Signal-Detection theory was applied to analysis of automatic data. In one experiment, anxiety surrounding auditory signals was induced; in the other, signals were administered to a psychometrically anxious group. Subjects in both experiments had enhanced automatic activity. (Author/CS)

A review of experiments which demonstrate the release of ATP from skeletal muscle, cardiac muscle, and active brain tissue. Effects of exogenously applied ATP to brain tissue are discussed in relation to whole body exercise. (Author/SA)

Describes how a handful of institutions are experimenting with computer simulations to offer hard science labs through distance education. (EV)

Presents science activities conducted with liquid nitrogen to demonstrate electricity, magnetism, and kinetic theory. (YDS)

Describes a science laboratory on reproductive behavior and studies the dynamics in Lirceus, an aquatic crustacean of which the females evaluate the males' quality through mating contests. Explains collecting isopods and developing colonies in the lab environment. Investigates food deprivation, locomotor activity, and behavioral trials to…

Bioluminescence transformation experiments show students the excitement and power of recombinant DNA technology. This laboratory experiment utilizes two plasmids of "Vibrio fischeri" in a transformation experiment. (LZ)

Discusses the effects of expectancy on learning in a life science instructional laboratory exercise. Contends that prior knowledge directs the act of observing. Investigates the role of prior conceptions on secondary school students' ability to observe scientific phenomena. (Contains 30 references.) (YDS)

Describes an experiment in which the incubation time to observe denitrification and other processes of the nitrogen cycle is reduced from 7-14 days to 24-48 hours. Presents calculations of processes in the nitrogen cycle in the form of a dichotomous key. (SAH)

Describes an alternative to teaching ecology by using bacteria to test competitor survival. Students observe a time-dependent selective killing of other unrelated bacteria by Pseudomonas aeruginosa. (SAH)

Presents a microbiology experiment on how to make soft pretzels with different flours and analyze the results using regression models. (Contains 12 references.) (ASK)

Introduces a chemical model illustrating the aspects of the second law of thermodynamics which explains concepts such as reversibility, path dependence, and extrapolation in terms of electrochemistry and calorimetry. Presents a thought experiment using an ideal galvanic electrochemical cell. (YDS)

Describes a simple laboratory activity illustrating the chemiosmotic principles of active transport in yeast cells. Demonstrates the energy coupling mechanism of active a-glucoside uptake by Saccaromyces cerevisiae cells with a colorimetric transport assay using very simple equipment. (Contains 22 references.) (Author/YDS)

Describes an experiment on the use of problem-based learning. (Author/YDS)

Explains a physics experiment on the dynamics of impact cratering. Measures the spreading velocity of the impact wave and the acoustic signal. (YDS)

Describes a laboratory experiment on surface tension. (Contains 14 references.) (YDS)