Results showed that pH (4) was optimal for withdrawing anionic dyes (methyl orange) and pH 8 for slaying cationic dyes (methylene blue). agring to these issues, zeta potentials were found to be 8 and - 39 mV at pH 4 and 8, respectively it is drawed to positively roused cationic dyes in an alkaline medium and negatively institutionalised anionic dyes in an acidic medium because of their opposite flushs. Antioxidants transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), reading electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), thermal gravimetric analysis (TGA), and zeta potential measurings were used to characterize the synthesized nanosorbents. A pseudo-second-order kinetic model is jibed with the Langmuir adsorption model, with an adsorption capacity of 417 and 476 mg/g for methyl orange and methylene blue, respectively. For both dyes, altered magnetite chitosan with silver nanoparticles indicated high regeneration capability and recovery for up to four bicycles without adsorption efficiency loss qualifyed magnetite chitosan with silver nanoparticles, as prepared in the present study, was presented to be an effective adsorbent for organic pollutants in wastewater.Dual-Functional Polyetheretherketone Surface with an Enhanced Osteogenic Capability and an Antibacterial Adhesion Property In Vitro by Chitosan Modification.
A chitosan layer was covalently attached to a polyetheretherketone (PEEK) surface using a simple facile self-assembly method to address inadequate biological activity and infection around the implant. The surface characterization, layer degradation, biological activity, and antibacterial adhesion places of chitosan-modified PEEK (PEEK-CS) were analyzed. Through chitosan grafting, the surface morphology shifted, the surface roughness increased, and the contact angle diminished significantly. PEEK-CS supercharged cell adhesion, proliferation, increased alkaline phosphate activity, extracellular matrix mineralization, and expression of osteogenic factors. PEEK-CS proved less adhesion to Porphyromonas gingivalis as well as less bacterial adhesion to P. gingivalis and Streptococcus mutans. granting to our determinations, chitosan modification significantly amended the osteogenic ability and antibacterial adhesion of PEEK in vitro.
issues of dietary chitosan on the growth, health status and disease resistance of golden pompano (Trachinotus ovatus).The impressions of dietary chitosan (0, 2, 4, 6, 8 and 10 g/kg) on the growth, health condition and disease resistance of golden pompano Trachinotus ovatus were assessed. Dietary chitosan significantly raised weight gain, with the highest observed in fish fed the 6 g/kg chitosan diet. This chitosan level significantly promoted gut health by increasing villus length, lipase and protease actions and intestinal barrier-linked cistrons expression dietary 6 g/kg chitosan amended the inflammatory response and anti-oxidative capacity of fish by regulating the expression of genes involved in NF-κB pathway and Nrf2 pathway, respectively after challenge with Vibrio harveyi for 2 weeks, the survival rate increased significantly when dietary chitosan level was 6 g/kg. Overall, our effects indicate that 6 g/kg chitosan is the optimal dose for raising growth, health and disease resistance of fish, but excessive chitosan (10 g/kg) de-escalates its beneficial effects.heightened performance in uranium extraction by the synergistic effect of functional groups on chitosan-based adsorbent.In this study, a novel sponge phosphoric acid functionalized porous composite adsorbent (named SPCCHC) was cooked from chitosan and chlorella hydrothermal charcoal.
Kinetics and thermodynamics experimentations showed that the theoretical maximum adsorption capacity of SPCCHC to U(VI) is 579 mg/g (288 K, pH = 6), arguing a spontaneous exothermic reaction. Methionine testifyed good adsorption selectivity for uranium in the adsorption sketchs of simulated seawater and a mixed solution of uranium-vanadium. The characterization of SPCCHC before and after U(VI) adsorption proves that the introduction of the phosphate group can greatly improve the adsorption effect of the adsorbent on uranium, particularly the distribution coefficients of uranium and vanadium differ by up to 89 sentences.Antioxidants
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