Results 11 to 20 of about 553,070 (330)

Analysis of Oligonucleotides by Electrospray Ionization Mass Spectrometry [PDF]

open access: greenCurrent Protocols in Nucleic Acid Chemistry, 2000
AbstractBecause of the high molecular weights and thermal lability of biomolecules such as nucleic acids and protein, they can be difficult to analyze by mass spectrometry. Such analyses require a “soft” ionization method that is capable of generating intact molecular ions.
Polo, Lenore M., Limbach, Patrick A.
openaire   +5 more sources

Probing metal ion binding and conformational properties of the colicin E9 endonuclease by electrospray ionization time-of-flight mass spectrometry [PDF]

open access: bronze, 2002
Nano-electrospray ionization time-of-flight mass spectrometry (ESI-MS) was used to study the conformational consequences of metal ion binding to the colicin E9 endonuclease (E9 DNase) by taking advantage of the unique capability of ESI-MS to allow ...
HECK, ALBERT J.R.   +6 more
core   +5 more sources

Quantitative measurement of different ceramide species from crude cellular extracts by electrospray ionization tandem mass spectrometry (ESI-MS/MS) [PDF]

open access: hybridJournal of Lipid Research, 1999
Ceramide (CER) is an important signaling molecule involved in a variety of cellular processes, including differentiation, cell growth, and apoptosis.
G. Liebisch   +7 more
doaj   +2 more sources

Advances in MALDI Mass Spectrometry Imaging Single Cell and Tissues

open access: yesFrontiers in Chemistry, 2022
Compared with conventional optical microscopy techniques, mass spectrometry imaging (MSI) or imaging mass spectrometry (IMS) is a powerful, label-free analytical technique, which can sensitively and simultaneously detect, quantify, and map hundreds of ...
Xiaoping Zhu   +6 more
doaj   +1 more source

Desorption Electrospray Ionization-Mass Spectrometry of Proteins [PDF]

open access: yesAnalytical Chemistry, 2007
Desorption electrospray ionization-mass spectrometry (DESI-MS) was evaluated for the detection of proteins ranging in molecular mass from 12 to 66 kDa. Proteins were uniformly deposited on a solid surface without pretreatment and analyzed with a DESI source coupled to a quadrupole ion trap mass spectrometer.
Richard T. Mayer   +4 more
openaire   +3 more sources

Applications of Tandem Mass Spectrometry (MS/MS) in Protein Analysis for Biomedical Research

open access: yesMolecules, 2022
Mass Spectrometry (MS) allows the analysis of proteins and peptides through a variety of methods, such as Electrospray Ionization-Mass Spectrometry (ESI-MS) or Matrix-Assisted Laser Desorption Ionization-Mass Spectrometry (MALDI-MS).
Anca-Narcisa Neagu   +5 more
doaj   +1 more source

Is Charge Reduction in ESI Really Necessary? [PDF]

open access: yes, 2008
The technique of charge reduction electrospray mass spectrometry (CREMS), which can reduce the charge state complexity produced in electrospray ionization (ESI), is ...
Smith, Lloyd M.
core   +1 more source

Structure elucidation of sildenafil analogues in herbal products. [PDF]

open access: yes, 2004
The structure of unknown compounds present in herbal products was elucidated using liquid chromatography-electrospray ionization-mass spectrometry, direct-infusion electrospray ionization-mass spectrometry, and nuclear magnetic resonance.
Bakker, F   +7 more
core   +1 more source

Estudo por espectrometria de massas de soluções de hidróxi(tosilóxi)iodobenzeno: propostas para mecanismos de desproporção

open access: yesQuímica Nova, 2012
Solutions of [hydroxy(tosyloxy)iodo]benzene (HTIB or Koser's reagent) in acetonitrile were analyzed using high resolution electrospray ionization mass spectrometry (ESI-MS) and electrospray ionization tandem mass spectrometry (ESI-MS/MS) under different ...
Ramon S. Vasconcelos   +2 more
doaj   +1 more source

False positives and the detection of cyclodextrin inclusion complexes by electrospray mass spectrometry [PDF]

open access: yes, 1995
The results of previous works that have claimed to detect cyclodextrin inclusion complexes via the “soft” ionization technique of electrospray ionization mass spectrometry are revisited.
Cunniff, John B., Vouros, Paul
core   +1 more source

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