Karin Mann

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In botany textbooks the farinose coating on leaves and inflorescences of many Primula species is still often said to "consist of flavone". We have shown earlier [1, 2] that it is in fact formed by varying amounts of unsubstituted flavone (at least 50%), 5-hydroxy flavone and 2'-hydroxy flavone, accompanied in many species by 5,8-dihydroxy flavone (primetin)(More)
The ABRF amino acid analysis study evaluated the general utility of amino acid analysis (AAA) for identification of proteins after denaturing gel electrophoresis and electroblotting to polyvinylidene difluoride (PVDF) membrane.Thirty-eight participating laboratories analyzed a known control (ovalbumin, 5 microg applied to the gel) and either lysozyme or(More)
Members o f the genus Cistus excrete a leaf resin that consists mainly o f terpenoids. This resin also contains methylated flavonoids as aglycones. Rare methyl deri­ vatives o f myricetin have been isolated from C. monspeliensis, along with uncommon methyl derivatives o f quercetin. Further flavonoids encountered in the leaf resin of this and six further(More)
The presence of flavonoid aglycones in bud ex­ cretions has been stressed and they have been stud­ ied in great detail by one of us in the 1970s. Exu­ date flavonoids were reported for members of the genera Aesculus (Hippocastanaceae, [1]), for Alnus, Betula, and Ostrya (Betulaceae, see [2]), for Populus (Salicaceae; see e.g. [3] and ref. therein), for(More)
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