Gel-Forming Soil Conditioners of Combined Action: Laboratory Tests for Functionality and Stability.

The research analyzes technological properties and stability of innovative gel-forming polymeric materials for complex soil conditioning. These materials combine improvements in the water retention, dispersity, hydraulic properties, anti-erosion and anti-pathogenic protection of the soil along with a high resistance to negative environmental factors (osmotic stress, compression in the pores, microbial biodegradation). Laboratory analysis was based on an original system of instrumental methods, new mathematical models, and the criteria and gradations of the quality of gels and their compositions with mineral soil substrates.

[Application of the capillary electrophoresis technique for the study of the products of explosion and combustion of mixed explosives and pyrotechnic compositions in the forensic medical practice].

The authors describe methods of cation-anion analysis of aqueous media by the capillary electrophoresis technique with reference to the detection of the products of explosion and combustion of mixed explosives and pyrotechnic compositions. The possibility to use the results thus obtained for the study of an explosion injury is discussed. Optimal conditions for the separation of chloride, nitrite, nitrate, sulfate, sulfide, chlorate, and perchlorate ions are determined.

[Uroflowmeter, a device for measuring urine volume and urination rate].

The paper deals with the design and construction of a float-type uroflowmeter that is characterized by higher reliability, precision, validity of measurements. The characteristics of the device have been improved by excluding a sliding contact which operates in the corrosive medium, by applying a primary gauge whose output signal is proportional to the instantaneous value of urinary debit.