Abstract: Biologically active reagents are prepared from particles of copolymers having highly active succinimid groups. The reagents are prepared by covalently attaching biologically active substances, for example antibodies, to the particles, directly or indirectly through amide groups by displacement of highly active succinimid groups on the particle surface. These reagents are used to advantage in analytical elements, methods for the detection of specific binding ligands (such as immunological species) and immunoassays, and in purification methods such as affinity chromatography.

Abstract: A method of controlling fungus is provided which comprises contacting said fungus with a fungicidally effective amount of a compound having the following structure: ##STR1## wherein R is a halogen atom, andR.sup.1 is selected from the group consisting of substituted or unsubstituted, straight or branched alkyl having from about 1 to 6 carbon atoms,alkoxy having from about 1 to 6 carbon atoms,halo, provided that when any R.sup.1 is chloro, n is 2 and at least one R.sup.1 is meta-chloro,substituted or unsubstituted sulfamoyl, andsubstituted or unsubstituted carbamoyl,where n is 1 or 2.