Page
%P
-
Article
Gas Phase Ion Chemistry to Determine Isoaspartate in a Peptide Backbone
Proof of concept evidence is presented for a new method for the determination of isoaspartate, an important post-translational modification. Chemical derivatization is performed using common reagents for the m...
-
Article
Deamination of protonated amines to yield protonated imines
Primary and secondary amines, when examined in atmospheric pressure chemical ionization, electrospray ionization, or chemical ionization, display protonated imines in their mass spectra. These products arise f...
-
Article
Gas-phase C-F bond cleavage in perfluorohexane using W-, Si-, P-, Br-, and I-containing ions: Comparisons with reactions at fluorocarbon surfaces
Gas-phase reactions of W-, Si-, P-, Br-, and I-containing ions with the target molecule perfluorohexane at low collision energies (<15 eV) parallel known ion/surface reactions of the same projectile ions at fl...
-
Article
14th International Mass Spectrometry Conference Tampere, Finland, August 25–29, 1997
-
Article
Surface Structure of A Liquid Perfluoropolyether Examined by Reactive Ion/Surface Scattering
This study shows that reactive ion/surface collisions can provide information on the surface structure of molecular systems. The microscopic structures of perfluorinated polyether (PFPE) liquid surfaces are ch...
-
Article
Process engineering of high-ethanol-tolerance yeast for the manufacture of ethanol
Inhibitory effects of ethanol and glucose on a high-ethanol-tolerance yeast strain (fusion product ofSaccharomyces diastaticus andSaccharomyces uvarum) having high osmotic and ethanol tolerance were studied in ba...
-
Article
Chemical modification of fluorinated self-assembled monolayer surfaces by low energy reactive ion bombardment
Reactive collisions of low energy (<100-eV) mass-selected ions are used to chemically modify fluorinated self-assembled monolayer surfaces comprised of alkanethiolate chains CF3(CF2)11(CH2)2S— bound to Au. Typica...
-
Article
Multiparticle simulation of ion motion in the ion trap mass spectrometer: Resonant and direct current pulse excitation
A PC-based program that simulates the behavior of a collection of ions is extended to include the effects of collisions with the buffer gas and enhanced visualization methods. The simulations are based on the ...
-
Article
Conformer selection of protein ions by ion mobility in a triple quadrupole mass spectrometer
Electrospray mass spectra of multiply charged protein molecules show two distinct charge state distributions proposed to correspond to a more highly charged, open conformational form and a lower charged, folde...
-
Article
Determination of Positions, Velocities, and Kinetic Energies of Resonantly Excited Ions in the Quadrupole Ion Trap Mass Spectrometer by Laser Photodissociation
The effects on ion motion caused by the application of a resonance AC dipole voltage to the end-cap electrodes of the quadrupole ion trap are described. An excimer laser is used to photodissociate benzoyl ions...
-
Article
Surface-Induced dissociation from a liquid surface
Mass-selected projectile ions in the tens of electronvolt energy range undergo surface-induced dissociation upon collision with a liquid perfluorinated polyether (PFPE) surface. The efficiency of translational...
-
Article
High-performance mass spectrometry with the ion trap mass spectrometer
-
Article
Surface-induced dissociation of molecular ions in a quadrupole ion trap mass spectrometer
A method is reported by which surface-induced dissociation is used to activate ions stored in a quadrupole ion trap mass spectrometer. The method employs a short (< 5 /-Is), fast-rising (< 20-ns rise time), hi...
-
Article
Information on the location of carbon-carbon double bonds in C6−C23 linear alkenes from carbon addition reactions in a quadrupole ion trap equipped with a pulsed sample-inlet system
Ion-molecule reactions of a number of alkene molecular ions with different neutral alkenes were studied in a quadrupole ion trap equipped with a pulsed sample-inlet system. The molecules studied include severa...
-
Article
Building mass spectrometers and a philosophy of research
Development of the techniques of ion kinetic energy spectrometry and mass-analyzed ion kinetic energy spectrometry is described. The extension of these concepts to the method of tandem mass spectrometry for di...
-
Article
Internal energy distributions deposited in doubly and singly charged tungsten hexacarbonyl ions generated by charge strip**, electron impact, and charge exchange
The distribution Pε of internal energies deposited in W(CO)6 +•. ions upon charge strip** (that is, electron detachment to yield the doubly charged ion in the course of a single kiloelec-tronvol...
-
Chapter and Conference Paper
Surface Organic Reactions Induced by Ion Bombardment
While chemical reactions, for example cationization, are common in desorption ionization methods,complex bonding processes are not [1–3]. Electron or ion transfer, clustering and fragmentation (often by simple...
-
Chapter and Conference Paper
Matrix Effects on Internal Energy in Desorption Ionization
Desorption ionization (DI) mass spectrometry encompasses a family of techniques in which energization of a condensed phase leads to ejection of ions into the vacuum with subsequent mass analysis and detection ...
-
Chapter and Conference Paper
Secondary Ion Mass Spectra (SIMS) as a Tool for Biomedical Studies: Mono- and Diquaternary Pyridine Oximes
Secondary Ion Mass Spectrometry (SIMS) was originally developed for study of metal surfaces and other involatile inorganic materials by sputtering. In recent years SIMS has been established as an excellent met...
-
Book
