title: Development of active biofilms of quinoa (Chenopodium quinoa W.) starch containing gold nanoparticles and evaluation of antimicrobial activity.
abstract: Active biofilms of quinoa (Chenopodium quinoa, W.) starch were prepared by incorporating gold nanoparticles stabilised by an ionic silsesquioxane that contains the 1,4-diazoniabicyclo[2.2.2]octane chloride group. The biofilms were characterised and their antimicrobial activity was evaluated against Escherichiacoli and Staphylococcusaureus. The presence of gold nanoparticles produces an improvement in the mechanical, optical and morphological properties, maintaining the thermal and barrier properties unchanged when compared to the standard biofilm. The active biofilms exhibited strong antibacterial activity against food-borne pathogens with inhibition percentages of 99% against E. coli and 98% against S. aureus. These quinoa starch biofilms containing gold nanoparticles are very promising to be used as active food packaging for the maintenance of food safety and extension of the shelf life of packaged foods.
authors.affiliation: Laboratório de Compostos Bioativos, Instituto de Ciência e Tecnologia dos Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Carlos H
authors.initials: CH
authors.lastname: Pagno
authors.affiliation: Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Tania M H
authors.initials: TM
authors.lastname: Costa
authors.affiliation: Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Eliana W
authors.initials: EW
authors.lastname: de Menezes
authors.affiliation: Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Edilson V
authors.initials: EV
authors.lastname: Benvenutti
authors.affiliation: Laboratório de Compostos Bioativos, Instituto de Ciência e Tecnologia dos Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Plinho F
authors.initials: PF
authors.lastname: Hertz
authors.affiliation: Laboratório de Compostos Bioativos, Instituto de Ciência e Tecnologia dos Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Carla R
authors.initials: CR
authors.lastname: Matte
authors.affiliation: Departamento de Engenharia de Alimentos, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Juliano V
authors.initials: JV
authors.lastname: Tosati
authors.affiliation: Departamento de Engenharia de Alimentos, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Alcilene R
authors.initials: AR
authors.lastname: Monteiro
authors.affiliation: Laboratório de Compostos Bioativos, Instituto de Ciência e Tecnologia dos Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Alessandro O
authors.initials: AO
authors.lastname: Rios
authors.affiliation: Laboratório de Compostos Bioativos, Instituto de Ciência e Tecnologia dos Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Electronic address: simone.flores@ufrgs.br.
authors.forename: Simone H
authors.initials: SH
authors.lastname: Flôres
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D018441:Biofilms / Q000187:drug effects*; D027465:Chenopodium quinoa / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects; D018857:Food Packaging; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D013211:Staphylococcus aureus / Q000187:drug effects; D013213:Starch / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D006046:Gold; D013213:Starch
keywords: Antibacterial; Food packaging; Metal nanoparticles; Nanocomposite; Quinoa starch