Presents a criminalistics laboratory experiment of benzidine rearrangement and the detection of trace quantities of blood which does not utilize carcinogens. (SL)

Reports on the use of demonstration/experiment using silver ions in water purification. (SL)

Describes an advanced physical or inorganic chemistry experiment in determining the rate law of chemical reactions which demonstrates unusual behavior of k-obs. (SL)

Describes an introductory photochemistry experiment using the ohotohydration of pyridine in aqueous solutions to illustrate many physical aspects of photochemistry. (SL)

Describes an experiment revealing a visual latency effect produced by the wearing of sunglasses. (SL)

Describes physics experiments and demonstrations on the measurement of electrostatic fields. (SL)

Describes an experimental demonstration of entropy utilizing a rubber band. (SL)

Describes a holographic method of producing a picture of a real lens, objects, and the virtual image of the objects. (SL)

Describes an experiment demonstrating the frustration of totally reflected visible light. (SL)

Describes procedure for making X-ray photographs on Polaroid 3000 black and white roll film. (SL)

Shows how the Archimedes method is used to determine the density of a single crystal of ammonium oxalate monohydrate. Also shows how to calculate the density of other chemicals when they are available as single crystals. Experimental procedures and materials needed are included. (JN)

Reports a consecutive first-order reaction for which the concentrations of reactant, intermediate, and products can be determined simulataneously. This reaction is the epoxidation of 2,5-di-tert-butyl-1,4-benzoquinone (I) by alkaline hydroperoxidation using tert-butyl hydroperoxide and benzyltrimethylammonium hydroxide (Triton B) catalyst.…

Explains an experiment in which the rotation of a patch of skin on a tadpole results in a frog with rotated spots, proving that the spot pattern is determined long before it becomes visible. Procedures used are included. (DH)

Points out the benefits of "sciencing"--helping children learn the methodology and processes of scientific investigation through the use of play experimentation. (SKC)

Provides an overview on biological electron-transfer reactions, summarizing what is known about how distance, spatial organization, medium, and other factors affect electron transfer. Experimental approaches, including studies of bimolecular electron transfer reactions (electrostatic effects and precursor complexes), are considered. (JN)