Describes the use of atomic spectra that are excited in inductively coupled plasmas for the simultaneous or sequential determination of the elements at all concentration levels. (HM)

Describes two demonstration experiments for the chemistry laboratory: (1) Thermodynamic vs kinetic control and (2) Acid-Catalyzed Hydrolysis of Starch. (MA)

It is suggested that the work of Kammerer provides suitable material, in the form of case studies on which to base discussions of Lamarckism versus Darwinism. A set of structured problems is described as an example of possible problem-solving exercises, and further experiments to extend Kammerer's work are outlined. (Author/MA)

Methods are described for the induction and identification of respiratory deficient mutants in yeast. Practical schemes are given to enable students to obtain dose-response information for physical and chemical mutagens such as heat, ultraviolet light, or acriflavine. A simple test for environmental mutagens is described. (Author/MA)

Describes the construction and use of a simple apparatus to measure the magnetization density and magnetic susceptibility of ferromagnetic, paramagnetic, and the diamagnetic solids and liquids. (Author/GA)

Principles, experimental procedures, results, and discussion of this method are included here. The method was used in undergraduate laboratory courses in Toulouse, France. (BB)

The rhizosphere is the area directly surrounding the roots of a plant and an area of tremendous microbial growth. This article described techniques for studying this soil biome. Illustrations are included. (MA)

Describes an experiment used to demonstrate the relationship among hypertonic, hypotonic, and isotonic solutions and provides and open-ended research opportunity for additional individual investigation by students. (Author/MA)

Describes an experiment illustrating the absorption in the ultraviolet region to provide a simple spectrometric analytical method. (SL)

Presents details of demonstrations illustrating cathodic protection using a photovoltaic source and optical rotation. (SL)

Describes a thought experiment using a general analysis approach with Lorentz transformations to show that the apparent self-contradictions of special relativity concerning the length-paradox are really non-existant. (GA)

This science teacher's laboratory is a pond within walking distance of his school that provides a stimulating environment for exploring the natural world. With simple materials students practice making careful observations, taking measurements and compiling and graphing information for their science studies. They also extend their pond experiences…

Presents an experiment for a physical chemistry course designed expecially for students majoring in the life sciences. (SL)

Describes a simple procedure for making all-round holograms of small objects. (SL)

Describes a chemical experiment which illustrates the Beckman rearrangement and ring opening reactions. (SL)