Describes experiments for the undergraduate organic chemistry laboratory which demonstrate reactions and syntheses that involve free - radical intermediates. (MLH)

Describes the use of pieces of equipment such as the Oxygen Temperature Probe (OTB) commonly used by fisherman, for research field trips. The instrument can be used in classroom experiments as well. Other equipment described includes the electronic thermometer and oxygen monitor. (EB)

Construction of a laboratory area suitable for laser experiments and the creation of holograms is described. (CP)

Provides an overview of the current methods of behavior modification, reviews some critical issues, such as fear of control, use of aversive control, and behavior modification in prisons, in an effort to aid in differentiating warranted from unwarranted concerns. Ethical standards and practices are discussed. (Author/AM)

Describes a series of activities for demonstrating the conditions necessary for burning (fuel, oxygen and temperature) plus several related phenomena. (CP)

Lists changes which have been made in second edition and explains the philosophy upon which the alterations were based. (CP)

Describes safety education curriculum units produced by the Science Teacher Education Project (STEP) in Great Britain. (MLH)

Students enrolled in an introductory, audio-tutorial biology course were randomly assigned to either the control group, which followed the regular program and took pre and posttests designed for this study, or to the experimental group, which followed an identical program with additional exercises specially designed to teach higher cognitive…

Describes a laboratory experiment on geometrical optics designed for life science majors in a noncalculus introductory physics course. The thin lens equation is used by the students to calculate the focal length of the lens necessary to correct a myopic condition in an optical bench simulation of a human eye. (Author/MLH)

Discusses the principle of operation of phase-sensitive amplifiers. Gives three examples, suitable for undergraduate laboratory use, of the use of phase-sensitive, or "lock-in" amplifiers. Concludes with a description of an inexpensive lock-in amplifier which has an overall voltage gain of 1000. (Author/MLH)