(1) The compensator thickness ratios must be measured in different radiation beams from different treatment machines and in different irradiation conditions because there are major difference between the CTR data obtained directly from experiments and the data besed on calculation from attenuation coefficient mu, physical density rho or electronic density, rho e. The specific CTR reported for aluminum and copper in the literature should only be used as a guideline.
(2) Besing on these papers and papers of some other authors, a short description of slow cortical potentials and cochlea potentials was done as they were discovered and introduced to clinical tests.
(3) We infer from bese data that decreased carbohydrate tolerance accompanying aging in some populations may be due to factors other than abnormalities in secretion of insulin and glucagon.