Synthesis of silver nanoparticles prepared with a dextran-type exopolysaccharide fromWeissella cibariaMED17 with antimicrobial functions


Ispirli H., SAĞDIÇ O. , DERTLİ E.

PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY, 2020 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2020
  • Doi Number: 10.1080/10826068.2020.1795673
  • Title of Journal : PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
  • Keywords: Antibacterial, antifungal, dextran, silver nanoparticles, GREEN SYNTHESIS, ANTIBACTERIAL ACTIVITY, EXTRACT, CHITOSAN

Abstract

Microbial polysaccharides can find distinct applications as stabilizer agents including synthesis of nanoparticles. In this study, a dextran-type exopolysaccharide (EPS) was used as the stabilizer agent for the green synthesis of silver nanoparticles (AgNPs-Dex) with antimicrobial characteristics. UV-vis spectroscopy analysis was used to test the formation of AgNPs-Dex. The uniform morphology at around 10 nm size was observed for AgNPs-Dex by TEM analysis and importantly EDX analysis demonstrated the embedment of Ag(+)ions within dextran as the stabilizer agent. XRD analysis confirmed the crystalline nature of AgNPs-Dex and FTIR analysis demonstrated the interactions of dextran functional groups with silver. DSC and TGA analysis showed the alteration in the thermal stability of AgNPs-Dex compared to the stabilizer dextran. The antibacterial and antifungal activities of AgNPs-Dex were determined against food originated pathogenic bacteria and fungi and important inhibition levels were observed at 1 mg ml(-1)concentration of AgNPs-Dex and this activity was observed to be concentration dependent.