Effect of mild heat treatment on browning‐related parameters in fresh‐cut Iceberg lettuce

2019 ◽  
Vol 43 (7) ◽  
Author(s):  
Celine Vanden Abeele ◽  
Katleen Raes ◽  
Imca Sampers
Keyword(s):  
Heat Treatment ◽  
Mild Heat ◽  
Iceberg Lettuce ◽  
Fresh Cut

scholarly journals Efficacy of chlorine, peroxyacetic acid and mild-heat treatment on the reduction of natural microflora and maintenance of quality of fresh-cut calçots (Allium cepa L.)

LWT ◽  
2018 ◽  
Vol 95 ◽  
pp. 339-345 ◽  
Author(s):  
Lorena Zudaire ◽  
Inmaculada Viñas ◽  
Maribel Abadias ◽  
Joan Simó ◽  
Ingrid Aguiló-Aguayo
Keyword(s):  
Heat Treatment ◽  
Allium Cepa ◽  
Peroxyacetic Acid ◽  
Mild Heat ◽  
Allium Cepa L ◽  
Natural Microflora ◽  
Fresh Cut

Mild heat treatment inhibits the browning of fresh-cut Agaricus bisporus during cold storage

LWT ◽  
2017 ◽  
Vol 82 ◽  
pp. 104-112 ◽  
Author(s):  
Lihua Zhang ◽  
Shunfeng Li ◽  
Anjian Wang ◽  
Jing Li ◽  
Wei Zong
Keyword(s):  
Heat Treatment ◽  
Cold Storage ◽  
Agaricus Bisporus ◽  
Mild Heat ◽  
Fresh Cut

scholarly journals High carbon-di-oxide modified atmospheric packaging on quality of ready-to-eat minimally processed fresh-cut iceberg lettuce

2021 ◽  
Author(s):  
Md. Azizul Haque ◽  
Md. Asaduzzaman ◽  
Md. Sultan Mahomud ◽  
Md. Rizvi Alam ◽  
Alin Khaliduzzaman ◽  
...  
Keyword(s):  
Modified Atmosphere Packaging ◽  
Storage Condition ◽  
Modified Atmosphere ◽  
High Carbon ◽  
Modified Atmospheric Packaging ◽  
Iceberg Lettuce ◽  
Microbial Development ◽  
Fresh Cut ◽  
Intact Surface

AbstractFresh-cut lettuce is a very well-known salad for today's routines because it obliges minimal preparation to minimize the loss of health beneficial vitamins, minerals, antioxidants and other phytochemicals. It is a prodigious challenge to serve its consumers fresh. Quality of freshly processed lettuce under high CO2 modified atmosphere packaging (MAP) has been investigated as a realistic alternative technique for its preservation. Storage under high CO2 atmospheric treatments exhibited a significant impact in microbial development, electrolyte leakage, volatile metabolites and sensory quality of fresh-cut iceberg lettuce. This storage condition (MAP 1: 5 kPa O2 and 20 kPa CO2 balanced by N2 at 7 °C for 6 days) inhibited the growth of mesophilic bacteria and yeasts; delayed the enzymatic browning (cut-edges and intact surface) of fresh-cut iceberg lettuce and overall visual quality was also in acceptance limit. The development of off-odors was perceived in high CO2 MAP as a consequence of volatiles (ethanol and acetaldehyde) accumulation which was persisted at an inexcusable level during 6 days of storage periods.

Tracking an Escherichia coli O157:H7–Contaminated Batch of Leafy Greens through a Pilot-Scale Fresh-Cut Processing Line

2014 ◽  
Vol 77 (9) ◽  
pp. 1487-1494 ◽  
Author(s):  
ANNEMARIE L. BUCHHOLZ ◽  
GORDON R. DAVIDSON ◽  
BRADLEY P. MARKS ◽  
EWEN C. D. TODD ◽  
ELLIOT T. RYSER
Keyword(s):  
Escherichia Coli ◽  
Membrane Filtration ◽  
Fluorescent Protein ◽  
Pilot Scale ◽  
Escherichia Coli O157 ◽  
E Coli ◽  
Leafy Greens ◽  
Iceberg Lettuce ◽  
Processing Line ◽  
Fresh Cut

Cross-contamination of fresh-cut leafy greens with residual Escherichia coli O157:H7–contaminated product during commercial processing was likely a contributing factor in several recent multistate outbreaks. Consequently, radicchio was used as a visual marker to track the spread of the contaminated product to iceberg lettuce in a pilot-scale processing line that included a commercial shredder, step conveyor, flume tank, shaker table, and centrifugal dryer. Uninoculated iceberg lettuce (45 kg) was processed, followed by 9.1 kg of radicchio (dip inoculated to contain a four-strain, green fluorescent protein–labeled nontoxigenic E. coli O157:H7 cocktail at 106 CFU/g) and 907 kg (2,000 lb) of uninoculated iceberg lettuce. After collecting the lettuce and radicchio in about 40 bags (~22.7 kg per bag) along with water and equipment surface samples, all visible shreds of radicchio were retrieved from the bags of shredded product, the equipment, and the floor. E. coli O157:H7 populations were quantified in the lettuce, water, and equipment samples by direct plating with or without prior membrane filtration on Trypticase soy agar containing 0.6% yeast extract and 100 ppm of ampicillin. Based on triplicate experiments, the weight of radicchio in the shredded lettuce averaged 614.9 g (93.6%), 6.9 g (1.3%), 5.0 g (0.8%), and 2.8 g (0.5%) for bags 1 to 10, 11 to 20, 21 to 30, and 31 to 40, respectively, with mean E. coli O157:H7 populations of 1.7, 1.2, 1.1, and 1.1 log CFU/g in radicchio-free lettuce. After processing, more radicchio remained on the conveyor (9.8 g; P < 0.05), compared with the shredder (8.3 g), flume tank (3.5 g), and shaker table (0.1 g), with similar E. coli O157:H7 populations (P > 0.05) recovered from all equipment surfaces after processing. These findings clearly demonstrate both the potential for the continuous spread of contaminated lettuce to multiple batches of product during processing and the need for improved equipment designs that minimize the buildup of residual product during processing.

Multi-method approach indicates no presence of sub-lethally injured Listeria monocytogenes cells after mild heat treatment

2008 ◽  
Vol 123 (3) ◽  
pp. 262-268 ◽  
Author(s):  
Mieke Uyttendaele ◽  
Andreja Rajkovic ◽  
Nancy Van Houteghem ◽  
Nico Boon ◽  
Olivier Thas ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Listeria Monocytogenes ◽  
Mild Heat ◽  
Multi Method Approach ◽  
Method Approach
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