The Mikulski Archive for Space Telescopes (MAST) is a NASA funded project to
support and provide to the astronomical community a
variety of astronomical data archives ,
with the primary focus on scientifically related data
sets in the optical, ultraviolet, and near-infrared parts of the spectrum.
MAST is located at the Space Telescope Science Institute (STScI).
Search Using the MAST Data Discovery Portal
Antihistamine drugs act by blocking the action of histamine on nerve endings. Cromoglicate-based drugs (sodium cromoglicate, nedocromil) block a calcium channel essential for mast cell degranulation, stabilizing the cell and preventing release of histamine and related mediators. Leukotriene antagonists (such as montelukast and zafirlukast) block the action of leukotriene mediators, IgE antibody (omalizumab) also inhibits the binding of free IgE to the high-affinity IgE receptor (FcεRI) on the surface of mast cells and basophils, and are being used increasingly in allergic diseases.
Modern masts form the leading edge of a sail's airfoil and tend to have a teardrop-shaped cross-section. On smaller racing yachts and catamarans, the mast rotates to the optimum angle for the sail's airfoil. If the mast has a long, thin cross-section and makes up a significant area of the airfoil, it is called a wing-mast; boats using these have a smaller sail area to compensate for the larger mast area. There are many manufacturers of modern masts for sailing yachts of all sizes, a few notable companies are Hall Spars, Offshore Spars , and Southern Spars.