Describes an experiment in which plasmid DNA is digested with restriction enzymes that cleave the plasmid either once or twice. The DNA is stained, loaded on a gel, electrophoresed, and viewed under normal laboratory conditions during electrophoresis. (DDR)

Describes the study of dung-inhabiting or coprophilous fungi to illustrate basic lab techniques and fundamental ecological concepts. Contains 24 references. (WRM)

Presents methods that can be used to isolate the enzyme tyrosinase and to assay its activity. Lists instructions for a laboratory activity that has variable but frequently dramatic results. (WRM)

The present research describes an efficient procedure to obtain high levels of trypsinogen and chymotrypsinogen by using a simple, rapid, and easily reproducible method. The extraction process and the time-course of activation of zymogens can be carried out in a single laboratory period, without sophisticated equipment. The main objective was to…

This study investigates how high school students respond to an environment of authentic science inquiry while participating in an intensive summer institute, the Waksman Student Scholars Programme at Rutgers University. We examined how students apprenticed with expert scientists in a study of contemporary questions in molecular genetics. Students…

A new, fast and effective colorimetric analysis of the artificial sweetener aspartame is presented for application in undergraduate laboratory courses. This new method incorporates the use of a modified biuret reagent for selective detection and analysis of aspartame in aqueous solutions. The modified reagent is less caustic than the traditional…

Describes a training program for teaching assistants who presented laboratory instruction in a biology course and attended weekly seminars, in addition to being observed and video-taped while teaching. (LS)

Describes an exercise that teaches Mendelian inheritance using human traits which students find exciting and relevant. (LS)

An experimental psychology course which analyzes the broad probability of operant conditioning is described. (DE)

A course in teaching research methods in an experimental child psychology course is described. (DE)

Describes a method in which the effect of impurity ions in the dielectric is taken into account in the operation of the Kerr cell. (Author/CP)

Describes a course designed to contribute directly to the teacher's ability to teach chemistry at the high school level with particular emphasis on planning and running a laboratory. Outlines the topics and occurrences in the course week by week. (GS)

By using a computer to simulate experimental situations, engineering laboratory courses can provide more ambitious experiments as well as experiments demanding more calculations. (SD)