Alfons Lefeber
Onderzoekstechnicus
- Naam
- A.W.M. Lefeber
- Telefoon
- +31 71 527 4638
- a.w.m.lefeber@lic.leidenuniv.nl
Onderzoekstechnicus
- Wiskunde en Natuurwetenschappen
- Leiden Institute of Chemistry
- LIC/Diensten
- LIC/D/NMR-department
- Paige U.B.A. le, Smits B., Hart P. 't, Lefeber A.W.M., Martin N.I. & Ingen H. van (2017), Weak coupling between magnetically inequivalent spins: the deceptively simple, complicated spectrum of a C-13-labeled trimethylated amine, Journal of Magnetic Resonance 278: 96-103.
- Haverkate L.A., Zbiri M., Johnson M.R., Deme B., Groot H.J.M. de, Lefeber A.W.M., Kotlewski A., Picken S.J., Mulder F.M. & Kearley G.J. (2012), On the morphology of a discotic liquid crystalline charge transfer complex, The Journal of Physical Chemistry B 116(43): 13098-13105.
- Simoh S., Linthorst H.J.M., Lefeber A.W.M., Erkelens C., Kim H.K., Choi Y.H. & Verpoorte R. (2010), Metabolic changes of Brassica rapa transformed with bacterial isochorismate synthase gene, J. Plant Physiol. 167: 1525-1532.
- Mustafa N.R., Kim H.K., Choi Y.H., Erkelens C., Lefeber A.W.M., Spijksma G., Heijden R. van der & Verpoorte R. (2009), Retrobiosynthetic investigation of salicylic acid production in Catharanthus roseus cell, Phytochemistry 70: 532-539.
- Dao T.H.H., Puig R.C., Kim H.K., Erkelens C., Lefeber A.W.M., Linthorst H.J.M., Choi Y.H. & Verpoorte R. (2008), Effect of benzothiadiazole on the metabolome of Arabidopsis thaliana, Plant Physiology and Biochemistry : .
- Mustafa N.R., Kim H.K., Choi Y.H., Erkelens C., Lefeber A.W.M., Spijksma G., Heijden R. van der & Verpoorte R. (2008), Retrobiosynthetic investigation of salicylic acid production in Catharanthus roseus cell, Phytochemistry : .
- Khatib A., Wilson E.G., Kim H.K., Lefeber A.W.M., Erkelens C., Choi Y.H. & Verpoorte R. (2006), Application of two dimensional J-resolved nuclear magnetic resonance spectrum to differentiation of beer, Analytica Chimica Acta 559: 264-270.
- Liang Y.-S., Lefeber A.W.M., Erkelens C., Kim H.K., Choi Y.H. & Verpoorte R. (2006), Identification of phenylpropanoids in Brassica rapa leaves treated with methyl jasmonate using two-dimensional nuclear magnetic resonance spectroscopy, Journal of Chromatography A 1112: 148-155.
- Widarto H.T., Meijden E. van der, Lefeber A.W.M., Erkelens C., Kim H.K., Choi Y.H. & Verpoorte R. (2006), Metabolomic differentiation of Brassica rapa following herbivory by different insect instars using two dimensional nuclear magnetic resonance spectroscopy, Journal of Chemical Ecology 32(11): 2417-2428.
- Widarto H.T., Meijden E. van der, Lefeber A.W.M., Erkelens C., Kim H.K., Choi Y.H. & Verpoorte R. (2006), Metabolomic differentiation of Brassica rapa leaves attacked by herbivore using two dimensional nuclear magnetic resonance spectroscopy, Journal of Chemical Ecology 32: 2417-2428.
- Yang S.Y., Kim H.K., Lefeber A.W.M., Erkelens C., Angelova N.S., Choi Y.H. & Verpoorte R. (2006), Application of Two Dimensional Nuclear Magnetic Resonance Spectroscopy to Quality Control of Ginseng Commercial Products, Planta Medica 72: 364-369.
- Hendrawati O., Yao Q., Choi Y.H., Kim H.K., Linthorst H.J.M., Erkelens C., Lefeber A.W.M. & Verpoorte R. (2006), Metabolic differentiation of Arabidopsis treated with methyl jasmonate using nuclear magnetic resonance spectroscopy, Plant Science 170: 1118-1124.
- Choi Y.H., Kim H.K., Verpoorte R., Linthorst H.J.M., Hollander J., Lefeber A.W.M., Erkelens C. & Nuzillard J.-M. (2006), NMR metabolomics to revisit the tobacco mosaic virus infection in Nicotiana tabacum leaves, 69: 742-742.
- Hendrawati O., Yao Q., Kim H.K., Linthorst H.J.M., Erkelens C., Lefeber A.W.M., Choi Y.H. & Verpoorte R. (2006), Metabolic differentiation of Arabidopsis treated with methyl jasmonate using nuclear magnetic resonance spectroscopy, Plant Science 170: 1118-1124.
- Kim H.K., Choi Y.H., Erkelens C., Lefeber A.W.M. & Verpoorte R. (2005), Metabolic fingerprinting of Ephedra species using 1H-NMR spectroscopy and principle component analysis, Chemical and pharmaceutical bulletin 53: 105-109.
- Choi Y.H., Sertic S., Kim H.K., Wilson E.G., Michopoulosa F., Lefeber A.W.M., Erkelens C., Kricun S.D.P. & Verpoorte R. (2005), Classification of Ilex species based on metabolomic fingerprinting using NMR and multivariate data analysis, Journal of Agricultural and Food Chemistry 53: 1237-1245.
- Choi Y.H., Choi H.-K., Peltenburg-Looman A.M.G., Lefeber A.W.M. & Verpoorte R. (2004), Quantitative analysis of ginkgolic acids from Ginkgo leaves and products using 1HNMR, Phytochemical Analysis 15: 325-330.
- Frederich M., Choi Y.H., Angenot L., Harnischfeger G., Lefeber A.W.M., Erkelens C. & Verpoorte R. (2004), Metabolomic analysis of Strychnos nux-vomica, Strychnos icaja and Strychnos ignatii extracts by 1 H nuclear magnetic resonance spectrometry and multivariate analysis techniques, Phytochemistry 65: 1993-2001.
- Choi H.-K., Choi Y.H., Verberne M., Lefeber A.W.M., Erkelens C. & Verpoorte R. (2004), Metabolic fingerprinting of wild type and transgenic tobacco plants by 1H NMR and multivariate analysis technique, Phytochemistry 65: 857-864.
- Choi Y.H., Kim H.K., Hazekamp A., Erkelens C., Lefeber A.W.M. & Verpoorte R. (2004), Metabolomic Differentiation of Cannabis sativa Cultivars Using 1H-NMR and Principal Component Analysis, J. Nat. Prod. 67: 953-957.
- Choi Y.H., Casas Tapias E., Kim H.K., Lefeber A.W.M., Erkelens C., Verhoeven J.TH.J., Brzin J., Zel J. & Verpoorte R. (2004), Metabolic discrimination of Catharanthus roseus leaves infected by phytoplasma using 1HNMR spectroscopy and multivariate data analysis, 135: 2398-2410.
- Choi Y.H., Hazekamp A., Peltenburg-Looman A.M.G., Frederich M., Erkelens C., Lefeber A.W.M. & Verpoorte R. (2004), NMR Assignment of major cannabinoids and cannbiflavonoids isolated from Cannabis sativa flowers, Phytochemical Analysis 15: 345-354.
- Han Y.S., Heijden R. van der, Lefeber A.W.M., Erkelens C. & Verpoorte R. (2002), Biosynthesis of antrhraquinones in Cell Cultures of Cinchona Robusta proceeds via the Methylerythritol 4-Phosphate Pathway, Phytochemistry 59: 45-55.
- Contin A., Heijden R. van der, Lefeber A.W.M. & Verpoorte R. (1998), The iridoid glucoside secologanin is derived from the novel triose phosphate/pyruvate pathway in a Catharanthus roseus cell culture, FEBS Letters 434: 413-416.