Cerebral structural alterations in the patients undergoing postherpetic neuralgia: A VBM-MRI study.

This study aimed to investigate the changes in gray matter (GM) volume and density in patients with postherpetic neuralgia (PHN). Using voxel-based morphometry (VBM), the differences in cerebral GM volume and concentration between 25 PHN patients and 25 healthy controls with similar gender ratios, ages, and education were compared. Meanwhile, correlation analysis was performed between the value of GM volume/concentration in the brain areas with discrepancy and the visual analog scale (VAS) score/lesion duration.

Early Intervention of Gastrodin Improved Motor Learning in Diabetic Rats Through Ameliorating Vascular Dysfunction.

The mechanism of cognitive dysfunction in diabetes is still unclear. Recently, studies have shown that the cerebellum is involved in cognition. Furthermore, diabetes-induced cerebellar alterations is related to vascular changes.

Production of 6-aminopenicillanic acid in aqueous two-phase systems by recombinant Escherichia coli with intracellular penicillin acylase.

Bioconversion of penicillin G in PEG 20000/dextran T 70 aqueous two-phase systems was achieved using the recombinant Escherichia coli A56 (ppA22) with an intracellular penicillin acylase as catalyst. The best conversion conditions were attained for: 7% (w/v) substrate (penicillin G), enzyme activity in bottom phase 52 U ml(-1), pH 7.8, temperature 37 degrees C, reaction time 40 min.

Affinity Chromatography of Urokinase Using Cefazoline as a Ligand.

Sepharose 4B-based affinity adsorbent was prepared using cefazoline as a ligand, and epichlorohydrin as an activator. The density of the ligand in the affinity adsorbents was about 43 &mgr;mol/g wet gel. The optimal adsorption pH for urokinase was 6.