Catechol Modification Of Non-Woven Chitosan Gauze For Heightened Hemostatic Efficacy

Development of efficient hemostatic gauze is critical to increasing survival rate by quick bleeding control of life-jeopardizing 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 evaluated.  Seebio aloe emodin structure  chitosan-catechol gauze attests impressive hemostatic operations on rat femoral artery and liver laceration injury mannequins (blood loss of this qualifyed chitosan gauze is less than 17% of that of pristine chitosan gauze). Additionally, it is biodegradable, and observes non-cytotoxicity.

Aloe emodin  incorporates three structure and function forces together, i.e., anchoring effect between catechol and tissue, blood repelling effect from hydrophobic alkyl chain, and blood wicking effect from hydrophilic chitosan a new hemostatic mechanism is advised for the excellent hemostatic potentials of this chitosan gauze.Selective removal of Au(III) from wastewater by pyridine-altered chitosan.A pyridine-altered chitosan (PMCS) adsorbent with excellent adsorption performance and specific selectivity for Au(III) in wastewater was prepared. FTIR, SEM, XPS and XRD were used to study its adsorption performance, and various exemplars 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).

The data analysis results prove that the PSO and Langmuir modelings best describe the adsorption process. Adsorption experimentations in the presence of multiple ions testifyed that PMCS is selective for the adsorption of Au(III). The adsorption and desorption experimentations depicted that the adsorption rate of PMCS could still reach 94% after three cycles. In summary, PMCS was demonstrated 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 considered to be haved of photoactivity to generate reactive oxygen species (ROS) under ultraviolet (UV) light, which is retrieved to be a favorable antibacterial candidate RF was contained into chitosan (CS) finishings and addressed under UV with different exposure times (2, 4, and 6 h) to improve the physicochemical and antibacterial properties. The solutions showed that the light transmittance and antibacterial performance of chitosan finishings 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 accomplished 1549 and 95 μg/g, respectively, after 6 h irradiation the chitosan coverings with UV irradiation also concentrated the pH value, total volatile basic nitrogen (TVB-N), ΔE, and total viable enumerations (TVC) and amended sensory attributes of pork. In conclusion, the UV enlightened chitosan finishs 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.raised Antimicrobial Cellulose/Chitosan/ZnO Biodegradable Composite Membrane.In this study, chitosan and sugarcane cellulose were used as film-moulding materials, while the inorganic agent zinc oxide (ZnO) and natural compound phenyllactic acid (PA) were used as the main bacteriostatic constituents to fabricate biodegradable antimicrobial composite membranes. The water absorption and antimicrobial holdings were investigated by aligning the concentration of PA. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) results exhibited that the portions of the composite membrane were successfully mixed.