Various mo]ccules may tLct as an ttcceptor. but lcvans, hexoses and water are highly rcactive. Most studies on ]evansucrases havc been done in Ba('iUus subtilis. Chambert c,t ai,"'2i have invcstigated the mechanism of the transfructosylation proccss. Petit-Glatron et al.]) have characterized a mucromo]ecular inactive form of leN,ansucrase. LcBrun et aL4} prescnted the tcrtiary structure or the ...

Pseudomonas aeruginosa strains isolated from cystic fibrosis patients were tested for production of exoenzymes, sensitivity to pooled normal human serum, and colony morphology. Strains isolated from patients exhibiting a severe form of the disease were seen to produce a decreased range of exoenzymes, to show an increase in their serum sensitivity, and to be predominantly mucoid in colonial char...

To assess environmental risks related to the mobility and toxicity of AgNPs, chemical availability AgNPs polyvinylpyrrolidone-coated (PVP-AgNPs) in three agricultural soils was quantified a pot experiment. Porewater collection soil extractions with 0.01 M CaCl2, 0.4 Glycine (pH 1.5) 0.05 NH4-EDTA were performed. The effect on exoenzyme activities also assessed. concentration low (<0.4% <0...