Methods for producing solid, substantially round, spherical and sintered particles from a slurry of a calcined, uncalcined or partially calcined raw material having an alumina content of greater than about 40 weight percent. A plurality of access requests may be received from a plurality of remote computer systems to a plurality of business entities stored by a content management server. A third aspect of the present invention is a method of assaying compounds to determine effects on cell growth. A secondary cooling system has an expansion tube in intimate and circuitous contact with the bottom and side wall of the pan. Handoff between radio frequency broadcast and webcast channels may be automated using information carried in broadcasts andor telecommunications signals or both. , flow of a photo-polymerizable resin is restricted from illuminated resin exclusion regions on a substrate surface by precisely situated flow barriers.