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Control of Collection Efficiency for Axial Flow Cyclone Dust Collectors with Fixed Guide Vanes and with Funnel Shaped Exit Pipes

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Journal of Thermal Science 2006年第3期15卷 240-250页

作者： Akira Ogawa masaru Arakawa T-110-0011 Minowa 2-14-7Taitou-KuTokyoJapan SHINWA RULES Co. Ltd.Sanjo-ShiNiigataJapan

The experimental result of the collection efficiency of the axial flow cyclone with the fixed guide vanes is lower than that with the tangential inlet pipe to the cyclone body due to the weak angular momentum transfer given by flowing through the guide vanes. However, one of the interesting points is the control of the collection efficiency depended on the funnel shaped exit pipes. The collection efficiencies for these funnel shaped exit pipes are depended on the Froude number. Then, in this paper, the experimental results of the pressure drop and also the collection efficiency using the fly-ash particles and also the comparison of the calculated results of the collection efficiency with the experimental results are described i~ detail.

关键词： Axial flow cyclone funnel shaped exit pipe fixed guide vanes pressure drop collection efficiency,Froude number cut-Size

Mechanisms of fertilization elucidated by gene-manipulated animals

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Asian Journal of Andrology 2015年第4期17卷 646-652页

作者： masaru Okabe Center for Genetic Analysis for Biological ResponsesResearch Institute for Microbial Diseases OsakaUniversity Yamadaoka 3-1 Suita Osaka 565-0871Japan.

Capacitation and the acrosome reaction are key phenomena in mammalian fertilization. These phenomena were found more than 60 years ago. However, fundamental questions regarding the nature of capacitation and the timing of the acrosome reaction remain unsolved. Factors were postulated overtime, but as their roles were not verified by gene-disruption experiments, widely accepted notions concemingthe mechanism of fertilization are facing modifications. Today, although in vitro fertilization systems remain our central research tool, the importance of in vivo observations must be revisited. Here, primarily focusing on our own research, I summarize how in vivo observations using gene-manipulated animals have elucidated new concepts in the mechanisms of fertilization.

关键词： Mechanisms fertilization gene-manipulated

Photocatalytic dry reforming of methane by rhodium supported monoclinic TiO_(2)-B nanobelts

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Journal of Energy Chemistry 2022年第8期31卷 562-571,I0015页

作者： masaru Kushida Akira Yamaguchi Masahiro Miyauchi School of Materials and Chemical Technology Tokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo 152-8552Japan

The conversion of methane and carbon dioxide into syngas(dry reforming of methane;DRM)has attracted attention owing to the potential to reuse greenhouse *** dioxide(TiO_(2))-based photocatalysts,which have been widely commercialized owing to their high efficiency,non-toxicity,and low cost,are strongly desired in ***,we report a monoclinic-phase TiO_(2)-B nanobelts-supported rhodium(Rh/TiO_(2)-B nanobelts)catalyst that efficiently promotes DRM under ultraviolet light irradiation at low *** holes in the TiO_(2)-B nanobelts were used to oxidize methane,while the electrons were trapped in rhodium to reduce carbon ***/TiO_(2)-B nanobelts exhibited considerably higher durability and activity than Rh-loaded conventional TiO_(2)(anatase and rutile),owing to the lattice and/or surface oxygen reactivity in TiO_(2)-B nanobelts,which was suggested by X-ray photoelectron spectroscopy measurements and photocatalytic performance tests under an atmosphere of methane *** study paves the path for the effective utilization of methane by constructing active TiO_(2)-based nanometal photocatalysts.

关键词： Photocatalysis Dry reforming of methane Greenhouse gas conversion Gas-phase reaction Titanium dioxide TiO_(2)-B

Velocity Measurement of Induced Flow by a Laser Focusing Shock Wave

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Journal of Thermal Science 2006年第1期15卷 48-53,26页

作者： Hiroyuki HIRAHARA masaru FUJINAMI Masaaki KAWAHASHI Department of Mechanical Engineering Saitama University 255 Shimo-Okubo Sakura Saitama 338-8570Japan. Graduate School of Science and Engineering Saitama University Japan

The objective of this study is to apply the shock wave for control in a micro channel. The shock wave was generated by a laser focusing of pulsed laser beam in the channel. Using a pulse laser to generate a shock wave, a non-stationary flow was induced in the small space between the parallel plates. The spherical and cylindrical shock propagations were observed with schlieren method. The shock Mach number decreases with time and approaches to unity. As reported in the previous investigations, the shock speed was attenuated in a short distance and time. In the present experiment, It was not found a remarkable difference in the shock speed between the spherical and cylindrical shock experiments. Subsequently, the flow induced by the cylindrical shock wave was studied using PIV technique. A smoke tracer was used in the experiment and its velocity was measured within 100 μs. A numerical simulation was carried out to investigate the momentum relaxation between the gas and smoke particle. A suitable shock initiation model was introduced in the simulation. The experimental results show that a wide acceleration and deceleration zone exist behind the shock wave. Also, the relaxation distance in the experimental data is much longer than that in numerical simulation.

关键词： micro-blast wave laser focusing flow visualization PIV.

Synthesis of Highly ordered Large Size Mesoporous Silica and Effect of Stabilization as Enzyme Supports in Organic Solvent

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Chemical Research in Chinese Universities 2002年第2期18卷 200-205页

作者： LI Bo Inagaki S miyazaki C Takahashi H Toyota Central R&D Labs. Inc.411YokomichiNagakute choAichi 4801192Japan

FSM 16, MCM 41 and SBA 15 types of hexagonal mesoporous silica with a highly ordered 2 dimensional structure were synthesized by using different silicon sources and surfactants. In the 2 dimensional silicate framework, pore size can be uniformly controlled by the combined use of the surfactants having different alkyl chain lengths and the swelling agents(triisopropyl benzene). The pore diameter of FSM 16 and MCM 41 can be expanded to be 10 nm, SBA 15 to be 15 nm. The crystal regularity was decreased with the increase of the pore diameter. In FSM 16 derived from kanemite(silicon source) and MCM 41 from water glass, their anionic characteristics on the pore wall may be stronger than those of SBA 15 derived from oligomeric tetramethoxysilane(TMOS). We have successfully used FSM 16 and MCM 41 to immobilize the enzyme having cationic residues below isoelectric point. The level of adsorption of enzymes in FSM 16 and MCM 41 was relatively high, but was low in SBA 15 support. The mechanism of enzyme to be adsorbed in mesoporous silica was suggested to be the ionic interactions. In aqueous solutions, horseradish peroxidase(HTP) was immobilized in FSM 16 with 8.9 nm mesopores and the highest loading amount(183 mg/mg FSM) was obtained, but for the FSM 16 of pore diameter 30 nm only an amount of 28 mg/mg FSM was obtained. The catalytic activity in the organic solvent was high when HRP was immobilized in FSM 16 and MCM 41, but it was low in case of SBA 15.

关键词： Mesoporous silica Surfactant Swelling agent Enzyme Activity

Identification of county-level health factors associated with COVID-19 mortality in the United States

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The Journal of Biomedical Research 2020年第6期34卷 437-445,I0014页

作者： Wei Pan Yasuo miyazaki Hideyo Tsumura Emi miyazaki Wei Yang School of Nursing Duke UniversityDurhamNC 27710USA Department of Population Health Sciences School of MedicineDuke UniversityDurhamNC 27708USA School of Education Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA School of Community Health Sciences University of NevadaRenoNV 89557USA.

Many studies have investigated causes of COVID-19 and explored safety measures for preventing COVID-19 ***,these studies fell short to address disparities in health status and resources among decentralized communities in the United *** this study,we utilized an advanced modeling technique to examine complex associations of county-level health factors with COVID-19 mortality for all 3141 counties in the United *** results indicated that counties with more uninsured people,more housing problems,more urbanized areas,and longer commute are more likely to have higher COVID-19 *** on the nationwide population-based data,this study also echoed prior research that used local data,and confirmed that county-level sociodemographic factors,such as more Black,Hispanic,and older subpopulations,are attributed to high risk of COVID-19 *** hope that these findings will help set up priorities on high risk communities and subpopulations in future for fighting the novel virus.

关键词： COVID-19 mortality health factors health disparity hierarchical generalized linear model

The mechanism of sperm-egg interaction and the involvement of IZUMO1 in fusion

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Asian Journal of Andrology 2011年第1期13卷 81-87页

作者： Naokazu Inoue Masahito Ikawa masaru Okabe Research Institute for Microbial Diseases Osaka University Yamadaoka 3-1 Suita Osaka 565-0871 Japan

An average human ejaculate contains over 100 million sperm, but only a few succeed in accomplishing the journey to an egg by migration through the female reproductive tract. Among these few sperm, only one participates in fertilization. There might be an ingenious molecular mechanism to ensure that the very best sperm fertilize an egg. However, recent gene disruption experiments in mice have revealed that many factors previously described as important for fertilization are largely dispensable. One could argue that the fertilization mechanism is made robust against gene disruptions. However, this is not likely, as there are already six different gene-disrupted mouse lines （Calmegin, Adam Ia, Adam2, Adam3, Ace and Pgapl）, all of which result in male sterility. The sperm from these animals are known to have defective zona-binding ability and at the same time lose oviduct-migrating ability. Concerning spermzona binding, the widely accepted involvement of sugar moiety on zona pellucida 3 （ZP3） is indicated to be dispensable by gene disruption experiments. Thus, the landscape of the mechanism of fertilization is revolving considerably. In the sperm-egg fusion process, CD9 on egg and IZUMO1 on sperm have emerged as essential factors. This review focuses on the mechanism of fertilization elucidated by gene-manipulated animals.

关键词： egg fusion gene-manipulation interaction IZUMO1 sperm zona pellucida

Efficacy of live attenuated vaccines after two doses of intravenous immunoglobulin for Kawasaki disease

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World Journal of Pediatrics 2022年第10期18卷 706-709页

作者： Yoshihiko Morikawa Hiroshi Sakakibara masaru Miura Clinical Research Support Center Tokyo Metropolitan Children’s Medical Center2-8-29 MusashidaiFuchuTokyo183-8561Japan Department of General Pediatrics Tokyo Metropolitan Children’s Medical CenterTokyoJapan Department of Cardiology Tokyo Metropolitan Children’s Medical CenterTokyoJapan

Kawasaki disease(KD)is a vasculitis of unknown etiology occurring predominantly in children under five years old[1].Coronary artery aneurysm,its most serious complica-tion,occurs in about 25%of untreated patients[2].High-dose intravenous immunoglobulin(IVIG)2 g/kg is used to prevent coronary artery aneurysms[1,3,4],but about 20%of patients are nonresponsive and require a second dose for a total of 4 g/*** appropriate timing of live attenuated vaccine(LAV)administration in such cases is unclear.

关键词： doses attenuated intravenous

Electron transmission and quantum current distribution of C_(70) molecule

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Science China(Physics,Mechanics & Astronomy) 2008年第2期51卷 126-132页

作者： KATSUNORI Tagami3 masaru Tsukada Nano Technology Research Centre 120-5 Waseda University

The characteristics of electron transmission through C70 molecule bridge in which two atomic chain leads are connected to long-axis carbon atoms are investigated theoretically by using tight-binding approach based on the Green's function with only one π orbital electron per carbon atom. Electron transmission through C70 molecule from the input to the output terminal is obtained. From the spectrum, the switching feature of the electron transmission through C70 is found, and the oscil-lation property based on the quantized level is explained. The quantum current distributions inside C70 molecule bridge are calculated and simulated by the quan-tum current density theory based on Fisher-Lee formula at the energy point E = -0.2 eV, where the transmission spectrum shows a peak. The maximum and the mini-mum bond quantum currents are presented, and the reason why the currents are distributed nonuniformly is explained by the phase difference of the atomic orbits. The result shows that the currents at each atomic site agree with Kirchhoff quan-tum current conservation law.

关键词： C70 molecule electron transmission quantum current distribution