Discusses the advent of microscale experiments within undergraduate organic chemistry laboratories mainly resulting from environmental safety concerns involving waste disposal. Considers the cost savings in purchasing less reagents and chemicals, the typical glassware and apparatus, the reduced hazards from elimination of open flames, and other…

Describes Saskatchewan Indian Federated College's preprofessional, university-level science program and its focus on building math and science skills and on Indian culture, traditional medicine, current and future health care needs, and the goals of Indian people. Reports departmentwide enrollment increases. (DMM)

Discussed is a designer-drug technology called antisense which blocks messenger RNA's ability to carry information to protein producing sites in the cell. The applications of this drug to AIDS research, cancer therapy, and other diseases are discussed. (KR)

An activity in which students transform an ampicillin-sensitive strain of E. coli with a plasmid containing a gene for ampicillin resistance is described. The procedure for the preparation of competent cells and the transformation of competent E. coli is provided. (KR)

The potential of concept mapping, a learning strategy, coupled with assessments oriented toward problem solving used to facilitate meaningful learning, is examined. How students make and use concept maps in studying and the factors that influence the way they are made and used are discussed. Sample concept maps are included. (KR)

Investigations that facilitate experimental design, the concept of replication, data analysis, and other aspects of scientific study are described. A list of materials, the recommended plants, and the directions for building the hydroponics unit are included. (KR)

Examples from research that incorporate plants to illustrate biological principles are presented. Topics include dried pea shape, homeotic genes, gene transcription in plants that are touched or wounded, production of grasslands, seaweed defenses, migrating plants, camouflage, and family rivalry. (KR)

A way in which to shift the focus away from lecture and the professor during class time to student-centered discussion groups is presented. An exercise used in a course on chemical process analysis that uses the group discussion method is included. (KR)

Spreadsheets are well suited to many geochemical calculations, especially those that are highly repetitive. Some of the kinds of problems that can be conveniently solved with spreadsheets include elemental abundance calculations, equilibrium abundances in nuclear decay chains, and isochron calculations. (Author/PR)

Presented is a teaching progression that enhances learning through low-cost, manipulative transparencies. Discussed is instruction about restriction enzymes, plasmids, cutting plasmids, plasmid maps, recording data, and mapping restriction sites. Mapping wheels for student use is included. (CW)

Described are four musical instruments constructed from polyvinyl chloride (PVC) pipe. The use of computerized synthesizers to play scales and chords is discussed. Suggestions for other illustrations of acoustics are included. (CW)

Explained is the effect produced by an optics toy which uses two concave mirrors to produce an illusion. Formulas and calculations used in the explanation are detailed. (CW)

Reports the results of returned surveys of biology instructors (n=44), chemistry instructors (n=20), and personnel officers (n=19) in the North Carolina Community College System. The instructor survey concerned the type of courses taught, the academic preparation of the instructor, and the perceived value of secondary teaching. (PR)

Discusses the principles of sustainability and how it relates to human impact on the environment. Describes modern society as a paragon of waste in contrast to natural ecosystems. (PR)

Describes experiments by Thomas A. Knight on geotropism. These experiments took place about 200 years ago and used a centrifuge. (PR)