Albumin receptors on HBsAG particles and subsequent sero-conversion designate HBeAG-positive patients among chronic active liver disease patients.
An enzyme-linked immunosorbent assay (ELISA) for the purpose of detecting the albumin receptor on hepatitis B virus surface antigen (HBsAg) particles was developed. Patient sera with moderate to high receptor values demonstrated significant correlations with serum DNA-polymerase activity (p less than 0.005), but not with HBeAg titer. Within one year of the study of 47 HBeAg-positive patients, only in the group of 12 patients with the moderately high values and 9 with low values, did 2 (16.7%) and 6 cases (66.7%) sero-convert, respectively. These results suggest that the albumin receptor might be a useful marker of HBsAg-positive patients.
Abstract CW-pumped Nd:YVO 4 lasers passively Q-switched with LiF : F 2 - and YAG:Cr 4+ saturable absorbers are modeled and comparatively analyzed. The model takes into account the geometric factor representing the distributions of the orientations of F 2 - color centers and Cr 4+ ions relatively to the corresponding crystalline hosts on the output parameters of the lasers. It is shown that the LiF : F 2 - Q-switch has evident advantages over the YAG:Cr 4+ one in the senses of a much more expanded range of pump powers where the giant-pulse regime is supported in the laser and, as a consequence, potentially higher average output and peak pulse powers accessible.