When NCTC clone 929 (strain L) cells were grown either continuously or at intervals in toxic human serum, they became resistant to the toxic substance or substances. The resistance developed to toxic human serum was passed from one cell generation to another; i.e., it was heritable. The resistance to toxic human serum, developed in strain L cells, was associated with a decrease in their ability...

An impedimetric sensor for persistent toxic substances, including organic pollutants and toxic inorganic ions is presented. The persistent toxic substances are detected using an ultrasensitive technique that is based on electron-transfer blockage. This depends on the formation of guest-host complexes, hydrogen bonding, or a cyclodextrin (CD)-metal complex (Mm(OH)n-β-CD) structure between the ta...