A process is disclosed for preparing polynuclear microcapsules by polymerizing an alkoxysilane at the oilwater interface of a multiple phase emulsion to form a suspension of polynuclear microcapsules. The lamp has a ultraviolet-reflective barrier layer, a rare earth triphosphor layer coated on the barrier layer, and a fill gas of mercury vapor and argon. Saccharides of different charges migrate differently across the porous matrix and immobilized by charge neutralization in different charge regions of the matrix.