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Development of functional antimicrobial papers using chitosan/starch-silver nanoparticles
Jung, Jeyoung,Kasi, Gopinath,Seo, Jongchul Elsevier 2018 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES Vol.112 No.-
<P><B>Abstract</B></P> <P>In the present work, we report the synthesis of chitosan:starch‑silver nanoparticle (Cht:St-AgNPs) coated papers for antimicrobial packaging applications. The starch-assisted synthesized St-AgNPs are spherical in shape with an average particle size of 7 nm. Chitosan was mixed into the synthesized St-AgNPs solution with different ratios of 9:1, 8:2, 7:3, and 5:5 by weight. Further, the influence of different ratios of Cht:St-AgNPs on the various paper properties such as mechanical properties, water and oil resistance, and antimicrobial activities was investigated. It was observed that the properties of the coated papers were strongly dependent on the composition of Cht:St-AgNPs. The Cht:St-AgNPs-coated paper prepared with the ratio of 9:1 showed excellent mechanical properties and good resistance properties against water and oil. The Cht:St-AgNPs coated papers showed a remarkable enhancement in mechanical strength, oil and water resistance, and antibacterial and antifungal activity, which can make them a potential candidate for functional antimicrobial packaging applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Starch-assisted silver nanoparticles (St-AgNPs) was synthesized via successfully ultrasonication method. </LI> <LI> St-AgNPs solution was mixed with chitosan at the different ratios. </LI> <LI> Different ratios of chitosan and St-AgNPs solutions were coated on cellulose papers. </LI> <LI> Cht:St-AgNPs(9:1) coated paper exhibited excellent mechanical properties, water/oil resistance, and antimicrobial activity. </LI> </UL> </P>
Thamilarasan Vijayan,Arumugam Jayamani,Mani Pugazhenthi,Azam Nasirian,Jinheung Kim,Gopinath Kasi 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.11
Tridentate NNO donor Schiff base ligand and its mixed ligand zinc(II) complexwere synthesized stoichiometrically and characterized by electronic, infrared,mass spectral techniques and elemental analysis. To understand the DNA bindingability, the complex was investigated by various analytical and spectroscopictechniques in presence of calf thymus DNA (CT-DNA). The bindingstudies showed that the zinc complex interacts with DNA by groove bindingmode with intrinsic binding strength of 2.11 105 M1 and with bovine serumalbumin the complex showed dynamic quenching attributed for changes inthe secondary structure of BSA with efficient interaction. The MCF-7 cell linestudies of the zinc(II) complex with 90.8 μM IC50 value revealed that the complexis effective for the breast cancer cell line and has a potential as anticancerdrug. Furthermore, the tridentate ligand and its mixed ligand zinc complexwere screened for antibacterial and antifungal activities, which showed betterantimicrobial activity for complex.