Microspheres. N,N'-Dissopropylcarbodiimide (0.2 g) was dissolved in dimethylformamide (10 mL). 10-Hydroxydecanoic Acid (0.4 g) was added to the solution. TG-beads (0.1 g) were swelled in dimethylformamide (10 mL) and then added to the solution. This solution was stirred for three hours at room temperature. It was spun down and cleaned with dimethylformamide (10 mL x 3) and then with ethanol (10 mL x 2). A white power was produced (0.95 g, 95%). A Kaiser test was conducted producing a yellow colour (successful).