There are two kinds of ultracentrifuges, the preparative and the analytical ultracentrifuge. The lysed sample is now ready for centrifugation in an ultracentrifuge. Both created an ultracentrifuge for isolating very fine viruses. Analytical ultracentrifugation is an analytical technique which combines an ultracentrifuge with optical monitoring systems. An analytical ultracentrifuge extends the ultracentrifuge by a light source and optical detectors. He invented the Ultracentrifuge, which was used in the discovery that proteins consist of macromolecules. Effects of ionic strength on the ultracentrifuge pattern for water-extractable soybean proteins at pH 7.6.