https://www.selleckchem.com/pr....oducts/Rapamycin.htm
Compared with the bird flowers in the Old World (OW), the New World (NW) ones are less conspicuous to bees and maybe more conspicuous not only to VS-birds (violet-sensitive) but also to UVS-birds (ultraviolet-sensitive). These differences can be explained by the different properties of the secondary reflectance peak (SP). SP intensity is higher in red flowers pollinated by bees than those pollinated by birds (especially the NW bird flowers). A transition from high-SP to low-SP in red flowers can induce chromatic contrast changes, with
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