[Localization of callose in microspores and pollen grains of Sium latifolium plants under different water regimes].

Results of study of callose content and its topography in mother cells of microspores, microspores and pollen grains in terrestrial and air-aquatic S. latifolium plants growing under different water regimes are presented. The increased content of callose in the microspore walls at tetrad stage and pollen grains is revealed on the basis of fluorescence intensity and quantitative luminescent analysis of terrestrial S.

Remote helicopter-borne detector for searching of methane leaks.

Measurements of the content of various molecular impurities in the ambient air using helicopter- and aircraft-borne systems represent an extremely urgent challenge. In this respect, of special interest are the devices that that provide leakage monitoring in gas lines in order to prevent emergencies. In the paper results of the tunable diode laser-based instrument development and testing are presented.

UF6 enrichment measurements using TDLS techniques.

The objective of this work was investigation of possibility of tunable diode laser spectroscopy (TDLS) technique application for gaseous uranium hexafluoride (UF6) isotope measurement. Spectra of uranium hexafluoride gas mixture were investigated using two different Fourier Transform Spectrometers Vector 22 and Bruker 66v. Observed spectral features were identified and model spectra of different gas mixture components were developed.

[Membrane action of ionic surfactants on yeast cells].

Effect of a number of homologous series of cationic and anionic surfactants on yeast cells was examined. It is found that the cellular proteins extraction degree under the surfactants treatment depends on the agents structure. It is established that the highest extraction efficiency among the bisquaternary ammonium compounds is displayed by the decyl derivatives and among sodium alkyl sulfates--by octyl sulfate.