Zobrazeno 1 - 10
of 17
pro vyhledávání: '"C. E. M. Heeremans"'
Autor:
R. McCague, Wilfried M. A. Niessen, C. E. M. Heeremans, R.A.M. van der Hoeven, J. van der Greef, G.K. Poon, M. Jarman, J.H. Davies
Publikováno v:
Journal of Chromatography B: Biomedical Sciences and Applications. 576:235-244
Liquid chromatography with thermospray mass spectrometry has proved to be an invaluable technique for the study of metabolic degradation of xenobiotics in complex biological fluids. This paper describes the detection of 4-hydroxyandrost-4-ene-3,17-di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ec93241658f062a55a835723b8803e2
https://doi.org/10.1016/0378-4347(92)80197-x
https://doi.org/10.1016/0378-4347(92)80197-x
Autor:
N. M. M. Nibbering, R.A.M. van der Hoeven, C. E. M. Heeremans, Wilfried M. A. Niessen, J. van der Greef
Publikováno v:
Organic Mass Spectrometry. 26:519-527
The application of a high potential at the repeller electrode, positioned opposite to the sampling cone in order to increase the sampling efficiency, can induce fragmentation in thermospray mass Spectrometry. Until now, this fragmentation has been at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::780824d8ab6920558f9dda1b4f8b7eea
https://doi.org/10.1002/oms.1210260528
https://doi.org/10.1002/oms.1210260528
Autor:
A.P. Tinke, Wilfried M. A. Niessen, R.A.M. van der Hoeven, C. E. M. Heeremans, Nico M. M. Nibbering, J. van der Greef
Publikováno v:
Rapid Communications in Mass Spectrometry. 5:188-191
The formation of singly protonated water clusters in the positive-ion mode and singly deprotonated water clusters as well as singly negatively charged water clusters in the negative-ion mode with a thermospray system running on pure water and in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d2573bf37e15d71ea1e26c02c0bb17d
https://doi.org/10.1002/rcm.1290050409
https://doi.org/10.1002/rcm.1290050409
Autor:
R.A.M. van der Hoeven, J. van der Greef, Wilfried M. A. Niessen, A. M. Stijnen, Meindert Danhof, C. E. M. Heeremans
Publikováno v:
Journal of chromatography. 554(1-2)
An unknown heptabarbital metabolite, observed in the liquid chromatogram of rat plasma and urine samples after administration of heptabarbital, was identified by liquid chromatography-thermospray tandem mass spectrometry. By applying the parent scan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca9553cdaf4bbad3c2bda827307d7b6f
https://pubmed.ncbi.nlm.nih.gov/1686611
https://pubmed.ncbi.nlm.nih.gov/1686611
Autor:
T. van der Leer, Robert Verpoorte, J. vander Greef, Christian Giroud, R.W. van der Heijden, C. E. M. Heeremans, Wilfried M. A. Niessen
Publikováno v:
Planta medica. 57(2)
The alkaloids from CINCHONA LEDGERIANA shoot cultures and from CINCHONA ROBUSTA shoot cultures and a compact globular structure (CGS) culture were analyzed by thermospray liquid chromatography/mass spectrometry (TSP LC/MS). Because of the relative st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82171982c32f96e8af861757f8d7f3a5
https://pubmed.ncbi.nlm.nih.gov/17226138
https://pubmed.ncbi.nlm.nih.gov/17226138
Autor:
Wilfried M. A. Niessen, C. E. M. Heeremans, Lars-Erik Edholm, J. van der Greef, R.A.M. van der Hoeven, U.R. Tjaden, Agneta Walhagen
Publikováno v:
Journal of Chromatography A. 474:257-263
The applicability of phase-system switching using thermospray tandem mass spectrometry is demonstrated for the bioanalysis of the enantiomers of the betablocker metoprolol. Independent optimization of the chromatography, using an α1-acid glycoprotei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78e34f57f795f55cdeec5bcfe99ac6aa
https://doi.org/10.1016/s0021-9673(01)93920-2
https://doi.org/10.1016/s0021-9673(01)93920-2
Autor:
U.R. Tjaden, J. van der Greef, R.A.M. van der Hoeven, C. E. M. Heeremans, Wilfried M. A. Niessen, M.A.G. De Kraa
Publikováno v:
Journal of Chromatography A. 474:113-122
The effects of the repeleler voltage on the discharge-on mass spectra of the reagent gas and of analytes has been investigated systematically. This first part describes in detail the influence on the reagent gas spectra produced from methanol—water
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf4eb62c232ded6846b748eac50ebc9e
https://doi.org/10.1016/s0021-9673(01)93906-8
https://doi.org/10.1016/s0021-9673(01)93906-8
Autor:
Wilfried M. A. Niessen, R.A.M. van der Hoeven, C. E. M. Heeremans, U.R. Tjaden, J. van der Greef
Publikováno v:
Organic Mass Spectrometry. 24:109-112
Combined liquid chromatography and mass spectrometry is frequently performed with the thermospray interface nowadays. With thermospray a special ion source has to be installed. Tuning and calibration of that special source is still a problem which ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::533b8f9bd6da99c635d0c87f27c33ef5
https://doi.org/10.1002/oms.1210240209
https://doi.org/10.1002/oms.1210240209
Autor:
U.R. Tjaden, J. van der Greef, R.A.M. van der Hoeven, C. E. M. Heeremans, Wilfried M. A. Niessen, M.A.G. De Kraa
Publikováno v:
Scopus-Elsevier
By changing the potential of the repeller electrode in a thermospray ion source operated under discharge-on conditions in liquid chromatography mass spectrometry and supercritical-fluid chromatography-mass spectrometry the appearance of the mass spec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c27ffe0cf24bc059e8fe663613d7649
https://doi.org/10.1016/s0021-9673(01)84403-4
https://doi.org/10.1016/s0021-9673(01)84403-4
Autor:
C. E. M. Heeremans, G.F. La Vos, J. van der Greef, J. M. Te Koppele, Johannes Brussee, J. Der Van Greef, Wilfried M. A. Niessen, M. C. Noever Ten De Brauw
Publikováno v:
Biological Mass Spectrometry. 17:181-186
Diastereomeric glutathione conjugates of α-bromoisovalerylurea [N-(aminocarbonyl)-2-bromo-3-methylbutanamide] can be distinguished using fast atom bombardment in combination with tandem mass spectrometry. In the positive ion mode differentiation bet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edca095d082ce4e2eb7d2f3bcc4a85bf
https://doi.org/10.1002/bms.1200170306
https://doi.org/10.1002/bms.1200170306