. This threatened species comprises four varieties; these plants are very localized and rare in the wild. In this study, 43 microsatellite markers were developed using MiSeq sequencing to facilitate conservation genetics of these critically endangered primroses. We developed novel microsatellite markers for three varieties of P. reinii, and tested its polymorphism and genetic diversity using natural populations. These novel markers displayed relatively high polymorphism; the number of alleles and expected heterozygosities ranged from 2 to 6(mean = 3.2) and 0.13 to 0.82(mean = 0.45), respectively. All loci were in Hardye Weinberg equilibrium. These microsatellite markers will be powerful tools to assess P. reinii genetic diversity and develop effective conservation and management strategies.

关键词： Microsatellites Polymorphism MiSeq Critically endangered plant Primula reinii

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Gas Absorption by Wavy Falling Liquid Film Formed on Inner Surface of Vertical lubes

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Journal of Thermal Science 2003年第1期12卷 57-61页

作者： Akio Miyara Tomoki yamamoto Toru Iemura Takashi Shimada Department of Mechanical Engineering Saga UniversityGraduate School of Science and Engineering Saga UniversityGraduate School of Science and Engineering Saga UniversityGraduate School of Science and Engineering Saga University 1 Honjomachi Saga-shi 840-8502 Japan 1 Honjomachi Saga-shi 840-8502 Japan1 Honjomachi Saga-shi 840-8502 Japan1 Honjomachi Saga-shi 840-8502 Japan

An experimental study on gas absorption into falling liquid film formed on inner surface of vertical tubes has been carried out in order to clarify fundamental characteristics of the gas absorption and enhancement by surface waves. The water supplied into the test tubes is periodically disturbed by fluctuating a silicon tube before the test section with a speaker and the wavy films absorb the oxygen filled in the tubes. Imposing the periodic disturbance enhances the gas absorption and the enhancement has a maximum at around 20-30 Hz, where the gas absorption is 20-30% higher. Mass transfer coefficients obtained with five tubes agree well with those obtained with single tube. Two-dimensional numerical simulations have also been conducted for gas absorption by wavy film and the enhancement mechanism of the gas absorption is discussed.

关键词： falling liquid film gas absorption surface wave vertical tube mass transfer enhancement.

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Photodimerization and photooxygenation of 9-vinylcarbazole catalyzed by titanium dioxide and magnesium perchlorate

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Chinese Chemical Letters 2010年第3期21卷 365-368页

作者： Hajime Maeda Mio yamamoto Hideyuki Nakagawa Kazuhiko Mizuno Division of Material Sciences Graduate School of Natural Science and TechnologyKanazawa University Department of Applied Chemistry Graduate School of EngineeringOsaka Prefecture University

Photoreaction of 9-vinylcarbazole in acetonitrile in the presence of titanium dioxide and a catalytic amount of magnesium perchlorate gave 3,6-di(9-carbazolyl)-1,2-dioxane as a photooxygenated product via photodimerization of *** photoreaction proceeds via an electron transfer mechanism,where magnesium perchlorate accelerated formation of the photo-oxygenated product.

关键词： Titanium dioxide Magnesium perchlorate 9-Vinylcarbazole Photooxygenation Photodimerization

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Experimental Study of the Flow in Helical Circular Pipes:Torsion Effect on the Flow Velocity and Turbulence

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Journal of Thermal Science 2008年第3期17卷 193-198页

作者： Yasutaka HAYAMIZU Kyoji yamamoto ShinichiroYANASE Toru HYAKUTAKE Toru SHINOHARA Shinichi MORITA Department of Mechanical Engineering Yonago National College of Technology Graduate School of Natural Science and Technology Okayama University

An objective of the present paper is to experimentally clarify the torsion effect on the flow in helical circular pipes. We have made six helical circular pipes having different pitches and common non-dimensional curvature δ of about 0.1. The torsion parameter β0, which is defined by β0 = τ/（2δ）1/2 with non-dimensional torsion r, are taken to be 0.02, 0.45, 0.69, 1.01, 1.38 and 1.89 covering from small to very large pitch. The velocity distributions and the turbulence of the flow are measured using an X-type hot-wire anemometer in the range of the Reynolds number from 200 to 20000. The results obtained are summarized as follows： The mean secondary flow pattern in a cross section of the pipe changes from an ordinary twin-vortex type as is seen in a curved pipe without torsion （toroidal pipe） to a single vortex type after one of the twin-vortex gradually disappears as β0 increases. The circulation direction of the single vortex is the same as the direction of torsion of the pipe. The mean velocity distribution of the axial flow is similar to that of the toroidal pipe at small β0, but changes its shape as β0 increases, and attains the shape similar to that in a straight circular pipe when ,β0 = 1.89. It is also found that the critical Reynolds number, at which the flow shows a marginal behavior to turbulence, decreases as ,β0 increases for small ,β0, and then increases after taking a minimum at ,β0 ≈ 1.4 as ,β0 increases. The minimum of the critical Reynolds number experimentally obtained is about 400 at ,β0 ≈ 1.4.

关键词： Helical Circular Pipe Torsion Effect Critical Reynolds Number Turbulence

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Pulsed Laser Deposition of VO_(2)Single Crystal Thin Films on Sapphire Substrates

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Chinese Physics Letters 1998年第12期15卷 904-906页

作者： ZHU Pei-ran S.yamamoto A.Miyashita H.Naramoto Institute of Physics Chinese Academy of SciencesBeijing 100080 Department of Materials Development Japan Atom Energy Research InstituteWatanuki 1233TakasakiGumma 370-12Japan

Thin films of VO_(2)single-crystalline on(0001)sapphire substrates have been prepared by visible pulsed laser ablation *** crystal quality and properties of the films are evaluated through electrical resistance measurement,x-ray diffraction(XRD),and Rutherford-backscattering spectroscopy/channeling(RBS/C)*** dependence of the surface electrical resistance of the films on the temperature shows semiconductor-to-metal transitions with the resistance change of 7×10^(3)-2×10^(4).The hysteresis widths are from less than 1 to 3 *** and RBS/C data reveal that the films prepared in particular conditions are single-crystalline VO_(2)with the(010)planes parallel to the surface of the sapphire substrate.

关键词： technique. sapphire Crystal

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Dry Machining Tool Design via Chlorine Ion Implantation

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材料热处理学报 2004年第05B期25卷 879-882页

作者： Tatsuhiko Aizawa Atsushi Mitsuo Shigeo yamamoto Shinji Muraishi Taro Sumitomo Center for Collaborate Research University of Tokyo Tokyo JapanTokyo Metropolitan Industrial Research Institute Tokyo JapanTokyo Metropolitan Industrial Research Institute Tokyo JapanDepartment of Materials Science Technology Tokyo Institute of Technology Tokyo JapanCenter for Collaborate Research University of Tokyo Tokyo Japan

Dry machining has become a key issue to significantly reduce the wastes of used lubricants and cleaning agents and to improve the environmental consciousness for medical and food applications of special tooling. Since the tools and metallic works are in direct contact in dry, severe adhesive wear and oxidation are thought to occur even at the presence of hard protective coatings. Self-lubrication mechanism with use of lubricous oxide films is found to be effective for dry machining. Through the chlorine ion implantation to tools, titanium base oxides are in-situ formed on the tool surface. This oxide deforms elasto-plastically so that both friction coefficient and wear volume are reduced even in the high-speed cutting.

关键词：氯离子注入自动润滑 TiN涂层 TiCN涂层干机械加工

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Unique Continuation Property with Partial Information for Two-Dimensional Anisotropic Elasticity Systems

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Acta Mathematicae Applicatae Sinica 2020年第1期36卷 3-17页

作者： Jin CHENG Yi-kan LIU Yan-bo WANG Masahiro yamamoto School of Mathematical Sciences Fudan UniversityShanghai 200433China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China Research Institute for Electronic Science Hokkaido UniversitySapporo 060-0812Japan Graduate School of Mathematical Sciences The University of TokyoTokyo 153-8914Japan Academy of Romanian Scientists 54 Splaiul Independentei StreetBucharest 050094Romania Peoples’Friendship University of Russia(RUDN University Moscow 117198Russia

In this paper,we establish a novel unique continuation property for two-dimensional anisotropic elasticity systems with partial *** precisely,given a homogeneous elasticity system in a connected open bounded domain,we investigate the unique continuation by assuming only the vanishing of one component of the solution in a *** the corresponding Riemann function,we prove that the solution vanishes in the whole domain provided that the other component vanishes at one point up to its second ***,we construct several examples showing the possibility of further reducing the additional information of the other *** result possesses remarkable significance in both theoretical and practical aspects because the required data are almost halved for the unique determination of the whole solution.

关键词： anisotropic elasticity system unique continuation,Riemann function

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