Dynamics of evaporative cooling in magnetically trapped atomic hydrogen

We study the evaporative cooling of magnetically trapped atomic hydrogen on the basis of the kinetic theory of a Bose gas. The dynamics of trapped atoms is described by the coupled differential equations, considering both the evaporation and dipolar spin relaxation processes. The numerical time-evolution calculations quantitatively agree with the recent experiment of Bose-Einstein condensation with atomic hydrogen. It is demonstrated that the balance between evaporative cooling and heating due to dipolar relaxation limits the number of condensates to 9x10^8 and the corresponding condensate fraction to a small value of 4% as observed experimentally.Comment: 5 pages, REVTeX, 3 eps figures, Phys. Rev. A in pres

PECULIARITIES OF THE FIBROSIS AND CIRRHOSIS MONITORING AMONG CHILDREN WITH CHRONIC LIVER DISEASES

The researchers examined the opportunities to use determination in the serum among children with chronic liver diseases of various etiologies of the hyaluronic acid levels, collagen type IV, matrix metalloproteinase-2, tissue inhibitor of the matrix proteinases 1 in diagnostics of the liver fibrosis degree. They have found out that children with the given pathology show significantly growing concentrations of these compounds against marked fibrotic changes in the liver parenchyma. Hyaluronic acid, collagen type IV and matrix metalloproteinase 2 may be reliable noninvasive cirrhosis markers and used to monitor the efficiency of therapy for the chronic liver diseases among children.Key words: matrix metalloproteinase-2, tissular inhibitor of the matrix proteinases 1, liver cirrhosis, markers, diagnostics, children

PECULIARITIES OF THE FIBROSIS AND CIRRHOSIS MONITORING AMONG CHILDREN WITH CHRONIC LIVER DISEASES

The researchers examined the opportunities to use determination in the serum among children with chronic liver diseases of various etiologies of the hyaluronic acid levels, collagen type IV, matrix metalloproteinase-2, tissue inhibitor of the matrix proteinases 1 in diagnostics of the liver fibrosis degree. They have found out that children with the given pathology show significantly growing concentrations of these compounds against marked fibrotic changes in the liver parenchyma. Hyaluronic acid, collagen type IV and matrix metalloproteinase 2 may be reliable noninvasive cirrhosis markers and used to monitor the efficiency of therapy for the chronic liver diseases among children.Key words: matrix metalloproteinase-2, tissular inhibitor of the matrix proteinases 1, liver cirrhosis, markers, diagnostics, children