Presents three dimensional models of biological pathways for the following cycles: carbon, nitrogen, sulfur, and a combination of the three. Discusses steps involved in each cycle and breaks each cycle into trophic and environmental regions. (MVL)

Describes a chemistry software program that emulates a modern binary gradient HPLC system with reversed phase column behavior. Allows for solvent selection, adjustment of gradient program, column selection, detectory selection, handling of computer sample data, and sample preparation. (MVL)

Lists five module objectives and discusses the overall need for the modules. Indicates each module is preceded by a statement of the problem and objectives are aimed specifically at the anticipation and reduction of potential hazards. Offers examples of modules on fume hoods and on disposal of waste. (MVL)

Discusses ways to generate and present images to students to study chemicals and chemical reactions. Contrasts current technologies with traditional means of displaying images. Summarizes experiences with the use of interactive videodisk-based lessons for chemistry instruction. (MVL)

Discusses a visual database of information about chemical elements. Uses a single sided 12-inch, 30-minute, CAV-type videodisk. Contains a picture of almost every element in its stable form at room temperature and normal atmospheric pressure. Can be used with the video controller from "KC? Discoverer." (MVL)

Discusses the history and commercialization of alkanes. Examines the nomenclature and uses of alkanes. Studies polymerization and several types of polyethylenes: low-density, high-density, low-molecular-weight, cross-linked, linear low-density, and ultrahigh-molecular-weight. Includes a glossary of hydrocarbon terms. (MVL)

Presented is a conceptualization of a science-teaching practicum and exploration of supervision dialogue between a student teacher of grade nine science and his supervising teacher. The Schon "hall of mirrors" model of supervision is utilized. The model focuses on "parallelisms" that are created at times between the practice of…

Reported are the results of a 1987 survey of U.S. chemical engineering departments on health and safety. Some details of what is being done at the University of Alabama are provided. A syllabus and reading resources for a survey course on safety, health, environmental, and ethical issues are included. (MVL)

Described are the essential elements of memos; suggested are a basic format for organization, and two problems to which technical specialists' memos seem particularly susceptible. Included is a memo assignment used in senior design classes and professional development seminars. (MVL)

The main advantage of using these concepts lies in the reduction of algebraic work involved in solving certain dynamics problems. A brief analytical treatment of the acceleration center and a description of a virtual work principle for equipollent systems in the kinetics of rigid bodies are provided. (MVL)

Provided is a unit which relates the fulcrum of a lever system and the mean of a distribution of scores. The objective, rationale, two student laboratories, and an evaluation system are outlined. Content background on statistics is offered. (MVL)

Reviews three software packages: 1) a package containing 68 programs covering general topics in chemistry; 2) a package dealing with acid-base titration curves and allows for variables to be changed; 3) a chemistry tutorial and drill package. (MVL)

Stresses the need for chemical engineering education to keep abreast of current needs. Explores the need for global economics, marketing strategy, product differentiation, and patent law in the curriculum. Questions the abilities of current chemical engineering graduate students in those areas. (MVL)

Describes a program for students or science teachers to integrate demonstrations into the science curriculum. Uses the idea of a chemical genie with numerous demonstrations to illustrate that science can be fun, to learn some indicators of a chemical reaction, and to discover factors that affect reaction rates. (MVL)

Presents reviews by classroom teachers of software for teaching science. Includes material on the work of geologists, genetics, earth science, classification of living things, astronomy, endangered species, skeleton, drugs, and heartbeat. Provides information on availability and equipment needed. (RT)