[The updated techniques for the detection of diatomic plankters in the corpse after death by drowning].

The authors report investigations carried out with a view to improving the method for the detection of diatomic plankters for the purpose of forensic medical expertise of death by drowning. The methods for studying diatomic plankton present in blood, pericardial fluid, and contents of the sphenoid bone sinus are proposed to be employed for the purpose of differential diagnostics of death by drowning. Specific approaches to sampling cadaveric materials, their preparation and examination by dark field and phase contrast microscopy are described. It was shown that the application of the proposed methods for the investigation of diatomic plankton in cadaveric biological fluids ensures preservation of all planktonic species and thereby significantly improves the quality of analysis and decreases the time needed to perform forensic medical expertise.

[Forensic-medical examination of the effect of current synthetic detergents on the exhibits].

A test for trace quantities of synthetic detergents on fabric is described in detail. Feasibility of detergents identification in the spots on the exhibits with thin-layer chromatography on silufol is shown and cases of such identification in biological material are given for illustration. Adequacy of the results is confirmed. Such investigation in forensic-medical practice will raise informative value of expert certification in cases when standard biological methods are unable to provide necessary precision.

[Efficacy of using different modifications of absorption-elution reaction for the detection of antigen P1 in blood stains]. / Analiz éffektivnosti primeneniia reaktsii absorbtsii-éliutsii v razlichnykh modifikatsiiakh dlia vyiavleniia antigena P1 v piatnakh krovi.

Analyzed in the paper is the absorption-elution reaction (AER) of different modifications that is applied in forensic medical practice for detecting the P1 antigen in bloodstains. The treatment of blood stains by a 10% albumin solution (AER according to L. O. Barsegyants versus AER according to M. F. Vereshchaka) improves chances of detecting a weakly pronounced P1 antigen in bloodstains with a prescription of up to 1 year; the method is of high sensitivity and specificity, it ensures an objective registration of results.