The prevalence of bulimia nervosa in a Hungarian college and secondary school population.

A two-stage survey was conducted to determine the prevalence of bulimia and bulimic behavior in 2 Hungarian nonclinical samples. In the college sample 1.3% of females and 0.

Fitness components at the octanol dehydrogenase locus in Drosophila melanogaster.

Experiments were performed to study the fitness at the Odh locus in Drosophila melanogaster. Populations previously treated with alcohol (5% in the medium) were transferred to media containing more (10%) or no alcohol. Odh genotype frequencies of second instar larvae and mature adults were determined in each generation.

Changes in gene frequencies at the octanol dehydrogenase locus of Drosophila melanogaster imposed by environmental ethanol.

Experiments have been performed to study the effect of selection at the Odh locus in Drosophila melanogaster populations using different alcohol concentrations in the medium. The data can be best interpreted by assuming frequency-dependent selection. When genotype frequencies are considered as independent variables and values of Wrightian fitness as dependent variables, it turns out that different functions describe the selection of the coexisting genotypes.

Study of transport processes in soils and plants by microautoradiographic and radioabsorption methods.

The concentration profiles of lead and boron in carrot root and potato tuber were determined at various diffusion times by microradiographic method. The order of magnitude of the diffusion coefficient of lead ions and borate- or tetraborate ions was 10-13 m2s-1 and 10-11 m2s-1, respectively. The transport process of nutrients, leaf-manures and plant-protecting agents in plants was investigated by radioabsorption method.

Radiotracer study of the dissolution of amalgams.

The kinetics of dissolution of lead, thallium and zinc amalgams in contact with acid solutions containing dissolved oxygen were studied. The results were interpreted on the basis of the Wagner theory of the additivity of electrochemical part-processes. It was found that the rate of dissolution may be described by the differential equation for zero-order reactions.