Describes a demonstration that shows the absorption spectrum of chlorophyll. Uses an overhead projector, a solution of chlorophyll, and a diffraction grating. (RT)

Develops a manostat which is simple and inexpensive to construct and operate, compact and rugged in design, useful over a wide pressure range, and well adapted for practical usage. Provides methodology, a diagram, and some operating suggestions. (MVL)

Described is an experiment which uses an autotrophic bacterium to anaerobically oxidize hydrogen sulfide to sulfate in a batch-stirred tank reactor. Discusses background information, experimental procedure, and sample results of this activity. (CW)

Describes this year's chemistry exhibition held in Japan and sponsored by the Chemical Society of Japan. Summarizes the purposes, preparation, and the activities of the exhibition. (YP)

Proposes a simple procedure based on an expansion of the exponential terms of Raoult's law by applying it to the case of the benzene-toluene mixture. The results with experimental values are presented as a table. (YP)

Describes a high school chemistry competition at the University of Maryland (College Park). Basic guidelines, organization, events, and evaluation of the competition are provided. A list of events is presented. (YP)

Presents activities based on readings from ChemEcology that incorporate student writing with thinking skills as part of a reading/writing portfolio. Helps students to develop a broader understanding of chemistry, the chemical industry, and the environment. (JRH)

Describes a computer program that can model the equilibrium processes in the production of ammonia from hydrogen and nitrogen, sulfur trioxide from sulfur dioxide and oxygen, and the nitrogen dioxide-dinitrogen tetroxide equilibrium. Provides information about downloading the program ChemEquilibrium from the World Wide Web. (JRH)

Analyzes environmental chemistry courses taught at Princeton University. Discusses the importance of contextual and narrative linkages in teaching environmental chemistry. (JRH)

Describes a chemistry course that is built around the topic of radioactive waste and encompasses a large number of chemistry concepts including redox, equilibrium, kinetics, nuclear energy, and the periodic chart. (JRH)

Gives an overview of the World Wide Web, describes what is required to access it, and highlights some of the features of interest to chemists such as Web-based chemical databases that feature user-interactive molecular structures and chemical movies. Lists Internet chemistry resources designed for Web browsers and locations for obtaining Web…

Outlines the social and cultural background, education, and scientific contributions of Percy Lavon Julian, an African American natural product chemist. Presents and analyzes traits and abilities relevant to his growth, development, and survival and some of his thoughts on the nature of science, the relationship between science and the humanities,…

Discusses the use of science history and etymology in science instruction in order to maintain students' interest. Presents a specific example of the historical background of pharmacology. (JRH)

Describes historic aspects of color or coloring. Presents activities involving spectral colors identified by Sir Isaac Newton and others involving dyes and dyeing. (MKR)

Describes the Iowa General Chemistry Network that was developed to change content, teaching, and learning methods of introductory college chemistry courses. Highlights include using the Iowa Communications Network for distance education and curriculum reform, using the Internet and World Wide Web, and chemistry laboratory experiences and…