An apiary (also known as a bee yard) is a place where beehives of honey bees are kept. Traditionally beekeepers (also known as apiarists) paid land rent in honey for the use of small parcels. Some farmers will provide free apiary sites, because they need pollination, and farmers who need many hives often pay for them to be moved to the crops when they bloom. Can also be a wall-less, roofed structure, similar to a gazebo. Location For pollination, apiaries are rarely set up; the bees are only present during the bloom period of the crop. But in a few cases, such as for organic farms, long ...

Levonorgestrel (or l-norgestrel or D-norgestrel) (Plan B, Next Choice, and others) is a second generation synthetic progestogen used as an active ingredient in some hormonal contraceptives. Chemistry Levonorgestrel (levo=left) is one form of a hormone that exists in two mirror image left and right forms. Chemically, it is a hormonally active levorotatory enantiomer of the racemic mixture norgestrel. It is a gonane progestin derived from 19-nortestosterone. Its in vitro relative binding affinities at human steroid hormone receptors are: 323% that of progesterone at the progesterone r...