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Correlation between Mineral Intake and Urinary Excretion in Free-Living Japanese Young Women

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A dispersed vegetative cover contributes to urban biodiversity:plant diversity across land use types and scale in an Asian city

Food and Nutrition Sciences 2012年第1期

作者： Munehiro Yoshida Tsutomu Fukuwatari Junya Sakai Tomiko Tsuji katsumi shibata

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Journal of Forestry Research 2023年第2期34卷 539-551页

作者： Jiefeng Kang Shozo shibata Laboratory of Landscape Ecology and Planning Graduate School of Global Environmental StudiesKyoto UniversityKyotoJapan

Urbanization provides both challenges and opportunities for biodiversity conservation,but patterns of urban plant diversity across land uses,especially in Asian countries,remains *** determine these patterns of diversity,woody plants in 174 sample quadrats across various land use types in Kyoto City were ***,abundance,and evenness were evaluated at city,land use,and quadrat scales,and biodiversity of different land use types was *** the city level,223 species in 77 families were *** the land use level,residential areas had the highest total biological richness,with moderate to low evenness,while commercial areas exhibited low *** the quadrat level,the low-rise residential area had higher species richness than the other land *** abundance and evenness in quadrats were significantly different across land use types for the canopy layer but not for the *** results provide insights into urban biodiversity design and management by identifying prior land uses for biodiversity improvement and by highlighting the contribution of residential private *** heterogeneity,scale,and multidimensionality should be considered when measuring urban biodiversity.

关键词： Urban biodiversity Woody plants Land uses Residential areas Japan

Implications of Transient Receptor Potential Cation Channels in Migraine Pathophysiology

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Neuroscience Bulletin 2021年第1期37卷 103-116页

作者： Mamoru shibata Chunhua Tang Department of Neurology Keio University School of MedicineTokyo 160-8582Japan Department of Neurology Tokyo Dental College Ichikawa General HospitalChiba 272-8513Japan Department of Neurology and Center for Clinical Neuroscience Daping HospitalThird Military Medical UniversityChongqing 400042China

Migraine is a common and debilitating headache disorder. Although its pathogenesis remains elusive,abnormal trigeminal and central nervous system activity is likely to play an important role. Transient receptor potential(TRP) channels, which transduce noxious stimuli into pain signals, are expressed in trigeminal ganglion neurons and brain regions closely associated with the pathophysiology of migraine. In the trigeminal ganglion,TRP channels co-localize with calcitonin gene-related peptide, a neuropeptide crucially implicated in migraine pathophysiology. Many preclinical and clinical data support the roles of TRP channels in migraine. In particular,activation of TRP cation channel V1 has been shown to regulate calcitonin gene-related peptide release from trigeminal nerves. Intriguingly, several effective antimigraine therapies, including botulinum neurotoxin type A, affect the functions of TRP cation channels. Here, we discuss currently available data regarding the roles of major TRP cation channels in the pathophysiology of migraine and the therapeutic applicability thereof.

关键词： Migraine TRPV1 TRPM8 TRPA1 TRPV4 Calcitonin gene-related peptide Trigeminal ganglion Neurogenic inflammation

Identification of Heat Transfer Coefficients by Use Conditions of Quenching Oil

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材料热处理学报 2004年第5期25卷 453-456页

作者： katsumi Ichitani Lubricants Research Laboratory Idemitsu Kosan Co. Ltd. Chiba Japan

Heat transfer coefficients of the quench medium are necessary for heat-treatment simulation. Cooling characteristics of quenching oil vary with kinds and usage greatly. Users are selecting oil solutions that come up to their desired hardness and quenching distortion requirements. In particular cooling performance rises by agitation and decompression. Therefore we identified a heat transfer coefficient by usage and kinds of quenching oil. Cooling characteristics are different greatly by a kind of quenching oil. A difference of a cooling characteristic by a kind of oil depends on a temperature range of a boiling stage and the maximum heat transfer coefficient mainly. On the other hand, in a convection stage, there are few changes in a boiling stage. Even if quenching oil temperature is changed, heat transfer coefficients do not change greatly. When quenching oil stirred, heat transfer coefficients of vapor blanket stage and a convection stage rise, but there are a few changes in a boiling stage. When quenching oil is decompressed a temperature range of a high heat transfer coefficient moves to the low temperature side. In addition, a heat transfer coefficient in a vapor blanket stage comes down. For precision improvement of heat-treatment simulation, it is important that the heat transfer coefficient is calculated in conformity to the on-site use reality.

关键词：传热系数淬火油热处理冷却曲线

Oxidation of antimony (Ⅲ) in soil by manganese (Ⅳ) oxide using X-ray absorption fine structure

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Journal of Environmental Sciences 2018年第11期30卷 31-37页

作者： Lei Fu katsumi Shozugawa Motoyuki Matsuo Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro-ku Tokyo 153-8902 Japan

The oxidation of antimony （Ⅲ） in soils was studied using X-ray absorption fine structure （XAFS） spectra. An andosol soft sample and artificial soil samples （SiO2 blended with iron （Ⅲ） hydroxide and manganese （Ⅳ） oxide） were used herein. After adding antimony （Ⅲ） oxide to all soil samples, the oxidation process was observed by recording the XAFS spectra of Sb K-edge, Fe Kedge, and Mn K-edge. The results indicated that manganese （Ⅳ） oxide played an important role in the oxidation of Sb（Ⅲ）; however iron （Ⅲ） hydroxide was not directly related to the reaction. During a 2-hr continuous Sb K-edge X-ray absorption near edge structure （XANES） measurement with an interval of I rain of one of the artificial soil samples （SiO2 ＋ MnO2 ＋ Sb2O3）, a pseudo-first-order reaction was determined with an average estimated rate of 0.52 ±0.04 hr-1. Compared to the lower oxidation rate of andosol, it is suggested that because of the low concentration of Mn（Ⅳ） in natural soils, the oxidation process of Sb（Ⅲ） might be relatively slow and require more time to convert Sb（Ⅲ） to Sb（V）.

关键词： Soil Antimony Oxidation Manganese (Ⅳ) oxide X-ray absorption fine structure (XAFS)

Three-dimensional crystal defect imaging by STEM depth sectioning

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Chinese Physics B 2024年第8期33卷 2-7页

作者： Ryo Ishikawa Naoya shibata Yuichi Ikuhara Institute of Engineering Innovation The University of TokyoBunkyoTokyo 113-8656Japan

One of the major innovations awaiting in electron microscopy is full three-dimensional imaging at atomic *** the success of aberration correction to deep sub-angstrom lateral resolution,spatial resolution in depth is still far from atomic *** scanning transmission electron microscopy(STEM),this poor depth resolution is due to the limitation of the illumination *** overcome this physical limitation,it is essential to implement a next-generation aberration corrector in STEM that can significantly improve the depth *** review discusses the capability of depth sectioning for three-dimensional imaging combined with large-angle illumination ***,the statistical analysis approach remarkably improves the depth resolution,making it possible to achieve three-dimensional atomic resolution imaging at oxide *** will also discuss the future prospects of three-dimensional imaging at atomic resolution by STEM depth sectioning.

关键词： atomic-resolution STEM STEM depth sectioning depth resolution dopants surface topography

Wavefront control of subcycle vortex pulses via carrier-envelope-phase tailoring

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Light(Science & Applications) 2023年第12期12卷 2711-2722页

作者： Yu-Chieh Lin katsumi Midorikawa Yasuo Nabekawa Attosecond Science Research Team RIKEN Center for Advanced Photonics2-1 HirosawaWakoSaitama 351-0198Japan

The carrier-envelope phase(CEP)of an ultrashort laser pulse is becoming more crucial to specify the temporal characteristic of the pulse's electric field when the pulse duration becomes shorter and attains the subcycle regime;here,the pulse duration of the intensity envelope is shorter than one cycle period of the carrier field *** this subcycle pulse involves a structured wavefront as is contained in an optical vortex(OV)pulse,the CEP has an impact on not only the temporal but also the spatial characteristics owing to the spatiotemporal coupling in the structured optical ***,the direct observation of the spatial effect of the CEP control has not yet been *** this study,we report on the measurement and control of the spatial wavefront of a subcycle OV pulse by adjusting the *** generate subcycle OV pulses,an optical parametric amplifier delivering subcycle Gaussian pulses and a Sagnac interferometer as a mode converter were integrated and provided an adequate spectral *** pulse duration of the generated OV pulse was 4.7 fs at a carrier wavelength of 1.54μ*** confirm the wavefront control with the alteration of the CEP,we developed a novel f-2f interferometer that exhibited spiral fringes originating from the spatial interference between the subcycle OV pulse and the second harmonic of the subcycle Gaussian pulse producing a parabolic wavefront as a reference;this resulted in the successful observation of the rotation of spiral interference fringes during CEP manipulation.

关键词： interferometer amplifier cycle

Determination of ammonium on an integrated microchip with LED-induced fluorescence detection

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Journal of Environmental Sciences 2012年第3期24卷 564-570页

作者： Shuhua Xue katsumi Uchiyama Hai-fang Li Department of Chemistry Tsinghua UniversityBeijing 100084China College of Chemistry and Chemical Engineering Fuzhou UniversityFuzhou 350108China Department of Applied Chemistry Graduate School of Urban Environmental SciencesTokyo Metropolitan UniversityMinamiohsawaHachiojiTokyo 192-0364Japan

A simply fabricated microfluidic device integrated with a fluorescence detection system has been developed for on-line determination of ammonium in aqueous samples. A 365-nm light-emitting diode （LED） as an excitation source and a minor band pass filter were mounted into a polydimethylsiloxane （PDMS）-based microchip for the purpose of miniaturization of the entire analytical system. The ammonium sample reacted with o-phthaldialdehyde （OPA） on-chip with sodium sulfite as reducing reagent to produce a fluorescent isoindole derivative, which can emit fluorescence signal at about 425 nm when excited at 365 nm. Effects of pH, flow rate of solutions, concentrations of OPA-reagent, phosphate and sulfite salt were investigated. The calibration curve of ammonium in the range of 0.018- 1.8 μg/mL showed a good linear relationship with R2 = 0.9985, and the detection limit was （S /N = 3） 3.6 × 10 4 μg/mL. The relative standard deviation was 2.8% （n = 11） by calculating at 0.18 μg/mL ammonium for repeated detection. The system was applied to determine the ammonium concentration in rain and river waters, even extent to other analytes fluorescence detection by the presented device.

关键词： microfluidic chip light emitting diode o-phthaldialdehyde fluorescence ammonium

Spatial distributions of the leafminer Ophiomyia maura （Diptera： Agromyzidae） in host plant Aster ageratoides

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Insect Science 2008年第4期15卷 343-348页

作者： Yoshiko Ayabe Ei'ichi shibata Laboratory of Forest Protection Graduate School of Bioagricultural Sciences Nagoya University Nagoya 464-8601 Japan

The seasonal occurrence and among-plant and within-plant spatial distribution of the multivoltine leafminer Ophiomyia maura Meigen （Diptera： Agromyzidae） on the herbaceous plant Aster ageratoides Turcz. subsp, ovatus （Asteraceae） were investigated in the field. O. maura has at least four generations a year and mines per leaf fluctuate with a mean of 0.007 throughout the occurrence period. Seasonal occurrence is associated with abundance of new host leaves, suggesting O. maura females prefer to oviposit in newly emerged leaves. The among-plant distribution of O. maura is described by a Poisson distribution early in the season but tends to be weakly clumped later. The within-plant vertical distribution of larval mines increased from middle to upper leaves during plant development, because mined leaves in the middle position early in the season move downward with the emergence of new leaves, shifting mined leaves from the position where O. maura oviposits eggs. Later in the season, mined leaves remain where they are deposited because few new leaves emerge. The spatial distribution of O. maura, resource utilization patterns, and host plant characteristics are discussed.

关键词： host-plant interactions resource utilization seasonal occurrence spatialdistribution