Describes a new laboratory technique for working with small samples of compounds used in nuclear magnetic resonance (NMR) analysis. Demonstrates how microcells can be constructed for each experiment and samples can be recycled. (TW)

Describes a quantitative experiment designed to demonstrate buffer action and the measurement of buffer capacity. Discusses how to make acetate buffers, determine their buffer capacity, plot the capacity/pH curve, and interpret the data obtained. (TW)

Describes some of the characteristics of "herps" (amphibians and reptiles). Contains teaching activities dealing with ancient herps, learning stations that encourage sensory experiences with herps, and games, puzzles, and a dramatic play about herps. Includes reproducible handouts designed to be used with the activities, as well as a quiz. (TW)

Describes a variety of nature activities for children that can be done in winter. Includes ice art activities, a snow race, making ice cream, animal tracking techniques, and bird role-playing. (TW)

Describes several learning activities that can be done with children in the snow. Includes shake paintings, snow sculpture, snow "snakes," snow-ball contests, an igloo experience, and how to make snowshoes. (TW)

Discusses the use of analogies and models for teaching about electric current. Reports on a study in which one group of students used analogies to learn about electric current and one did not. Results indicate that, in this case, analogies did not play a significant role in student understanding. (TW)

Provides background information, lesson plans, bulletin board activities, and a learning center description, all dealing with dinosaurs. Includes clip art for the learning center and reproducible "stamps" about some endangered species. (TW)

Suggests a laboratory introduction to solid-solid phase transitions, thermochromism, and color changes associated with changes in ligand coordination suitable for undergraduate students in physical and general chemistry. Describes the preparation and analysis of the experiment. (CW)

Describes an apparatus that can be used to measure low gas pressures over a range of temperature in the undergraduate teaching laboratory. Discusses an experimental procedure and theory for pressure temperature measurements with this apparatus. (CW)

Discusses some contributions chemists can make in the investigation of crime. Describes the optical properties of materials and defines the refractive index. Explains the refractive indices for liquids and for solids, and provides laboratory exercises for determining both. (TW)

Discusses the use of specific reactions of metabolic pathways to make measurements in the laboratory. Describes an adaptation of an experiment used in undergraduate biochemistry laboratories involving the induction of an enzyme in E. coli, as well as its partial purification and characterization. (TW)

Provides background information and student activities on how desert animals have adapted to dryness and heat, how and when animals move on the desert, and nocturnal/diurnal animals. Each activity includes objective(s), recommended age level(s), subject area(s), list of materials needed, and procedures. Ready-to-copy pages are included for a…

Reviews the benefits and hazards that the sun provides. Describes activities which focus on the power of the sun and on the development of "Sun-sensible" behavior. Also included is a poster which contains puzzles and additional information and activities on safe sunning. (ML)

Explains the principles of the Doppler ultrasound technique and reviews its potential applications to the teaching of cardiovascular physiology. Identifies the instrumentation needed for this technique; provides examples and illustrations of the waveforms from the ultrasound blood velocimeter. (ML)

Describes three demonstrations/activities that involve forces: (1) a canoe-like boat made from copper window screen; (2) magnetic forces with a paper clip and ceramic magnetic; and (3) an "icemobile" machine that cuts ice cubes without an obvious source of energy. (DH)