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Chemical constituents and free radical scavenging activity of corn pollen collected from Apis mellifera hives compared to floral corn pollen at Nan, Thailand

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Figure 1 Comparison of the (A, C) A. mellifera harvested bee pollen with that of (B, D) corn pollen by SEM showing (A, B) the externalmorphology (1000 x magnification) and (C, D) the germination pore and ornamentation of the pollen exine (5000 x magnification).Micrographs shown are representative of those seen from 10 independent pollen grains.
Table 1 The weight and the character of the three crudesolvent extracts from bee pollen and corn pollen
Table 2 The EC50 values for the free radical scavengingactivity of three different crude extracts from bee pollenand corn pollen, plus the reference standard (ascorbicacid) for comparison
Table 4 The percentage scavenging activity of the crude DCM extract of bee pollen (CDEb) and its subfractions(CDEb1 - CDEb7) following silica gel 60 quick column chromatography
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