^*Indicates author to whom correspondence should be addressed

Detection and characterization of natural polyamines by high-performance liquid chromatography-atmospheric pressure chemical ionization (electrospray ionization) mass spectrometry

Sergiy Chesnov, Laurent Bigler and Manfred Hesse^*
Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland. E-mail: mtbohley@oci.unizh.ch

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DOI: 10.1255/ejms.467

Electron ionization mass spectra of 2- and 4-chloro- and bromo-substituted diphenylamines

A.M. Hassan Rezk and Kh.A. Sife- Eldeen
National Centre for Radiation Research and Technology, Nasr City, Cairo, Egypt
M.A. Rabbih and Ezzat T.M. Selim^*
Atomic and Molecular Physics Unit, Nuclear Physics Department, NRC, Atomic Energy Authority, Cairo 13759, Egypt

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DOI: 10.1255/ejms.468

Metal chelating agents III: mass spectral studies on the semicarbazone derivatives of benzoin and 2-hydroxy-1-naphthaldehyde

Narayan T. Akinchan
Department of Pure and Applied Chemistry, University of Calabar, Unical Post Box 3619, Calabar, Nigeria. E-mail: akinchan@unical.anpa.net.ng

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DOI: 10.1255/ejms.469

Ortho effects in the dissociation of ionized N-chlorophenyl- and N-bromophenyl-2-aminobenzamidines: intramolecular aromatic substitution with cyclization to protonated 2-(2-aminophenyl)-1H-benzimidazoles

Maria Anita Mendes, Roberto Rittner and Marcos N. Eberlin^*
Institute of Chemistry, State University of Campinas—UNICAMP, CP 6154, 13083-970 Campinas, SP Brazil
Jerzy Suwinski and W. Szczepankiewicz
Institute of Organic Chemistry and Technology, The Silesian Technical University, 44-100 Gliwice, Poland

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DOI: 10.1255/ejms.470

Matrix-assisted laser desorption/ionization and Fourier transform ion cyclotron resonance mass spectrometry of metalloporphyrazines and metallophthalocyanines

Eva Mørkved and Helge Kjøsen
Department of Chemistry, Norwegian University of Science and Technology, Sem Sælands vei 8, N-7491 Trondheim, Norway
John Vedde and Einar Uggerud^*
Department of Chemistry, University of Oslo, PO Box 1033, Blindern, N-0315 Oslo, Norway. E-mail: einar.uggerud@kjemi.uio.no

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DOI: 10.1255/ejms.471

Scope and limitation of matrix-assisted laser desorption/ionization Fourier transform mass spectrometry for testing the complexing behavior of two crown ethers derived from D-hexopyranosides

Pierre-Jean Calba and Jean-François Muller
Laboratoire de Spectrométrie de Masse et de Chimie Laser, 1 Bd Arago, Technopôle Metz 2000, F-57078 Metz cedex 3, France
Marie-Françoise Schmitt-Dubessy, Jean-Pierre Joly^* and Yves Chapleur
Groupe SUCRES, UMR 7565 CNRS, Université Henri Poincaré-Nancy I, CO 79, BP 239, F-54506 Vandoeuvre, France

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DOI: 10.1255/ejms.472

Backbone cleavages of [M – H]^– anions of peptides. New backbone cleavages following cyclisation reactions of a C- terminal [CONH]^– group with Ser residues and the use of the g backbone cleavage initiated by Gln to differentiate between Lys and Gln residues

Craig S. Brinkworth, Suresh Dua and John H. Bowie^*
Department of Chemistry, The University of Adelaide, South Australia, 5005

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DOI: 10.1255/ejms.473

Letter: Characteristics of photoelectrons emitted in matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance experiments

Michael V. Gorshkov
Institute of Energy Problems of Chemical Physics, Russian Academy of Sciences, Moscow 117829, Russia
Vladimir E. Frankevich and Renato Zenobi^*
Department of Chemistry, Swiss Federal Institute of Technology, ETH Hönggerberg, CH-8093 Zurich, Switzerland

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DOI: 10.1255/ejms.474

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