The reduction of stresses will permit the habitat and biota to recover many of their more desirable characteristics. (DF)

Proposes a hypothesis suggesting that parts of the central nervous system that contain norepinephrine and dopamine are dynamically interrelated under stressful conditions in a compensatory way. (MLH)

Makes a case for stressing the beneficial aspects of gene propagation, and answers many questions about the potential hazards of this research. (MLH)

Rod-isolation techniques show that light-adapted human rods detect flicker frequencies as high as 28 hertz, and that the function relating rod critical flicker frequency to stimulus intensity contains two distinct branches. (MLH)

Examines historically the attitudes of United States and British geneticists on the topic of race crossing. Between 1930 and 1950 the attitudes changed from a condemnation of wide race crosses because of deleterious effects to a belief that such inter-racial crosses were at worst biologically harmless. (JR)

Reports the detection of magnetic fields associated with the flow of electric current in the human brain in response to electrical stimulation of the fingers. (SL)

Describes the continuing efforts of environmentalists to eliminate the use of chlorinated hydrocarbons as pesticides, and in particular discusses the opposing positions taken by the Environmental Defense Fund and the Shell Chemical Company on the use of aldrin and dieldrin. (JR)

Discusses some of the bioethical and legal questions related to in vitro fertilization of human eggs as a means of alleviating the suffering of infertile couples. (JR)

Discusses the problem of whether an explanation of the phenomena of life can be deduced from an exclusive reliance on causal relationship. Indicates that this exclusive reliance is not valid and adds the concept of anticipation. (GS)

Discusses the optimality of natural selection, ways of testing for optimum solutions to problems of time - or energy-allocation in nature, optimum patterns in spatial distribution and diet breadth, and how best to travel over a feeding area so that food intake is maximized. (JR)

Argues that overexploitation of renewable biological resources to the point of extinction is possible under private (commercial) management. Public surveillance is necessary to prevent severe depletion of resources. An economic theory of a biological resource is developed, using the blue whale population as an example. (JR)

New and improved analytical methodology has made it possible to study and monitor trace concentrations of many toxic elements. Surveys some of these analytical advances and their practical applications to biological problems. (JR)

A case is made for directly relating biomedical research to national health service revenues. We are headed for "stultification and possible disaster" if we do not. (Author/RH)

Describes a currently used picosecond spectroscopy system capable of reliably recording picosecond events. Two areas of picosecond research are discussed: one concerns the interaction of electrons in fluids; the second, the primary events in vision. (Author/HM)

Discusses research in the use of hormones and viruses to control insect populations. Although entomologists do not think that pheromones, hormones, and viruses will completely replace more conventional chemical insecticides, they will become increasingly important and will reduce our dependence on traditional insecticides. (JR)