Results 321 to 330 of about 1,487,728 (380)

Ionized calcium

Clinica Chimica Acta, 2011
Calcium is the most abundant mineral in the human body. While most of the body's calcium is sequestered in the skeleton, the free, hydrated cation in solution is a key physiologic mediator in a host of metabolic and regulatory processes. The free cation concentration in the extracellular fluid, historically referred to as "ionized calcium" in clinical ...
openaire   +2 more sources

Excise and Ionize

International Journal of Radiation Oncology*Biology*Physics, 2022
Tobias R, Chapman, Matthew J, Abrams
openaire   +2 more sources

IONIZATION AND DE-IONIZATION IN THE LOWER IONOSPHERE

1963
Abstract : A body of information pertaining to ionization and de-ionization in the lower ionosphere was compiled from various sources. Part of the data was derived from studies of geophysical observations, part of it from published and unpub lished laboratory measurements, and part from other ionospheric studies.
R. C. Whitten, I .G. Poppoff
openaire   +1 more source

Ionization of nitromethane in the flame ionization detector

Canadian Journal of Chemistry, 1981
The mass spectra observed on sampling the unburnt gases of a flame ionization detector to which nitromethane has been added are due mostly to proton transfer reactions of NH4+ and H3O+. These are formed in the reaction zone from the primary ion HCO+, and pass through the unburnt gases to the sampling orifice.
T. McAllister, A. J. C. Nicholson, J. D. Scott   +2 more
openaire   +1 more source

Ionization and dissociative ionization of methane molecules

Technical Physics, 2013
A technique for mass-spectrometric investigation of the yield of positive ions produced by direct and electron-impact dissociative ionization of methane molecules is described, and respective experimental data are presented. Doubly charged C 2 + , CH 3 2+
A. N. Zavilopulo, M. I. Mykyta, A. N. Mylymko, O. B. Shpenik   +3 more
openaire   +1 more source

Above threshold ionization beyond the high harmonic cutoff.

Physical Review Letters, 1993
Over the last few years, strong-field physics has advanced to a state that quantitative tests of theoretical models are now possible experimentally[1-3].
K. Schafer, K. Schafer, Baorui Yang, Baorui Yang, L. DiMauro, L. DiMauro, K. Kulander, K. Kulander   +7 more
semanticscholar   +1 more source

Electrospray ionization for mass spectrometry of large biomolecules.

Science, 1989
J. Fenn, M. Mann, C. Meng, Shek-Fu Wong, C. Whitehouse   +4 more
semanticscholar   +1 more source

Laser desorption ionization of proteins with molecular masses exceeding 10,000 daltons.

Analytical Chemistry, 1988
M. Karas, F. Hillenkamp
semanticscholar   +1 more source

Mass Spectrometry Sampling Under Ambient Conditions with Desorption Electrospray Ionization

Science, 2004
Z. Takáts, J. Wiseman, B. Gologan, R. Cooks, Hao Chen, Ismael Cotte-Rodríguez, Y. Song, R. Sparrapan, L. Eberlin, R. Haddad, M. Eberlin, R. Augusti   +11 more
semanticscholar   +1 more source

Molecular excitation energies to high-lying bound states from time-dependent density-functional response theory: Characterization and correction of the time-dependent local density approximation ionization threshold

, 1998
M. E. Casida, C. Jamorski, Kim C. Casida, D. Salahub   +3 more
semanticscholar   +1 more source