Three different devices that-can be used for surface-induced dissociation (SID) m tandem quadrupole instruments are compared here. The designs were compared by examining the fragmentation of several compounds including benzene, W(CO)6, and (CH3)4N(+). These studies show that SID can be readily implemented on a variety of tandem quadrupoIe instruments and that the spectra obtained with the in-line and 90° instruments are similar. Evidence is presented that confirms that high average internal energies and narrow distributions of internal energy are available by this technique. Efficiencies for fragmentation of odd-electron ions are on the order of those previously reported by others. The overall SID efficiency for even-electron ions is higher than that for odd-electron ions of similar structure.
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http://dx.doi.org/10.1016/1044-0305(92)85015-C | DOI Listing |
J Int Soc Prev Community Dent
October 2024
Department of Basic Dental Science, College of Dentistry, University of Mosul, Mosul, Iraq.
Aim: To evaluate the micro-shear bond strength (µ-SBS) of resin-modified glass ionomer cement and to assess the chemical and topographical changes in the zirconia fitting surface induced by acidulated phosphate fluoride (APF) gel using scanning electron microscope (SEM) analysis and Fourier transform infrared (FTIR) spectroscopy.
Materials And Methods: Thirty-two samples were prepared from two zirconia materials, UPCERA HT White and BruxZir Solid Zirconia, milled by a computer-aided design/computer-aided manufacturing system. From each zirconia sample, six plates were prepared for FTIR and SEM testing.
J Am Soc Mass Spectrom
January 2025
Native MS Guided Structural Biology Center, The Ohio State University, Columbus, Ohio 43210, United States.
Anal Chem
December 2024
Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich CH-8093, Switzerland.
Solution and gas-phase measurements can provide valuable insights into biomolecular conformational dynamics. By comparing the data from such experiments, it is possible to elucidate the nature of the interactions governing a biomolecule's stability. Here, we measured human, bovine, and porcine hemoglobin stability in solution and the gas phase using collision-induced dissociation, collision-induced unfolding, surface-induced dissociation, and temperature-controlled nanoelectrospray mass spectrometry.
View Article and Find Full Text PDFACS Cent Sci
August 2024
Native Mass Spectrometry Guided Structural Biology Center, Ohio State University, Columbus, Ohio 43210, United States.
We illustrate the utility of native mass spectrometry (nMS) combined with a fast, tunable gas-phase charge reduction, electron capture charge reduction (ECCR), for the characterization of protein complex topology and glycoprotein heterogeneity. ECCR efficiently reduces the charge states of tetradecameric GroEL, illustrating Orbitrap / measurements to greater than 100,000 /. For pentameric C-reactive protein and tetradecameric GroEL, our novel device combining ECCR with surface induced dissociation (SID) reduces the charge states and yields more topologically informative fragmentation.
View Article and Find Full Text PDFSe Pu
July 2024
CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Dynamic changes in the structures and interactions of proteins are closely correlated with their biological functions. However, the precise detection and analysis of these molecules are challenging. Native mass spectrometry (nMS) introduces proteins or protein complexes into the gas phase by electrospray ionization, and then performs MS analysis under near-physiological conditions that preserve the folded state of proteins and their complexes in solution.
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