This report details several simulated divinq experiments on the human. These are suitable for undergraduate or graduate laboratories in human or environmental physiology. The experiment demonstrates that a diving reflex is precipitated by both facial cooling and apnea. (Author/RE)

Explains the benefits and strengths of having safety checklists in science laboratories. Presents a checklist that reflects important components of safety that address many situations in school laboratories. (NB)

Discusses the importance of involving students in assessing the risks versus the benefits of specific laboratory activities, completing accident/incident reports, and performing periodic safety inspections. Concludes that involving students enhances their awareness of both hazards and precautions that must be taken. Provides them another avenue…

Presents a checklist as a guide for preparing a set of safety rules that has been adapted from the U.S. Consumer Products Safety Commission's publication titled "School Science Laboratories: A Guide to Some Hazardous Substances". Addresses work habits; safety wear; facilities and equipment; purchasing, use, and disposal of chemicals; and…

Five technology teachers describe how they would design the technology laboratory for the future. What it would look like, who would use it, what kind of activities would be done in it, the required equipment and supplies, and the expense of the lab are discussed. (KR)

Studied reducing the number of slides submitted by candidates taking the histology technician examination of the American Society of Clinical Pathologists. Results from 145 candidates show that slides can be reduced from 15 (with coverslipping and block preparation scores) to 9 without affecting the mean ability level of candidates and only a…

Reports on a research project to determine if students possess and comprehend basic safety knowledge. Shows a significant increase in the amount of safety knowledge gained when students are exposed to various topics in laboratory safety and are held accountable for learning the information as required in a laboratory safety course. (Author/MM)

Thin-layer chromatography (TLC) methods are successfully used in many areas of research and development such as clinical medicine, forensic chemistry, biochemistry, and pharmaceutical analysis as TLC is relatively inexpensive and has found widespread application as an easy to use, reliable, and quick analytic tool. The usefulness of TLC in organic…

A procedure by which the reactions are used to quantitatively determine the amount of total acid, the amount of total ascorbic acid and the amount of citric acid in a given sample of powdered drink mix, are described. A safe, reliable and low-cost quantitative method to analyze consumer product for acid content is provided.

Some Wittig reactions can be carried out by grinding the reactants in a mortar with a pestle for about 20 minutes, as per investigation. A laboratory experiment involving a solvent-free Wittig reaction that can be completed in a three-hour sophomore organic chemistry laboratory class period, are developed.

A chemical laboratory information profile (CLIP) is presented for the chemical, stearic acid. The profile lists the chemical's physical and harmful characteristics, exposure limits, and symptoms of major exposure, for the benefit of teachers and students, who use the chemical in the laboratory.

An experiment to demonstrate the use of ethylene ketal as a protecting group, one that can be completed in four lab periods, is described. The hydroxy ketone like 4-hydroxy-4, 4-diphenyl-2-butanone formed during the reaction can be identified by its melting point, IR, and (super 1)H NMR.

A series of sophisticated, combined laboratory experiments are developed involving the use of various spectroscopic and other techniques in the conformational analysis of cyclohexane mechanisms. The multi-system approach enables the students to transcend the one-dimensional procedure, and develops their synthetic and diagnostic skills.