An experiment on the heat conductivity of different materials are described. Applications for energy education in the elementary classroom are implied. (MDR)

Presents an apparatus for demonstrating two-dimensional random motion suitable for illustrating molecular phenomena. Three specific uses are presented. (SL)

Describes an experiment for estimating the half-life of thorium-232. (SL)

Sticks, string and observation start children off on the bare bones of human biology. (Editor)

Students are challenged to investigate a simple electric motor and to build their own model from a battery, wood block, clips, enameled copper wire, bare wire, and sandpaper. Through trial and error, several discoveries are made, including a substitute commutator and use of a radio to detect motor armature contact changes. (DH)

Presents activities and experiments that can be performed with mirrors to illustrate the nature and behavior of light. Includes diagrams, directives and investigative questions. (ML)

Describes a science activity designed for undergraduate biochemistry classes. Provides background, a list of materials, experimental procedures, and the results of this experiment. (CW)

Presents a practical exercise that enables students to measure flux control coefficients in a metabolic pathway in vitro, to verify the summation property, and to compare the differences in the distribution of these coefficients in different steady states. Discusses background, materials, methods, and results of the activity. (CW)

Describes the construction of an inexpensive apparatus for separating proteins by polyacrylamide gel electrolysis in the presence of sodium dodecyl sulphate. (TW)

Suggests a new experiment to study the genetic material of eukaryotes. It is based on the rapid growth and interest of the research on chromatin. (TW)

Discusses the use of the FT-IR spectrometer in analyses that were previously avoided. Examines some of the applications of this spectroscopy with aqueous solutions, circular internal reflection, samples with low transmission, diffuse reflectance, infrared emission, and the infrared microscope. (TW)

Describes an experiment to identify lactose and estimate the concentration of lactose in a sample of milk. Gives a background of the investigation. Details the experimental method, results and calculations. Discusses the implications of the experiment to students. Suggests further experiments using the same technique used in…

Contains a reading list of articles published in 1985 covering 14 biological topics. Includes descriptions, procedures, and references for 26 experiments. These investigations deal with selected concepts in biology, ecology, chemistry, and physics and include computer-based instruction. (ML)

Appraises current explanations of how visual processing occurs. Highlights the basics of simultaneous and serial levels of processing. Discusses the results of a series of experiments on visual-search tasks and also on the role of prior knowledge in processing. (ML)

Describes experiments which focus on the perception of three dimensions. Discusses the cues about distance and depth and the role they have in perceptions of three dimensions. Evaluates the effect of color on the illusion on depth. (ML)