Résumé
Chitosan has natural abundance, unique bioactivity and attractive physicochemical properties. Recent years, the synthesis of chitosan-based metal nanomaterials has attracted increasing attention. The synthesis of metal nanoparticles utilizing biomolecular or organism offers a mild medium, and thus a greater degree of control over the nanoparticles produced, along with higher reproducibility. In particular, preparation of metal nanoparticles based on biomolecular or organism has its unique facility in integrating "minimum feature sizes" into labile biological components to an excellent synergy and bifunctional effect and consequently a more broad application. Herein, we review the new development of chitosan, chitosan-based synthesis of metal nanomaterials, and their application.
Sujets)
Catalyse , Chitosane , Chimie , Nanoparticules métalliques , Chimie , OxydoréductionRésumé
Objective: To observe effects of Ganzhikang Capsule on ultrastructures in non-alcoholic fatty liver model rats so as to provide morphological basis for clinical treatment. Methods: Fatty liver model rats were induced by high fat diet, and the effects of Ganzhikang Capsule on microstructures in liver tissue were investigated with Dong Bao Gan Tai used as control medicine. Results: In the model group, serious fatty degeneration of hepatocytes with inflammatory infiltration, degeneration and necrosis, and deforming, swelling of mitochondrion, dilatation of endoplasmic reticulum were found. After treatment of Ganzhikang Capsule, microstructures of hepatocytes restored obviously, fatty degeneration relieved significantly, and Ganzhikang Capsule was superior to Dong Bao Gan Tai in restoration of fatty degeneration (P