Revisiting the Liquid-Liquid Phase Behavior of -Alkanes and Ethanol.

Mixtures of alkanes and ethanol are important in many areas, for example, as fuel blends. This paper describes new experimental data obtained for the liquid-liquid equilibrium phase behavior of normal alkanes (-alkanes; CH; 9 ≤ ≤ 24) with ethanol. The results were obtained by applying the cloud point method in a temperature range of = 230-423 K at ambient pressure.

On the persistence of tumor initiation in two-stage carcinogenesis on mouse skin.

The persistence of the initiated state during two-step carcinogenesis in mouse epidermis is a generally accepted phenomenon, however, conflicting results exist with regard to the degree of irreversibility relative to the age of the animals. Several factors such as age-dependent alterations in the response of the epidermis to the promoter and skin damage following the initiation step have been proposed to account for the observed discrepancies. In the present investigation we have tried to circumvent skin-damaging effects of topically applied 7,12-dimethylbenz[a]anthracene by intragastric administration of the drug.