[Medical gels for ultrasonographic diagnosis, therapy and electrocardiography].

The All-Russian Research Institute of Medical Polymers has designed the medical gels REPAC, DIAGEL, for ultrasound diagnosis, REPAC-T for ultrasound therapy, ELCON and ELCARD for electrocardiography. REPAC, DIAGEL, and REPAC-T have the least sound damping factor (approximately 10(-3) dB/cm) as compared to other similar gels. REPAC and DIAGEL showed a good performance when they were applied in clinical practice during a year.

[Determination of the sorption properties of microplates for immunoenzyme analysis].

The authors have examined the possibility of using horse radish peroxidase for assessment of the sorption characteristics of microplates for enzyme immunoassay; the results obtained by the technique modified by the authors and by one of the routine methods (the direct method) were in high correlation. Sorption capacities and homogeneity of the plates manufactured in Leningrad and abroad were compared; the plates made in this country were found inferior to foreign ones in respect of both parameters almost twofold. Sorption capacity of the microplates may be improved by gamma-irradiation; the optimal irradiation dose was defined: 1.

Structure and transport properties of the Ultracell membrane for hemodialysis.

Particular features of structure and transport properties of a new Soviet-made hydrate cellulose membrane Ultracell have been studied. The membrane has a structure of a swollen gel with well defined macropores that ensures high effectiveness in convectional transport of substances across the membrane. In view of the above the Ultracell membrane may be used both for conventional hemodialysis and also for hemodialysis with simultaneous or consecutive ultrafiltration aimed at removing the excessive water and metabolites with middle molecular weight.