Describes new methods of collecting and examining ciliates, particularly those found in the sediments of lakes, rivers, and estuaries. Discusses extraction methods in preparation for observations in the classroom. Suggests investigations of ciliate ecology as an area of increasing research interest. (JM)

Provides procedures for the study of osmosis and anthocyanin pigments utilizing wet mount techniques with purple onion. Suggests several activities using this preparation. (JM)

Describes a five-period experiment which: (1) integrates preparative and analytical techniques; (2) utilizes a photochemical reaction that excites student interest both from visual impact and as an introduction to photoinduced processes; (3) provides accurate results; and (4) costs less than $0.20 per student per laboratory session. (JN)

Teachers deserve to have appropriate training before they are held accountable for teaching about computer hardware and software, and the responsibility for this training falls to the teacher training institutions. Such a computer literacy program has been instituted at Abilene Christian University (Texas). (DCS)

Described is a bioluminescent assay for adenosine triphosphate (ATP) and reduced nicotineamide-adenine dinucleotide (NADH) that meets the requirements of an undergraduate biochemistry laboratory course. The 3-hour experiment provides students with experience in bioluminescence and analytical biochemistry yet requires limited instrumentation,…

Describes a method which adapts itself to the characteristics of the kinetics of a chemical reaction in solution, enabling students to determine the Arrhenius parameters with satisfactory accuracy by means of a single non-isothermic experiment. Both activation energy and the preexponential factor values can be obtained by the method. (JN)

Discusses recent developments in the instrumentation and practice of analytical scale operations. Emphasizes detection devices and procedures in gas chromatography, liquid chromatography, electrophoresis, supercritical fluid chromatography, and field-flow fractionation. (JN)

Discusses: (1) rationale for chemical sensors in process analysis; (2) existing types of process chemical sensors; (3) sensor limitations, considering lessons of chemometrics; (4) trends in process control sensors; and (5) future prospects. (JN)

Describes a laboratory activity which provides practical experience in wiring an electrical circuit with line voltage and everyday components. Students use wooden frames, bulbs, wire, fuses, and switches to test their wiring skills. (DH)

Discusses structures and characteristics of sulfur compounds which cause the odor of garlic and the crying which may result from an onion. These compounds are dependent on conditions of extraction and account for medical properties long ascribed to garlic and onions. (DH)

Describes an experiment which demonstrates changes in ammonia excretion and urine pH that occur in response to metabolic acidosis (induced by ammonium chloride ingestion) or metabolic alkalosis (produced by sodium bicarbonate ingestion). List of materials needed and background information are included. Typical results are provided and discussed.…

Discusses benefits and pitfalls of networking or disk-sharing in computer labs where microcomputers are connected to a central disk drive which runs one program for all microcomputers at one time. Copyright and software compatibility from educators' and publishers' perspectives, costs, time factors, and educational objectives are included in the…

Reviews literature on amperometric, bipotentiometric, and coulometric titration methods examining: apparatus and methodology; acid-base reactions; precipitation and complexing reactions (considering methods involving silver, mercury, EDTA or analogous reagents, and other organic compounds); and oxidation-reduction reactions (considering methods…

Reviews literature dealing with novel developments or important trends in electrochemistry. Areas examined include mass transfer, electrode kinetics, surface effects, chemically modified electrodes, coulostatic/galvanostatic methods, bioelectrochemistry, spectroelectrochemistry, and electrode instrumentation. Books, textbooks, and literature…

Presented is a review of selected literature on emission spectrometry published during 1982 and 1983. The review is organized under these headings: books and reviews; spectral descriptions and classifications; instrumentation; standards, samples, nomenclature, calibration, calculations; excitation sources; selected applications; and meetings. (JN)