Some Biological Effects of the Flavonoids*

Willaman, J. J.

doi:10.1002/jps.3030440705

Cited by 28 publications

(8 citation statements)

References 28 publications

(5 reference statements)

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“…However, should a ph ytochemical group other than alkaloids be selected for investigation, say the flavonols, the diversity of expected biological activities can be enormous. Willaman has surveyed the literature and has found that at least 137 natural flavonoids are known, occurring in some 62 familics, 153 genera, and 277 species of plants (415). Also, some 33 different pharniacologic or biological activities have been reported lor one or more of 30 favonoids (415).…”

Section: Phytociiemical Screening Approachesmentioning

confidence: 99%

“…This should be followed by a second test which might be the Liebcrmann reaction for the steroid nucleus. Assuming that a positive reaction was also noted, a third and confirniing test might he the Legal or Kedde test which denotes an unsaturated lactone a t (415), rutin is still the major useful member of this class of compounds as a medicinal agent. Several reviews on the biological acti vities and place in drug therapy of the Aavonoids have becn published (342, 344, 345, 415-418, ej55), as have essays on their economic nonmedicinal applications (656)(657)(658).…”

Section: Reactionmentioning

confidence: 99%

See 1 more Smart Citation

Biological and Phytochemical Screening of Plants

Farnsworth

1966

Journal of Pharmaceutical Sciences

815

436

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Section: Phytociiemical Screening Approachesmentioning

confidence: 99%

Section: Reactionmentioning

confidence: 99%

Biological and Phytochemical Screening of Plants

Farnsworth

1966

Journal of Pharmaceutical Sciences

815

436

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“…In addition, substances present in wood (e.g. polyphenoles) could be responsible for an antibacterial effect (Willaman 1955, Biswas et al 1981, Laks and McKaig 1988, Field et al 1989, Schrägle and Müller 1990, Scalbert 1991, Müller et al 1995.…”

Section: Introductionmentioning

confidence: 99%

Wooden boards affecting the survival of bacteria?

Schönwälder¹,

Kehr²,

Wulf³

et al. 2002

Holz als Roh- und Werkstoff

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The survival of bacteria on and in different wooden and plastic boards was examined by microbiological methods. Wood of different tree species and polyethylene were inoculated with Escherichia coli pIE639 and Enterococcus faecium as hygienically relevant test bacteria. The development of the bacterial titer was evaluated by culturing on agar contact plates and investigating wood shavings. Survival of the test bacteria depended on different factors such as tree species, the initial inoculum size and the characteristics of the inoculated strain. The bacterial titer decreased fastest on pine compared to other woods (spruce, beech, poplar) and plastic. After bacterial infestation only pine wood was germ-free at the surface and in the inner structure after a few hours. The survival of the bacteria on poplar and beech was comparable to their survival on plastic. The study indicated that an antibacterial effect of wood, especially for pine, is caused by the hygroscopic properties of wood and the wood extractives. The antibacterial effect of pine wood was not influenced by the storage time of the wood following harvest or the functional condition of the wood up to a germ load of 10 8 CFU/cm 2 E. coli pIE639. Beinflussen Holzbretter das Überleben von Bakterien? Das Ü berleben von Bakterien auf und in verschiedenen Brettchen aus Holz und Kunststoff wurde mit mikrobiologischen Methoden untersucht. Verschiedene Holzarten und Polyethylen wurden mit Escherichia coli pIE639 und Enterococcus faecium als hygienisch relevante Testbakterien beimpft. Die Entwicklung des Bakterientiters ist durch Abklatschproben und Untersuchung von Hobelspänen verfolgt worden. Das Ü berleben der Testbakterien war dabei von verschiedenen Faktoren abhängig, wie z.B. von der Holzart, der Animpfdichte und der Art des inokulierten Bakterienstamms. Der Bakterientiter nahm im Vergleich zu anderen Holzarten (Fichte, Buche, Pappel) und Kunststoff am schnellsten auf Kiefernholz ab. Nur Kiefernholz war innerhalb weniger Stunden an der Oberfläche und im Innern des Holzes keimfrei. Das Ü berleben der Bakterien auf Pappel-und Buchenholz war mit dem Ü berleben der Bakterien auf Kunststoff vergleichbar. Die Studie deutet auf eine antibakterielle Wirkung von Holz hin, besonders von Kiefernholz, aufgrund der hygroskopen Eigenschaften von Holz und der Wirkung von Holzinhaltsstoffen. Die antibakterielle Wirkung von Kiefernholz wurde durch die Dauer der Lagerung nach der Holzernte und den Gebrauchszustand der Brettchen bis zu einer Keimbelastung von 10 8 CFU/cm 2 E. coli pIE639 nicht beeinflusst.

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“…Quercetin is among a large number of flavonoid compounds commonly found in a variety of fruits and vegetables (Kuhnau, 1976). These flavonoid compounds have manifold biological properties and have been used as diuretics, heart stimulants, antiviral agents, antitumour agents and antihistaminics (Willaman, 1955). Quercetin itself has anti-inflammatory properties, inhibits NADPH oxidase in neutrophils and will decrease spontaneous lipid peroxidation following glutathione depletion in rats (Beretz et al, 1982;Tauber, 1984;Younes & Sigers, 1981).…”

Section: Eflect Of Quercetin On T-2-mycotoxin-induced Mortality In mentioning

confidence: 99%