title: Changes in the microbiological and chemical characteristics of white bread during storage in paper packages modified with Ag/TiO2-SiO2, Ag/N-TiO2 or Au/TiO2.
abstract: Microbiological and chemical characteristics of white bread during storage in paper-packages modified with Ag/TiO2-SiO2, Ag/N-TiO2 or Au/TiO2 were investigated. The whiteness and the water retention of the modified packages were slightly superior to those exhibited by the reference sample, as the color of the composite was lighter. The water retention was very good especially for the Ag/TiO2-SiO2-paper. These improvements can be associated with the high specific surface area and with the low agglomeration tendency of Ag nanoparticles in comparison with the Au ones. The preservation activity of the composites for the bread storage is positively influenced by photoactivity and presence of nano-Ag. Packages Ag/TiO2-SiO2-paper and Ag/N-TiO2-paper can find their applicability for extending the shelf life of bread by 2 days as compared with the unmodified paper-package. No influence of the Au/TiO2 on the extending the shelf life of bread was observed.
authors.affiliation: Technical University Cluj Napoca, North University Center of Baia Mare, Department of Chemistry and Biology, Victor Babes 76, 430083 Baia Mare, Romania. Electronic address: peteranca@yahoo.com.
authors.forename: Anca
authors.initials: A
authors.lastname: Peter
authors.affiliation: Technical University Cluj Napoca, North University Center of Baia Mare, Department of Chemistry and Biology, Victor Babes 76, 430083 Baia Mare, Romania. Electronic address: mihalyl@yahoo.com.
authors.forename: Leonard
authors.initials: L
authors.lastname: Mihaly-Cozmuta
authors.affiliation: Technical University Cluj Napoca, North University Center of Baia Mare, Department of Chemistry and Biology, Victor Babes 76, 430083 Baia Mare, Romania. Electronic address: ancamihalycozmuta@yahoo.com.
authors.forename: Anca
authors.initials: A
authors.lastname: Mihaly-Cozmuta
authors.affiliation: Technical University Cluj Napoca, North University Center of Baia Mare, Department of Chemistry and Biology, Victor Babes 76, 430083 Baia Mare, Romania. Electronic address: vargacamelia@yahoo.com.
authors.forename: Camelia
authors.initials: C
authors.lastname: Nicula
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. Electronic address: ziemk@ch.pw.edu.pl.
authors.forename: Wanda
authors.initials: W
authors.lastname: Ziemkowska
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. Electronic address: dbasiak@ch.pw.edu.pl.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Basiak
authors.affiliation: Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, A. Janos 11, 400028 Cluj Napoca, Romania. Electronic address: vdanciu@chem.ubbcluj.ro.
authors.forename: Virginia
authors.initials: V
authors.lastname: Danciu
authors.affiliation: Babes-Bolyai University, Faculty of Physics & Institute for Interdisciplinary Research on Bio-Nano-Sciences, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania. Electronic address: adriana.vulpoi@phys.ubbcluj.ro.
authors.forename: Adriana
authors.initials: A
authors.lastname: Vulpoi
authors.affiliation: Babes-Bolyai University, Faculty of Physics & Institute for Interdisciplinary Research on Bio-Nano-Sciences, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania. Electronic address: lucian.baia@phys.ubbcluj.ro.
authors.forename: Lucian
authors.initials: L
authors.lastname: Baia
authors.affiliation: L&G Consulting, Stefan cel Mare 1, Dej, Romania. Electronic address: mamihai@yahoo.com.
authors.forename: Anca
authors.initials: A
authors.lastname: Falup
authors.affiliation: L&G Consulting, Stefan cel Mare 1, Dej, Romania. Electronic address: craciun.grigore@yahoo.com.
authors.forename: Grigore
authors.initials: G
authors.lastname: Craciun
authors.affiliation: ICA Research & Development SRL, Bucharest, 202 Splaiul Independentei, 4th floor, Bucharest, Romania. Electronic address: alexcrc@yahoo.com.
authors.forename: Alexandru
authors.initials: A
authors.lastname: Ciric
authors.affiliation: ICA Research & Development SRL, Bucharest, 202 Splaiul Independentei, 4th floor, Bucharest, Romania. Electronic address: ela_begea@yahoo.com.
authors.forename: Mihaela
authors.initials: M
authors.lastname: Begea
authors.affiliation: ICA Research & Development SRL, Bucharest, 202 Splaiul Independentei, 4th floor, Bucharest, Romania. Electronic address: c.kiss@ica-rd.ro.
authors.forename: Claudia
authors.initials: C
authors.lastname: Kiss
authors.affiliation: ICA Research & Development SRL, Bucharest, 202 Splaiul Independentei, 4th floor, Bucharest, Romania. Electronic address: d.vatuiu@ica-rd.ro.
authors.forename: Daniela
authors.initials: D
authors.lastname: Vatuiu
mesh_terms: D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D001939:Bread / Q000032:analysis* / Q000382:microbiology; D005506:Food Contamination / Q000032:analysis / Q000517:prevention & control; D018857:Food Packaging / Q000295:instrumentation*; D005519:Food Preservation / Q000295:instrumentation / Q000379:methods*; D061353:Food Storage; D053758:Nanoparticles / Q000737:chemistry; D010209:Paper; D012822:Silicon Dioxide / Q000494:pharmacology*; D012834:Silver / Q000494:pharmacology*; D014025:Titanium / Q000494:pharmacology*
chemical_list: C507641:TiO2-SiO2; D012834:Silver; D012822:Silicon Dioxide; D014025:Titanium
keywords: Ag/N–TiO(2) or Au/TiO(2) composites; Chemical, microbiological and nutritional tests; Paper package characteristics; Paper package modified with Ag/TiO(2)–SiO(2); White bread