Works by Sekiguchi, Osamu

Results: 18

Intermediates in the Methanol-to-hydrocarbons (MTH) Reaction: A Gas Phase Study of the Unimolecular Reactivity of Multiply Methylated Benzenium Cations.

Published in:

Catalysis Letters, 2006, v. 109, n. 1/2, p. 25, doi. 10.1007/s10562-006-0052-8

By:

Svelle, Stian;
Bjørgen, Morten;
Kolboe, Stein;
Kuck, Dietmar;
Letzel, Matthias;
Olsbye, Unni;
Sekiguchi, Osamu;
Uggerud, Einar

Publication type:

Article

Unimolecular metastable decompositions of gem-dimethoxyalkanes (RR′C(OCH3)2) upon electron impact. I. Dimethoxymethane and 1,1-dimethoxyethane.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 2000, v. 14, n. 2, p. 61, doi. 10.1002/(SICI)1097-0231(20000130)14:2<61::AID-RCM834>3.0.CO;2-J

By:

Takahashi, Yutaka;
Higuchi, Tetsuo;
Sekiguchi, Osamu;
Fujizuka, Atsuyo;
Nakajima, Satoshi;
Tajima, Susumu

Publication type:

Article

A simple method for characterizing a neutral species lost in a metastable decomposition using a tandem mass spectrum of a naturally abundant isotopic ion containing a 13C atom.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1999, v. 13, n. 17, p. 1770, doi. 10.1002/(SICI)1097-0231(19990915)13:17<1770::AID-RCM705>3.0.CO;2-2

By:

Tajima, Susumu;
Sekiguchi, Osamu;
Kowase, Yukiyasu;
Nakajima, Satoshi

Publication type:

Article

Elimination of difluorocarbene from the molecular ions of α,α,α-Trifluorocresols with a fluorine atom migration in an ion trap mass spectrometer.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1999, v. 13, n. 14, p. 1458, doi. 10.1002/(SICI)1097-0231(19990730)13:14<1458::AID-RCM667>3.0.CO;2-L

By:

Tajima, Susumu;
Takahashi, Shinya;
Sekiguchi, Osamu

Publication type:

Article

A novel fragmentation process in RC+(OCH3)2 ions (R = H, CH3). The transfer of a hydrogen atom and a methyl group.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1999, v. 13, n. 8, p. 669, doi. 10.1002/(SICI)1097-0231(19990430)13:8<669::AID-RCM539>3.0.CO;2-X

By:

Tajima, Susumu;
Fujizuka, Atsuyo;
Sekiguchi, Osamu

Publication type:

Article

Unimolecular hydrogen chloride loss from the molecular ions of chlorophenols. A 'ring-walk' mechanism for a chlorine ion.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1999, v. 13, n. 5, p. 393, doi. 10.1002/(SICI)1097-0231(19990315)13:5<393::AID-RCM498>3.0.CO;2-V

By:

Takahashi, Yutaka;
Higuchi, Tetsuo;
Sekiguchi, Osamu;
Ubukata, Masaaki;
Tajima, Susumu

Publication type:

Article

Solution and Gas-Phase Acidities of all-trans (all-E) Retinoic Acid: An Experimental and Computational Study.

Published in:

Chemistry - A European Journal, 2015, v. 21, n. 31, p. 11238, doi. 10.1002/chem.201500717

By:

Abboud, José ‐ Luis M.;
Koppel, Ilmar A.;
Uggerud, Einar;
Leito, Ivo;
Koppel, Ivar;
Sekiguchi, Osamu;
Kaupmees, Karl;
Saame, Jaan;
Kütt, Karl;
Mishima, Masaaki

Publication type:

Article

Conclusive Evidence for Two Unimolecular Pathways to Zeolite-Catalyzed De-alkylation of the Heptamethylbenzenium Cation.

Published in:

ChemCatChem, 2015, v. 7, n. 24, p. 4143, doi. 10.1002/cctc.201500793

By:

Westgård ErichsEN, Marius;
Mortén, Magnus;
Svelle, Stian;
Sekiguchi, Osamu;
Uggerud, Einar;
Olsbye, Unni

Publication type:

Article

On the Gas-Phase Reactivity of Complexed OH+ with Halogenated Alkanes.

Published in:

Chemistry - A European Journal, 2005, v. 11, n. 1, p. 152, doi. 10.1002/chem.200400699

By:

Christian Adlhart;
Osamu Sekiguchi;
Einar Uggerud

Publication type:

Article

Serum sickness with an elevated level of human anti-chimeric antibody following treatment with rituximab in a child with chronic immune thrombocytopenic purpura.

Published in:

2009

By:

Goto, Shoko;
Goto, Hiroaki;
Tanoshima, Reo;
Kato, Hiromi;
Takahashi, Hiroyuki;
Sekiguchi, Osamu;
Kai, Sumio

Publication type:

journal article

Unimolecular HF Loss from the Molecular Ions of Fluorophenols and Fluoroanilines. A 'Ring-walk' Mechanism of a Fluorine Atom.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1996, v. 10, n. 9, p. 1076, doi. 10.1002/(SICI)1097-0231(19960715)10:9<1076::AID-RCM621>3.0.CO;2-5

By:

Tajima, Susumu;
Ueki, Makoto;
Tajima, So;
Sekiguchi, Osamu;
Shigihara, Atsushi

Publication type:

Article

Fragmentation processes of 1,2-diphenoxyethane and 2-phenoxyethanol by electron impact.

Published in:

Rapid Communications in Mass Spectrometry: RCM, 1995, v. 9, n. 1, p. 75, doi. 10.1002/rcm.1290090117

By:

Sekiguchi, Osamu;
Ayuzawa, Terukazu;
Fujishige, Masao;
Yanagisawa, Tamae;
Tajima, Susumu

Publication type:

Article

Relationship between vertical distributions of Bray II P content and organic P content in the Ap horizon of paddy rice fields.

Published in:

Soil Science & Plant Nutrition, 2006, v. 52, n. 5, p. 654, doi. 10.1111/j.1747-0765.2006.00083.x

By:

AKAHANE, Ikuko;
SASAKI, Naoko;
NANZYO, Masami;
TAKAHASHI, Tadashi;
TASHIRO, Takashi;
SEKIGUCHI, Osamu;
SAIGUSA, Masahiko

Publication type:

Article

Reactions of nitrophenide and halonitrophenide ions with acrylonitrile and alkyl acrylates in the gas phase: addition to the carbonyl group versus Michael addition.

Published in:

Journal of Mass Spectrometry, 2012, v. 47, n. 4, p. 425, doi. 10.1002/jms.2042

By:

Zimnicka, Magdalena;
Wileńska, Beata;
Sekiguchi, Osamu;
Uggerud, Einar;
Danikiewicz, Witold

Publication type:

Article

Metastable ion study of organosilicon compounds. Part XIV.

Published in:

Journal of Mass Spectrometry, 2002, v. 37, n. 3, p. 299, doi. 10.1002/jms.284

By:

Tajima, Susumu;
Watanabe, Daisuke;
Nakajima, Satoshi;
Sekiguchi, Osamu;
Nibbering, Nico M. M.

Publication type:

Article

Metastable ion study of organosilicon compounds. Part XIII: dimethoxydimethylsilane, (CH.

Published in:

Journal of Mass Spectrometry, 2001, v. 36, n. 7, p. 816, doi. 10.1002/jms.184

By:

Tajima, Susumu;
Sekiguchi, Osamu;
Watanabe, Yuko;
Nakajima, Satoshi;
Takahashi, Yutaka

Publication type:

Article

Collision-induced dissociation spectra versus collision energy (collision-induced dissociation curve) using a quadrupole ion trap mass spectrometer. II.

Published in:

Journal of Mass Spectrometry, 2000, v. 35, n. 9, p. 1144, doi. 10.1002/1096-9888(200009)35:9<1144::AID-JMS43>3.0.CO;2-Q

By:

Tajima, Susumu;
Siang, Low Foon;
Fujishige, Masao;
Nakajima, Satoshi;
Sekiguchi, Osamu

Publication type:

Article

Routes of Formation and Decomposition of the m / z 59 Ions with Elemental Composition C.

Published in:

Journal of Mass Spectrometry, 1997, v. 32, n. 7, p. 755, doi. 10.1002/(SICI)1096-9888(199707)32:7<755::AID-JMS528>3.0.CO;2-G

By:

Sekiguchi, Osamu;
Aoyagi, Kenichi;
Tajima, Susumu;
Nibbering, Nico M. M.

Publication type:

Article

Works by Sekiguchi, Osamu

Intermediates in the Methanol-to-hydrocarbons (MTH) Reaction: A Gas Phase Study of the Unimolecular Reactivity of Multiply Methylated Benzenium Cations.

Unimolecular metastable decompositions of gem-dimethoxyalkanes (RR′C(OCH<sub>3</sub>)<sub>2</sub>) upon electron impact. I. Dimethoxymethane and 1,1-dimethoxyethane.

A simple method for characterizing a neutral species lost in a metastable decomposition using a tandem mass spectrum of a naturally abundant isotopic ion containing a <sup>13</sup>C atom.

Elimination of difluorocarbene from the molecular ions of α,α,α-Trifluorocresols with a fluorine atom migration in an ion trap mass spectrometer.

A novel fragmentation process in RC<sup>+</sup>(OCH<sub>3</sub>)<sub>2</sub> ions (R = H, CH<sub>3</sub>). The transfer of a hydrogen atom and a methyl group.

Unimolecular hydrogen chloride loss from the molecular ions of chlorophenols. A 'ring-walk' mechanism for a chlorine ion.

Solution and Gas-Phase Acidities of all-trans (all-E) Retinoic Acid: An Experimental and Computational Study.

Conclusive Evidence for Two Unimolecular Pathways to Zeolite-Catalyzed De-alkylation of the Heptamethylbenzenium Cation.

On the Gas-Phase Reactivity of Complexed OH+ with Halogenated Alkanes.

Serum sickness with an elevated level of human anti-chimeric antibody following treatment with rituximab in a child with chronic immune thrombocytopenic purpura.

Unimolecular HF Loss from the Molecular Ions of Fluorophenols and Fluoroanilines. A 'Ring-walk' Mechanism of a Fluorine Atom.

Fragmentation processes of 1,2-diphenoxyethane and 2-phenoxyethanol by electron impact.

Relationship between vertical distributions of Bray II P content and organic P content in the Ap horizon of paddy rice fields.

Reactions of nitrophenide and halonitrophenide ions with acrylonitrile and alkyl acrylates in the gas phase: addition to the carbonyl group versus Michael addition.

Metastable ion study of organosilicon compounds. Part XIV.

Metastable ion study of organosilicon compounds. Part XIII: dimethoxydimethylsilane, (CH.

Collision-induced dissociation spectra versus collision energy (collision-induced dissociation curve) using a quadrupole ion trap mass spectrometer. II.

Routes of Formation and Decomposition of the m / z 59 Ions with Elemental Composition C.