[The ultrasonic diagnosis of the phasic interdigestive activity of the pancreas and the main pancreatic duct in healthy subjects and chronic pancreatitis patients]. / Ul'trazvukovaia diagnostika faznoi mezhpishchevaritel'noi aktivnosti podzheludochnoi zhelezy i glavnogo pankreaticheskogo protoka u zdorovykh i bol'nykh khronicheskim pankreatitom.

Sixteen healthy subjects and 113 patients with chronic pancreatitis were studied for ultrasonic dynamics of phase interdigestive activity of pancreas and calibre of the main pancreatic duct (MPD). Both in healthy individuals and patients, the gland sizes and MPD calibre change with phases of interdigestive motility of duodenum. The largest sizes in healthy subjects are found in phase 2 irregular contractions of duodenum, the least ones--in patients with grave disease course. This is an important differential and diagnostic criterion between chronic pancreatitis and normal functional state of pancreas corresponding to a certain phase of interdigestive motility of duodenum. Phase-dependent sizes of pancreas and MPD calibre are to be taken into account in conducting ultrasonography of pancreas and interpretation of the results obtained.

[Biosynthesis of nactinic compounds by population variants of macrotetrolide-producing streptomycetes]. / Biosintez naktinovykh soedinenii populiatsionnymi variantami streptomitsetov--produtsentov makrotetrolidov.

Strains of Streptomyces chrysomallus subsp. macrotetrolidi and soil isolates of Streptomyces spp. producing ammonium specific agents were studied and correlation between the synthesis of nactinic acids and their oligomers and the hydrophobic nature of the active variant in the streptomycete population was shown.