Emerging Non-thermal Processing of Food: Influence on Structure, Function, Nutrition and Safety of Foods

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Engineering and Technology".

Deadline for manuscript submissions: 10 June 2024 | Viewed by 1255

Special Issue Editor


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Guest Editor
Laboratory of Food Engineering, Saitama University, Saitama 338-8570, Japan
Interests: high hydrostatic pressure; non-thermal processing; physico-chemical property; sensing

Special Issue Information

Dear Colleagues,

Conventional heat processing of foods is known to cause a decrease in volatile substances, nutritional components and enzymatic activities. On the other hand, consumers sometimes desire foods with a flavour and nutrients similar to those of raw foods. Therefore, non-thermal food processing methods are attracting attention as an emerging technological alternative to thermal processing. For example, high hydrostatic pressure can be applied to foods to minimize the loss of nutrients, although the cellular structure is damaged to some extent. In addition, new enzymatic reactions can occur as the cellular structure is damaged, making it possible to develop new food ingredients with increased nutritional content. On the other hand, food processing using high hydrostatic pressure can inactivate some microorganisms, which is known to contribute to food safety and is beginning to be used as a new food processing method in the food industry worldwide.

Other emerging food processing methods, such as pulsed electric field treatment and high-frequency treatment, are also known as innovative food processing methods that do not require external heat treatment. This Special Issue introduces the latest research on emerging non-thermal processing applicable to the food industry.

Prof. Dr. Shigeaki Ueno
Guest Editor

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Keywords

  • non-thermal processing
  • structure
  • function
  • nutrition
  • safety
  • texture

Published Papers (1 paper)

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Research

17 pages, 1960 KiB  
Article
Effect of Optimized UV-LED Technology on Modeling, Inactivation Kinetics and Microbiological Safety in Tomato Juice
by Fernando Salazar, Sebastián Pizarro-Oteíza, Sebastián Molinett and Mariela Labbé
Foods 2024, 13(3), 430; https://doi.org/10.3390/foods13030430 - 29 Jan 2024
Viewed by 923
Abstract
This research analyzed, optimized and modeled the inactivation kinetics of pathogenic bacteria (PB1: Escherichia coli O157:H7 and PB2: Listeria monocytogenes) and determined the microbiological safety of tomato juice processed by UV-LED irradiation and heat treatment. UV-LED processing conditions were optimized using response [...] Read more.
This research analyzed, optimized and modeled the inactivation kinetics of pathogenic bacteria (PB1: Escherichia coli O157:H7 and PB2: Listeria monocytogenes) and determined the microbiological safety of tomato juice processed by UV-LED irradiation and heat treatment. UV-LED processing conditions were optimized using response surface methodology (RSM) and were 90% power intensity, 21 min and 273–275 nm (251 mJ/cm2) with R2 > 0.96. Using the optimal conditions, levels of PB1 and PB2 resulted a log reduction of 2.89 and 2.74 CFU/mL, respectively. The Weibull model was efficient for estimating the log inactivation of PB1 and PB2 (CFU/mL). The kinetic parameter δ showed that 465.2 mJ/cm2 is needed to achieve a 90% log (CFU/mL) reduction in PB1 and 511.3 mJ/cm2 for PB2. With respect to the scale parameter p > 1, there is a descending concave curve. UV-LED-treated tomato juice had an 11.4% lower Listeria monocytogenes count than heat-treated juice on day 28 (4.0 ± 0.82 °C). Therefore, UV-LED technology could be used to inactivate Escherichia coli O157:H7 and Listeria monocytogenes, preserving tomato juice for microbiological safety, but studies are required to further improve the inactivation of these pathogens and analyze other fruit and vegetable juices. Full article
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