Investigation of non-linear acoustic losses at the open end of a tube.

At high acoustic level, non-linear losses at the end of a tube are usually interpreted as the consequence of a jet formation at the tube end resulting in annular vortices dissipating part of the acoustic energy. Previous work has shown that two different regimes may occur. The present work, using particle image velocimetry visualization, lattice Boltzmann method simulation in 2D, and an analytical model, shows that the two different regimes correspond to situations for which the annular vortices remain attached to the tube (low acoustic particle velocity) or detached (high acoustic particle velocity).

[The effect of diabetes and cholelithiasis on the course and consequences of acute viral hepatitis type B]. / Wplyw cukrzycy i kamicy zólciowej na przebieg i nastepstwa ostrego wirusowego zapalenia watroby typu B.

Course and consequences of acute hepatitis B on the group of 40 patients with diabetes mellitus and 21 patients with cholelithiasis were estimated with respect to the group has consisted of 82 person with acute hepatitis B without coexisting disorders. Hospitalization time has been longer on the group with diabetes mellitus or cholelithiasis and activity of serum alanine aminotransferase (AlAT) has brought back to normal longer than on the control group. Maximal activity of serum AlAT has been higher on the control group and maximal bilirubin concentration in serum the patients with diabetes mellitus or cholelithiasis has not differed from the control group. Acute hepatitis B passed into chronic hepatitis or cirrhosis of the liver on the group with diabetes mellitus or cholelithiasis frequently, has been observed.

[The influence of ursodeoxycholic acid on some biochemical, immunologic and histopathologic parameters in patients with primary biliary cirrhosis]. / Wplyw kwasu ursodezoksycholowego na niektóre parametry biochemiczne, immunologiczne oraz obraz histopatologiczny u chorych z pierwotna zólciowa marskoscia watroby.

UNLABELLED: Primary biliary cirrhosis (PBC) is a chronic, inflammatory disease, which affects the small and medium size bile ducts and is characterized by chronic cholestasis. Ursodeoxycholic acid (UDCA), that had earlier been used in treatment of cholesterol cholelithiasis, was introduced to pharmacotherapy of PBC 10 years ago. Our study was carried out in 30 patients, who were suffering from PBC and were treated at Department of Gastroenterology, Collegium Medicum, Jagiellonian University in Cracow. Beside the routine biochemical and enzymatic tests all patients had the level of immunoglobulin checked and selected ones acute phase protein. The percutaneous liver biopsy was carried out in each case; the morphological changes were classified according to Ludwig scale. All above tests were carried out before implementing UDCA as well as after one year from the beginning of the treatment. The group of patients is still closely monitored. CONCLUSIONS: 1. By using the UDCA in treatment of PBC biochemical parameters of cholestasis improved, also in some cases the inflammatory reaction decreased; 2. UDCA used in monotherapy had no influence on the process of fibrosis.