A new, fast and effective colorimetric analysis of the artificial sweetener aspartame is presented for application in undergraduate laboratory courses. This new method incorporates the use of a modified biuret reagent for selective detection and analysis of aspartame in aqueous solutions. The modified reagent is less caustic than the traditional…

A series of activities involving comparing weights of objects directly, using non-standard units, using standard units, using simple scales, and using complex scales are described. (SD)

How the criticism of a teacher led to the improvement of his experimental psychology course and a symposium on teaching experimental psychology. (Author/DE)

Indicates that specific laboratory standards for handling chemical carcinogens should become law in the near future. Small colleges and universities may have financial trouble in complying with laboratory safety standards investigated by the Occupational Safety and Health Administration. (GS)

Discusses the operation of the Health and Safety at Work etc. Act 1974 in relation to British universities. (MLH)

Discusses types of laboratory waste materials and methods for their safe disposal. (MLH)

Describes the hazards of using living materials in the science laboratory and outlines safety procedures that are particularly applicable to schools. Explains hazards to both mental and physical health and examines the latter in terms of fundamental and contingent factors. (Author/GS)

Describes the general features of three schemes used by teachers to assess their students' manipulative, observational, interpretational, and planning abilities and their attitude toward laboratory work. The three schemes were open-ended, intermediate, and check-list modes. A comparison of grades derived from these modes is presented. (GS)

A mathematics laboratory with commercial and teacher-made materials, a workshop, and a discussion room were established. An extension course taught how to use the instructional aids and accompanying behavioral objectives and activity cards. Active use of the lab is increasing. The teachers' enthusiasm has spread to the students. (KM)

Criticizes studies of egocentric development in children using cutaneous perception procedures. Also questions study contribution to the understanding of the development of decentering. (Author/SDH)

This unit on aerobic sludge digestion covers the theory of the process, system components, factors that affect the process performance, standard operational concerns, indicators of steady-state operations, and operational problems. The instructor's guide includes: (1) an overview of the unit; (2) lesson plan; (3) lecture outline (keyed to a set of…

This manual contains the textual material for a single-lesson unit on aerobic sludge digestion. Topic areas addressed include: (1) theory of aerobic digestion; (2) system components; (3) performance factors; (4) indicators of stable operation; and (5) operational problems and their solutions. A list of objectives, glossary of key terms, and…