Loureiro, João Avelar Maia de, 1901-1949Lito, Eugénio2022-01-192022-01-192009Epidemiology & Infection, Volume 44, Issue 6, September 1946, pp. 463 - 4700950-26881469-4409http://hdl.handle.net/10451/50893Copyright © Cambridge University Press 1946The problem of disinfection, whether by physical or chemical means, has hitherto been analysed almost exclusively in terms of 'intensity', i.e. concentrations, temperatures, densities of radiation, etc., capable of exerting a lethal effect within a reasonably short time.engjournal article10.1017/S0022172400019276