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This study enquired the feasibility of using graphene oxide/chitosan ( GO/CS ) bums as an adsorbent for the remotion of iodine-131 from aqueous results . The adsorption efficiency was enquired using iodine-131 radioisotopes to support the results in conjunction with static isotopes . The results divulged that the synthetical structure comprises of randomly connected GO canvas without overlapping layers . The equilibrium adsorption data fitted well with the Langmuir framework . The separation gene ( R ( L ) ) value was in the range of 0-1 , confirming the lucky intake of the iodide on the GO/CS poriferan . The maximum adsorption capacity of iodine-131 by GO/CS poriferans was 0 MBq/mg .
The high-pitched remotion efficiency was 92 % at pH 7 ± 0 . Due to its attractive features , including its low cost , the ease of holding it , and its eco-friendly properties , the developed GO/CS sponge could be used as an alternative adsorbent for removing radioiodine from wastewater.Immobilization of Candida rugosa lipase on magnetized chitosan beadworks and application in flavor esters synthesis.In this work , magnetic chitosan ( MCH ) drops were synthesized by phase-inversion method , and ingrafted with polydopamine ( PDA ) and then used for direct immobilization of Candida rugosa lipase by Schiff base reaction . The amount of immobilized enzyme and the maintained activity were found to be 47 mg/g and 72 % , respectively , at pH 7 , and at 25 °C . The apparent Km ( 9 mmol/L ) , and Vmax ( 384 U/mg ) values of the immobilized lipase were importantly altered equated to the free lipase . The MCH @ PDA-lipase was better thermal and storage stability at unlike temperatures than those of the free lipase .
In hexane metier , the esterification reaction results showed that the maximal conversions of isoamylalcohol and isopentyl inebriant to isoamyl acetate and isopentyl ethanoate using the MCH @ PDA-lipase were witnessed to be 98 ± 1 % and 73 ± 0 % , severally . These solvents shewed that the MCH @ PDA-lipase can be used as an surgical immobilised enzyme organisation for many biotechnological applications.Physicochemical aspects of excogitation of ultrathin movies free-based on chitosan , pectin , and their flatware nanocomposites with antiadhesive and bactericidal potential.Implant-related contagion is one of the serious problems in regenerative music . foretelling approach to overcome the troubles doed by bacterial development on the aesculapian implants is their modification by bioactive finishings . A versatile technique for designing multilayer films with trim features at the micromillimeter scale is layer-by-layer assemblage . In this study , multilayer cinemas established on biopolymers ( pectin and chitosan ) and their nanocomposites with silver nanoparticles have been prepared and evaluated .
The buildup of multilayers was monitored using the quartz crystal microbalance with wastefulness technique . The geomorphology of the obtained pictures was inquired by nuclear force microscopy . We have showed that pectin-Ag-containing films were characterised by the elongate emergence and smooth defect-free airfoil . When pectin-Ag was interchanged for the pectin in the multilayer organizations , the properties of the formed coatings were significantly changed : the film rigidity and aerofoil roughness increased , as well as the film growing acquired the parabolical persona . All prepared multilayer films have exhibited antibacterial action against gram-positive ( staphylococci aureus ) and gram-negative ( Escherichia coli ) bacteria . The meaning diminution in the number of the cleaved E. coli on the multilayer surface has been finded ; moreover , many of the cells were misshapen with cytol leaking .
The fain multilayer flicks presented a mild action against S. aureus preponderantly due to the antiadhesive essence . Our answers suggest that antibacterial action of biopolymer multilayers is determined by the film composition and physicochemical characteristics and can be linked with their antiadhesive and disinfectant behaviors.Oregano and Thyme Essential Oils Encapsulated in Chitosan Nanoparticles as Effective Antimicrobial agent against Foodborne Pathogens.The use of natural compounds with biocidal activity to press the maturation of bacteria creditworthy for foodborne illness is one of the main research challenges in the food sphere .DEHYDROMUCIC ACID
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