Results 301 to 310 of about 446,733 (340)
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Ionization Constants and Ionization Profiles
2007Most drug molecules are ionizable in aqueous solutions. Ionization occurs when the molecules acquire or lose hydrogen ions in response to changes in the pH of the solution. This chapter reviews the theory of solution equilibria, which explains the behavior of ionizable molecules in solution, and describes the structural features of organic molecules ...
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Triboelectric spray ionization
Journal of Mass Spectrometry, 2013Triboelectric spray ionization (TESI) is a variation of electrospray ionization (ESI) using common instrumental components, including gas flow, solvent flow rate and heat, the only difference being the use of a high‐voltage power supply for ESI or a static charge for TESI.
Özdemir A, Lin JL, Gillig KJ, Chen CH.
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Carbohydrate Research, 2010
Glucose, galactose, and mannose in H(2)O and D(2)O were ionized by an atmospheric pressure chemical ionization (APCI) method. Isotope effects on fragmentation patterns of the monosaccharides were examined by deuterium replacement of the -OH groups to distinguish the isomers with a single mass spectrometer. The most abundant ions were the [M+H(2)O](+)()
Sung-Seen Choi, Jong-Chul Kim
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Glucose, galactose, and mannose in H(2)O and D(2)O were ionized by an atmospheric pressure chemical ionization (APCI) method. Isotope effects on fragmentation patterns of the monosaccharides were examined by deuterium replacement of the -OH groups to distinguish the isomers with a single mass spectrometer. The most abundant ions were the [M+H(2)O](+)()
Sung-Seen Choi, Jong-Chul Kim
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The Analyst, 2013
A novel self-powered dual spray ionization source has been developed for applications in mass spectrometry. This new source does not use any power supply and produces both positive and negative ions simultaneously. The idea behind this ionization source comes from the Kelvin water dropper.
Özdemir A, Lin JL, Gillig KJ, Chen CH.
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A novel self-powered dual spray ionization source has been developed for applications in mass spectrometry. This new source does not use any power supply and produces both positive and negative ions simultaneously. The idea behind this ionization source comes from the Kelvin water dropper.
Özdemir A, Lin JL, Gillig KJ, Chen CH.
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Physical Review A, 1986
Ion formation in sodium vapor (\ensuremath{\sim}${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium, ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$, and Na(3s) were observed.
C. E. Burkhardt +5 more
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Ion formation in sodium vapor (\ensuremath{\sim}${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium, ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$, and Na(3s) were observed.
C. E. Burkhardt +5 more
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Leukemia and Ionizing Radiation
Science, 1957Leukemia in man can be induced by ionizing radiations and also occurs spontaneously. For the "average" individual in a population, the probability of developing radiation-induced leukemia is estimated to be 2 × 10 –6 per rad (unit of absorbed dose of radiation) per year.
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International Journal of Radiation Oncology*Biology*Physics, 2022
Tobias R, Chapman, Matthew J, Abrams
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Tobias R, Chapman, Matthew J, Abrams
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Ion collection efficiency of ionization chambers in ultra‐high dose‐per‐pulse electron beams
Medical Physics, 2021Andreas Schüller, Daniela Poppinga
exaly