Nachweis der Ausbildung übermolekularer Teilchen in Lösungen vonDNAdurch Messung der Lichtstreuung und Viskosität

摘要

Buffered solutions of various preparations of calves thymus and salmon sperm resp. were investigated by optical and rheological methods. The fine structure of measuredP(θ)-light scattering functions was interpreted as being caused by large supermolecular particles in solution. These could be analysed by use of theRayleigh-Gans-theory and were found to have low density and to be very sensitive against temperature and shear. Number and size of supermolecular particles inDNA-solutions increase steadily when the solutions are allowed to rest for some days