| 摘要 |
1527264 Immobilized proteins BECTON DICKINSON & CO 23 March 1976 [7 April 1975] 11660/76 Heading C3H [Also in Division B1 and G1] An assay reagent comprises antibody, preferably first bound to antigen to protect the active sites, covalently bound to a water-insoluble coating of a polymer such as dextran of molecular weight 70,000, the polymer being bound to a particulate substrate stable against dehydration and collapse, and comprising for example particles of glass of between 5 and 500 microns diameter having fixed to them a plurality of layers of microspheres of amorphous silica, alumina or thoria and from 5 millimicrons to 1 micron in size. |
