A previous part (Analytical Chemistry; v57 n9 p1057A) discussed the theoretical aspects of diode ultraviolet-visual (UV-VIS) spectroscopy. This part describes the applications of diode arrays in analytical chemistry, also considering spectroelectrochemistry, high performance liquid chromatography (HPLC), HPLC data processing, stopped flow, and…

Examines energy interconversions in photosynthesis, limiting the discussion to areas pertinent to chemistry (particularly the energetics of the light reactions). Topic areas considered include bioenergetics, photochemistry, conversion of light energy into electrical potential energy, the chemiosmotic hypothesis, and others. (JN)

The National Science Foundation's College Science Instrumentation Program (CSIP) provides four-year colleges with money to buy modern instruments. Accomplishments of the program during its first year (including 234 awards totaling $5.5 million) and future directions are summed up by Robert F. Watson, head of the CSIP program. (JN)

Discusses polymerization evaluation by spectrophotometric measurements by considering: (1) association degrees and molar absorptivities; (2) association degrees and equilibrium constants; and (3) absorbance and equilibrium constants. (JN)

Discusses some of the latest developments in the chemistry of printed circuit substrates. Topics considered include soldering, dicy (a catalyst), Kevlar (an aramid polymer fiber), maleimide copolymers, and flexible circuits. (JN)

Describes a rapid, visual demonstration of protein separation by gel filtration chromatography. The procedure separates two highly colored proteins of different molecular weights on a Sephadex G-75 in 45 minutes. This time includes packing the column as well. Background information, reagents needed, procedures used, and results obtained are…

Presents a short set of carbon-13 nuclear magnetic resonance (NMR) tables. These tables not only serve pedagogic purposes but also allow students to do calculations rapidly and with acceptable accuracy for a wide variety of compounds. (JN)

Fourier transform nuclear magnetic resonance (NMR) is a new spectroscopic technique that is often omitted from undergraduate curricula because of lack of instructional materials. Therefore, information is provided to introduce students to the technique of data collection and transformation into the frequency domain. (JN)

Heat is defined as a random or nondirected internal energy transfer between different bodies at different temperatures. Work is defined as oriented or nonrandom internal energy transfer. Both heat and work are demonstrated to lead to increases in temperature via interpretations from gas kinetic theory. (JN)

The ability of a microcomputer to execute several programs at the same time is called "multitasking." The nature and use of one multitasking operating system Concurrent PC-DOS from Digital Research (the developers of the CP/M operating system) are discussed. (JN)

This review of standard atomic weights is written chiefly for chemical analysts who may place too much confidence in the accuracy of these values. Topics considered include Frank Clarke's atomic weights, effects of radioactivity and other anomalies in isotopic abundance, atomic weight limitations from experimental uncertainties, and others. (JN)

Describes steps (using monochiral and multichiral molecules) to enable students to arrive with relative ease at correct stereochemical relationships. The approach assumes familiarity with Fischer projection formulas and assignment of R and S absolute configurations. (JN)

Box-and-whisker plots (which give rapid visualization of batches of data) can be effectively used to present diverse collections of data used in traditional first-year chemistry courses. Construction of box-and-whisker plots and their use with bond energy data and data on heats of formation and solution are discussed. (JN)

Describes a physical/organic chemistry experiment on conductance behavior of hydrogen-bonded species of six salts of easily accessible, nitrogen-containing bases and halogenoacetic acids. The bases and acids used are much cheaper and have comparatively less unpleasant odors than the pyrim puridines and trifluoroacetic acid used in previously…

Reviews various spectroscopic techniques currently used to analyze real physical surfaces that bound two actual phases. Problems inherent in analyzing these surfaces and possible approaches that may be taken are considered. (JN)