Christian Janfelt

Christian Janfelt

Associate Professor - Promotion Programme


Publication year:
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1 - 50 out of 95Page size: 50
  1. 2005

  2. 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

  3. 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

  4. 2006
  5. 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

  6. 2007
  7. 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

  8. 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

  9. 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

  10. 2008
  11. 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

  12. 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

  13. 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. 166-169

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. 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

  15. 2009
  16. 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

  17. 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

  18. 2010
  19. 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

  20. 2011
  21. 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. 3256-3259

    Research output: Contribution to journal › Letter › Research › peer-review

  22. 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. 178-183

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. 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. 1241-1246

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. 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

  25. 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. 402-410

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. 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. 10-12

    Research output: Contribution to journal › Journal article › Communication

  27. 2012
  28. 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

  29. Published

    Billeddannende massespektrometri til analyse af vævsprøver

    Janfelt, Christian, Wellner, N., D'Alvise, J. & Hansen, S. H., 2012, In: Dansk Kemi. 93, 8, p. 20-23

    Research output: Contribution to journal › Journal article › Research

  30. 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

  31. 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

  32. 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. 133-140

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. 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

  34. 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. 2667-2673

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. 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

  36. 2013
  37. 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. 15-22

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. 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

  39. 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

  40. 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

  41. 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

  42. 2014
  43. 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

  44. 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

  45. 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

  46. 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

  47. 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

  48. 2015
  49. 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

  50. 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

  51. 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

  52. 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

  53. 2016
  54. 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

  55. 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

  56. 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

  57. 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

  58. 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

  59. 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

  60. 2017
  61. 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

  62. 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

  63. 2018
  64. Published

    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

    Kato, L., Moraes, A. P., de Oliveira, C. M. A., Vaz, B. G., de Almeida Gonçalves, L., E Silva, E. C. & Janfelt, Christian, 2018, In: Phytochemical Analysis. 29, p. 69-76

    Research output: Contribution to journal › Journal article › Research › peer-review

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