Provides abstracts of papers and articles in various fields of chemistry as a service for both teachers and students. Lists numerous journals which are considered for articles. (GA)

The premedical and preclinical phases of the present scheme of medical education are described as wasteful of time and money, intellectually deficient, and in need of change. Suggestions are presented relating to establishing a national commission to reform the scheme. (Author/SA)

Suggests the use of a coordinate-free rotation operator for the teaching of rotations in Euclidean three space because of its twofold didactic advantage. Illustrates the potentialities of the coordinate-free rotation operator approach by a number of examples. (Author/GA)

Analyzes three examples of spatial Bose-Einstein condensations in which the particles macroscopically occupy the lowest localized state of an inhomogeneous external potential. The three cases are (1) a box with a small square potential well inside, (2) a harmonic oscillator potential, and (3) randomly sized trapping potentials caused by…

Describes a physics exercise designed for biology and premed majors. The activity is a low intensity laser light scattering laboratory exercise to determine the diameter of micron-sized latex spheres (simulated microbes) in water suspension. (GA)

Shows, by a judicious exploitation of the Runge-Lenz vector, that the Kepler initial value problem is endowed with a nice geometric structure which enables one to determine, after a single trivial arithmetic calculation, the orbit associated with any given set of initial data. (Author/GA)

Shows that von Neumann's mathematical theorem on composite systems acquires a transparent physical meaning with reference to a suitable physical example; a composite system in a state of definite angular momentum. Gives an outline of the theorem, and the results are restated in Dirac's notation, thus generalizing von Neumann's results which were…

Details a procedure for accurately calculating the quantum mechanical energies of hydrocarbons using the perturbational molecular orbital (PMO) method, which does not require the use of a computer. (BT)

Experimental and theoretical data are presented which verifies the existence of the hydronium ion. This existence was confirmed directly by x-ray and neutron diffraction in hydrochloric acid. Recommended is the abandonment of the erroneous hydrogen ion formulation and names such as proton hydrate. (BT)

Describes the new mini-courses in freshman chemistry at Central State University. Compared to the traditional course, it was found that there were fewer withdrawals and that more students were achieving higher grades. (SA)

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)

This is a 53-page cumulative index to the Journal of Geological Education. Ninety-three categories are included and the contents are intended to be more accessible to readers with the establishment of the standard subject matter indexing categories. (Author/SA)

Describes how one logical scheme for the gearing for a multi-speed touring bicycle leads to a set of gear ratios which increase in an exponential function. (BT)

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)