Discusses progress made over the last two decades concerning the synthesis and possible unification of the three interactions (strong, electromagnetic, gravitational) relevant to high energy experiments. Areas addressed include quantum field theories, a unified quantum field theory, connection with cosmology, and possibilities for further…

Demonstrates construction of density constant and refractive index constant lines in triangular coordinate system on basis of systematic experimental determinations of density and refractive index for both homogeneous (single-phase) ternary liquid mixtures (of known composition) and the corresponding binary compositions. Background information,…

Reports results of experiments favoring use of 0.5 percent nitric acid with an oxidant (potassium dichromate or potassium permanganate) to preserve samples in polyethylene containers for mercury analysis. Includes procedures used and statistical data obtained from the experiments. (JN)

Many properties of new particle field theories can only be tested by comparing their predictions about the physical conditions immediately after the big bang with what can be reconstructed about this event from astronomical data. Facts/questions about big bang, unified field theories, and universe epochs/mass are among the topics discussed. (JN)

Annotates one book dealing with astronomy, two with energy and engines, and two with scientific experiments. (FL)

Preparation of cis and trans isomers of the kinetically labile bis glycinato copper (II) has a number of advantages including its facility, economy, ready theoretical interpretation, and biological relevance. Background information, laboratory procedures, results/discussion are provided for this experiment which can be completed in a single,…

Discusses catalytic properties of clays, attributed to acidity of the clay surface. The formation of carbonium ions on montmorillonite is used as a demonstration of the presence of surface acidity, the enhanced dissociation of water molecules when polarized by cations, and the way the surface can interact with organic substances. (Author/JN)

Issues of reliability and validity in ethnographic design are compared to their counterparts in experimental design. Threats to the credibility of ethnographic research are summarized and categorized. Strategies intended to enhance credibility (study design, data collection, data analysis, and presentation of findings) are incorporated throughout…

A science research program in Ohio using community laboratories and personnel offers gifted high school students the chance to become involved with scientists in a variety of research experiences. Cooperation between community based staff and program staff is critical. Results of the six-year program have been very favorable. (CL)

Three experiments are described to remedy a deficiency in descriptive chemistry content in introductory courses. Experiments focus on properties of metals, nonmetals, and gases. (JN)

This experiment presents one direct titration for water soluble base and an indirect titration after dissolving a sample (oak ashes) in a known excess of acid. A titer method of calculation is given to allow use by students without knowledge of molarity-volume-mole calculations. (Author/JN)

Describes the functions, applications, and future of the BioVideograph BV2, a measuring instrument which allows analogue data to be encoded on a videotape in synchrony with the audio and video tracks to re-create original experimental data on appropriate instrumentation during replay of the videotape. A picture and diagram are included. (JJD)

Describes how a sulfate-iodide "clock reaction" experiment can be used to emphasize the importance of observations and hypotheses in revealing cause-effect relationships. Investigative steps, theory, experimental principle, procedure, and the experiment report are discussed. (CS)

Procedures are provided for separating the principal metalloproteins (albumin, ceruloplasmin, and transferrin) from plasma using column chromatographic techniques. The experiment can be completed in two separate three-hour laboratory periods during which column chromatography is illustrated and the effect of pH on charge and affinity of a protein…

Outlines advantages of and provides background information, procedures, and typical student data for an experiment determining rate of hydration of p-methyoxyphenylacetylene (III), followed by nuclear magnetic resonance spectroscopy. Reaction rate can be adjusted to meet time framework of a particular laboratory by altering concentration of…