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Suicide: a 15-year review of the sociological literature. Part I: cultural and economic factors.

Cultural and economic patterns from 130 sociological works on suicide from 1981 to 1995 are reviewed in this article. The traditional Durkheimian perspective on suicide was often questioned by research on the impact of the mass media, alcohol, class, modernization, religion, and politics. Major theoretical developments included the application of differential identification theory to Phillips's model of copycat suicide, the application of criminology's opportunity theory to suicide, and new explanations for the link between alcohol and the social suicide rate. Explanations are reviewed for the major new suicide trend: after half a century of convergence, male and female suicide rates are diverging. Finally, the review notes patterns of continued stability in suicide research findings in areas such as racial differences and economic strain.

Cultural Characteristics↗

Model selection and parameterization of the concentration-response functions for population-level effects.

As concentration response functions for chronic population-level effects of pollutant chemicals, three mathematical models were presented and examined for goodness of fit to published toxicological data that estimated the population-level effects of chemicals in terms of the intrinsic rate of population growth (r). Among the examined concentration-r functions, the power function model, that is, r(x) = r(0)[1 - (x/alpha)beta], in which x is the exposure concentration and alpha and beta are parameters, performed with the best fit to each data set. The power function model is characterized by two parameters representing the absolute value of toxicity, alpha, and the curvature of responses, beta. The bootstrap simulation, conducted on the entire data set consisting of all published data that we collected, indicated that the observed variance of beta among actual data sets could be mostly explained by the random error variation generated from the bootstrap resamplings. The generic beta value, determined from the entire data set and expected to denote the best estimate of beta if the variability of beta was completely due to random sampling error, was estimated as 1.84. It was implied that the response of the intrinsic rate of natural increase (r) to chemical exposure was nearly quadratic in many cases.

Animals↗

[Gene pool of the population of Ukraine: Current state and new approaches to maintenance and conservation].

Defense and conservation of the Ukraine Population genofond are the most topical problem of nowadays. Stating of the criteria of population genofond status valuation, revealing all the damaging factors and applying of scientific methods of modern genetics are necessary for the development of theoretical and methodological bases of this problem. The authors try to analyze in detail negative factors causing damage in genofond of the Ukraine population, to forecast the dynamics of further development of ecological-genetic situation in the Ukraine, to analyze new approaches to the problem of genofond defense and conservation, as well as estimation of possible consequences caused by changes in population genofond.

Ecology↗