Presents a method of constructing short range transmitters suitable for sensing the temperature in eggs, nest cavities or other applications. Provides a list of materials, circuit diagram, and assembly instructions. (CW)

Describes the use of a microwave oven in the biology laboratory as a safe, time-saving device. Discusses media preparation, dehydration of media and specimens, and reagent testing. (CW)

Discusses three aspects of electrochemical detectors: (1) signal and noise generation and signal-to-noise ratio, (2) improvement of qualitative information content, and (3) control of selectivity of the detector. Explains electronic principles of detectors and detection limits. Lists current applications and research. (ML)

Describes a new high school chemistry curriculum designed around societal issues by the American Chemical Society. Uses more organic and nuclear chemistry but less physical chemistry than regular courses. Stresses problem solving and citizen education in chemistry. Examines current implementation and support materials. Suggests liberal arts course…

Reported are the differences in the understanding of concepts involved in photosynthesis and its role in ecology between students who had studied advanced biology and those who had not. Reports that the less experienced students had a poorer understanding of autotrophic respiration and energy aspects of photosynthesis. (CW)

Presents an experiment to demonstrate the degree to which environmental cations are taken up by susceptible lichen organisms in the field. Discusses the preparation of materials, procedures and typical results for this short laboratory exercise. (CW)

Describes a procedure for the growth of tobacco plants in flasks. Demonstrates plant tissue culture manipulation, totipotency, and plant regeneration in approximately 12 weeks. Discusses methods, materials, and expected results. (CW)

Examined the effects of an instructional method used to remedy students' difficulties caused by fragmented and incorrectly interpreted knowledge. Described the method using explicit concept-interpretation procedures. Finds that the method helped to revise students' deficient prior knowledge about acceleration, and helped them to interpret it…

Shows the difficulties of understanding the hypothesis a posteriori. Describes a scientific method containing phenomenologic, hypothetic, and theoretic phases. Provides the results of an experiment on simple pendulum oscillation by using this method. (YP)

Suggests that the overall educational experience of science aspirants has an indirect and latent role in preparing future types of researchers. Discusses arguments concerning the relationship between cognitive inclinations and educational experience, and how problem-solver and problem-identifier type students respond to educational dilemmas. (YP)

Investigated was the intellectual behavior of 66 student teachers of science. Suggests that the degree of integration of teaching practice with theoretical studies may be a more important factor than length of teaching practice. (YP)

Presented is a review of environmental ethics since the Belgrade Charter of 1976. Outlines seven ethical positions to be considered. Discusses ethics in environmental education practice. Focuses on four ways to lessen the dilemma of the presentation of values in environmental education. (CW)

Evaluates 16 commercially available courseware packages covering topics for introductory physics. Discusses the price, sub-topics, program type, interaction, time, calculus required, graphics, and comments of each program. Recommends two packages in measurement and vectors, and one-dimensional motion respectively. (YP)

Describes environmental education programs in the Lagos area. Reports survey results related to teachers' environmental action skills. Suggests some recommendations for environmental protection in the Lagos area and all states in Nigeria. (YP)

Introduces different methodological strategies in analyzing potential energy surfaces (PES) used in chemical reactivity studies. Discusses the theory of PES and gives examples to be used for student work. Provides procedures for calculating normal coordinates and vibrational properties of an activated complex. (ML)