Discusses the significance of periodicity and covalent atomic radius among the elements. Describes contraction across the row, expansion down the group, irregularities in the buildup of the periodic table and periodicities of physiochemical properties. (CW)

Describes three types of chemical content, learning strategies for each type, and methods of teaching students to use the appropriate strategies. Provides suggestions for improving students' ability to learn. (CW)

Reviews the recent history of the National Science Foundation's funding of engineering research and the Engineering Research Center program. Discusses the selection, review and evaluation of centers. Criticizes the systems approach to engineering. Highlights the importance of engineering practice and the opportunities for research. (CW)

Describes two complementary laboratory exercises that use the glass fiber assay to assess receptor specificity and hormone binding affinity in rat liver cytoplasmic extracts. Details the methods, materials and protocol of the experiments. Discusses the basic concepts illustrated and the feasibility of using the experiments at the undergraduate…

Describes an experiment to discover the topology of plasma membrane aminophospholipids (phosphatidylethanolamine and phosphatidylserine) using whole platelets and trinitrobenzene sulfonate (TNBS) as a probe. Reports changes in phospholipid distribution during platelet activation with simultaneous action of thrombia and collagen. Details the…

Proposes a mathematical computer model for the behavior of liquids using the classical dynamic principles of Sir Isaac Newton and the molecular dynamics method invented by other scientists. Concludes that other applications will be successful using supercomputers to go beyond simple Newtonian physics. (CW)

Describes how active participation in research projects helps to recruit and retain students in scientific careers. Identifies the teaching methods used in an undergraduate research group in a National Science Foundation Research Experience for Undergraduates. Focuses on the educational benefits received by the undergraduate. (CW)

Describes how, using an overhead projector (OHP) and a transparent roll of acetate film, it is possible to demonstrate: (1) travelling waves; (2) standing waves; and (3) phase and group velocity applied to waves. The set-ups provide a way to demonstrate features which are normally difficult to visualize and understand. (JN)

Modeled after the program "Mastermind," this program teaches students the art of protein sequencing. The program (written in Turbo Pascal for the IBM PC, requiring 128K, a graphics adapter, and an 8070 mathematics coprocessor) generates a polypeptide whose sequence and length can be user-defined (for practice) or computer-generated (for…

Presents two simple techniques for physics demonstrations: (1) a projection lens system for oscilloscopes which uses an inexpensive surplus lens and enables the entire class to observe the screen; and (2) a polarized optical "Cheshire cat" which uses the overhead projector and Polaroid sheets. (JN)

Describes: (l) a microcomputer-based system for filing test questions and assembling examinations; (2) microcomputer use in practical and simulated experiments of gamma rays scattering by outer shell electrons; (3) an interactive, screen-oriented, general linear regression program; and (4) graphics drill and game programs for benzene synthesis.…

The status of women in analytical chemistry, based on the results of a survey of female analytical chemists, is discussed. Age, current employer, principal job activity, opportunities for advancement, attitudes of others, salaries, and issues related to working mothers are among the areas addressed. (JN)

Describes the three processes of folding in rocks: buckling, bending, and passive folding. Discusses how geometrical properties and strain distributions help to identify which processes produce natural folds, and also provides information about the mechanical properties of rocks, and the sense of shear in shear zones. (TW)

Provides an historical overview of the origins, developments, and contributions of chemical engineering. Reviews the roles of the university and industry in the education of chemical engineers. Includes a listing of the major advances of chemical engineering since World War II. (ML)

Advocates that reflection and discussion about the limits of science should be a component of science instruction. Cites examples of the limitations of science and includes suggestions for teaching science while recognizing its boundaries. (ML)