The result of studies on improving Polish tobacco by the enzymatic treatment were presented. The polysaccharide-hydrolyzing enzymes hemicellulase, cellulase and commercial pectinolytic preparation Pektopol, were applied.
Scanning tunneling microscopy (STM) was used to study the structural changes of DNA induced by the antitumor drug cts-diamminedichloroplatinum. The STM image showed a dramatic structural perturbation of the DNA by complexed Pt with the characteristic bend of the double helix.