Recovery and purification of chitosanase produced by Bacillus cereus using expanded bed adsorption and central composite design.

This study presents a system for expanded bed adsorption for the purification of chitosanase from broth extract in a single step. A chitosanase-producing strain was isolated and identified as Bacillus cereus C-01 and used to produce chitosanases. The expanded bed adsorption conditions for chitosanase purification were optimized statistically using STREAMLINE(TM) DEAE and a homemade column (2.

Single-step purification of chitosanases from Bacillus cereus using expanded bed chromatography.

A chitosanase-producing strain was isolated and identified as Bacillus cereus C-01. The purification and characterization of two chitosanases were studied. The purification assay was accomplished by ion exchange expanded-bed chromatography.

Perforin and granzyme B expression in oral and cutaneous lichen planus - a comparative study.

Background: Although cutaneous and oral lichen planus (LP) share similar histopathological features, oral LP often follows a recalcitrant course while LP skin lesions tend to be self-limiting. Apoptosis, mediated by cytotoxic T-cells in LP, may be triggered by the release of molecules such as perforin and granzyme B. As variation in clinical behavior can reflect differences in LP immune expression, we studied the role of those cytotoxic molecules in oral and cutaneous LP.

Perforin and granzyme B involvement in oral lesions of lichen planus and chronic GVHD.

Background: Oral lesions of lichen planus and chronic graft-vs.-host disease (cGVHD) have similar clinical and histological features, but distinct etiology. Apoptosis induced by cytotoxic T lymphocyte has been proposed as a mechanism of keratinocytes death.

Severe anemia, panserositis, and cryptogenic hepatitis in an HIV patient infected with Bartonella henselae.

Bartonella spp. constitute emerging pathogens of worldwide distribution. Bacillary angiomatosis is the most frequent skin manifestation of bartonelloses; nevertheless, B.