Results 211 to 220 of about 161,545 (265)

The Desorption Process in MALDI

Chemical Reviews, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Klaus Dreisewerd
exaly   +3 more sources

Desorption times in flash desorption and isothermal desorption experiments

Chemical Physics Letters, 1979
Abstract Setting up the appropriate initial value problems in a non-equilibrium quantum-statistical theory of desorption we calculate and correlate isothermal and flash desorption times and show that, though different, they are of the same order over reasonable temperatures. Predictions for the He/constantan and He/LiF systems are given.
Z.W. Gortel, H.J. Kreuzer
openaire   +1 more source

Cluster-Induced Desorption/Ionization of Polystyrene: Desorption Mechanism and Effect of Polymer Chain Length on Desorption Probability

Journal of the American Society for Mass Spectrometry, 2022
Soft cluster-induced desorption/ionization of polystyrene oligomers was investigated with respect to application in mass spectrometry. Clear peak progressions corresponding to intact polystyrene molecules were observed in the mass spectra, and no fragmentation was detected; efficient desorption was deduced from quartz crystal microbalance measurements.
Pascal Schneider, Felix Verloh, Michael Dürr   +2 more
openaire   +2 more sources

Deconstructing Desorption Electrospray Ionization: Independent Optimization of Desorption and Ionization by Spray Desorption Collection

Journal of the American Society for Mass Spectrometry, 2012
Spray desorption collection (SDC) and reflective electrospray ionization (RESI) were used to independently study the desorption and ionization processes that together comprise desorption electrospray ionization (DESI). Both processes depend on several instrumental parameters, including the nebulizing gas flow rate, applied potential, and source ...
Kevin A, Douglass, Shashank, Jain, William R, Brandt, Andre R, Venter   +3 more
openaire   +2 more sources

Desorption and Ionization Mechanisms in Desorption Atmospheric Pressure Photoionization

Analytical Chemistry, 2008
The factors influencing desorption and ionization in newly developed desorption atmospheric pressure photoionization-mass spectrometry (DAPPI-MS) were studied. Redirecting the DAPPI spray was observed to further improve the versatility of the technique: for dilute samples, parallel spray with increased analyte signal was found to be the best suited ...
Laura, Luosujärvi, Ville, Arvola, Markus, Haapala, Jaroslav, Pól, Ville, Saarela, Sami, Franssila, Tapio, Kotiaho, Risto, Kostiainen, Tiina J, Kauppila   +8 more
openaire   +2 more sources

Instability of desorption mode in laser-stimulated desorption

Physica B+C, 1986
Abstract A theoretical model of IR laser-induced desorption is developed. An analysis of experimental data shows that this desorption may have a collective character. Such collective character may be the result of so-called resonant or indirect heating. It is shown that this mechanism is not a very efficient one.
Fain, B., Boeglin, A., Lin, Sheng-Hsien
openaire   +1 more source

Intraparticle Sorption and Desorption of Antibiotics

Journal of Hazardous Materials, 2023
Intraparticle domains are the critical locations for storing contaminants and retarding contaminant transport in subsurface environments. While the kinetics and extent of antibiotics sorption and desorption in subsurface materials have been extensively studied, their behaviors in intraparticle domains have not been well understood.
Cheng Zhang, Rong Li, Dongfang Ke, Hongri Suo, Shuai Wang, Enze Ma, Yulong Chen, Chongxuan Liu   +7 more
openaire   +2 more sources

Directed desorption as a probe of the structure of the desorption site

Surface Science Letters, 1982
Abstract This paper attempts to assess the effects of surface structure on the angular variation of the desorption flux. Quantum calculations are done which show that if the gas-surface interaction potential is sufficiently corrugated in the neighborhood of the desorption site, and the adsorbate molecules desorb without going through a mobile ...
D.R. Horton, W.F. Banholzer, R.I. Masel
openaire   +1 more source

Azimsulfuron Sorption−Desorption on Soil

Journal of Agricultural and Food Chemistry, 2004
The sorption and desorption of the herbicide azimsulfuron, N-[[(4-dimethoxypyrimidin-2-yl)amino]carbonyl]1-methyl-4-(2-methyl-2H-tetrazole-5-yl)1H-pyrazole-5-sulfonamide, were studied using five soils. Sorption isotherms conformed to the Freundlich equation. It was found that pH is the main factor influencing the sorption and that the sorption on soils
A. Pusino, M. V. Pinna, GESSA, CARLO EMANUELE   +2 more
openaire   +3 more sources