Recommendations are given for obtaining high quality preparations of chromosomes with relatively little equipment using an improved Feulgen-squash technique. (Authors/SA)

Presents a method for microscopically examining cytoplasmic streaming in root cells, and physiologically examining the delivery of ions to the xylem exudate. The expected result does not occur and the authors believe that students learn to re-examine the assumptions, thereby increasing their skills in scientific inquiry. (Authors/SA)

This paper, presented at the conference on the role of the laboratory in physics education which was held in Oxford, England in July 1978, describes the role of the laboratory in school and university physics in Eastern Europe. (HM)

Describes a short course for parents and children in grades 5-8. Fundamental concepts of chemistry are the focus of the experiments described. (SA)

Discusses how laboratory activities can match science teaching goals. Analysis of two commonly used laboratory investigations in high school physics and biology are presented using a list of 24 skills and behaviors which are related to the processes of scientific inquiry and problem solving. (HM)

Describes a simulation done by students in a Year 4 undergraduate physics laboratory course on pulse technology. The course objective was to provide students with experience in computation pulsed electrical circuits and in comparing the computation with experiments. Results showed that the microcomputer simulated experiments made for a more…

Errors found in a common physics experiment to measure acceleration resulting from gravity using a linear air track are investigated. Glider position at release and initial velocity are shown to be sources of systematic error. (CW)

Presented are four experiments for use in two wet analysis courses. These include comparisons and enzyme analysis. In each case, the theory behind each experiment is discussed. (CW)

Presents four articles dealing with chaotic systems. Lists sources for nine demonstrations or experiments dealing with self-organization. Provides a vocabulary review of self-organization. Describes three chemical oscillator models. Discusses the role of chaos in flow systems. (MVL)

Discusses a student exercise which requires the optimizing of the charring and atomization temperatures by producing a plot of absorbance versus temperature for each temperature parameter. Notes that although the graphite furnace atomic absorption spectroscopy technique has widespread industrial use, there are no published, structured experiments…

Presents an examination of the buoyancy principle which can serve as a simple but rigorous illustration of a falsification test that not only clears up a possible misconception but also points the way to a number of practical uses of buoyancy measurements that have not generally been recognized. (MVL)

Discussed are selected application and future trends in supercritical fluid chromatography (SFC). The greatest application for SFC involves those analytes that are difficult to separate using GC or LC methods. Optimum conditions for SFC are examined. Provided are several example chromatograms. (MVL)

Discusses the mechanism and the change of pH during the reaction. Notes that a dramatic rise in pH occurs when the reaction nears completion. Evaluates theories by other authors. (MVL)

Gives upper level chemistry students a better understanding of the application of lasers in the field of spectroscopy. Provides three experiments to demonstrate the thermal lens effect: determination of beam profile, cell position optimization, and pKa determination. (MVL)

Explains the development of a science program which was initiated to help students, parents, and other teachers appreciate science. Provides a list of materials needed, procedures, questions, and objectives for performing two of the 30 activities used in the project. (RT)