Effects of tray drying, vacuum infrared drying, and vacuum microwave drying techniques on quality characteristics and aroma profile of orange peels

Coriandrum sativum L. is a medicinal and aromatic plant spread around the world, with beneficial properties that are well recognized. Both coriander seeds and leaves are used for pharmaceutical and flavoring purposes. Even though coriander seeds tend to be more popular, the leaves are receiving a consistently growing interest, especially because of popularization of Mexican, Northern African, and Indian cuisines. This increased attention brings about the necessity for providing the product with guaranteed quality, which will retain its valuable characteristics, even after post-harvest treatment. For this reason, it is highly necessary to determine reliable protocols for cilantro preservation, which usually include drying procedures; in order to identify the optimal drying treatments, a spectrum of drying techniques—convective, vacuum-microwave, and a combination of convective and vacuum-microwave—were evaluated. Cilantro-based dried products were examined from the perspectives of volatile organic constituent composition and sensory quality. After headspace solid-phase microextraction-GC/MS analysis and sensory tests, the results demonstrate that convective drying at 70 °C for 120 min followed by vacuum-microwave drying at 360 W and convective drying at 70 °C were the optimal drying methods for preserving cilantro aroma quality, while convective drying at 70 °C for 120 min followed by convective finishing drying at 50 °C decreased cilantro aroma quality.

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Drying Kinetics and Quality Characteristics of Slightly Salted Grass Carp Fillets by Hot Air Drying and Vacuum Microwave Drying

Journal of Aquatic Food Product Technology ◽

10.1080/10498850.2012.677969 ◽

2013 ◽

Vol 22 (6) ◽

pp. 595-604 ◽

Cited By ~ 4

Author(s):

Juan Wan ◽

Min Zhang ◽

Yingqiang Wang ◽

Arun S. Mujumdar ◽

Wang Yong-Jun

Keyword(s):

Grass Carp ◽

Quality Characteristics ◽

Drying Kinetics ◽

Microwave Drying ◽

Hot Air Drying ◽

Air Drying ◽

Hot Air ◽

Vacuum Microwave

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Comparison of microwave drying and oven-drying techniques for moisture determination of three paddy (Oryza sativa L.) varieties

Chemical and Biological Technologies in Agriculture ◽

10.1186/s40538-019-0164-1 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

A. M. C. Nirmaan ◽

B. D. Rohitha Prasantha ◽

B. L. Peiris

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Microwave Drying ◽

Moisture Determination ◽

Oven Drying ◽

Drying Techniques

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The Effectiveness of Vacuum-microwave Drying Methods in the Preservation of Amelanchier Berries (Amelanchier canadensis L. Medik.)

International Journal of Food Engineering ◽

10.1515/ijfe-2016-0346 ◽

2017 ◽

Vol 13 (6) ◽

Cited By ~ 1

Author(s):

Jan Piecko ◽

Dorota Konopacka ◽

Monika Mieszczakowska-Frąc ◽

Dorota Kruczyńska

Keyword(s):

Reference Method ◽

Raw Material ◽

Microwave Drying ◽

Convective Drying ◽

Drying Methods ◽

Microwave Method ◽

Nutritional Values ◽

Vacuum Microwave ◽

Challenges And Opportunities ◽

Dried Fruit

Abstract In Poland, Amelanchier berries are of considerable interest to both consumers and potential producers, which presents marketing challenges and opportunities. An attempt was made to preserve Amelanchier berries using a vacuum-microwave method of drying in order to determine its usefulness for producing microbiologically stable dried fruit with a high nutritional values. The berry variety “Prince William” (Amelanchier canadensis) was chosen as the experimental material. Vacuum-microwave drying was performed in two variants: (convective drying [CD] + vacuum microwave method [VMW]) after convective pre-drying of fruit and (VMW) without pre-drying. Unassisted CD was used as the reference method. Application of a vacuum-microwave drying method to Amelanchier berries makes it possible to obtain a stable preserved product of high-quality, yielding moderate shrinkage and good retention of bioactive compounds. An optimized method of vacuum-microwave drying, applied directly to frozen fruit, allows the retention of 70 % of cyanidin glycosides present in the raw material.

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Effects of drying methods on color retention and chlorophyll of celery (ApiumgraveolensL.), spinach (Spinacia oleraceaL.), Malabar spinach (Basella albaL.)

The Journal of Agriculture and Development ◽

10.52997/jad.6.06.2020 ◽

2020 ◽

pp. 53-61

Author(s):

Dat Q Tran

Keyword(s):

Microwave Drying ◽

Drying Methods ◽

Hot Air Drying ◽

Drying Time ◽

Air Drying ◽

Color Retention ◽

Hot Air ◽

Drying Techniques ◽

Dried Vegetables

Dried vegetables are considered convenient for storage, transportation and preservation. The different drying techniques could influence the quality of resulting products. This study aimed to evaluate the effects of three distinguish drying methods as hot-air drying, foam-mat drying and microwave drying on the color retention and chlorophyll of green vegetables powder. Fresh spinach(Spinacia oleraceaL.), celery (Apium graveolensL.), Malabar spinach (Basella albaL.) were dried by different methods: hot air at 60oC, foam-mat at 60oC and microwave at 270 W until the samples reached approximately 9% of moisture content (wb). The drying time of the dried samples by microwave, foam-mat and hot-air method were 60, 210 and 240 min, respectively. Foam-mat dried vegetables were found to have the best quality in terms of color and the residual chlorophyll content. The findings suggest that foam-mat drying is promising in dried vegetable processing

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Applicability of vacuum-microwave drying for tomato fruit based on evaluations of energy cost, color, functional components, and sensory qualities

Journal of Food Processing and Preservation ◽

10.1111/jfpp.13625 ◽

2018 ◽

Vol 42 (6) ◽

pp. e13625 ◽

Cited By ~ 11

Author(s):

Takahiro Orikasa ◽

Shoji Koide ◽

Hana Sugawara ◽

Manami Yoshida ◽

Kazuhisa Kato ◽

...

Keyword(s):

Energy Cost ◽

Tomato Fruit ◽

Microwave Drying ◽

Vacuum Microwave ◽

Sensory Qualities ◽

Functional Components

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Determination of Various Drying Methods’ Impact on Odour Quality of True Lavender (Lavandula angustifolia Mill.) Flowers

Molecules ◽

10.3390/molecules24162900 ◽

2019 ◽

Vol 24 (16) ◽

pp. 2900 ◽

Cited By ~ 4

Author(s):

Łyczko ◽

Jałoszyński ◽

Surma ◽

García-Garví ◽

Carbonell-Barrachina ◽

...

Keyword(s):

Solid Phase ◽

Microwave Drying ◽

Convective Drying ◽

Drying Methods ◽

Drying Method ◽

Sensory Panel ◽

Lavandula Angustifolia ◽

Preservation Method ◽

Vacuum Microwave

True lavender flowers (Lavandula angustifolia Mill.) is a critical source of essential oils and a flavouring agent used in numerous industries like foods, cosmetics and pharmaceuticals. Its main volatile constituents are linalool and linalyl acetate, which are commonly considered as main odour-active constituents (OACs). Nevertheless, the quality of true lavender flowers is highly dependent on its post-harvest treatment, mainly the preservation method. Recognising that drying is the most frequently used preservation method, the influence of various drying methods, including convective drying (CD) at 50, 60 and 70 °C, vacuum-microwave drying (VMD) with powers 240, 360 and 480 W and combined convective pre-drying at 60 °C followed by vacuum-microwave finish-drying with power 480 W (CPD-VMFD), on the quality of true lavender flowers was verified. The evaluation of influence was carried out by HS-SPME(HS, solid-phase microextraction), GC-MS, GC-MS-O (gas chromatography–mass spectrometry–olfactometry) techniques. Moreover, the sensory panel has assessed the sample odour quality. As a result, the optimal drying methods regarding the requirements for products were established. Overall, for total essential oil recovery, CD at 50 °C is the optimal drying method, while for odour quality concerning the sensory panel evaluation, VMD with power 360 W combined CPD-VMFD and CD at 50 °C is the optimal drying method.

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