Ionization growth measurements have been carried out in carbon monoxide for values of E/N (electric field/gas number density) between 109 and 182*10-17 V cm2 and N values between 3.3 and 235*1017 cm-3. No attachment was detected and the ionization coefficients obtained agree with the 'apparent' ionization coefficients of Bhalla and Craggs (1961) but also show an increase with number density. The secondary ionization coefficients obtained differ from the results of Bhalla and Craggs but the breakdown measurements are in good agreement. Thomson's backscatter equation is shown to fit the current-voltage variation.
Increasing concentrations of chlorhexidine, streptomycin, neomycin, gentamicin and kanamycin reduced the mobility of, and negative charge on, Escherichia coli cells. This finding has formed the basis of a novel method for assaying these antibacterial agents.
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