Effects of virgin olive oil and grape seed oil on physicochemical and antimicrobial properties of pectin-gelatin blend emulsified films.
The active emulsified blend films based on gelatin-pectin (5% w/w) containing virgin olive oil (VOO) (0.1-0.3 g/g biopolymer) and grape seed oil (GSO) (0.1-0.3 g/g biopolymer) were prepared by casting method. GSO showed slightly more decreasing effect than VOO on ultimate tensile strength (UTS) and strain at break (SAB) of blend films however; VOO had more reducing effect than GSO on the water vapor permeability (WVP). The scanning electron microscopy (SEM) images showed that incorporating 0.3 g GSO and VOO oils had not considerable effect on the morphology of the emulsified films. Atomic force microscopy (AFM) topography images indicated that adding of oils considerably could increase roughness of emulsified film. Fourier transforms infrared (FTIR) revealed that no new chemical bond formed by adding oils into biopolymer matrix. The minimum inhibitory concentration (MIC) of VOO, GSO and Savory essential oil (SEO) against four important spoilage bacteria showed that GSO had higher antibacterial effect than VOO however; both showed very lower antimicrobial effect than SEO. All active films showed lower inhibitory zone for S. aureus than S. typhimurium and P. fluorescence. The chicken breast fillets wrapped in the films containing VOO-GSO-SEO (0.15-0.15-0.02 g/g polymer) showed considerably lower total viable count (TVC), Pseudomonas spp., Enterobacteriaceae, E. coli 157:H7 and S. typhimurium count than the control one during 12 days storage. Also, it caused significant decrease in peroxide value (PV), thiobarbituric acid reactive substances (TBARS) and total volatile basic nitrogen (TVB-N) of fillet samples.
['Khah|Mehran Dolat|MD|', 'Ghanbarzadeh|Babak|B|', 'Roufegarinejad Nezhad|Leila|L|', 'Ostadrahimi|Alireza|A|']
D000818:Animals D000890:Anti-Infective Agents D002645:Chickens D004655:Emulsions D018857:Food Packaging D005780:Gelatin D006090:Gram-Negative Bacteria D006094:Gram-Positive Bacteria D056604:Grape Seed Extract D008420:Manufactured Materials D008422:Materials Testing D008460:Meat D018625:Microscopy, Atomic Force D008855:Microscopy, Electron, Scanning D009584:Nitrogen D009822:Oils, Volatile D000069463:Olive Oil D010368:Pectins D010539:Permeability D010938:Plant Oils D017550:Spectroscopy, Fourier Transform Infrared D013227:Steam D013718:Tensile Strength D017392:Thiobarbituric Acid Reactive Substances D027843:Vitis
Virgin olive oil Grape seed oil Antimicrobial property Emulsified blend film