Does somebody happen to know of a not too complicated method of labeling 
carboxymethylcellulose with a fluorescent marker? Would cellulose brighteners 
work? We want to look at ca. 3um vesicles with a hydrophilic core (probably 
going to be stained by Nile red) which are enveloped by 
carboxymethylcellulose. We would like to demonstrate that the vesicles are 
indeed enveloped by the carboxymethylcellulose and the spatial arrangement of 
the vesicles.