Medical student dermatology research in the United States.

The development of academic researchers is important for the future success of dermatology, but few dermatology trainees are entering academic practice in the United States. Because many successful researchers begin to focus on research skills during medical school, an electronic survey was conducted to evaluate dermatology research opportunities and benchmarks for U.S.

[Head-space gas chromatographic analysis in the rapid diagnosis of anaerobic infections].

The comparison of the results obtained by the gas-chromatographic vapor-phase analysis and by the bacteriological analysis of exudate samples, taken from patients with intraperitoneal and intrapleural infections, has demonstrated high reliability of the chromatographic method. Despite the presence of some discrepancies between the results of the vapor-phase analysis and the bacteriological analysis due to the difficulties of the microbiological isolation of anaerobes and the specific features of their metabolism, the diagnostic value of the gas-chromatographic method has been confirmed.

Gas chromatographic-mass spectrometric determination of volatile organic compounds in an urban atmosphere.

Polysorbimide and carbochrome, new sorbents with high temperature stability, have been used to concentrate trace amounts of atmospheric pollutants, and 136 C1-C13 organic compounds, including 126 hydrocarbons, 6 oxygen derivatives and 3 chlorides, were identified in air samples collected in the streets of Leningrad. One of the major features of the composition of the organic constituents of the urban air sampled is the presence of a number of CnH2n hydrocarbons (mainly olefins), and also CnH2n-2 and CnH2n-4 unsaturated hydrocarbons (including alpha-pinene and camphene). A comparison of the results with those of similar studies carried out on air samples from Zürich, Houston and Paris is of considerable interest in connection with the possible effect of geographical factors on the composition and lifetime of organic pollutants in the atmosphere.