[Genetic analysis of the contributions of individual chromosomes to the expression of mating behavior traits in Drosophila melanogaster].

The model of isogenous strains with chromosome substitutions has been used to estimate the relative contributions of the X chromosome and autosomes (chromosomes 2 and 3) to the control of some mating behavior traits in Drosophila melanogaster. It has been found that the male sexual activity (SA), female sexual receptivity (SR), and copulation latency (CL) are determined by interaction between X-chromosome and autosomal genes, whereas the copulation duration (CD) is mainly controlled by the X-chromosome genes. The synthesized isogenous strains have been shown to be more similar to hybrids than to the original strains.

[Motor and secretion function of stomach and duodenum, duodenogastric reflux in patients with duodenal ulcer].

Gastric secretion, motor function and tonicity of the stomach and duodenum, duodenogastric reflux were studied in inpatients with two clinicopathogenetic types of duodenal ulcer: observed at young age (type 1) and in later life (type 2). The examination included pH-metry with simultaneous balloon cimography, chromogastroduodenoscopy with Kongo-red, tests for Helicobacter pylori conducted on the biopsy samples. All the patients were found to have continuous acid production.

[Duodenogastric reflux in patients with alimentary obesity].

The authors analyze findings from a comprehensive clinical and instrumental evaluation of 59 patients presenting with duodenogastric reflux. The above findings suggest that underlying the duodenogastric reflux in those patients having surplus body mass might be hypotonia of the stomach, particularly its pyloric portion. In patients with body mass that do not deviate from physiologic norms regurgitation of bile into the stomach results from the presence of duodenal dyskinesia by hypertonic type.

[The role of different investigations in diagnosis of functional disorders of the biliary system].

The paper presents the results obtained upon examination of inpatients with various types of biliary dyskinesia. The examination included: fraction chromatic duodenal intubation, stepwise manometry, cholecystography, ultrasound investigation of the liver, gall bladder, biochemical tests of the bile. Fraction duodenal intubation discovered gall bladder dysfunction.