The influence of electron beam irradiation of antimicrobial-coated LDPE/polyamide films on antimicrobial activity and film properties

Melt Production and Antimicrobial Efficiency of Low-Density Polyethylene (LDPE)-Silver Nanocomposite Film

“…A 200-ml flask containing TSB for bacteria, YMB for yeast, and 0.4 g of Tween 80 inoculated with 1 mL of E. coli (3.54×10 5 ) and S. aureus (22.30×10 6 ) and then incubated at 37°C for bacteria and 25°C for yeast with 150 rpm agitation. Evidence of microbial growth was acquired by reading the absorbance changes at 600 nm (Han et al 2007) by using a spectrophotometer (Genesys 20, ThermoSpectronic, USA) at regular intervals (2 h). The absorbance data were modeled according to Gompertz Zwietering et al (1990) to estimate microbial growth kinetic parameters:…”

“…So, most of the researches of antimicrobial food packaging has been based on LDPE polymer matrix. Some examples of antimicrobials which incorporated into LDPE are sorbate compound (Han et al 2007;Han and Floros 1997), imazalil (Vartianen et al 2003), nisin (Mauriello et al 2005), silver zeolite (Ishitani 1995), and natural extracts such as basil constituents (Suppakul et al 2008), grapefruit seed extract (Lee et al 1998), thymol and rosemary oleoresin (Han et al 2007), and clove extract (Hong et al 2000). Among all these, silver nanoparticles deserve special attention due to their unique properties, high thermal stability, and long-term activity, which differentiate from other antimicrobial additives.…”

Effectiveness of antimicrobial coated oriented polypropylene/polyethylene films in sprout packaging

“…AIT was the most effective antimicrobial followed by trans-cinnamaldehyde, garlic oil, and rosemary oil. The aforementioned compounds are effective against bacteria, fungi, yeast, and molds (Han et al, 2007;Matan et al, 2006;Pranoto et al, 2005;Suppakul, Sonneveld, Bigger, & Miltz, 2007). The antibacterial effect may be due to inhibition of the production of an essential enzyme or damage to the cell wall of the bacteria (Matan et al, 2006).…”

“…Especially, spices and their essential oils have been successfully used as natural food preservatives in the food industry (Oonmetta-aree, Suzuki, Gasaluck, & Eumkeb, 2006). Plant extracts such as cinnamaldehyde (Han, Castell-Perez, & Moreira, 2007;Rodriguez, Batlle, & Nerin, 2007), allyl isothiocyanate (AIT) (Chacon, Buffo, & Holly, 2006;Nadarajah, Han, & Holley, 2005;Park, Taormina, & Beuchat, 2000), oregano and carvocrol (Han et al, 2007;Rojas-Graü et al, 2007;Seydim & Sarikus, 2006), garlic oil (Pranoto, Rakshit, & Salokhe, 2005), and rosemary oleoresin (Han et al, 2007) have proven to be effective against E. coli, L. monocytogenes, yeast, and molds. Some phenolic compounds in plant extracts are believed to be responsible for the antimicrobial activity (Lin, Lebbe, & Shetty, 2004) by disturbing the function of bacterial membranes and impeding the growth and multiplication of bacteria (Sivarooban, Hettiarachchy, & Johnson, 2008).…”

Comparative Study of Antimicrobial Effectiveness of SPI-Cinnamaldehyde Composite Films as process Variety of Casting and Coating and Application

“…It is revealed that antimicrobial active amount of coating film was as about 1/20-1/30 as of SPI/ cinnamaldehyde films in all cinnamaldehyde concentrations. Previous observations described that when cinnamaldehyde incorporated polyamide resin was coated onto LDPE films; about 17% reduction in final cell concentration of E. coli and 15% reduction in L. innocua were observed (12).…”