Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices

An infrared-assisted heat pump drying (IR-HPD) was designed and used for drying of mushroom slices at three different infrared (IR) powers (50, 100, and 150 W) and a fixed drying temperature of 40°C and air velocity of 1 m/s. The changes in total phenolic content (TPC), total antioxidant capacity (...

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Main Authors: Senanur Durgut Malçok, Azime Özkan Karabacak, Ertürk Bekar, Cüneyt Tunçkal, Canan Ece Tamer
Format: Article
Language:English
Published: PAGEPress Publications 2023-10-01
Series:Journal of Agricultural Engineering
Subjects:
Online Access:https://agroengineering.org/index.php/jae/article/view/1537
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author Senanur Durgut Malçok
Azime Özkan Karabacak
Ertürk Bekar
Cüneyt Tunçkal
Canan Ece Tamer
author_facet Senanur Durgut Malçok
Azime Özkan Karabacak
Ertürk Bekar
Cüneyt Tunçkal
Canan Ece Tamer
author_sort Senanur Durgut Malçok
collection DOAJ
description An infrared-assisted heat pump drying (IR-HPD) was designed and used for drying of mushroom slices at three different infrared (IR) powers (50, 100, and 150 W) and a fixed drying temperature of 40°C and air velocity of 1 m/s. The changes in total phenolic content (TPC), total antioxidant capacity (TAC) and individual phenolic contents bioaccessibility, drying characteristics, and colour values of mushroom slices were investigated. IR-HPD provided 13.11 to 30.77% higher energy savings than HPD and reduced drying time between 9.48 and 26.72%. Page, Modified Page models were considered the best for predicting the thin layer drying behaviour of mushroom slices. The effective moisture diffusivity (Deff) value increased with IR power and ranged between 6.491x10-10 and 9.023x10-10 m2s-1. The contents of TPC, TAC, and individual phenolics in mushroom slices were significantly reduced (p<0.05) after drying. In vitro the bioaccessibility of phenolic compounds and TAC generally decreased, whereas TPC bioaccessibility was increased. Colour values were decreased except for a* value that increased after drying. Thermal imaging results showed that IR lamps increase the temperature of the products in the middle close to the lamp by approximately 1.5°C. In addition, thermal imaging gave a better understanding and visualised the effect of different power IR lamps on the temperature distribution of the products according to their distance from the lamp. As a result, drying mushrooms with a hybrid drying system combined with IR and heat pump dryer provided higher energy savings than HPD, reduced drying time, and maintained the physical and nutritional characteristics of mushrooms. Overall, the use of IR-HPD is an alternative tool that allows us to obtain high-quality dried mushrooms with good nutritional attributes and a high amount of bioaccessible polyphenols.
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spelling doaj.art-8839a2bdef7c4721ad1c79f88fc964402023-10-11T20:06:36ZengPAGEPress PublicationsJournal of Agricultural Engineering1974-70712239-62682023-10-0154310.4081/jae.2023.1537Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slicesSenanur Durgut Malçok0Azime Özkan Karabacak1Ertürk Bekar2Cüneyt Tunçkal3Canan Ece Tamer4Faculty of Agriculture, Department of Food Engineering, Bursa Uludag University, Gorukle, BursaGemlik Asim Kocabiyik Vocational School, Food Technology Program, Bursa Uludag University, Gemlik, Bursa; Science and Technology Application and Research Center, Bursa Uludag University, Gorukle, BursaFaculty of Agriculture, Department of Food Engineering, Bursa Uludag University, Gorukle, Bursa; Science and Technology Application and Research Center, Bursa Uludag University, Gorukle, BursaElectric and Energy Department, Air Conditioning and Refrigeration Technology Program, Yalova Community College, Yalova UniversityFaculty of Agriculture, Department of Food Engineering, Bursa Uludag University, Gorukle, Bursa An infrared-assisted heat pump drying (IR-HPD) was designed and used for drying of mushroom slices at three different infrared (IR) powers (50, 100, and 150 W) and a fixed drying temperature of 40°C and air velocity of 1 m/s. The changes in total phenolic content (TPC), total antioxidant capacity (TAC) and individual phenolic contents bioaccessibility, drying characteristics, and colour values of mushroom slices were investigated. IR-HPD provided 13.11 to 30.77% higher energy savings than HPD and reduced drying time between 9.48 and 26.72%. Page, Modified Page models were considered the best for predicting the thin layer drying behaviour of mushroom slices. The effective moisture diffusivity (Deff) value increased with IR power and ranged between 6.491x10-10 and 9.023x10-10 m2s-1. The contents of TPC, TAC, and individual phenolics in mushroom slices were significantly reduced (p<0.05) after drying. In vitro the bioaccessibility of phenolic compounds and TAC generally decreased, whereas TPC bioaccessibility was increased. Colour values were decreased except for a* value that increased after drying. Thermal imaging results showed that IR lamps increase the temperature of the products in the middle close to the lamp by approximately 1.5°C. In addition, thermal imaging gave a better understanding and visualised the effect of different power IR lamps on the temperature distribution of the products according to their distance from the lamp. As a result, drying mushrooms with a hybrid drying system combined with IR and heat pump dryer provided higher energy savings than HPD, reduced drying time, and maintained the physical and nutritional characteristics of mushrooms. Overall, the use of IR-HPD is an alternative tool that allows us to obtain high-quality dried mushrooms with good nutritional attributes and a high amount of bioaccessible polyphenols. https://agroengineering.org/index.php/jae/article/view/1537Infrared-assisted heat pump drying (IR-HPD)mushroombioaccessibility.
spellingShingle Senanur Durgut Malçok
Azime Özkan Karabacak
Ertürk Bekar
Cüneyt Tunçkal
Canan Ece Tamer
Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
Journal of Agricultural Engineering
Infrared-assisted heat pump drying (IR-HPD)
mushroom
bioaccessibility.
title Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
title_full Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
title_fullStr Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
title_full_unstemmed Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
title_short Influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics, colour, thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
title_sort influence of a hybrid drying combined with infrared and heat pump dryer on drying characteristics colour thermal imaging and bioaccessibility of phenolics and antioxidant capacity of mushroom slices
topic Infrared-assisted heat pump drying (IR-HPD)
mushroom
bioaccessibility.
url https://agroengineering.org/index.php/jae/article/view/1537
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