For proper use of multiple-channel dictation equipment, consideration should be given to seating arrangement, observation techniques, "reading back procedures, practice speeds, transition from textbook copying, and classroom management procedures which facilitate learning. (CH)

Argues that as well as obtaining a subject's informed consent a researcher is ethically obliged to furnish financial protection to research subjects. Discusses possible methods of insurance. (EB)

Describes the construction of a low-cost handmade apparatus for the electrolysis of water that is durable enough to endure rough treatment. (JRH)

Examines the assumption that instruction in writing centers is what it is because it is different from classroom instruction. Proposes studying the discourse of writing centers as another route to writing center self-definition. (RS)

Draws on experience at Worcester Polytechnic Institute to argue that recent trends in writing center theory and practice see literacy as a multimodal activity in which oral, written, and visual communication intertwine and interact. (NH)

Explores the problems associated with laboratory workstation exhaust faced by most colleges and universities and explains how the selection of a proper fume hood exhaust system can prevent or eliminate these problems and provide a clean and safe lab environment. Also highlighted are indoor air quality legal implications. (GR)

Uses two laboratory techniques, Enzyme Linked Immunosorbent Assay (ELISA) and Western Blot, to demonstrate antibody-antigen binding concepts. Includes a list of required materials and directions for the procedure, and makes suggestions for classroom applications. (Contains 13 references.) (YDS)

Investigates changes in students' understanding of various aspects of measurement before and after participating in two different introductory laboratory courses at two universities in South Africa. Considerable gains were made during instruction with both groups, though some important differences were identified between them. Neither group could…

Asbestos has been used in the construction of elementary, middle, and high school ceilings, floor tile adhesives, pipe and structural beam insulations, science laboratory benches, wire gauss on ring stands, fume hood panels, general insulation, and more during the 1950s through early 1970s. Why? Primarily asbestos was selected because of its…

We have developed an "in vitro assay" for following the interaction between the [alpha][subscript i2] subunit and [beta][subscript 1[gamma]2] dimer from sf9 cells. This method is suitable for education purposes because it is easy, reliable, nonexpensive, can be applied for a big class of 20 students, and avoid the commonly used kinetic approach,…

The lab experiment described starts from the principles developed by Sensel and Myers, but the experimental procedure are modified to provide a more reliable experiment assessment. The mass transfer equation is solved and all the involved parameters are calculated by a simple, numerical method.

A laser spectrometer for the ethylenediaminetetra-acetic acid (EDTA) titration of magnesium or calcium ions that is designed around a handheld laser pointer as the source and a photoresistor as the detector is developed. Findings show that the use of the spectrometer reduces the degree of uncertainty and error in one part of the EDTA titrations,…