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Analysis of Pigmented Inkjet Printer Inks and Printed Documents by Laser Desorption/Mass Spectrometry *,†
Abstract:  Anyone with a computer, scanner, and color printer has the capability for creating documents such as identification cards, passports, and counterfeit currency. Laser desorption massExpand
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An approach to locate phosphorylation sites in a phosphoprotein: mass mapping by combining specific enzymatic degradation with matrix-assisted laser desorption/ionization mass spectrometry.
A rapid, picomole-scale method is described to locate phosphorylation sites in phosphoproteins by using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS)Expand
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Evaluation of desorption/ionization mass spectrometric methods in the forensic applications of the analysis of inks on paper.
Fast atom bombardment and laser desorption mass spectrometry (LDMS) provide molecular level information concerning an ink's composition. Two ink-jet printer inks, Ink A containing the cationic dyeExpand
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The Detection of Multiply Charged Dyes Using Matrix‐Assisted Laser Desorption/Ionization Mass Spectrometry for the Forensic Examination of Pen Ink Dyes Directly from Paper
Abstract:  Laser desorption mass spectrometry (LDMS) is emerging as a technique for questioned document examination. Its use is limited to detecting ink dyes that are neutral or singly charged.Expand
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Enhanced detection of phosphopeptides in matrix-assisted laser desorption/ionization mass spectrometry using ammonium salts
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) has been used successfully to detect phosphorylation sites in proteins. Applications may be limited by the low response ofExpand
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Ionization processes in matrix-assisted laser desorption/ionization mass spectrometry: Matrix-dependent formation of [M + H]+ vs [M + Na]+ ions of small peptides and some mechanistic comments
The relative signal intensities of [M + H]+ vs [M + Na]+ ions of some small peptides were found to be highly matrix-dependent in matrix-assisted laser desorption/ionization (MALDI) experiments whenExpand
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Mass Spectrometric Detection of Protein, Lipid and Heme Components of Cytochrome c Oxidase from R. Sphaeroides and the Stabilization of Non-Covalent Complexes from the Enzyme
The cytochrome c oxidase enzyme from Rhodobacter sphaeroides bacteria exists as a complex of four peptide subunits, two hemes and a variety of lipids and metal ions held together by non-covalentExpand
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Direct matrix-assisted laser desorption ionization mass spectrometric analysis of proteins immobilized on nylon-based membranes
Direct analysis of proteins adsorbed onto the surface of nylon membranes has been performed at the picomole level by matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS). Nylon-66Expand
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Charge remote fragmentation of peptides following attachment of a fixed positive charge: A matrix-assisted laser desorption/ionization postsource decay study
A fixed positive charge can be placed at the N-terminus of a peptide by addition of a tris[(2,4,6-trimethoxyphenyl)phosphonium]acetyl group. The usefulness of these charged derivatives has beenExpand
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