Novel ultrasonic-assisted vacuum drying technique for dehydrating garlic slices and predicting the quality properties by low field nuclear magnetic resonance

Chen, Yannan; Li, Meng; Dharmasiri, Thasmi Shashikala Kumari; Song, Xiangyun; Liu, Feng; Wang, Xiao

doi:10.1016/j.foodchem.2019.125625

Cited by 60 publications

(35 citation statements)

References 40 publications

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“…The second peak had relaxation times of 0.01–0.1 s and appeared to represent immobilized water trapped in the cytoplasm. The third peak had the longest relaxation times (0.1–1 s) and represented mobile free water in the vacuoles and intercellular spaces (Chen et al., 2019). Figure 8 shows the relaxation times of different water forms in strawberries and the ratio of the peak areas after inversion.…”

Section: Resultsmentioning

confidence: 99%

“…In the LDPE/EVA film without microspheres (package A), the hydrogen peroxide content was 17.42 ± 0.98 mmol/ kg on 10 days, which was 29.90% higher than that of the LDPE/EVA film containing CS/SA microspheres (package B) and 35.14% higher than that of the LDPE/EVA film containing oregano EO-loaded microcapsules (package C). The difference among packages A, B, and in the vacuoles and intercellular spaces (Chen et al, 2019). Figure 8 shows the relaxation times of different water forms in strawberries and the ratio of the peak areas after inversion.…”

Section: Mda Content and Hydrogen Peroxide Content Of Strawberrymentioning

confidence: 99%

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Active packaging film containing oregano essential oil microcapsules and their application for strawberry preservation

Song²,

Shen³

et al. 2020

J. Food Process. Preserv.

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Strawberries are one of the most popular fruit due to their flavor, rich nutrition, and physiological functions, such as anti-oxidation, anti-tumor, antibacterial, anti-inflammatory, and anti-aging properties and prevention of cardiovascular diseases (Giampieri et al., 2012). Physical damage during postharvest handling, transportation, and storage and sensitivity to fungal (mostly of Botrytis cinerea) decay make strawberries extremely perishable (Luksiene, &

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Section: Resultsmentioning

confidence: 99%

Section: Mda Content and Hydrogen Peroxide Content Of Strawberrymentioning

confidence: 99%

Active packaging film containing oregano essential oil microcapsules and their application for strawberry preservation

Song²,

Shen³

et al. 2020

J. Food Process. Preserv.

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show abstract

“…Also, Figure 3 showed that the drying rate was higher at the beginning stage of drying and decreased gradually as drying continued. Drying of thin layer lotus seed was observed to take place in two distinct periods (a rising rate stage and a falling rate stage) and remain mainly in the falling rate period for all drying techniques, which is similar to the drying characteristics of garlic slices (Chen et al, 2020).…”

Section: Results and Methodsmentioning

confidence: 53%

Process effectiveness assessment by modeling the kinetics of lotus seed drying combining air‐borne ultrasound and microwave vacuum

Wang

Lei

et al. 2021

J Food Process Engineering

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This study presents the effects of ultrasound (US) on the drying kinetics of lotus seeds in a hybrid dryer equipped with constant microwave power in combination with airborne US at vacuum degree (USMVD) and atmospheric pressure (USMD) from 120 to 440 W of five US power levels. Water‐borne US pretreatment before microwave drying (US + MD) or microwave vacuum drying (US + MVD) was simultaneously performed to compare their effectiveness in drying lotus seeds under the same US power. USMD and USMVD techniques reduced the drying time up to 26.19% and 14.29% while reducing energy consumption by up to 10.42% and 23.02% when compared with MVD and MD (without US), respectively, and with relatively high ultrasonic power density. The US + MD and US + MVD drying also reduced the processing time and energy consumption compared to MD and MVD process, respectively, but was less effective than USMVD and USMD. In addition, with higher US power applied, drying occurred more rapidly with less energy consumption. The newly proposed model showed the best fit to the drying curve based on model with the highest regression coefficient, lowest root mean square error, sum square error, and chi‐square. Furthermore, the enhanced effectiveness by USMVD and USMD could be attributed to the respective “heating” and “synergistic” effects generated by microwave and US. Therefore, US in combination with MVD or MD could be used jointly owing to the enhanced process effectiveness. Practical applications Drying process is one of the most complex and energy‐consuming processes. The drying kinetics model was applied in drying equipment engineering. The drying kinetic model studies the law of moisture changes during the drying process and provides a theoretical basis for the adjustment of the lotus seed drying equipment parameters. In order to improve the quality of drying products and optimize the drying process, it is necessary to use mathematical model to simulate the drying process under different drying conditions. This study provides data support for equipment selection, energy saving, and consumption reduction and industrial design of lotus seeds drying process.

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“…It is impossible to guarantee the quality of prepared pieces after the drying process or to optimize process parameters. At the same time, there are many reports on drying mechanisms for fruits, vegetables and seafoods, such as strawberries [16], garlic [17], carrots [18] and abalone [19]. The above studies typically use combinations of multiple technologies to monitor changes in physical properties that occur during drying.…”

Section: Discussionmentioning

confidence: 99%

Research on the drying Mechanism of Astragali Radix during Processing

Peng¹,

Wu²,

Ye³

et al. 2021

Preprint

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Backgroundstragali Radix (Huangqi) is an important Chinese herbal medicine that is always processed into pieces for clinical use. There are many operations required after harvesting, among which drying of AR pieces is a key step. Unfortunately, research on the drying mechanism is still limited.MethodsLow-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) techniques were applied to study the water status and water distribution during the drying process. The contents of bioactive ingredients and texture changes were measured by HPLC and texture analyzer, respectively.ResultsDuring the drying process, the moisture content first decreased rapidly. After a particular time, the moisture content decreased slowly, and the equilibrium value was reached. The trends for changes in flavonoid glycoside and flavonoid aglycone contents in AR pieces were entirely opposite. The relaxation times T22 and T23 and the peak areas A22 and ATotal decreased significantly during drying. In addition, the intensity of the water signal decreased from the surface to the interior. The textural parameters hardness, adhesion and fracturability increased without an apparent change in springiness. The parameters of LF-NMR and the texture analyzer were correlated with water content.ConclusionsThis study indicated that HPLC, LF-NMR, MRI and texture analyzers provide a scientific basis for elucidating the principles for drying of AR pieces. The method is useful and shows potential for popularization and application; accordingly, it can easily be extended to other radix and/or rhizoma Traditional Chinese Medicinal materials.

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Novel ultrasonic-assisted vacuum drying technique for dehydrating garlic slices and predicting the quality properties by low field nuclear magnetic resonance

Cited by 60 publications

References 40 publications

Active packaging film containing oregano essential oil microcapsules and their application for strawberry preservation

Active packaging film containing oregano essential oil microcapsules and their application for strawberry preservation

Process effectiveness assessment by modeling the kinetics of lotus seed drying combining air‐borne ultrasound and microwave vacuum

Research on the drying Mechanism of Astragali Radix during Processing

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