نتایج جستجو برای: flavones
تعداد نتایج: 1217 فیلتر نتایج به سال:
Remarkable ability of Pandoraea pnomenusa B356 biphenyl dioxygenase to metabolize simple flavonoids.
Many investigations have provided evidence that plant secondary metabolites, especially flavonoids, may serve as signal molecules to trigger the abilities of bacteria to degrade chlorobiphenyls in soil. However, the bases for this interaction are largely unknown. In this work, we found that BphAE(B356), the biphenyl/chlorobiphenyl dioxygenase from Pandoraea pnomenusa B356, is significantly bett...
Flavonoid composition during the ontogenetic cycle was examined in Pyracantha coccinea. The flavonoid profiles of plants at different ages showed marked differences in aerial and hypogeal parts. In the vegetative phase there are flavonoids (flavanones, flavones, and flavonols) only in the aerial parts and they appear gradually during the plant life. These secondary metabolites are detectable in...
Fluorophotometric Determination of Rutin and Other Flavones: Anthony J. Glasko, Foster Adair, Evangeline Papageorge, and George T. Lewis ................... 48 Metabolism Cages: F. W. Kinard, R. N. Danielson, and J. A. Warren ................................... 49 Sharp Interfacial Precipitin Reactions in Capillary Pipettes: Homer F. Swift .......................... 49 Warm Safranine for Plant ...
Flavones were directly alkylated at the C-3 position in moderate yields using a xanthate-based oxidative radical addition procedure. This methodology is a suitable synthetic tool for the direct substitution of the vinylic and unactivated C-H bond of the C ring of the flavone by an alkyl functionality under neutral conditions.
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