Takahiro Kumamaru, Yuichiro Hayashi, Nobuko OKAMOTO, Eiji TAO, Yoshinari Yamamoto,
Tópico(s): Electrochemical sensors and biosensors
1966 - Elsevier BV | Analytica Chimica Acta
Yoshinari Yamamoto, Nobuko OKAMOTO, Keyu Tao,
Spectrophotometric methods are proposed for the determination of anions such as perchlorate, nitrate, phthalate and tetraphenylborate. The methods are based on solvent extraction of the ion pairs formed between colored copper(I) chelate cations and the anions, into organic solvents. Perchlorate or tetraphenylborate is easily extracted with the cuproin-copper(I) chelate into chloroform or chlorobenzene, and nitrate with the neocuproin-copper(I) chelate into methylisobutyl ketone. Eithe system can ...
Tópico(s): Chemical Analysis and Environmental Impact
1969 - Elsevier BV | Analytica Chimica Acta
Terufumi Kato, Takashi Seto, Makoto Nishio, Kōichi Goto, Noboru Yamamoto, Isamu Okamoto, Liang Tao, Wei Yu, Tarik Khaznadar, Kosei Tajima, Masahiko Shibata, Akihiro Seki, Nobuyuki Yamamoto,
The phase II JO25567 study compared the efficacy and safety of erlotinib plus bevacizumab vs. erlotinib alone as first-line therapy for advanced epidermal growth factor receptor (EGFR) mutation-positive non-small-cell lung cancer (NSCLC).Our objective is to provide updated analyses of safety and the assessment of manageability of specific adverse events.Patients with stage IIIB/IV or recurrent, non-squamous, EGFR mutation-positive NSCLC were randomized to receive erlotinib plus bevacizumab or erlotinib. ...
Tópico(s): Lung Cancer Diagnosis and Treatment
2017 - Adis, Springer Healthcare | Drug Safety
T. Iguchi, Teruyuki Nakajima, А. Хаин, Kazuo Saito, Toshihiko Takemura, Hajime Okamoto, Tomoaki Nishizawa, Wei-Kuo Tao,
Abstract Numerical weather prediction (NWP) simulations using the Japan Meteorological Agency Nonhydrostatic Model (JMA-NHM) are conducted for three precipitation events observed by shipborne or spaceborne W-band cloud radars. Spectral bin and single-moment bulk cloud microphysics schemes are employed separately for an intercomparative study. A radar product simulator that is compatible with both microphysics schemes is developed to enable a direct comparison between simulation and observation with ...
Tópico(s): Precipitation Measurement and Analysis
2012 - American Meteorological Society | Journal of the Atmospheric Sciences
Takahiro Kumamaru, Eiji TAO, Nobuko OKAMOTO, Yuroku Yamamoto,
Tópico(s): Electrochemical sensors and biosensors
1965 - Oxford University Press | Bulletin of the Chemical Society of Japan
Huiren Tao, Mina Okamoto, Masataka Nishikawa, Hideki Yoshikawa, Akira Myoui,
p38 mitogen-activated protein kinase (MAPK) acts downstream in the signaling pathway that includes receptor activator of NF-κB (RANK), a powerful inducer of osteoclast formation and activation. We investigated the role of p38 MAPK in parathyroid hormone related protein (PTHrP)-induced osteoclastogenesis in vitro and PTHrP-induced bone resorption in vivo. The ability of FR167653 to inhibit osteoclast formation was evaluated by counting the number of tartrate-resistant acid phosphatase positive multinucleated ...
Tópico(s): TGF-β signaling in diseases
2011 - Public Library of Science | PLoS ONE
Shiquan Tao, Yasuaki Okamoto, Takahiro Kumamaru,
Beryllium in aluminium-based alloys and rock samples was determined by inductively coupled plasma atomic emission spectrometry at 313.042 nm using in situ alkylation/vaporization as a sample introduction system. The operating conditions were optimized and the interferences of foreign ions, especially aluminium, were eliminated by adding o-phenanthroline as a chemical modifier. The calibration was linear from the 3σ detection limit of 1.1 pg up to 125 pg of beryllium. The R.S.D. at 10 pg beryllium ( ...
Tópico(s): Analytical chemistry methods development
1995 - Elsevier BV | Analytica Chimica Acta
Yun-Qing Li, Tao Fasheng, Keiko Okamoto, Sakashi Nomura, Takeshi Kaneko, Noboru Mizuno,
The supratrigeminal region (STR), a reticular zone capping the motor trigeminal nucleus (Tm), contains gamma-aminobutyric acid (GABA)ergic and glycinergic neurons which send axons to the contralateral Tm (J. Comp. Neurol. 373 (1996) 498). In the present study we observed that some single synaptic terminals upon Tm motoneurons showed immunoreactivities (IRs) for both glutamic acid decarboxylase (GAD) and glycine transporter 2 (GlyT2). After injecting biotinylated dextran amine (BDA) into the STR, we further ...
Tópico(s): Ion channel regulation and function
2002 - Elsevier BV | Neuroscience Letters
Takahiro Kumamaru, Hidenori Notake, Shiquan Tao, Yasuaki Okamoto,
Tópico(s): Mass Spectrometry Techniques and Applications
1997 - Springer Nature | Analytical Sciences
Yu Wang, Hiroaki Okamoto, Fumio Tsuda, Ryozo Nagayama, Qi‐Min Tao, Shunji Mishiro,
Abstract China has not been extensively investigated for the prevalence of hepatitis C virus (HCV) infection among people with or without liver disease. We analyzed serum from 2,177 liver disease patients from 7 cities in different areas of China. Of 435 acute hepatitis patients, only 11% were positive for HCV RNA, while hepatitis B surface antigen (HBsAg) was detected in 33%. Of 1,668 patients with chronic liver disease, 14% and 74% were positive for HCV RNA and HBsAg, respectively. Nearly 80% of ...
Tópico(s): Hepatitis B Virus Studies
1993 - Wiley | Journal of Medical Virology
Xiong Huang, Tianmeng Wang, Shengnan Miao, Chong Wang, Zhipeng Li, Zhen Lian, Takashi Taniguchi, Kenji Watanabe, Satoshi Okamoto, Di Xiao, Su‐Fei Shi, Yong‐Tao Cui,
The strong electron interactions in the minibands formed in moiré superlattices of van der Waals materials, such as twisted graphene and transition metal dichalcogenides, make such systems a fascinating platform with which to study strongly correlated states1–19. In most systems, the correlated states appear when the moiré lattice is filled by an integer number of electrons per moiré unit cell. Recently, correlated states at fractional fillings of 1/3 and 2/3 holes per moiré unit cell have been ...
Tópico(s): Perovskite Materials and Applications
2021 - Nature Portfolio | Nature Physics
Yuroku Yamamoto, Nobuko OKAMOTO, Eiji TAO,
著者らは無色のアニオンを有色の金属キレートカチオンとともに有機溶媒に抽出し,有機層におけるキレートの吸収スペクトルを測定することによって,当該アニオンを比色定量する方法を系統的に研究しており,本報はその一部である.銅(I)の特異的比色試薬であるクプロインは通常,アミルアルコール溶液を用いて銅(I)を抽出比色する.この場合,クプロインのクロロホルム溶液を使用すると,銅(I)は特殊なアニオンが存在する場合にのみ抽出されることを見いだした.本報は微量のο-フタル酸が水溶液中に存在すると,クプロイン-クロロホルム溶液に銅(I)が抽出され,かつ有機層の紫色(吸収極大550mμ)の強度がο-フタル酸濃度に比例することがわかったので,この現象にもとつくο-フタル酸の吸光光度定壁法を検討したものである.5×10-4Mクプロイン-クロロホルム溶液でpH 4.1において抽出し,550mμの吸光度を試薬ブランクを対照として測定すれば,8×10-6～4×10-5Mで直線関係が得られ,精度よくο-フタル酸を定量できる.イソフタル酸わよびテレフタル酸は10倍モル以下の共存では妨害しない.
Tópico(s): Electrochemical Analysis and Applications
1965 - Japan Society for Analytical Chemistry | BUNSEKI KAGAKU
Shiquan Tao, Yasuaki Okamoto, Takahiro Kumamaru,
Tópico(s): Electrochemical Analysis and Applications
1995 - Springer Nature | Analytical Sciences
Tao Gao, Poul Norby, Hiroshi Okamoto, Helmer Fjellvåg,
Ni-doped titanate Cs(x)Ti(2-x/2)Ni(x/2)O(4) and its protonic derivative H(x)Ti(2-x/2)Ni(x/2)O(4) x xH(2)O (x = 0.7) were synthesized and characterized by means of synchrotron X-ray diffraction, Raman scattering, X-ray photoelectron spectroscopy (XPS), and magnetic measurements. Cs(x)Ti(2-x/2)Ni(x/2)O(4) crystallizes in an orthorhombic structure (space group Immm), consisting of infinite two-dimensional (2D) host layers of the lepidocrocite (gamma-FeOOH) type. The substitution of Ni atoms for Ti in the ...
Tópico(s): Advanced Condensed Matter Physics
2009 - American Chemical Society | Inorganic Chemistry
Wei-Tao Bi, Yasuhiko Sugii, Koji Okamoto, Haruki Madarame,
In this study time-resolved proper orthogonal decomposition (POD) is proposed for the new technique of dynamic (digital) particle image velocimetry (DPIV), and applied to study the coherent structures at the near field of a round jet flow. Time-resolved POD is computed in the radial direction, the axial direction and the temporal domain, in which the turbulence can be easily measured by DPIV. As a result, large-scale vortical structures and their spatial and temporal evolution at the round jet mixing ...
Tópico(s): Combustion and flame dynamics
2003 - IOP Publishing | Measurement Science and Technology
Kazumasa Nishimoto, Yuta Kochi, Katsunori Ikari, Kazuhiko Yamamoto, Akari Suzuki, Kenichi Shimane, Yoshihiko Nakamura, Koichiro Yano, Noriko Iikuni, S. Tsukahara, Naoyuki Kamatani, Hiroshi Okamoto, Hirotaka Kaneko, Yasushi Kawaguchi, Masahiko Hara, Y. Toyama, Takahiko Horiuchi, Kayoko Tao, Koji Yasutomo, Daisuke Hamada, N. Yasui, Hiroshi Inoue, Mitsuo Itakura, Hisashi Yamanaka, Shigeki Momohara,
Objective: The primary aim of this study was to investigate the association of polymorphisms of TRAF1-C5 , a newly identified rheumatoid arthritis (RA) risk locus in Caucasians, with susceptibility to RA and systemic lupus erythematosus (SLE) in Japanese populations. Gene expression levels of TRAF1 and C5 to assess the functional significance of genotypes were also analysed. Methods: A multicentre association study consisting of 4 RA case-control series (4397 cases and 2857 controls) and 3 SLE case-control ...
Tópico(s): Cytokine Signaling Pathways and Interactions
2009 - BMJ | Annals of the Rheumatic Diseases
Shuichi Wakimoto, Haruhiro Hiraka, K. Kudo, D. Okamoto, Terukazu Nishizaki, Kazuhisa Kakurai, Tao Hong, A. Zheludev, J. M. Tranquada, Norio Kobayashi, Kazuyoshi Yamada,
We report electrical resistivity measurements and neutron diffraction studies under magnetic fields of Bi$_{1.75}$Pb$_{0.35}$Sr$_{1.90}$Cu$_{0.91}$Fe$_{0.09}$O$_{6+y}$, in which hole carriers are overdoped. This compound shows short-range incommensurate magnetic correlation with incommensurability $\delta=0.21$, whereas a Fe-free compound shows no magnetic correlation. Resistivity shows an up turn at low temperature in the form of $ln(1/T)$ and shows no superconductivity. We observe reduction of resistivity ...
Tópico(s): Magnetic and transport properties of perovskites and related materials
2010 - American Physical Society | Physical Review B
Yuroku Yamamoto, Nobuko OKAMOTO, Eiji TAO,
水溶液中に微量の硝酸イオソが存在するとき,ネオクプロイソ-銅(I)キレート陽イオンは硝酸イオンとともにメチルイソプチルケトソに抽出されることを見いだした。このとき,有機相の橙黄色(吸収極大456mμ)の強度が水相中の硝酸イオンの濃度に比例することがわかったので,この現象に基づいて硝酸イオンの新しい抽出比色定量法を研究した。基礎的諸条件を検討した結果,pH5.5～6.5の範囲で抽出を行なえば,硝酸イオンの濃度10-6～10-5mol/lの範囲でBeerの法則にしたがうことがわかった。さらに,この方法を諸種の試料について既知のフェノールジスルホン酸法と比較検討したところ,本法は硝酸イオンに対する感度がフェノールジスルホン酸法の約5倍であり,亜硝酸や塩素イオンの共存の影響も少ない点がすぐれていることがわかった。亜硝酸や塩素イオソが大過剰に共存するときはかなりな誤差を与えるので,その除去法についても種々検討した。その結果確立された最適条件で河川水などの実試料の分析について適用したところよい結果を得たので報告する。
Tópico(s): Advanced Chemical Sensor Technologies
1968 - Chemical Society of Japan | Nippon kagaku zassi
Yoko Nishiuchi, Hisato Shima, Yoshio Fukata, Tomohiro Tao, Takuya Okamoto, Norimichi Takamatsu, Kazuyoshi Okada, Jun Minakuchi,
Although hemodialysis-hypersensitivity reactions have various causes, only a few cases of hypersensitivity to acetate dialysate accompanied by fever have been reported. We present the case of a 69-year-old hemodialysis patient who was admitted due to fever after dialysis. He had undergone online hemodiafiltration using acetate-free citrate-containing dialysate. After admission, we switched to acetate-containing bicarbonate dialysate. He was diagnosed with pneumonia and treated with ceftriaxone. ...
Tópico(s): Food Allergy and Anaphylaxis Research
2020 - Springer Science+Business Media | CEN Case Reports
Ken Motokura, Noriaki Fujita, Kohsuke Mori, Tomoo Mizugaki, Kohki Ebitani, Kiyotomi Kaneda,
... Pd catalysts, see: 15aX. Lu, X. Jiang, X. Tao, J. Organomet. Chem. 1988, 344, 109; 15bF. Ozawa, H. Okamoto, S. Kawagishi, S. Yamamoto, T. Minami, M. Yoshifuji, ...
Tópico(s): Chemical Synthesis and Reactions
2006 - Wiley | Angewandte Chemie International Edition
Tao Gao, Poul Norby, Frank Krumeich, Hiroshi Okamoto, Reinhard Nesper, Helmer Fjellvåg,
Mn5O8 nanorods were prepared by a topotactic conversion of γ-MnOOH nanorod precursors in nitrogen at 400 °C. The as-prepared Mn5O8 nanorods crystallized in a monoclinic structure (space group C2/m) with unit cell dimensions a = 10.3784(2) Å, b = 5.7337(7) Å, c = 4.8668(6) Å, and β = 109.491(6)°, having a compositional formula Mn22+Mn34+O8. The structure allowed 18 Raman-active modes (10 Ag + 8 Bg); 10 of these contributions were observed at 262, 300, 391, 429, 475, 533, 576, 615, 647, and 789 cm−1. An intensive ...
Tópico(s): Layered Double Hydroxides Synthesis and Applications
2009 - American Chemical Society | The Journal of Physical Chemistry C
Tao Yan, Makito Kobayashi, Chun-Shi Liang, Takashi Okamoto, Shugo Watabe,
Tópico(s): RNA Research and Splicing
2004 - Elsevier BV | Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology
Tao Yang, Hongtao Zeng, Jian Zhang, Curtis T. Okamoto, Dwight W. Warren, Richard L. Wood, Michael Bachmann, Austin K. Mircheff,
Sjögren's syndrome is a chronic autoimmune disease affecting the lacrimal glands and other epithelia. It has been suggested that acinar cells of the lacrimal glands provoke local autoimmune responses, leading to Sjögren's syndrome when they begin expressing major histocompatibility complex (MHC) class II molecules. We used isopycnic centrifugation and phase partitioning to resolve compartments that participate in traffic between the basolateral membranes and the endomembrane system to test the hypothesis ...
Tópico(s): Glycosylation and Glycoproteins Research
1999 - American Physical Society | AJP Cell Physiology
Tao Yang, Hongtao Zeng, Jian Zhang, Curtis T. Okamoto, Dwight W. Warren, Richard L. Wood, Michael Bachmann, Austin K. Mircheff,
The events that lead to Sjögren's autoimmune processes in the lacrimal gland remain poorly understood. The acinar cell's responses to acute cholinergic stimulation include release of secretory products across the apical plasma membrane (apm) and a number of processes related to traffic between endomembrane compartments and the basal–lateral plasma membranes (blm), such as recruitment of Na,K-ATPase, accelerated recycling, and accelerated transcytosis of secretory IgA. We tested the hypothesis that ...
Tópico(s): Erythrocyte Function and Pathophysiology
1999 - Elsevier BV | Experimental Eye Research
Jun Hee Lee, Jie Ma, Steven Hahn, Huibo Cao, Minseong Lee, Tao Hong, Hyeongeon Lee, Min Sun Yeom, Satoshi Okamoto, Haidong Zhou, M. Matsuda, R. S. Fishman,
Abstract Localized spins and itinerant electrons rarely coexist in geometrically-frustrated spinel lattices. They exhibit a complex interplay between localized spins and itinerant electrons. In this paper, we study the origin of the unusual spin structure of the spinel CoV 2 O 4 , which stands at the crossover from insulating to itinerant behavior using the first principle calculation and neutron diffraction measurement. In contrast to the expected paramagnetism, localized spins supported by enhanced ...
Tópico(s): Multiferroics and related materials
2017 - Nature Portfolio | Scientific Reports
Takahiro Kumamaru, Shiquan Tao, Masayuki Uchida, Yasuaki Okamoto,
Abstract A sample introduction method based on alkylation of the analyte was proposed for introducing trace gallium into inductively coupled plasma for atomic emission spectrometry. By using 10 μl of a sample solution with 15 μl of a 0.9 mol 1-1 solution of ethylmagnesium bromide in tetrahydrofuran as alkylating reagent, a detection limit of 1.9 ng of gallium was obtained and the calibration graph was linear with the amount of gallium up to 100 ng. The relative standard deviation (n = 10) was 2.0% ...
Tópico(s): Mass Spectrometry Techniques and Applications
1994 - Taylor & Francis | Analytical Letters
Sun-Yong Wang, Tao Yan, Chun-Shi Liang, Hideto Fukushima, Shugo Watabe,
... degrees C, intermediate and 30 degrees C-types [Tao, Y., Kobayashi, M., Liang, C.S., Okamoto, T., Watabe, S., 2004. Temperature-dependent expression patterns ...
Tópico(s): Cardiomyopathy and Myosin Studies
2007 - Elsevier BV | Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology
Seiya Oba, Tadashi Hosoya, Miki Amamiya, Takahiro Mitsumura, Daisuke Kawata, Hirokazu Sasaki, Mari Kamiya, Akio Yamamoto, Takahiro Ando, Sho Shimada, Tsuyoshi Shirai, Tsukasa Okamoto, Tomoya Tateishi, Akira Endo, Junichi Aiboshi, Nobuyuki Nosaka, Hideo Yamanouchi, Toyomu Ugawa, Eiki Nagaoka, Keiji Oi, Susumu Tao, Yasuhiro Maejima, Yukië Tanaka, Kousuke Tanimoto, Hiroaki Takeuchi, Shuji Tohda, Akihiro Hirakawa, Tetsuo Sasano, Hirokuni Arai, Yasuhiro Otomo, Yasunari Miyazaki, Shinsuke Yasuda,
Background: Thrombosis is a characteristic complication in coronavirus disease 2019 (COVID-19). Since coagulopathy has been observed over the entire clinical course, thrombosis might be a clue to understanding the specific pathology in COVID-19. Currently, there is limited epidemiological data of COVID-19-associated thrombosis in the Japanese population and none regarding variant strains of SARS-CoV-2. Here, we elucidate the risk factors and the pattern of thrombosis in COVID-19 patients. Methods: ...
Tópico(s): Dermatological and COVID-19 studies
2021 - Frontiers Media | Frontiers in Cardiovascular Medicine
Y. Zhang, Xiaoqiang Tao, Hong‐Ying Gao, Zhen‐Chao Dong, Jian Hou, Takayuki Okamoto,
We use single molecular manipulation to investigate the modulation effect of adsorbed molecules on local plasmon mediated emission (LPME) from the Au surface. Tunneling electron excited luminescence spectra indicate an overall suppression of LPME when an intact or excised CoOEP molecule is inserted into the junction. However, the LPME for the excised molecule is found to be stronger than that of the intact molecule, somewhat unexpected for a slightly larger molecule-substrate separation. We attribute ...
Tópico(s): Plasmonic and Surface Plasmon Research
2009 - American Physical Society | Physical Review B
Iago López‐Fernández, Donato Valli, Chunyun Wang, Subarna Samanta, Takuya Okamoto, Yi‐Teng Huang, Kun Sun, Yang Liu, Vladimir S. Chirvony, A. Patra, Juliette Zito, Luca De Trizio, Deepika Gaur, Hong‐Tao Sun, Zhiguo Xia, Xiaoming Li, Haibo Zeng, Iván Mora‐Seró, Narayan Pradhan, Juan P. Martínez‐Pastor, Peter Müller‐Buschbaum, Vasudevanpillai Biju, Tushar Debnath, Michael Saliba, Elke Debroye, Robert L. Z. Hoye, Ivan Infante, Liberato Manna, Lakshminarayana Polavarapu,
Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, and radiation detectors. The impressive optical and optoelectronic properties, along with the rapid increase in efficiencies of solar cells and LEDs, have greatly attracted researchers across many disciplines. However, most ...
Tópico(s): Chalcogenide Semiconductor Thin Films
2023 - Wiley | Advanced Functional Materials