Describes the use of phase transfer conditions to prepare a sulfur and phosphorus ylide. Background information and procedures are provided for the experiment (which can be completed in one three-hour laboratory period). (JN)

Provides instructions and advice on growing the edible mushrooms (Agaricus bisporus) in school. Also suggests several classroom activities using these mushrooms. (JN)

Presented are procedures used to assay the activity of lipase during storage at three different temperatures. Since lipase solutions can decay even when refrigerated, it is recommended that the enzyme be freshly prepared prior to laboratory sessions in which they are used. (JN)

Discusses the behavior, housing, care, diet, and feeding of painted turtles. Also suggests several classroom activities and provides guidelines related to long-term captivity and human disease prevention. (DH)

Presents a sample contract for disposing of hazardous wastes in an environmentally sound, timely manner in accordance with all federal, state, and local requirements. Addresses situations where hazardous waste must be disposed of outside the laboratory and where alternate disposal methods are not feasible. (JN)

Provides procedures to measure the calcium concentration in fruit juice by atomic absorption. Fruit juice is used because: (1) it is an important consumer product; (2) large samples are available; and (3) calcium exists in fruit juice at concentrations that do not require excessive dilution or preconcentration prior to measurement. (JN)

Although it is a major synthetic reaction, the Wittig reaction has not been used in undergraduate laboratories due to the potential hazard and difficulty associated with the preparation/use of the strong bases needed to generate the required ylides. Procedures are presented for an experiment in which these difficulties are avoided. (JN)

Describes an experiment which shows: (1) how measurements of the reaction electromotive force for the cell (Pt/glass/NaCl(aq,m),buffer/AgCl/Ag/Pt) can be utilized in determining the absolute pH of the buffer; and (2) the demonstration of the use of the Debye-Huckel model of an electrolyte solution in solving an important electrochemical problem.…

Discusses the theory of resonance Raman (RR) spectroscopy as it applies to beta-carotene and lycopene pigments (found in tomatoes and carrots, respectively). Also discusses an experiment which demonstrates the theoretical principles involved. The experiment has been tested over a three-year period and has received excellent acceptance by physical…

Background information (including relevant chemical reactions), procedures used, and results obtained are provided for the synthesis and characterization of a macrobicyclic complex. The synthesis can be completed within two to three hours and is inexpensive and safe. Suggestions for further experiments are included. (JN)

Procedures are provided for experiments containing complex ions with octahedral symmetry, hexaamminecobalt(III) chloride and hexaamminechromium(III) nitrate, so students can interpret fully the ultra violet/visible spectra of the complex cations in terms of the ligand field parameters, 10 "Dq," the Racah interelectron repulsion parameters, "B,"…

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)