caa a22 4500 469026189 CHVBK 20180323132730.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01970171 doi (NATIONALLICENCE)springer-10.1007/BF01970171 Antimicrobial screening of essential oils and extracts of some Humulus lupulus L. cultivars [Elektronische Daten] [C. Langezaal, A. Chandra, J. Scheffer] The essential oils as well as solvent extracts of 11 hop cultivars, 1 hop variety and a wild type of hop were screened for their antimicrobial activities using the agar overlay technique. The oils were isolated from the cones of the various hop plants by hydrodistillation, the extracts were obtained by soaking the hop cones in chloroform. The oils and the extracts showed activity against the Gram-positive bacteria (Bacillus subtilis andStaphylococcus aureus) and the fungus (Trichophyton mentagrophytes var.interdigitale), but almost no activity against the Gram-negative bacterium (Escherichia coli) and the yeast (Candida albicans) used in the screening. The peak area percentages of the main volatile components and the contents of the bitter acids of the extracts were determined for all cultivars using chromatographic methods. Royal Dutch Association for Advancement of Pharmacy, 1992 Agar overlay technique nationallicence Antibiotics nationallicence Drug screening nationallicence Essential oil nationallicence Humulus lupulus L nationallicence Langezaal C. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut Chandra A. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut Scheffer J. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut Pharmaceutisch Weekblad Kluwer Academic Publishers 14/6(1992-12-01), 353-356 0031-6911 14:6<353 1992 14 11096 https://doi.org/10.1007/BF01970171 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01970171 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Langezaal C. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut NATIONALLICENCE 700 1- Chandra A. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut NATIONALLICENCE 700 1- Scheffer J. Division of Pharmacognosy, Center for Bio-Pharmaceutical Sciences, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300, RA Leiden, the Netherlands aut NATIONALLICENCE 773 0- Pharmaceutisch Weekblad Kluwer Academic Publishers 14/6(1992-12-01), 353-356 0031-6911 14:6<353 1992 14 11096 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer