| | 2 | Author
| Milena Velikova3, Vassya Bankova, Kadriye Sorkunb, Saadi Houcinec, Iva Tsvetkovad, A. Kujumgievd | Requires cookie* | | | Title
| Propolis from the Mediterranean Region: Chemical Composition and Antimicrobial Activity  | | | | Abstract
| The chemical composition of propolis from Bulgaria, Turkey, Greece and Algeria was investigated by GC-MS. All of them contained mainly flavonoids and esters of caffeic and ferulic acids, which indicated that their main source are buds of poplars of the taxonomic section Aegieros. Some Turkish samples contained a low percent of diterpenic acids, while in Algerian samples significant amounts of a hydroxyditerpenic acid (M=322, its structure not determined by its MS) were found. All samples showed significant antibacterial and weak to moderate antifungal activity. | | | |
Reference
| Z. Naturforsch. 55c, 790—793 (2000); received May 10/June 19 2000 | | | |
Published
| 2000 | | | |
Keywords
| Propolis, Populus, Antimicrobial Activity | | | |
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| | | | | TEI-XML for
| default:Reihe_C/55/ZNC-2000-55c-0790.pdf | | | | Identifier
| ZNC-2000-55c-0790 | | | | Volume
| 55 | |
| 3 | Author
| Ahm Ed, G. Hegazi, FatenK. Abd, El Hady | Requires cookie* | | | Title
| Egyptian Propolis: 1-Antimicrobial Activity and Chemical Composition of Upper Egypt Propolis | | | | Abstract
| The antimicrobial activity of four propolis samples collected from Upper Egypt against Staphylococcus aureus; Escherichia coli and Candida albicans was evaluated. There was a variation in the antimicrobial activity according to the propolis origin. Banisweif propolis showed the highest antimicrobial activity against Staphylococcus aureus, Escherichia coli and Candida albicans, but Fayoum propolis had moderate activity against all tested pathogens. Propolis collected from Assiut and Souhag gave lower antimicrobial activity. Propolis samples were investigated by GC/MS, 71 compounds were identified, 14 being new for propolis. Banisweif propolis is characterized by the presence of 7 caffeate esters and 4 triterpenoids. Fayoum propolis showed the highest amount of lactic acid and the presence of 3 chalcones. But Assiut propolis is characterized by the presence of 4 prenylated coumar-ates. Souhag propolis is characterized by the presence of 5 aliphatic dicarboxylic acids and some other new compounds to propolis. | | | |
Reference
| Z. Naturforsch. 56c, 82—88 (2001); received July 24/October 9 2000 | | | |
Published
| 2001 | | | |
Keywords
| Propolis, Polyphenols, Antimicrobial Activity | | | |
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| default:Reihe_C/56/ZNC-2001-56c-0082.pdf | | | | Identifier
| ZNC-2001-56c-0082 | | | | Volume
| 56 | |
| 6 | Author
| O. Spring, J. Kupka, B. M. Aier, A. Hager | Requires cookie* | | | Title
| Helianthus annuus: Antimicrobial and Cytotoxic Properties; Influence on DNA, RNA, and Protein Synthesis | | | | Abstract
| Sesquiterpene lactones, produced in light and capable o f inhibiting auxin-induced elongation growth o f coleoptile and hypocotyl segments, were isolated from young leaves o f Helianthus annuus (Spring and Hager, Planta in press, 1982). These com pounds have an antibiotic effect on gram-negative and gram -positive bacteria as | | | |
Reference
| Z. Naturforsch. 37c, 1087—1091 (1982); received August 31 1982 | | | |
Published
| 1982 | | | |
Keywords
| Helianthus annuus, C om positae, Sesquiterpene Lactones, Antimicrobial Activity, Cytotoxicity | | | |
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| | | | | TEI-XML for
| default:Reihe_C/37/ZNC-1982-37c-1087.pdf | | | | Identifier
| ZNC-1982-37c-1087 | | | | Volume
| 37 | |
| 7 | Author
| Susanne Valcic3, Gloria Montenegro15, Ana-Maria Mujicab, Guacolda Avilab, Scott Franzblauc, MayaP. Singhd, WilliamM. Maiesed, BarbaraN. Timmermann3 | Requires cookie* | | | Title
| Phytochemical, Morphological, and Biological Investigations of Propolis from Central Chile | | | | Abstract
| Propolis from Central Chile was investigated for its plant origin by microscopical analysis of pollen grains and leaf fragments found in the sample. The pollen grains that appear with significant higher frequency in the sample corresponded to four native and two introduced species, whereas leaf fragments corresponded to four native species. Seventeen phenolic com pounds that belong to the phenylpropane, benzaldehyde, dihydrobenzofuran, or benzopyran classes, were isolated from an organic extract that was found to have a moderate growth inhibitory activity against M ycobacterium avium , M. tuberculosis, and two strains of S taphylo coccus aureus. The components responsible for activity were determined. | | | |
Reference
| Z. Naturforsch. 54c, 406 (1999); received October 29 1998/February 15 1999 | | | |
Published
| 1999 | | | |
Keywords
| Propolis, Central Chile, Microscopical Analysis, Isolation, Phenylpropanes, Dihydrobenzofurans, Benzopyrans, Antimicrobial Activity | | | |
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| default:Reihe_C/54/ZNC-1999-54c-0406.pdf | | | | Identifier
| ZNC-1999-54c-0406 | | | | Volume
| 54 | |
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