Describes a procedure for determining ethane-1,2-diamine (EN) which is generally applicable for inert or labile complexes or for EN in its salts, although it cannot be used directly with ammonium or coordinated ammonia. It gives results with five percent accuracy or better and requires less than one hour laboratory time. (JN)

The research base in the study of teaching is broader than it has ever been. The most obvious use of this research is in teacher education programs. Pedagogy must become a laboratory-based field of study, with environments in which to experiment with producing cognitive and affective change in children. (MT)

Provides the National Science Teachers Association guidelines to enrich education by encouraging students to observe living organisms and to learn proper respect for life. Major areas include: care and responsibility for animals in the classroom; experimental studies of animals in the classroom; and research investigations involving vertebrate…

Hardware and software requirements for setting up a microcomputer-based laboratory for an undergraduate psychology course in research methodology are discussed. (Author/RM)

Presents a scenario related to the disposal of potentially dangerous ether. Several suggestions for dealing with peroxide-forming compounds are included. (JN)

Presents an outline of group separations for a nonhydrogen sulfide analytical scheme applicable to all metallic elements (Bromide scheme). Also presents another outline of an abbreviated and modified version (Iodide scheme) designed for emphasis on nutritionally important metals, with special attention to 10 cations. (JM)

Describes an undergraduate laboratory experiment used to illustrate the use of gas chromatography retention indices for the identification of unknown compounds, specifically for the identification of unknown compounds and for the identification of the volatile compounds responsible for the odor of the banana. Procedures, reference data, and sample…

Provides procedures for synthesizing and purifying a vitamin K metabolite (2,3-epoxide) to introduce many of the techniques used in lipid biochemistry. Includes typical results obtained as well as an optional experiment designed to test the purity of the epoxide obtained. (JM)

This article discusses how a school in Minnesota centralized its computer program into a lab situation taught by a teacher-computer specialist. Entire classes were instructed in word processing, programing with Logo, and modified drill and practice. Teachers were also involved in workshops to further computer literacy. (DF)

Discusses the properties of surface-conducting glass and the chemical nature of surface-conducting stannic (tin) oxide. Also provides the procedures necessary for the preparation of surface-conducting stannic oxide films on glass substrates. The experiment is suitable for the advanced inorganic chemistry laboratory. (JN)

Presents and discusses results (based on data from 1,082 microcomputer-using schools) which suggest that where schools locate their microcomputers has an impact on how they are used. Locations examined include classrooms, laboratories, libraries, special rooms, and mixed locations. (JN)

Outlines steps to generate cell samples for observation and experimentation. The procedures (which use ordinary laboratory equipment) will establish a short-term primary culture of normal mammalian cells. Information on culture vessels and cell division and a list of questions to generate student interest and involvement in the topics are…

Describes two frequently used DNA sequencing methods: Sander's enzymatic dideoxy method and Maxam and Gilbert's chemical sequencing method. Indicates that studying these methods provides students with knowledge of the chemical structure of DNA and how DNA sequence data are obtained. (JN)

Procedures for recovering silver and cobalt from laboratory wastes (including those resulting from student experiments) are presented. The procedures are generally applicable since only common, inexpensive laboratory reagents are needed. (JN)

Background information, procedures used, and typical results obtained are provided for an experiment in which the stability constants of unstable complexes are determined. (JN)