Education in analytical chemistry in the U.S.S.R.

Analytical Chemistry is taught at over 600 schools of higher education in the U.S.S.R. Contents of general and special courses are described in this article. The main problems and objectives of education at universities are mentioned.     

Zur Polemik Prof. Dr. Georg Wiegner's in Zürich mit Prof. Dr. R. Gans in Berlin

Ohne Zusammenfassung     

Elektroosmose in Mehrschichtendiaphragmen 1. Mitt.

Ohne Zusammenfassung     

Proton N.M.R. lineshape in nematic microdroplets

The dependence of the proton N.M.R. absorption spectrum on nematic director configuration and molecular self-diffusion in nematic submicrondroplets is analysed. The lineshape is evaluated numerically for radial and bipolar director configuration. The motional averaging is taken into account by means of a numerical simulation of the molecular diffusion which induces slow molecular reorientations due to non-uniform orientational ordering in the droplet. This diffusion process strongly affects the absorption spectra of the radial configuration, whereas spectra of the bipolar configuration are only slightly influenced. The possibility of determinating the submicrometre nematic droplet structures using the proton N.M.R. lineshape is discussed.     

Experimental Resolution and Brand Profile in F.T.-I.R. Spectroscopy

The minimum possible number of sampling points (N) to achieve rapid and accurate scan and the best I.R.-F.T. spectra in terms of resolution, height (H) half height band width (HH) are discussed. The experimental resolution, for a particular number of data points, was measured from the distance of any newly evolved peak from its closest neighbor when increasing N in a water vapour interferogram; the experimental curve is close to the theoretical one. H and HH of any peak are found to increase and decrease respectively when the optical path is enlarged up to a certain limit and thereafter, they become almost constant. Taking informations with further values of N merely adds noise with no sign of improvement in the spectra.