Presents a method of observing mitotic divisions in broad bean root tips, using aceto-orcein dye and hydrochloric acid. (CS)

Describes the use of personalized instruction in an introductory biology course for nonmajors at the University of Wisconsin-Superior. (CS)

Provides background information on the interdependency of agriculture and ecological and social systems. Discusses in detail: (1) fossil energy and food production; (2) energy-intensive agriculture and environmental pollution; and (3) methods for developing alternatives. Includes recommendations to conserve fossil energy used in current food…

Reviews the career and accomplishments of the physicist Paul Adrien Maurice Dirac, including a discussion of scientific concepts associated with Dirac. (JN)

Fifty subjects were physics graduate students in Taiwan, and forty-five were physics graduate students in the United States. Results indicated Taiwanese students pursuing their studies in the United States did not feel as well prepared as their counterparts. Recommendations include revision of undergraduate curriculum and requiring more English…

Potential-pH diagrams show the domains of redoxpotential and pH in which major species are most stable. Constructing such diagrams provides students with opportunities to decide what species must be considered, search literature for equilibrium constants and free energies of formation, and practice in using the Nernst equation. (Author/JN)

Addresses pedagogical problems of science in ethics and ethics in science with reference to beginning courses in chemistry and philosophical ethics, citing experiences in attempting to combine the two fields. (Author)

Described is an advanced undergraduate kinetics experiment using buffer dilutions to determine spontaneous rate, catalyzed rate, and reaction order. The reaction utilized is hydrolysis of p-nitro-phenyl acetate in presence of imidazole, which has been shown to enhance rate of the reaction. (Author/JN)

A nation-wide symposium on geology teaching was held in Spain, focusing on various aspects of geology curriculum and instruction at the secondary and college levels, including sessions on geology museums and the history/philosophy of geology. Indicates that a nationwide network of interested teachers was organized to update high school teachers.…

Compares and contrasts industrial and university physics departments, focusing on the group dynamics and work environment of a corporate physics (General Motors). A major difference between these departments lies in the motivation for and evaluation of research, not in the selection of research topics. (Author/JN)

Membrane cells were developed as alternatives to mercury and diaphragm cells for the electrolysis of brine. Compares the three types of cells, focusing on the advantages and disadvantages of membrane cells. (JN)

Suggests using National Institute for Occupational Safety and Health (NIOSH) criteria documents as a source for special topics material in chemistry. Presents a list of selected NIOSH documents, ordering information, and reviews one document on formaldehyde in some detail. (SK)

Briefly describes a module on the origin of life formulated for inclusion in introductory biology, geology, and astronomy courses. The authors are preparing a concise monograph on the topic to complement the three-week module. (Author/SK)

Suggests the use of diagrams illustrating the estimated temporal relations of preserved stratigraphic units in a region as a teaching tool to emphasize the paucity of stratographic information. (Author/DS)

Describes ways to modify teaching aids and laboratory materials for the visually handicapped student in an introductory college chemistry course. (CS)