L Krenn

Summary

Affiliation: University of Vienna
Country: Austria

Publications

  1. ncbi An efficient HPLC method for the quantification of isoflavones in soy extracts and soy dietary supplements in routine quality control
    L Krenn
    Department of Pharmacognosy, University of Vienna, Austria
    Pharmazie 61:582-5. 2006
  2. ncbi [Passion Flower (Passiflora incarnata L.)--a reliable herbal sedative]
    Liselotte Krenn
    Institut für Pharmakognosie, Universitat Wien, Althanstrasse 14, A 1090 Wien
    Wien Med Wochenschr 152:404-6. 2002
  3. ncbi Science in drug control: the alkaloid content of afghan opium
    Barbara Remberg
    Laboratory and Scientific Section, Division for Policy Analysis and Public Affairs, United Nations Office on Drugs and Crime, P O Box 500, A 1400 Vienna
    Chem Biodivers 5:1770-9. 2008
  4. ncbi Chemotaxonomic relevance of cardenolides in Urginea fugax
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, PharmaCenterVienna, Althanstrasse 14, A 1090 Vienna, Austria
    Phytochemistry 65:2881-4. 2004
  5. ncbi Anthrone C-glucosides from Rheum emodi
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Austira
    Chem Pharm Bull (Tokyo) 52:391-3. 2004
  6. ncbi Flavonoids from Achillea nobilis L
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Pharmacy Center, Althanstrasse 14, A 1090 Vienna, Austria
    Z Naturforsch C 58:11-6. 2003
  7. ncbi Quantification of isoflavones in red clover by high-performance liquid chromatography
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Althanstrasse 14, A 1090, Vienna, Austria
    J Chromatogr B Analyt Technol Biomed Life Sci 777:123-8. 2002
  8. ncbi Anthocyanin- and proanthocyanidin-rich extracts of berries in food supplements--analysis with problems
    L Krenn
    Department of Pharmacognosy, University of Vienna, Austria
    Pharmazie 62:803-12. 2007
  9. ncbi Contribution of methylated exudate flavonoids to the anti-inflammatory activity of Grindelia robusta
    Liselotte Krenn
    Department of Pharmacognosy, University of Vienna, PharmaCenter Vienna, Vienna, Austria
    Fitoterapia 80:267-9. 2009
  10. ncbi New bufadienolides from Urginea maritima sensu strictu
    L Krenn
    Institute of Pharmacognosy, University of Vienna, Pharmacy Center, Althanstrasse 14, A 1090 Vienna, Austria
    Fitoterapia 71:126-9. 2000

Collaborators

  • Brigitte Kopp
  • M F Melzig
  • Hanspeter Kählig
  • Anca Miron
  • Heinz H Pertz
  • E Wollenweber
  • H R Adhami
  • Martin Holbik
  • Manuela Gridling
  • Judith Virtbauer
  • Barbara Remberg
  • Dietrich H Paper
  • Elke Marchart
  • T Linder
  • D Kasaj
  • D Schuster
  • M Zehl
  • H Kaehlig
  • Ruxandra Popescu
  • Stanimira Krasteva
  • Karl Heinz Wagner
  • Georg Krupitza
  • Nina Mayer
  • Antje Hufner
  • Oliver Donath
  • Brigitte Marian
  • Anna Freni Sterrantino
  • Christoph Janitsch
  • Robert Artner
  • Elisabeth Karall
  • Michaela Kremser
  • S Prinz
  • E Haslinger
  • S S Yu

Detail Information

Publications20

  1. ncbi An efficient HPLC method for the quantification of isoflavones in soy extracts and soy dietary supplements in routine quality control
    L Krenn
    Department of Pharmacognosy, University of Vienna, Austria
    Pharmazie 61:582-5. 2006
    ..Accompanying substances do not interfere. The method was applied to the analysis of different commercial soy preparations...
  2. ncbi [Passion Flower (Passiflora incarnata L.)--a reliable herbal sedative]
    Liselotte Krenn
    Institut für Pharmakognosie, Universitat Wien, Althanstrasse 14, A 1090 Wien
    Wien Med Wochenschr 152:404-6. 2002
    ..Based on pharmacological data, the experiences of traditional use and the use in combinations Passiflora extracts are an important factor in the phytotherapy of tenseness, restlessness and irritability with difficulty in falling asleep...
  3. ncbi Science in drug control: the alkaloid content of afghan opium
    Barbara Remberg
    Laboratory and Scientific Section, Division for Policy Analysis and Public Affairs, United Nations Office on Drugs and Crime, P O Box 500, A 1400 Vienna
    Chem Biodivers 5:1770-9. 2008
    ..More than 75% of the samples contained above 10% of morphine, the overall average was 14.4%...
  4. ncbi Chemotaxonomic relevance of cardenolides in Urginea fugax
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, PharmaCenterVienna, Althanstrasse 14, A 1090 Vienna, Austria
    Phytochemistry 65:2881-4. 2004
    ..The chemotaxonomic relevance of the occurrence of cardenolides in the genus Urginea is discussed...
  5. ncbi Anthrone C-glucosides from Rheum emodi
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Austira
    Chem Pharm Bull (Tokyo) 52:391-3. 2004
    ..Additionally the investigation resulted in the isolation of an acetylated chrysophanol glucoside, 8-O-beta-D-(6'-O-acetyl)glucopyranosyl-chrysophanol (7). The structures were established by comprehensive spectroscopic investigations...
  6. ncbi Flavonoids from Achillea nobilis L
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Pharmacy Center, Althanstrasse 14, A 1090 Vienna, Austria
    Z Naturforsch C 58:11-6. 2003
    ..The structures were established either by comparison with authentic substances or by UV, 1H NMR and 13C NMR spectroscopic methods including 2D-NMR techniques and ESI-MS...
  7. ncbi Quantification of isoflavones in red clover by high-performance liquid chromatography
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Althanstrasse 14, A 1090, Vienna, Austria
    J Chromatogr B Analyt Technol Biomed Life Sci 777:123-8. 2002
    ..The method was applied to the analysis of different red clover cultivars...
  8. ncbi Anthocyanin- and proanthocyanidin-rich extracts of berries in food supplements--analysis with problems
    L Krenn
    Department of Pharmacognosy, University of Vienna, Austria
    Pharmazie 62:803-12. 2007
    ..The analytical methods currently used for the identification and quantification of the polyphenols in these berries are described, including an evaluation of their advantages and disadvantages...
  9. ncbi Contribution of methylated exudate flavonoids to the anti-inflammatory activity of Grindelia robusta
    Liselotte Krenn
    Department of Pharmacognosy, University of Vienna, PharmaCenter Vienna, Vienna, Austria
    Fitoterapia 80:267-9. 2009
    ..Quercetin-3-methylether was shown to be most active with an IC(50) of 19 microM, thus obviously contributing to the anti-inflammatory activity of the drug...
  10. ncbi New bufadienolides from Urginea maritima sensu strictu
    L Krenn
    Institute of Pharmacognosy, University of Vienna, Pharmacy Center, Althanstrasse 14, A 1090 Vienna, Austria
    Fitoterapia 71:126-9. 2000
    ....
  11. ncbi In vitro antispasmodic and anti-inflammatory effects of Drosera rotundifolia
    Liselotte Krenn
    Institut für Pharmacognosie, Universitat Wien, Austria
    Arzneimittelforschung 54:402-5. 2004
    ..In guinea-pig ileum the extracts led to an antispasmodic effect possibly by affecting an allosteric binding site of the muscarinic M3 receptors...
  12. ncbi Bufadienolides from Urginea maritima from Egypt
    B Kopp
    Institute of Pharmacognosy, University of Vienna, Austria
    Phytochemistry 42:513-22. 1996
    ....
  13. ncbi Quantification of the flavonoid glycosides in Passiflora incarnata by capillary electrophoresis
    Elke Marchart
    Institute of Pharmacognosy, University of Vienna, Vienna, Austria
    Planta Med 69:452-6. 2003
    ..The total flavonoid contents determined with the new method correlated satisfactorily with those achieved by the spectrophotometric assay according to the European Pharmacopoeia...
  14. ncbi Flavon- and flavonolglycosides from Achillea pannonica Scheele
    D Kasaj
    Institute of Pharmacognosy, University of Vienna, Pharmacy Center, Austria
    Z Naturforsch C 56:521-5. 2001
    ..This substance is reported for the first time in the genus Achillea. Chemotaxonomic aspects are discussed briefly...
  15. ncbi Sulfemodin 8-O-beta-D-glucoside, a new sulfated anthraquinone glycoside, and antioxidant phenolic compounds from Rheum emodi
    Liselotte Krenn
    Institute of Pharmacognosy, University of Vienna, Pharmacy-Center, Althanstrasse 14, A-1090 Vienna, Austria
    J Nat Prod 66:1107-9. 2003
    ..Compounds 2 and 3 showed significant antioxidant activity in the DPPH assay, while chrysophanol, physcion, and emodin and their 8-O-glucosides were found to be inactive...
  16. ncbi Catechol alkenyls from Semecarpus anacardium: acetylcholinesterase inhibition and binding mode predictions
    H R Adhami
    Department of Pharmacognosy, University of Vienna, Althanstrasse 14, A 1090 Vienna, Austria
    J Ethnopharmacol 139:142-8. 2012
    ..The fruits of Semecarpus anacardium L. f. (Anacardiaceae) are used in Ayurvedic medicine and also in Iranian Traditional Medicine for various indications, among those for retarding and treatment of dementia...
  17. ncbi Chemical and pharmacological investigations of Metaxya rostrata
    Judith Virtbauer
    Department of Pharmacognosy, University of Vienna, Althanstrasse 14, A 1090 Vienna, Austria
    Z Naturforsch C 63:469-75. 2008
    ..Additionally, sugars, common sterols, such as sitosterol, stigmasterol and campesterol, as well as chlorogenic acid and caffeic acid were identified in Metaxya rostrata...
  18. ncbi Anti-leukaemic effects of two extract types of Lactuca sativa correlate with the activation of Chk2, induction of p21, downregulation of cyclin D1 and acetylation of alpha-tubulin
    Manuela Gridling
    Institute of Clinical Pathology, Medical University of Vienna, Vienna, Austria
    Oncol Rep 23:1145-51. 2010
    ..The calculated amount for human intake would require approximately 3 kg lettuce to reach the required concentration shown to inhibit 50% HL-60 proliferation...
  19. ncbi Apparently no sedative benzoflavone moiety in passiflorae herba
    Martin Holbik
    Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria
    Planta Med 76:662-4. 2010
    ....
  20. ncbi Comparison of the antiinflammatory effects of Drosera rotundifolia and Drosera madagascariensis in the HET-CAM assay
    Dietrich H Paper
    Lehrstuhl fur Pharmazeutische Biologie, Institut fur Pharmazie, Universitat Regensburg, D 93040 Regensburg, Germany
    Phytother Res 19:323-6. 2005
    ..The chemical analyses of the extracts showed that the effect cannot be attributed to naphthoquinones, but might be due to flavonoids. Ellagic acid obviously plays an important role in the antiangiogenic effect of the Drosera extracts...