Presents a recipe for the Nylon Rope Trick, which is considered to be one of the most spectacular demonstrations in chemistry. Materials for growing the polymer and some safety precautions are given. (SA)

Three methods are given for the synthesis of N-4 substituted sulfonamides. An example elucidates the procedures involved in one of the methods. The example is intended as a model for students. (SA)

Conservation education in Pennsylvania includes: (1) use of an animal character to teach environmental concepts; (2) a revolutionary war fort, and adjacent nature park that mixes nature with history; (3) a nature center that revives American Indian appreciation of nature; and (4) a watershed study to relate chemistry to the study of environmental…

A description is given of a computer-assisted instruction program on polymer properties in chemistry. (MK)

Describes the source of hexamethylenediamine (HMDA). The process of the original synthesis HMDA for nylon manufacture which started with adipic acid and the estimated production cost for alternative HMDA processes are included. (HM)

Presents one of the themes of a French chemistry college laboratory course, which concerns the field of solid state chemistry and is focused on the study of the cation distribution in the case of certain spinel ferrites. (HM)

Various phenomena in chemistry and biology can be understood through Gibbs energy utilization. Some common phenomena in chemistry are explained including neutralization, hydrolysis, oxidation and reaction, simultaneous dissociation equilibrium of two weak acids, and common ion effect on solubility. (Author/SA)

An explanation of strong base effect demonstrates that deprotonation of a reactant shifts an equilibrium toward reactants in the same way that a deprotonation of a product shifts it towards products. (Author/SA)

Presented three algorithms to university students in an introductory laboratory chemistry course and found that differences in the effects of representation modes--flow charts, lists, and standard prose--were complex and changed over 10 lab sessions. There was no evidence that representation mode affected critical thinking ability or final grade.…

Demonstrations of Boyle's Law and of the relationship of gauge pressure and atmospheric pressure are presented. (BB)

A study conducted during the 1977-78 academic year in four Oregon community colleges indicated that mathematics proficiency is related to success in first-quarter chemistry, but that beginning students do not have strong mathematics skills. (BB)

A brief review of the chemistry and pharmacology of aspirin and other nonprescription analgesics such as acetaminophen, phenacetin, and salicylamide. (BB)

Describes a paper chromatography experiment designed for fifth and sixth grade students. Utilizes common materials that need no special ordering. Background information, conclusion questions, and sample chart are included. (MA)

Discusses several examples of the modern mathematics familiar to the pupils at the age where the mole concept is introduced, to help the teacher adopt an appropriate approach when dealing with this topic. (GA)

Techniques for digitalizing analog signal data are presented and compared. The techniques presented are: boxcar averaging, ensemble averaging, unweighted digital filter, weighted digital filter, and analog filter. (BB)