Tatsuhisa Kato, Shinzo Suzuki, Kôichi Kikuchi, Yohji Achiba,
... fullerene (La@C82) and scandium fullerene (Sc@C82)Tatsuhisa Kato, Shinzo Suzuki, Koichi Kikuchi, and Yohji AchibaCite this: J. Phys. ...
Tópico(s): Graphene research and applications
1993 - American Chemical Society | The Journal of Physical Chemistry
Masanori Hirose, Noriko OTSUKI, Daisuke Hayano, Hidenori Shinjo, Takehiko Gokan, Tatsuhisa Kashiwase, Kenya Suzuki, Terumasa Sawada,
Because nipple discharge is caused by carcinoma as well as benign disease, identification of intraductal abnormalities with ductography is important. Ductography is an invasive mammographic examination in which contrast material is injected directly into the duct. Failure to cannulate or extravasation may occur. Ductography shows evidence of lesions, such as filling defects, duct obstruction, or wall irregularity, but it does not reveal the lesion itself. Furthermore, ductography produces a two- ...
Tópico(s): Advanced MRI Techniques and Applications
2006 - Japan Society of Magnetic Resonance in Medicine | Magnetic Resonance in Medical Sciences
Inosuke Koyano, Kenichiro Tanaka, Tatsuhisa Kato, Shinzo Suzuki,
An extensive study of charge transfer and chemical (rearrangement) reactions in four-atom ion–molecule systems (AB + CD)+, where each of AB and CD stands for a diatomic molecule, has been performed by selecting vibrational and vibronic states of reactant ions using the 'TESICO' coincidence technique. Systems studied include (H2+ N2)+, (HD + N2)+, (D2+ N2)+, (O2+ H2)+, (NO + H2)+ and (N2+ O2)+, and the reactions starting from both AB++ CD and AB + CD+ have been studied in each system. Some systems show exactly the ...
Tópico(s): Molecular Junctions and Nanostructures
1987 - Royal Society of Chemistry | Faraday Discussions of the Chemical Society
Takeshi Akasaka, Shingo Okubo, Masahiro Kondo, Yutaka Maeda, Takatsugu Wakahara, Tatsuhisa Kato, Toshiyasu Suzuki, Kazunori Yamamoto, Kaoru Kobayashi, Shigeru Nagase,
The second isomer of [email protected]82 ([email protected]82-II) has been isolated by a two-step HPLC method, separately from the known major isomer ([email protected]82-I). Visible and near-IR absorption spectra, as well as cyclic and differential pulse voltammograms show that the characteristic features of [email protected]82-II are significantly different from those of [email protected]82-I. The absorption peaks of [email protected]82-II have blue-shifts and the redox potentials have negative shifts, ...
Tópico(s): Graphene research and applications
2000 - Elsevier BV | Chemical Physics Letters
Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Kôichi Kikuchi, Yohji Achiba,
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical properties of La@C82Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Koichi Kikuchi, and Yohji AchibaCite this: J. ...
Tópico(s): Semiconductor materials and interfaces
1993 - American Chemical Society | Journal of the American Chemical Society
Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Takeshi Akasaka, Kaoru Kobayashi, Shigeru Nagase, Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi,
... Metallofullerene: EPR Study of Diphenylmethano-La@C82 RadicalsToshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Takeshi Akasaka, Kaoru Kobayashi, Shigeru Nagase, Kazunori ...
Tópico(s): Advanced Chemical Physics Studies
1995 - American Chemical Society | Journal of the American Chemical Society
Takeshi Akasaka, Shigeru Nagase, Kaoru Kobayashi, Toshiyasu Suzuki, Tatsuhisa Kato, Kôichi Kikuchi, Yohji Achiba, Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi,
Sowohl photochemisch als auch thermisch gelang die Funktionalisierung des Dimetallofullerens La 2 @C 80 mit einem Disiliran [schematische Darstellung Gl. (a)]. Dagegen wird das Disiliran an Sc 2 @C 84 ähnlich wie an leere Fullerene nur photochemisch addiert. Die thermische Reaktivität von La 2 @C 80 ist auf dessen ausgeprägte Elektronenacceptoreigenschaft zurückzuführen. M = La, Sc; O = Fulleren; Ar = 2,4,6‐(CH 3 ) 3 C 6 H 2 . magnified image
Tópico(s): Molecular Junctions and Nanostructures
1995 - Wiley | Angewandte Chemie
Takeshi Akasaka, Shigeru Nagase, Kaoru Kobayashi, Toshiyasu Suzuki, Tatsuhisa Kato, Kôichi Kikuchi, Yohji Achiba, Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi,
Either photochemical or thermal conditions can be used to functionalize dimetallofullerene La2@C80 with a disilirane [schematic representation in Eq. (a)]. In contrast, addition of the disilirane to Sc2@C84, like the analogous addition to empty fullerenes, proceeds only photochemically. The thermal reactivity of La2@C80 is attributed to its excellent electron-acceptor properties. M = La, Sc; ○ = fullerene; Ar = 2,4,6-(CH3)3C6H2.
Tópico(s): Advanced Chemical Physics Studies
1995 - Wiley | Angewandte Chemie International Edition
Takeshi Akasaka, Shigeru Nagase, Kaoru Kobayashi, Toshiyasu Suzuki, Tatsuhisa Kato, Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi,
T. Akasaka, S. Nagase, K. Kobayashi, T. Suzuki, T. Kato, K. Yamamoto, H. Funasaka and T. Takahashi, J. Chem. Soc., Chem. Commun., 1995, 1343 DOI: 10.1039/C39950001343
Tópico(s): Diamond and Carbon-based Materials Research
1995 - Royal Society of Chemistry | Journal of the Chemical Society Chemical Communications
Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Kôichi Kikuchi, Yasuhiko Nakao, Sinzo Suzuki, Yohji Achiba, Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi,
Cyclic-(CV), differential pulse (DPV), and Osteryoung square wave voltammograms (OSWV) have been performed on the pure fullerenolanthanides, two [email protected]82 isomers and [email protected]82, for the first time. Five reversible reduction and one reversible oxidation processes were observed for [email protected]82-A (major isomer). The first oxidation potential is approximately equal to that of ferrocene, indicating that [email protected]82-A is a good electron donor. The CV of [email protected]82- ...
Tópico(s): Synthesis and Properties of Aromatic Compounds
1995 - Elsevier BV | Synthetic Metals
Inosuke Koyano, Kenichiro Tanaka, Tatsuhisa Kato, Shinzo Suzuki, Eiji Ishiguro,
An apparatus designed for the study of state selected ion-molecule reactions using synchrotron radiation as a light source is described. It has been installed in the UVSOR storage ring in Okazaki. Emphasis is placed on the new features of the system, including optical layout, nonline-of-sight steradiancy analyzer for threshold electrons, and dodecapole ion beam guide as a reaction chamber.
Tópico(s): Various Chemistry Research Topics
1986 - Elsevier BV | Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Ko Suzuki, Jan J. Enghild, T. Morodomi, Guy S. Salvesen, Hideaki Nagase,
... tissue procollagenase by matrix metalloproteinase 3 (stromelysin)Ko Suzuki, Jan J. Enghild, Tatsuhisa Morodomi, Guy Salvesen, and Hideaki NagaseCite this: Biochemistry ...
Tópico(s): Coagulation, Bradykinin, Polyphosphates, and Angioedema
1990 - American Chemical Society | Biochemistry
Satoshi Itasaka, Kotaro Shiratori, Tatsuhisa Takahashi, Makoto Ishikawa, Kyosuke Kaneko, Yu Suzuki,
The effects of distension on epithelial transport were examined by increasing intraluminal pressure in the rat distal colon in vitro. Two kinds of preparation, one with the musculature intact (intact preparation) and the other with the musculature and the myenteric neurons detached (mucosa-submucosa preparation), were used and the transmural potential difference (PD) changes were measured. In the intact preparation, distension with a luminal pressure of 15 cmH2O for 15 s caused a transient increase ...
Tópico(s): Urinary Bladder and Prostate Research
1992 - American Physiological Society | AJP Gastrointestinal and Liver Physiology
Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Kôichi Kikuchi, Yasuhiko Nakao, Yohji Achiba, Kaoru Kobayashi, Shigeru Nagase,
... 305 (Japan), Telefax: Int. + 298/56-6136 Toshiyasu Suzuki, Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305 (Japan), Telefax: Int. + 298/56-6136 Shigeru Nagase, Department of Chemistry, Faculty of Education, Yokohama National University, Yokohama 240 (Japan)Search for more papers by this authorProf. Yusei Maruyama, Prof. Yusei Maruyama Institute for Molecular Science, Okazaki (Japan)Search for more papers by this authorProf. Tatsuhisa Kato, Prof. Tatsuhisa Kato Institute for Molecular Science, ...
Tópico(s): Boron and Carbon Nanomaterials Research
1995 - Wiley | Angewandte Chemie
Toshiyasu Suzuki, Yusei Maruyama, Tatsuhisa Kato, Kôichi Kikuchi, Yasuhiko Nakao, Yohji Achiba, Kaoru Kobayashi, Shigeru Nagase,
La2@C80 is a stronger electron acceptor than [email protected]82 and has a remarkably narrow HOMOLUMO gap in comparision to empty fullerenes. This result was derived from the redox potentials of La2@C80 determined by electrochemistry. Ab initio calculations on La2@C80 with an Ih-symmetric C80 cage (see picture on the right) suggest that the partially filled HOMOs are occupied by six electrons from La2. The LaLa distance is 3.45 Å.
Tópico(s): Boron and Carbon Nanomaterials Research
1995 - Wiley | Angewandte Chemie International Edition
Shinzo Suzuki, Satoshi Kawata, H. Shiromaru, Kotaro Yamauchi, Kôichi Kikuchi, Tatsuhisa Kato, Yohji Achiba,
... M@C82 (M = Sc, Y, and La)Shinzo Suzuki, Satoshi Kawata, Haruo Shiromaru, Kotaro Yamauchi, Koichi Kikuchi, Tatsuhisa Kato, and Yohji AchibaCite this: J. Phys. Chem. ...
Tópico(s): Graphene research and applications
1992 - American Chemical Society | The Journal of Physical Chemistry
Tatsuhisa Hasegawa, Masayuki Yamashita, Toshihiro Suzuki, Yasuo Hisa, Yoshiro Wada,
Tópico(s): Glaucoma and retinal disorders
2009 - Springer Science+Business Media | Experimental Brain Research
Kiyoshi Ikeda, Tatsuhisa Kato, Takehisa Suzuki, Kazuo Achiwa,
Lipase-catalyzed enzymatic hydrolysis of dimethyl esters of 1, 4-dihydropyridines to the monoester, which is an important intermediate for the synthesis of optically active 1, 4-dihydropyridines, does not proceed directly. This paper describes the design and synthesis of novel haptens having a phosphonate group containing the requisite oxyanionic character to mimic the tetrahedral intermediate of hydrolysis, and the application of these compounds for generating antibodies with catalytic ability ...
Tópico(s): Synthetic Organic Chemistry Methods
1998 - Pharmaceutical Society of Japan | Chemical and Pharmaceutical Bulletin
Toshihiro Suzuki, Fumiaki Nin, Tatsuhisa Hasegawa, Masakatsu Taki, Hirofumi Sakaguchi, Satoshi Yamamoto, Yasuo Hisa,
We report here the case of a 7-month-old boy with congenital cholesteatomas in the tympanic membrane. A large mass was found occluding most of the inferior half of the tympanic membrane, with a small mass just posterior to the malleus handle. The cholesteatomas were removed via an endaural approach without violating the integrity of the tympanic membrane. Our patient is probably the youngest reported with congenital cholesteatomas in the tympanic membrane. The importance of early diagnosis of congenital ...
Tópico(s): Congenital Ear and Nasal Anomalies
2007 - Elsevier BV | International Journal of Pediatric Otorhinolaryngology Extra
Tatsuhisa Kato, Takeshi Kodama, Tadamasa Shida, Takashi Nakagawa, Yoko Matsui, Shinzo Suzuki, H. Shiromaru, Kotaro Yamauchi, Yohji Achiba,
The electronic absorption spectra of the radical ions in the title are observed in γ-irradiated glassy polyatomic matrices at 77 K. The spectral features of all the radical ions are consistent with the available information in the literature which includes photoelectron and resonance Raman spectra of C60 and C70. In addition, the observed spectra compare favorably with the results of CNDO/S calculations.
Tópico(s): Polymer Nanocomposite Synthesis and Irradiation
1991 - Elsevier BV | Chemical Physics Letters
Masakatsu Taki, Fumiaki Nin, Tatsuhisa Hasegawa, Hirofumi Sakaguchi, Satoshi Yamamoto, Toshihiro Suzuki, Yasuo Hisa,
We report two cases of spontaneous intracranial hypotension (SIH) that presented with orthostatic hearing impairment. Pure tone audiometry in case 1 and distortion-produced otoacoustic emissions (DPOAEs) in case 2 clearly revealed orthostatic low-frequency hearing impairment. The symptoms resolved with conservative therapy in case 1, but they did not resolve completely after three treatments with epidural blood patch in case 2. The orthostatic changes at low-frequency that were present in both examinations ...
Tópico(s): Intracerebral and Subarachnoid Hemorrhage Research
2008 - Elsevier BV | Auris Nasus Larynx
Tatsuhisa Tsuboi, Reina Yamazaki, Risa Nobuta, Ken Ikeuchi, Shiho Makino, Ayumi Ohtaki, Yutaka Suzuki, Tohru Yoshihisa, Christopher Trotta, Toshifumi Inada,
The tRNA splicing endonuclease (Sen) complex is located on the mitochondrial outer membrane and splices precursor tRNAs in Saccharomyces cerevisiae. Here, we demonstrate that the Sen complex cleaves the mitochondria-localized mRNA encoding Cbp1 (cytochrome b mRNA processing 1). Endonucleolytic cleavage of this mRNA required two cis-elements: the mitochondrial targeting signal and the stem-loop 652-726-nt region. Mitochondrial localization of the Sen complex was required for cleavage of the CBP1 mRNA, ...
Tópico(s): RNA and protein synthesis mechanisms
2015 - Elsevier BV | Journal of Biological Chemistry
Tatsuhisa Kato, Takeshi Akasaka, Kaoru Kobayashi, Shigeru Nagase, Kôichi Kikuchi, Yohji Achiba, Toshiyasu Suzuki, Kazunori Yamamoto,
We describe the first chemical derivation of endohedral metallofullerenes giving the corresponding exohedral adducts. For example, mass spectrometry and electron paramagnetic resonance (EPR) spectroscopy provide evidence for the formation of chemical derived [email protected]82 with disilirane (disilacyclopropane). An interesting salient feature of [email protected]82 is discovered. Although disilirane does not add thermally onto the empty fullerenes such as c60 and C82, a facile thermal addition to [ ...
Tópico(s): Graphene research and applications
1997 - Elsevier BV | Journal of Physics and Chemistry of Solids
Tatsuhisa Kato, Takeshi Kodama, Munetaka Oyama, Satoshi Okazaki, Tadamasa Shida, Takashi Nakagawa, Yoko Matsui, Shinzo Suzuki, H. Shiromaru, Kotaro Yamauchi, Yohji Achiba,
The ESR and the electronic adsorption spectrum of the radical anion of C60 produced by electrolysis were measured at room temperatures and at 77 K. A singlet ESR spectrum with g=1.999 appeared only at 77 K while the electronic absorption spectrum was observed both at room temperatures and at 77 K. The small value of the g factor was associated with the residual orbital angular momentum. The irregular vibrational structure of the electronic absorption of the radical anion in the frozen matrix band ...
Tópico(s): Carbon Nanotubes in Composites
1991 - Elsevier BV | Chemical Physics Letters
Masakatsu Taki, Fumiaki Nin, Tatsuhisa Hasegawa, Hirofumi Sakaguchi, Toshihiro Suzuki, Yasuo Hisa, Yumiko Azuma, Masanori Nakagawa,
HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP) is characterized by spastic paraparesis in the lower extremities, and urinary disturbance. HAM/TSP has also been less frequently associated with cerebellar syndromes and nystagmus. We report a case of HAM/TSP presenting with cerebellar ataxia and nystagmus. The patient was a 73-year-old woman who was born in southern Japan. At age 41, she developed pain and spasticity in the bilateral lower limbs and gradually progressive gait disturbance. ...
Tópico(s): T-cell and Retrovirus Studies
2010 - Elsevier BV | Auris Nasus Larynx
Michio Yamada, Hiroki Kurihara, Mitsuaki Suzuki, Masayoshi Saito, Zdeněk Slanina, Filip Uhlı́k, Toshihiro Aizawa, Tatsuhisa Kato, Marilyn M. Olmstead, Alan L. Balch, Yutaka Maeda, Shigeru Nagase, Xing Lü, Takeshi Akasaka,
Fullerenyl radicals can be generated by addition of a free radical to a fullerene surface, by nucleophilic addition followed by one-electron oxidation, or by thermal dissociation of singly bonded fullerene dimers. However, fullerenyl radicals are usually very reactive and generally cannot be isolated. On the contrary, we have found that the reactions of the dimetallic endofullerenes, La2@Ih-C80 and La2@D5h-C80, with 3-chloro-5,6-diphenyltriazine resulted in mono-addition of the triazinyl radical ...
Tópico(s): Synthesis and Properties of Aromatic Compounds
2014 - American Chemical Society | Journal of the American Chemical Society
T. Inagaki, Satoshi Takiya, Koji Ikuta, Tatsuhisa Sasaki, Katsuhisa Kato, Akihiro Shimizu, Masahiro Suzuki, Katsumi Kato,
Tópico(s): Alcohol Consumption and Health Effects
1989 - Springer Science+Business Media | Gastroenterologia Japonica
Shinzo Suzuki, Y. Kojima, Yasuhiko Nakao, Tomonari Wakabayashi, Satoshi Kawata, Kôichi Kikuchi, Yohji Achiba, Tatsuhisa Kato,
The existence of non-equivalent Sc trimer was confirmed by ESR measurements after the HPLC separation of a Sc-trimer enriched portion from carbon soot. The newly observed ESR signal consists of well-resolved hyperfine structures reproducible by a non-equivalent Se trimer structure. The observed hyperfine structures and line widths were compared with those of [email protected]82 and Sc3@C82, by which the stabilization of the non-equivalent trimer structure is discussed in terms of the hindered molecular ...
Tópico(s): Carbon Nanotubes in Composites
1994 - Elsevier BV | Chemical Physics Letters
Tatsuhisa Kato, Satoru Suzuki, Kôichi Kikuchi, Yohji Achiba,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Boron and Carbon Nanomaterials Research
1994 - Wiley | ChemInform
Kiyoshi Ikeda, Tatsuhisa Kato, Takashi Suzuki, Kazuo Achiwa,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Asymmetric Synthesis and Catalysis
1998 - Wiley | ChemInform