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Evaluation of the Efficacy of Power ...

Joshi, Mayura Anand.

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Evaluation of the Efficacy of Power Ultrasound Technology Coupled With Organic Acids to Reduce Listeria monocytogenes on Peaches and Apples.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluation of the Efficacy of Power Ultrasound Technology Coupled With Organic Acids to Reduce Listeria monocytogenes on Peaches and Apples./
Author:	Joshi, Mayura Anand.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
Description:	82 p.
Notes:	Source: Masters Abstracts International, Volume: 85-11.
Contained By:	Masters Abstracts International85-11.
Subject:	Food science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31238730
ISBN:	9798382595023

Evaluation of the Efficacy of Power Ultrasound Technology Coupled With Organic Acids to Reduce Listeria monocytogenes on Peaches and Apples.
Joshi, Mayura Anand.

Evaluation of the Efficacy of Power Ultrasound Technology Coupled With Organic Acids to Reduce Listeria monocytogenes on Peaches and Apples. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 82 p.

Source: Masters Abstracts International, Volume: 85-11.

Thesis (M.S.)--Illinois Institute of Technology, 2024.

Fresh fruits and vegetables are prone to microbial contamination throughout different phases of human handling, processing, transportation, and distribution. Emerging technologies, such as power ultrasound, have received attention due to their capacity to reduce or eliminate foodborne bacterial pathogens on these commodities. Power ultrasound, when combined with certain antimicrobials, has demonstrated its effectiveness as a valuable tool for washing fresh produce. The objective of this study was to examine the effectiveness of power ultrasound combined with organic acids on the reduction of Listeria monocytogenes on fruits. In this study, peaches and apples were subjected to surface inoculation with a four-strain cocktail of L. monocytogenes and dried for 1 h. Stomacher bags, containing 225 mL of citric, lactic, or malic acids at concentrations of 1%, 2%, or 5%, were employed for treating inoculated peaches and apples. The acid treatment was used alone, or in combination with power ultrasound for 2, 5, or 10 min. Water was used for controls. Before treatment, the initial population of L. monocytogenes on apples was lower compared to the initial population on peaches, with apples showing a 1.94 log CFU/fruit reduction. Water controls demonstrated no significant log reduction in both apples and peaches. The greatest L. monocytogenes reduction on apples occurred when treated with 1% citric acid for 2 min with power ultrasound where L. monocytogenes was significantly reduced from 6.98±0.88 log CFU/fruit to 5.56±0.91 log CFU/fruit. The greatest L. monocytogenes reduction on peaches occurred when treated with 5% citric acid for 5 min with power ultrasound where L. monocytogenes was significantly reduced from 7.44±0.45 log CFU/fruit to 6.68±0.40 log CFU/fruit.Overall, the combined effect of acid and power ultrasound was more pronounced in apples than in peaches. The survival of L. monocytogenes on apples and peaches appeared to be highly dependent on the specific treatment and hurdle technology applied. The combination of ultrasound hurdle technology with acid washing has proven effective in reducing L. monocytogenes on both peaches and apples, with a more significant impact observed on apples. While acid washing is a more economical option compared to ultrasound technology, the efficiency of microorganism reduction is considerably enhanced when power ultrasound is combined with organic acids. Looking ahead, the development of cost-effective power ultrasound methods could facilitate widespread adoption of ultrasound hurdle technology in the produce industry.

ISBN: 9798382595023Subjects--Topical Terms:

3173303
Food science.
Subjects--Index Terms:

Apples

Evaluation of the Efficacy of Power Ultrasound Technology Coupled With Organic Acids to Reduce Listeria monocytogenes on Peaches and Apples.
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653 $a Organic acids
653 $a Outbreaks
653 $a Peaches
653 $a Power ultrasound
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