Christian Janfelt
Associate Professor - Promotion Programme
Toxicology and Drug Metabolism
Universitetsparken 2
2100 København Ø
- 2005
The magnitude of pseudo-potential errors for density functional calculations
Janfelt, Christian & Jensen, F., 2005, In: Chemical Physics Letters. 412, p. 501-503 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
The magnitude of pseudo-potential errors for bond distances and vibrational frequencies
Jensen, F. & Janfelt, Christian, 2005, In: Chemical Physics Letters. 412, p. 12-15 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2006
- Published
Characterization of a mini membrane inlet mass spectrometer for on-site detection of contaminants in both aqueous and liquid organic samples
Janfelt, Christian, Frandsen, H. & Lauritsen, F. R., 2006, In: Rapid Communications in Mass Spectrometry. 20, p. 1441–1446 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2007
- Published
Fast and direct screening of polyaromatic hydrocarbon (PAH)-contaminated sand using a miniaturized membrane inlet mass spectrometer (mini-MIMS)
Frandsen, H., Janfelt, Christian & Lauritsen, F. R., 2007, In: Rapid Communications in Mass Spectrometry. 21, p. 1574-1578 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Method for Quantification of Chemicals in a Pollution Plume Using a Moving Membrane-Based Sensor Exemplified by Mass Spectrometry
Janfelt, Christian, Lauritsen, F. R., Toler, S. K., Bell, R. J. & Short, R. T., 2007, In: Analytical Chemistry. 79, p. 5336-5342 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Ambient Mass Spectrometry with a Handheld Mass Spectrometer at High Pressure
Keil, A., Talaty, N., Janfelt, Christian, Noll, R. J., Gao, L., Ouyang, Z. & Cooks, R. G., 2007, In: Analytical Chemistry. 79, p. 7734-7739 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2008
- Published
Characterization and optimization of membrane inlets for a miniature ion trap mass spectrometer operating at a high background pressure of humid air
Janfelt, Christian, Graesboll, R. & Lauritsen, F. R., 2008, In: International Journal of Mass Spectrometry. 276, p. 17-23 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Kan analyselaboratoriet flyttes i felten?
Janfelt, Christian & Lauritsen, F. R., 2008, In: LMFK-Bladet. 1, p. 31-34 4 p.Research output: Contribution to journal › Journal article › Commissioned
Mass spectra of proteins and other biomolecules recorded using a handheld instrument
Janfelt, Christian, Talaty, N., Mulligan C., C., Keil, A., Quyang, Z. & Cooks, R. G., 2008, In: International Journal of Mass Spectrometry. 278, 2-3, p. 166-169Research output: Contribution to journal › Journal article › Research › peer-review
- Published
On-line monitoring of VOC emissions from nanofilm coating products using a handheld membrane inlet mass spectrometer
Nørgaard, A. W., Janfelt, Christian, Wolkoff, P., Jensen, K. A. & Lauritsen, F. R., 2008.Research output: Contribution to conference › Poster › Research
- 2009
- Published
Liquid-Phase MicroExtraction coupled to Desorption Electrospray Ionization Mass Spectrometry in pharmaceutical analysis
Janfelt, Christian, Thunig, U. J. C., Pedersen-Bjergaard, Stig & Hansen, S. H., 2009.Research output: Contribution to conference › Poster › Research
- Published
Release of VOCs and particles during use of nanofilm spray products
Nørgaard, A. W., Jensen, K. A., Janfelt, Christian, Lauritsen, F. R., Clausen, P. A. & Wolkoff, P., 2009, In: Environmental Science and Technology. 43, 20, p. 7824-7830 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2010
- Published
Direkte analyse med DESI-MS
Thunig, J., Lauritsen, F. R., Hansen, S. H., Janfelt, Christian & Christophersen, C., 2010, In: Dansk Kemi. 91, 3, p. 21-23 3 p.Research output: Contribution to journal › Journal article › Research
- 2011
- Published
Characterization of a capillary spray cell for easy analysis of extracts of biological samples
Janfelt, Christian & Lauritsen, F. R., 2011, In: International Journal of Mass Spectrometry. 299, p. 178-183Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Indirect DESI imaging of secondary metabolites in plant material
Janfelt, Christian, Thunig, U. J. C., Li, B. & Hansen, S. H., 2011. 1 p.Research output: Contribution to conference › Poster › Research
- Published
Massespektrometri viser fordelingen af lægemiddelstoffer i planter og væv
Janfelt, Christian, Thunig, J., Li, B., Andersen, N. W., Hansen, Harald S. & Hansen, S. H., Dec 2011, In: Lægemiddelforskning. 2011, p. 10-12Research output: Contribution to journal › Journal article › Communication
- Published
Characterization of barley leaf tissue using direct and indirect desorption electrospray ionization imaging mass spectrometry
Li, B., Bjarnholt, Nanna, Hansen, S. H. & Janfelt, Christian, 2011, In: Journal of Mass Spectrometry. 46, 12, p. 1241-1246Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Nebulization ionization and desorption ionization analysis of reactive organofunctionalized silanes in nanofilm products
Nørgaard, A. W., Janfelt, Christian, Benassi, M., Wolkoff, P. & Lauritsen, F. R., 2011, In: Journal of Mass Spectrometry. 46, 4, p. 402-410Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Analysis of secondary plant metabolites by indirect desorption electrospray ionization imaging mas spectrometry
Thunig, U. J. C., Hansen, S. H. & Janfelt, Christian, 2011, In: Analytical Chemistry. 83, p. 3256-3259Research output: Contribution to journal › Letter › Research › peer-review
- 2012
- Published
Ambient mass spectrometry imaging: a comparison of desorption ionization by sonic spray and electrospray
Janfelt, Christian & Nørgaard, A. W., Oct 2012, In: Journal of The American Society for Mass Spectrometry. 23, 10, p. 1670-8 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Billeddannende massespektrometri
Janfelt, Christian, D'Alvise, J., Li, B. & Hansen, S. H., 2012, In: Dansk Kemi. 93, 6/7, p. 12-14 3 p.Research output: Contribution to journal › Journal article › Communication
- Published
Billeddannende massespektrometri til analyse af vævsprøver
Janfelt, Christian, Wellner, N., D'Alvise, J. & Hansen, S. H., 2012, In: Dansk Kemi. 93, 8, p. 20-23Research output: Contribution to journal › Journal article › Research
- Published
Ischemia in neonatal rat brains analyzed by Desorption Electrospray Ionization Imaging mass spectrometry
Janfelt, Christian, Wellner, N., Leger, P., Kokesch-Himmelreich, J., Hansen, S. H., Charriaut-Marlangue, C. & Hansen, Harald S., 2012.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Portable electrospray ionization mass spectrometry (ESI-MS) for analysis of contaminants in the field
Janfelt, Christian, Græsbøll, R. & Lauritsen, F. R., 2012, In: International Journal of Environmental Analytical Chemistry. 92, 4, p. 397–404 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Visualization by mass spectrometry of 2-dimensional changes in rat brain lipids, including N-acylphosphatidylethanolamines, during neonatal brain ischemia
Janfelt, Christian, Wellner, N., Leger, P., Kokesch-Himmelreich, J., Hansen, S. H., Charriaut-Marlangue, C. & Hansen, Harald S., 2012, In: F A S E B Journal. 26, 6, p. 2667-2673Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Direct and indirect imaging of secondary metabolites and enzymatic reactions in plant material by Desorption Electrospray Ionization
Li, B., Bjarnholt, Nanna, Knudsen, C., D'Alvise, J., Hansen, S. H. & Janfelt, Christian, 2012.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Liquid-phase microextraction and desorption electrospray ionization mass spectrometry for identification and quantification of basic drugs in human urine
Thunig, J., Flø, L., Pedersen-Bjergaard, Stig, Hansen, S. H. & Janfelt, Christian, 2012, In: Rapid Communications in Massspectrometry. 26, 2, p. 133-140Research output: Contribution to journal › Journal article › Research › peer-review
- 2013
- Published
Displaced dual-mode imaging with desorption electrospray ionization for simultaneous mass spectrometry imaging in both polarities and with several scan modes
Janfelt, Christian, Wellner, N., Hansen, Harald S. & Hansen, S. H., Mar 2013, In: Journal of Mass Spectrometry. 48, 3, p. 361-6 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Direct imaging of plant metabolites in leaves and petals by Desorption Electrospray Ionization mass spectrometry
Li, B., Hansen, S. H. & Janfelt, Christian, 2013, In: International Journal of Mass Spectrometry. 348, p. 15-22Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Visualizing metabolite distribution and enzymatic conversion in plant tissues by desorption electrospray ionization mass spectrometry imaging
Li, B., Baden, C. K., Hansen, N. K. K., Jørgensen, Kirsten, Kannangara, R. M., Bak, Søren, Takos, A. M., Rook, F., Hansen, S. H., Møller, Birger Lindberg, Janfelt, Christian & Bjarnholt, Nanna, 2013, In: Plant Journal. 74, 6, p. 1059-1071 74.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
High-throughput analysis of drugs in biological fluids by desorption electrospray ionization mass spectrometry coupled with thin liquid membrane extraction
Rosting, C., Pedersen-Bjergaard, Stig, Hansen, S. H. & Janfelt, Christian, 2013, In: Analyst. 138, 20, p. 5965-72 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
N-acylation of phosphatidylethanolamine and its biological functions in mammals
Wellner, N., Diep, T. A., Janfelt, Christian & Hansen, Harald S., Mar 2013, In: BBA General Subjects. 1831, 3, p. 652-62 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2014
- Published
Mass spectrometry imaging of plant metabolites – principles and possibilities
Bjarnholt, Nanna, Li, B., D'Alvise, J. & Janfelt, Christian, 2014, In: Natural Product Reports. 31, 6, p. 818-837 20 p.Research output: Contribution to journal › Review › Research › peer-review
- Published
Detection of follicular transport of lidocaine and metabolism in adipose tissue in pig ear skin by DESI mass spectrometry imaging
D'Alvise, J., Mortensen, R., Hansen, S. H. & Janfelt, Christian, Jun 2014, In: Analytical and Bioanalytical Chemistry. 406, 15, p. 3735-42 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Natural products in Glycyrrhiza glabra (licorice) rhizome imaged at the cellular level by atmospheric pressure matrix-assisted laser desorption/ionization tandem mass spectrometry imaging
Li, B., Bhandari, D. R., Janfelt, Christian, Römpp, A. & Spengler, B., Oct 2014, In: Plant Journal. 80, 1, p. 161-71 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Azone® decreases the buccal mucosal permeation of Diazepam in a concentration-dependent manner via a reservoir effect
Meng-Lund, E., Jacobsen, Jette, Jin, L., Janfelt, Christian, Holm, R., Mullertz, Anette & Nicolazzo, J. A., 15 Feb 2014, In: Journal of Pharmaceutical Sciences. 103, 4, p. 1133-1141 103.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Studies of an insect model for drug metabolism by Desorption Electrospray Ionization Mass Spectrometry Imaging
Olsen, L. R., Hansen, S. H. & Janfelt, Christian, Aug 2014.Research output: Contribution to conference › Poster › Research
- 2015
- Published
Imaging of plant materials using indirect desorption electrospray ionization mass spectrometry
Janfelt, Christian, 2015, Mass Spectrometry Imaging of Small Molecules. He, L. (ed.). Humana Press, Vol. 1203. p. 91-7 7 p. (Methods in Molecular Biology).Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review
- Published
DESI-MS imaging of metabolites in various plant materials – a matter of sample preparation
Kato, L., Rook, F., Møller, Birger Lindberg, Hansen, S. H. & Janfelt, Christian, 2015.Research output: Contribution to conference › Poster › Research
- Published
Distribution of terfenadine and its metabolites in locusts studied by desorption electrospray ionization mass spectrometry imaging
Olsen, L. R., Hansen, S. H. & Janfelt, Christian, 2015, In: Analytical and Bioanalytical Chemistry. 407, 8, p. 2149–2158 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Topically applied methotrexate is rapidly delivered into skin by fractional laser ablation
Taudorf, E. H., Lerche, C., Vissing, A., Philipsen, P. A., Hannibal, Jens, D'Alvise, U. J. C., Hansen, S. H., Janfelt, Christian, Paasch, U., Anderson, R. R. & Hædersdal, Merete, 2015, In: Expert Opinion on Drug Delivery. 12, 7, p. 1059-1069 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2016
- Published
Aspects of Quantitation in Mass Spectrometry Imaging Investigated on Cryo-Sections of Spiked Tissue Homogenates
Hansen, H. T. & Janfelt, Christian, 2016, In: Analytical Chemistry. 88, 23, p. 11513−11520 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Interspecific variation in localization of hypericins and phloroglucinols in the genus Hypericum as revealed by desorption electrospray ionization mass spectrometry imaging
Kucharíková, A., Kimáková, K., Janfelt, Christian & Cellárová, E., 2016, In: Physiologia Plantarum. 157, 1, p. 2-12 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Mass spectrometry imaging of biomarker lipids for phagocytosis and signalling during focal cerebral ischaemia
Nielsen, M. M. B., Lambertsen, K. L., Clausen, B. H., Meyer, M., Bhandari, D. R., Larsen, S. T., Poulsen, Steen Seier, Spengler, B., Janfelt, Christian & Hansen, Harald S., 22 Dec 2016, In: Scientific Reports. 6, p. 1-14 14 p., 39571.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Cryo-sectioning of mice for whole-body imaging of drugs and metabolites with desorption electrospray ionization mass spectrometry imaging - a simplified approach
Okutan, S., Hansen, Harald S. & Janfelt, Christian, Jun 2016, In: Proteomics. 16, 11-12, p. 1633-41 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Characterization of midazolam metabolism in locusts: The role of CYP3A4-like enzyme in the formation of 1'-OH and 4-OH midazolam
Olsen, L. R., Gabel-Jensen, C., Wubshet, S. G., Kongstad, Kenneth Thermann, Janfelt, Christian, Badolo, L. & Hansen, S. H., 2016, In: Xenobiotica. 46, 2, p. 99–107 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Fractional laser-assisted drug delivery: Laser channel depth influences biodistribution and skin deposition of methotrexate
Taudorf, E. H., Lerche, C. M., Erlendsson, A. M., Philipsen, P. A., Hansen, S. H., Janfelt, Christian, Paasch, U., Anderson, R. R. & Hædersdal, Merete, Jul 2016, In: Lasers in Surgery and Medicine. 48, 5, p. 519-529 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2017
- Published
Combination of MALDI-MSI and cassette dosing for evaluation of drug distribution in human skin explant
Sørensen, I. S., Janfelt, Christian, Nielsen, M. M. B., Mortensen, R. W., Knudsen, N. Ø., Eriksson, A. H., Pedersen, A. J. & Nielsen, K. T., Aug 2017, In: Analytical and Bioanalytical Chemistry. 409, 21, p. 4993-5005 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Fractional laser-assisted topical delivery leads to enhanced, accelerated and deeper cutaneous 5-fluorouracil uptake
Wenande, E., Olesen, U. H., Nielsen, M. M. B., Janfelt, Christian, Hansen, S. H., Anderson, R. & Hædersdal, Merete, 2017, In: Expert Opinion on Drug Delivery. 14, 3, p. 307-317 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
- 2018
- Published
The intracellular localization of the vanillin biosynthetic machinery in pods of Vanilla planifolia
Gallage, N. J., Jørgensen, Kirsten, Janfelt, Christian, Nielsen, A. J. Z., Naake, T., Dunski, E., Dalsten, L., Grisoni, M. & Møller, Birger Lindberg, 2018, In: Plant and Cell Physiology. 59, 2, p. 304-318 15 p.Research output: Contribution to journal › Journal article › Research › peer-review
ID: 8407
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The Spatial Distribution of Alkaloids in Psychotria prunifolia (Kunth) Steyerm and Palicourea coriacea (Cham.) K. Schum Leaves Analysed by Desorption Electrospray Ionisation Mass Spectrometry Imaging
Research output: Contribution to journal › Journal article › Research › peer-review
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The intracellular localization of the vanillin biosynthetic machinery in pods of Vanilla planifolia
Research output: Contribution to journal › Journal article › Research › peer-review
Published -
185
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Mucoadhesive Electrospun Patch Delivery of Lidocaine to the Oral Mucosa and Investigation of Spatial Distribution in a Tissue Using MALDI-Mass Spectrometry Imaging
Research output: Contribution to journal › Journal article › Research › peer-review
Published