首页|Photodynamic inactivation of Pseudomonas fluorescens in Minas Frescal cheese using curcumin as a photosensitizer

Photodynamic inactivation of Pseudomonas fluorescens in Minas Frescal cheese using curcumin as a photosensitizer

扫码查看
原文链接
  • NSTL
  • Elsevier
The dairy industries demand innovative technologies for food preservation and elimination of psychrotrophic bacteria like the Photodynamic Inactivation of Microorganisms (PDIM) modalit, which is based on the generation of reactive oxygen species using photosensitizers. The objective was to determine in vitro the phototoxic potential of Curcumin (CUR) solubilized in different media against Pseudomonas fluorescens. In Minas Frescal cheese inoculated with Pseudomonas fluorescens, CUR acted as an antimicrobial agent and photosensitizers when incorporated in an edible and biodegradable coating. The coatings were characterized in terms of mechanical properties and permeability. The cheeses were evaluated on days 0, 3, 6, 9 and 12 by microbiological, physicalchemical and mechanical analysis. The efficiency of PDIM was influenced by solubilizers and concentrations of CUR, observing the synergistic effect of CUR with irradiation. Dimethyl sulfoxide and ethanol were the solubilizers that allowed greater CUR phototoxic activity and reduced 7 log CFU/mL of Pseudomonas fluorescens, the main spoilage bacteria in milk and dairy products. In cheeses, the photoinhibition of microorganisms was hampered by the complexity of the surface. The samples treated with CUR showed lower bacterial count and proteolysis, and consequently, greater hardness. Therefore, PDIM can be an alternative technique for use in dairy products.

Dairy productEdible coatingFood preservationPsychrotrophic bacteriaShelf life

Saraiva, Bruna Barnei、Rodrigues, Bruna Moura、da Silva Junior, Ranulfo Combuca、da Silva Scapim, Monica Regina、Lancheros, Cesar Armando Contreras、Nakamura, Celso Vataru、Caetano, Wilker、Pereira, Paulo Cesar de Souza、de Santana, Elsa Helena Walter、Pozza, Magali Soares dos Santos

展开 >

Univ Estadual Maringa, Dept Anim Sci, Colombo Ave,5790 Univ Campus, BR-87020900 Maringa, PR, Brazil

Univ Estadual Maringa, Dept Chem, Colombo Ave,5790 Univ Campus, BR-87020900 Maringa, PR, Brazil

Univ Estadual Maringa, Dept Food Engn, Colombo Ave,5790 Univ Campus, BR-87020900 Maringa, PR, Brazil

Univ Estadual Maringa, Lab Inovacao Tecnol No Desenvolvimento Farmacos &, Colombo Ave,5790 Univ Campus, BR-87020900 Maringa, PR, Brazil

Univ Pitagoras Unopar, Grad Program Sci & Technol Milk & Dairy Prod, Paris Ave,675 Piza, BR-86041100 Londrina, PR, Brazil

展开 >

2021

10.1016/j.lwt.2021.112143

LWT-Food Science & Technology

LWT-Food Science & Technology

ISSN：0023-6438
年,卷(期)：2021.151
  • 6
  • 50