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Showing 1 to 15 of 15 for “"Romaine Lettuce"”.
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Effects of Food Safety Events on U.S. Romaine Lettuce Prices
Romaine lettuce and leafy greens have been at the center of food safety concerns over the last several years. More specifically, romaine lettuce has been directly linked to seven(7) foodborne illness outbreaks and resulted in five(5) recalls over the eight(8) years period of January 1, 2012, to …
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Ultrasonication as an abiotic elicitor - effects on antioxidant capacity and overall quality of romaine lettuce
… on antioxidant capacity and overall quality of Romaine lettuce was evaluated. Whole leaf lettuce was treated with ultrasound (25 kHz) at APD of 26 W/L for 1 - 3 minutes and stored at room temperature for up to 150 hours. Quality indices examined included color, texture, total phenolics, …
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Survival and virulence of Escherichia coli O157:H7 on romaine lettuce and its packaging film when kept under extended refrigerated storage
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Aggregative swab sampling method for romaine lettuce show similar quality indicators and microbial profiles compared to composite tissue samples in a pilot study
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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Effects of ultrasonication in combination with selected sanitizer and surfactant on the quality and microbial safety of produce
… on produce quality, were examined. To examine if lettuce will be floating or submerged in a washing solution, the water absorption and thus changes in specific gravity of whole head Iceberg lettuce at two storage (5 C and 23°C) and two washing solution (4 C and 23°C) temperatures were first …
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Efficacy and impact of sanitizers in controlling pathogenic bacteria on irrigation water
… well as their effects on soil and plant health (romaine lettuce) under greenhouse conditions. Chlo at 60 ppm, SAS at 0.60%, and PAA at 30 ppm achieved a 3-log reduction, with no viable cells after enrichment, for all strains after a 5-minute contact time (P<0.05). The corrosion capacity for the …
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Effect of airflow and carbon dioxide on growth, yield, and gas exchange of lettuce
Romaine lettuce (Lactuca sativa var. longifolia L.) was grown hydroponically inside a walk-in growth chamber (Conviron, PGW36) with two levels of airflow (0.36 and 2.50 m$\rm\cdot s\sp{-1})$ at different atmospheric CO$\sb2$ concentrations (350 and 700 $\rm\mu mol\cdot mol\sp{-1}).$ A combination …
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Utilization of chlorine dioxide gas in food packaging application
… effect of ClO<sub>2</sub> gas, on shredded Romaine lettuce, indicated that minimizing the distance between gas releasing spot and target surfaces, as well as, maximizing gas releasing surface could significantly improve antimicrobial activity of ClO<sub>2</sub> gas in particular packaging …
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Artificial phylloplanes: A novel tool to study parameters linked to bacterial and viral contamination of fresh produce
… epicuticular characteristics of ‘Outredgeous’ romaine lettuce and ‘Carmel’ spinach to a high fidelity was developed. The artificial produce leaf surfaces were utilized to study the effect of surface hydrophobicity on the attachment of E. coli O157:H7 and Listeria innocua. The PDMS- artificial …
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Growth probability of Escherichia coli O157:H7 and Listeria monocytogenes in packaged fresh-cut romaine mix at fluctuating temperatures during simulated transport, retail storage and display
… L. monocytogenes growth in commercial bags of romaine lettuce mix. Microbial growth predictions using the Baranyi/Ratkowsky and McKellar models were validated by comparing the root mean square error (RMSE) and bias between the laboratory growth data and model predictions. Monte Carlo …
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Investigating behaviors of zoonotic and human pathogens on plants
… to reduce the persistence of Listeria on lettuce plants as well as its inhibitory properties towards L. monocytogenes on cantaloupe rind. In addition to studying plant-microbe interactions between plants and human bacterial pathogens, it is also important to address plant associations with …
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Effect of Standard Post-harvest Interventions of Fresh Vegetables on Bacterial Community Dynamics, Pathogen Survival and Antibiotic Resistance
… carryover of ARB and ARGs, carrots or romaine lettuce leaves were dipped in a slurry derived from composted manure from dairy cows previously dosed with antibiotics and further inoculated with multi-drug resistant E. coli O157:H7, a human pathogen, and a spoilage-associated and …
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Decontamination of food and food-processing surfaces from norovirus by cold atmospheric-pressure gaseous plasma
… GII-4 on the surface of stainless steel and Romaine lettuce leaves under the same operational conditions as mentioned above. The lower inactivation of HuNoV GII-4 by CAP as compared to FCV was due to underestimation by the EMA-RT-qPCR method. The presence of fecal impurities in the HuNoV …
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Improving preharvest sampling for pathogens in leafy greens through simulations and development of alternative approaches
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Investigation on Factors Influencing Ultrasound-assisted Surface Decontamination of Fresh and Fresh-cut Vegetables
… in washing solutions used for fresh-cut lettuce washes. The effects of ultrasound parameters and operational conditions on the uniformity of the acoustic field in the ultrasonic channel, and on surface decontamination of leafy green produce, were also examined. A continuous-flow pilot …