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Exploring the potential of Rhamnolipid on controlling food pathogens: effect of ionic strength and biopolymers

Grant number: 19/14405-9
Support Opportunities:Regular Research Grants
Duration: September 01, 2019 - November 30, 2021
Field of knowledge:Agronomical Sciences - Food Science and Technology - Food Science
Principal Investigator:Marcia Nitschke
Grantee:Marcia Nitschke
Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The use of natural and environmental-friendly antimicrobials represent a trend in the food industry. The rhamnolipids, microbial-derived surfactants, have shown potential as agents to control the growth of food pathogens additionally; they have gained the status of ´green surfactants'. Chitosan is a biopolymer of recognized antimicrobial activity, which is soluble under acidic conditions. A recent study of our research group demonstrated that the rhamnolipids are more effective in the control of Gram-positive pathogens when in acidic conditions; thus, the combination of rhamnolipids and chitosan could be advantageous since many foods have pH in the acid range. In addition to pH, we observed that the combination of RL with salts, such as sodium chloride, increases antimicrobial action however, the mechanism involved in such interaction has not been studied. This project aims to evaluate the antimicrobial potential of nanoparticles formulated by combining RL and Chitosan against planktonic and biofilms of food pathogenic bacteria. At the same time, we intend to study the interaction RL-salt and its relationship with antimicrobial activity. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NITSCHKE, MARCIA; MARANGON, CRISIANE APARECIDA. Microbial surfactants in nanotechnology: recent trends and applications. CRITICAL REVIEWS IN BIOTECHNOLOGY, . (19/14405-9)
BERTUSO, PAULA DE CAMARGO; MARANGON, CRISIANE APARECIDA; NITSCHKE, MARCIA. Susceptibility of Vegetative Cells and Endospores of Bacillus cereus to Rhamnolipid Biosurfactants and Their Potential Application in Dairy. MICROORGANISMS, v. 10, n. 9, p. 17-pg., . (19/14405-9, 19/22799-7, 21/09935-9, 18/22214-6)
BERTUSO, PAULA DE CAMARGO; DRAPPE MAYER, DEBORA M.; NITSCHKE, MARCIA. Combining Celery Oleoresin, Limonene and Rhamnolipid as New Strategy to Control Endospore-Forming Bacillus cereus. FOODS, v. 10, n. 2, . (19/14405-9)
MARANGON, CRISIANE A.; VIGILATO RODRIGUES, MURILO A.; VICENTE BERTOLO, MIRELLA R.; AMARO MARTINS, VIRGINIA DA C.; DE GUZZI PLEPIS, ANA MARIA; NITSCHKE, MARCIA. The effects of ionic strength and pH on antibacterial activity of hybrid biosurfactant-biopolymer nanoparticles. Journal of Applied Polymer Science, v. 139, n. 1, . (19/14405-9, 19/18748-8)
NITSCHKE, MARCIA; MARANGON, CRISIANE APARECIDA. icrobial surfactants in nanotechnology: recent trends and application. CRITICAL REVIEWS IN BIOTECHNOLOGY, v. 42, n. 2, p. 294-310, . (19/14405-9)

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