[Oxidase activity of horseradish peroxidase in oxidation of the bilirubin-albumin complex]. / Oksidaznaia aktivnost' peroksidazy khrena v okislenii kompleksa bilirubin-al'bumin.

The catalytic activity of horseradish peroxidase was investigated upon oxidation of the bilirubin-albumin complex (10(-5)-10(-4) M; BR: SA = 1: 1.5 mol/mol) by dissolved oxygen to biliverdin and other components. The process can be described by the Michaelis-Menten equation with Km = 14.4 microM and Vmax = 0.12 microM/min, if HRP = 3.1 x 10(-8) M. Oxidation is supposed to proceed in the triple complex--peroxidase: albumin: bilirubin.

[Radiation control in roentgenologic studies]. / Radiatsionnyi kontrol' pri rentgenologicheskikh issledovaniiakh.

A program named KODR (dosimetric monitoring of irradiation in radiodiagnosis) was developed for the SM-4 computer to ensure regional radiation monitoring. On the basis of statistical data on the distribution of x-ray studies the program made it possible to define collective effective equivalent doses and a mean value of an effective equivalent dose for one person in a given region.

[Analysis of errors in the determination of the collective equivalent dose in x-ray diagnostic studies]. / Analiz pogreshnostei v opredelenii kollektivnoi éffektivnoi ékvivalentnoi dozy pri rentgenodiagnosticheskikh issledovanii.

The paper is devoted to an analysis of random errors in the determination of a collective effective equivalent dose resulting from radiodiagnostic investigations. The error of a collective dose does not exceed 30% and hardly depends on dose errors in human organs and tissues. The authors have established an extent of overestimation of the risk of long-term radiation effects in patients after x-ray investigations.

[Equivalent doses in x-ray studies]. / Ekvivalentnaia doza pri rentgenologicheskikh issledovaniiakh.

The authors proposed a method of estimation of equivalent doses in x-ray investigations permitting the control of a possibility of the development of nonstochastic effects. They also considered a method for calculation of equivalent doses in x-ray investigations in the head and neck area and the rest of the patient's body.

[Radiation-health aspects of methods of x-ray study of the esophagus and stomach]. / Radiatsionno-gigienicheskaia kharakteristika raznykh metodik rentgenologicheskogo issledovaniia pishchevoda i zheludka.

The authors considered technological chains of various methods of X-ray investigations of the upper part of the G.I. tract indicating the time of performance of each stage of investigation, equivalent and effective equivalent doses. Dose exposure of patients should be taken into account at each stage and during the entire investigation while choosing methods of investigation.