title: Experimental determination of sedimentation and diffusion coefficients employing concentration changes as a function of time.
mesh_terms: D002919:Chymotrypsinogen; D003201:Computers; D004058:Diffusion; D005069:Evaluation Studies as Topic; D008433:Mathematics; D008970:Molecular Weight; D012260:Ribonucleases; D013997:Time Factors; D014461:Ultracentrifugation
chemical_list: D002919:Chymotrypsinogen; D012260:Ribonucleases