ABSTRACT
Si(100)4 x 3-In reconstruction is essentially a superlattice of magic (identical-size) Si7In6 nanoclusters. Using scanning tunneling microscopy (STM) observations, we have found that under appropriate growth conditions up to 35% of these clusters can be modified; namely, two Si atoms in the cluster can be replaced by two In atoms, thus forming a Si5In8 cluster. This modification can be considered as a doping of the magic cluster, as it changes the electronic properties of the cluster from semiconducting towards metallic. The doped cluster is less rigid than the ordinary one and swings in the electrical field of the STM tip. The atomic structure and stability of the doped magic cluster have been examined using first-principles total-energy calculations.
ABSTRACT
AIM: To determine features of duodenal ulcer (DU) course as regards personality traits and to validate a differentiated approach to psychopharmacological correction of such patients. MATERIAL AND METHODS: The personality type was determined in 102 DU patients using an experimental psychological examination. RESULTS: Among the examinees, submissive and excitable personalities predominated (56.9 vs 43.1%, respectively). Submissive personalities were anxiously accentuated, moderately psychically rigid and moderately neurotic. Morphologically, they had diffuse fundal and antral gastritis with moderate H. pylori dissemination, intact acid production, ulcer size > 1 cm. Excitable personalities had antral gastritis with moderate H. pylori dissemination, high acid production, ulcer defect 0.6-0.9 cm. CONCLUSION: Anti-acid and eradication therapy in combination with individual psychotropic therapy (amitriptilin in submissive and nozepam in excitable personalities) reduced the time of DU healing and prevent recurrence for one year.
Subject(s)
Duodenal Ulcer/psychology , Personality Disorders/drug therapy , Psychotropic Drugs/therapeutic use , Adult , Duodenal Ulcer/physiopathology , Female , Humans , MaleABSTRACT
The authors present the first clinical experience gained in anesthesia and intensive care during 8 orthotopic transplantations of the liver in 4 male and 4 female patients aged 24-50 years. Veno-venous bypass for general anesthesia is described. hemodynamic, oxygen balance, metabolic and blood clotting parameters during anesthesia and surgery are analyzed. Drastic changes were noted during the liver-free phase: oxygen delivery and consumption decreased almost twofold, a metabolic acidosis was observed before and, more so, during this phase.
