Mass spectrometer

In this work, the equipment was used to investigate the distribution of lithium (7Li) and boron (11B) in the outer oxide at the bow contact area. Depth profiling in the clad oxide at the opposite side of the rod to the point of contact, which is considered to have experienced normal operating conditions and which has a typical oxide thickness, evidenced levels of ∼10–20 ppm 7Li and a 11B content reaching hundreds of ppm in the outer parts of the oxide, largely in agreement with the expected range of Li and B clad oxide concentrations from previous studies.

9p christabelhuynh 30-05-2020 6 1   Download

Two blind analyses for 241Pu(nth,f) isobaric fission yields have been conducted, one analysis using a mix of a Monte-Carlo and an analytical method, the other one relying only on analytical calculations. The calculations have been derived from the same analysis path and experimental data, obtained on the LOHENGRIN mass spectrometer at the Institut Laue-Langevin.

8p christabelhuynh 29-05-2020 7 1   Download

The fluence-dependent photodissociation experiments show that the V19+ clusters prefer the evaporation of vanadium dimers rather than monomers. This finding is in line with dissociation energies extracted from early collision-induced dissociation data.

7p thithizone 16-07-2019 13 0   Download

This studywas designed to yield data on the supramolecular organization of the phycobilisome apparatus from Synechocystis, and the possible effects of environmental stress on this arrangement. Phycobilisomes were dissociated ina low ionic strength solutionandaquantitative estimation of the protein components present in each subcomplex was obtained using liquid chromatography coupled on-line with a mass spectrometer equipped with an electrospray ion source (ESI-MS).

9p research12 29-04-2013 50 3   Download

Mass spectrometric studies on the N-linked glycans of aminopeptidase 1 from Manduca sextahave revealed unusual structures not previously observed on any insect glycoprotein. Structure elucidation of these oligosaccha-rides was carried out by high-energy collision-induced dissociation (CID) using a matrix-assisted laser desorp-tion/ionization time-of-flight/time-of-flight (MALDI-TOF/ TOF) tandem mass spectrometer.

18p awards 05-04-2013 36 4   Download

Peptide and protein sequence analysis using a combination of gas-phase ion–ion chemistry and tandem MS is described. Samples are converted to multiply charged ions by ESI and then allowed to react with fluoranthene radical anions in a quadrupole linear ion trap mass spectrometer.

8p media19 05-03-2013 37 2   Download

For the characterization of protein sequences and post-translational modifi-cations by MS, the ‘top-down’ proteomics approach utilizes molecular and fragment ion mass data obtained by ionizing and dissociating a protein in the mass spectrometer.

13p media19 05-03-2013 39 3   Download

ESI greatly enhanced the ability to characterize protein and peptides by MS.
ESI requires the sample of interest to be in solution- flow in to the ionization source region.
To ionize the sample, high voltage is applied, result in the sample becoming positively or negatively charged; however, positive ionization is used primarily in the analysis proteins and peptides.
As it exits the spray tip, the solution produces submicrometer-sized droplets containing both solute and analyte ions. The sample is then desorbed of solute prior to entering the analyzer region....

76p caubebimu 13-01-2013 48 7   Download