Catechol Modification Of Non-Woven Chitosan Gauze For Raised Hemostatic Efficacy
Development of efficient hemostatic gauze is critical to increasing survival rate by quick bleeding control of life-threatening hemorrhage a novel chitosan non-woven hemostatic gauze is made by slightly surface modification with a special catechol compound, i.e. 3-(9,11,13-pentadecatrienyl)-1,2-benzenediol with a long side hydrophobic alkyl chain. Its wettability, interaction with red blood cell and platelet, and hemostatic efficacy on rat harms are assessed. chitosan benefits chitosan-catechol gauze attests impressive hemostatic performances on rat femoral artery and liver laceration injury exemplars (blood loss of this modified chitosan gauze is less than 17% of that of pristine chitosan gauze). Additionally, it is biodegradable, and conserves non-cytotoxicity.
It desegregates three structure and function results together, i.e., grinding effect between catechol and tissue, blood disgusting effect from hydrophobic alkyl chain, and blood wicking effect from hydrophilic chitosan a new hemostatic mechanism is advised for the excellent hemostatic voltages of this chitosan gauze.Selective removal of Au(III) from wastewater by pyridine-changed chitosan.A pyridine-modified chitosan (PMCS) adsorbent with excellent adsorption performance and specific selectivity for Au(III) in wastewater was fixed. FTIR, SEM, XPS and XRD were used to study its adsorption performance, and various mannikins were used to fit and analyze the experimental adsorption data. The maximum adsorption capacity of PMCS for Au(III) is 549 mg/g (298 K, pH = 4).
chitosan supplement benefits prove that the PSO and Langmuir models best describe the adsorption process. Adsorption experimentations in the presence of multiple ions examined that PMCS is selective for the adsorption of Au(III). The adsorption and desorption experiments pointed that the adsorption rate of PMCS could still reach 94% after three cycles. In summary, PMCS was shewed to be a high-quality material for the adsorption of Au(III) from wastewater due to its excellent adsorption performance, specific selectivity and reusability.Photodynamic Effect of Riboflavin on Chitosan Coatings and the Application in Pork Preservation.Riboflavin (RF) was counted to be owned of photoactivity to generate reactive oxygen species (ROS) under ultraviolet (UV) light, which is cogitated to be a favorable antibacterial candidate RF was incorporated into chitosan (CS) applications and processed under UV with different exposure meters (2, 4, and 6 h) to improve the physicochemical and antibacterial holdings. The terminations shewed that the light transmittance and antibacterial performance of chitosan coverings gradually increased with the extension of the UV irradiation time.
The antibacterial ability of chitosan finishings correlated with the generation of ROS: ∙OH and H(2)O(2), which reached 1549 and 95 μg/g, respectively, after 6 h irradiation the chitosan coatings with UV irradiation also slimed the pH value, total volatile basic nitrogen (TVB-N), ΔE, and total viable enumerations (TVC) and meliorated sensory attributes of pork. In conclusion, the UV rayed chitosan coatings could be used as an environmentally friendly antimicrobial packaging material to effectively delay the spoilage of pork, maintain its sensory quality and prolong its shelf life.Enhanced Antimicrobial Cellulose/Chitosan/ZnO Biodegradable Composite Membrane.In this study, chitosan and sugarcane cellulose were used as film-working cloths, while the inorganic agent zinc oxide (ZnO) and natural compound phenyllactic acid (PA) were used as the main bacteriostatic portions to fabricate biodegradable antimicrobial composite membranes. The water absorption and antimicrobial places were inquired by conforming the concentration of PA. The reading electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) consequences demoed that the parts of the composite membrane were successfully mixed.