[Volatile metabolites in expired air of humans during 5-day dry immersion].

Both gas chromatography and mass-spectrometry were used to analyze make-up of air expired by 7 human subjects in a dry immersion (DI) experiment simulating some of the effects of microgravity. It was found that 5-d DI produces significant increases in expired amines, chiefly butylamine, 2-cyanacetimide, some aldehydes (isobutyl aldehyde, benzaldehyde), polyols (ethylene glycol, butyldiol), phenol, phenyl acetylene, ketones (methyl-ethyl-ketone), butylacetate and a significant decrease in fatty acids.

Comparison of performance parameters of photothermal procedures in homogeneous and heterogeneous systems.

The main types of analytical procedures used in thermal-lens spectroscopy and microscopy, which are based on photometric reactions in (i) aqueous solutions, (ii) organo-aqueous mixtures, (iii) polymer-containing (nonionic surfactants or polyethylene glycol) aqueous solutions, (iv) water-organic extraction systems, and (v) two-phase aqueous extraction systems, were compared from the viewpoint of both reproducibility and sensitivity. This comparison was made by examples of the determination of cobalt and iron for batch conditions, flow determination, and detection in HPLC, flow-injection analysis (FIA), and µFIA. It was revealed that for all five types, the real analytical efficiency (a decrease in the limit of detection (LOD) as compared to spectrophotometry) is primarily determined by the reaction conditions, provided that excitation of the thermal lens is the same.

[Postoperative analgesia].

Data of 53 patients, operated on infrarenal aorta and large vessels were analyzed. Different combinations of nonopioid drugs were compared, used postoperatively. These were: ketoprofen+tramadol; lornoxicam+tramadol; paracetamol+tramadol; paracetamol+lornoxicam+tramadol.