Evacuated tube solar and sun drying of beetroot slices: Comparative assessment of thermal performance, drying kinetics, and quality analysis

Malakar, Santanu; Alam, M. R.; Arora, Vinkel Kumar

doi:10.1016/j.solener.2022.01.029

Cited by 49 publications

(19 citation statements)

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“…The betacyanin and betaxanthin content of beetroot were found to be 4.162 and 3.174 mg/g, respectively, when processed in an evacuated tube solar dryer. Besides, the average betalain content of 4.49 and 1.61 mg/g was reported in evacuated tube solar dryer and sun-drying, respectively (Malakar et al, 2022 67 mg/100 g) of peel and flesh of red dragon fruit, respectively (Ramli et al, 2014).…”

Section: Factors Affecting Yield Of Betalainsmentioning

confidence: 97%

Application of ultrasound technology for extraction of color pigments from plant sources and their potential bio‐functional properties: A review

Kumar

Upadhyay

Yadav

et al. 2022

J Food Process Engineering

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Natural colorants/pigments are nowadays gaining popularity due to increased consumer awareness and severe health problems caused by the use of synthetic pigments. The efficient extraction of natural pigments from different plant sources leads to their effective application as substitutes for synthetic pigments in the food processing sector. In the present review, authors discussed the mechanistic approach of a novel ultrasonication technique in the extraction of natural color pigments having potential bio-functional characteristics leading to numerous health benefits. The recent advancements in the ultrasound-assisted extraction (UAE) of plant pigments including anthocyanins, betalains, carotenoids, and chlorophyll were explored. The most significant observations were that the extraction efficiency improved due to the phenomenon of cavitation, low installation and maintenance costs, and reduced energy requirement. Further, the optimum extraction conditions, stability, and bioaccessibility of the pigment compound significantly impact the process parameters.Moreover, recent progress in enhancing the performance of the UAE technique was addressed. Practical applicationsUltrasound-assisted extraction (UAE) is an effective way to improve the recovery of natural pigments from plants. Ultrasound treatment is a novel green extraction technology that offers a wide range of benefits. The present review conveys a better understanding of UAE mechanisms and optimum conditions of extracted pigments from different plant sources for their effective use as a natural colorant in food applications on an industrial scale.

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Section: Factors Affecting Yield Of Betalainsmentioning

confidence: 97%

Application of ultrasound technology for extraction of color pigments from plant sources and their potential bio‐functional properties: A review

Kumar

Upadhyay

Yadav

et al. 2022

J Food Process Engineering

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“…In addition, the trend of TPC under different temperatures was consistent with the trend of tannin contents. Considering tannins as a major phenolic substance in persimmon, the change in their contents could be used to show the trend of total phenolic substances [ 4 , 31 ]. From Figure 7 , it was also found that the TPC of persimmon slices declined gradually when the drying temperature of PVD increased from 60 to 65 °C, while the TPC reached its maximum value of 6.97 (mg GAE/g) at 70 °C.…”

Section: Resultsmentioning

confidence: 99%

Pulsed Vacuum Drying of Persimmon Slices: Drying Kinetics, Physicochemical Properties, Microstructure and Antioxidant Capacity

Yang

Wang

Vidyarthi

et al. 2022

Plants

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In order to explore an alternative drying method to enhance the drying process and quality of persimmon slices, pulsed vacuum drying (PVD) was employed and the effects of different drying temperatures (60, 65, 70, and 75 °C) on drying kinetics, color, rehydration ratio (RR), microstructure, bioactive compounds, and the antioxidant capacity of sliced persimmons were investigated in the current work. Results showed that the rehydration ratio (RR) of the samples under PVD was significantly higher than that of the traditional hot air-dried ones. Compared to the fresh samples, the dried persimmon slices indicated a decrease in the bioactive compounds and antioxidant capacity. The total phenolic content (TPC) of PVD samples at 70 °C was 87.96% higher than that of the hot air-dried persimmon slices at 65 °C. Interestingly, at 70 °C, the soluble tannin content and TPC of the PVD samples reached the maximum values of 6.09 and 6.97 mg GAE/g, respectively. The findings in the current work indicate that PVD is a promising drying method for persimmon slices as it not only enhances the drying process but also the quality attributes.

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“…In an experiment conducted by MALAKAR et al [80], betalain pigment retention was 63.98% higher for drying with an evacuated tubular solar dryer (ETSD) than for day drying. The color changes were higher when dried in the sun.…”

Section: Processing Of Beetroot and Effects Of Processing On Its Biol...mentioning

confidence: 99%

Red Beetroot (Beta Vulgaris L.)

Székely¹,

Máté²

2023

Advances in Root Vegetables Research

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Beetroot has long been a known and consumed vegetable, it was cultivated by the ancient Egyptians, Greeks, and Romans. Beetroot is a type of vegetable belonging to the beet (Beta) genus, which also includes chard, sugar beet, and fodder beet. Beetroot is easy to grow, as it is not one of the vegetables with special needs. The characteristic color of beets is due to red pigments known as betacyanins. Extremely rich in valuable ingredients, it is an extremely good immune booster due to its vitamin A, B, and C content. It is rich in antioxidants and also contains pantothenic acid, lycopene, biotin, silicon, potassium, magnesium, sodium, calcium, zinc, copper, manganese, and iron. Thanks to its content, it even has many health-protective effects, thanks to which it is highly recommended to consume. Beetroot is a deliciously sweet, albeit slightly earthy, superfood. It can be consumed in many ways; raw, as vegetable juice, boiled or fried, fermented, dried, but also as a food supplement in powdered form, and it can also be used as a natural colorant to color different food products.

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Evacuated tube solar and sun drying of beetroot slices: Comparative assessment of thermal performance, drying kinetics, and quality analysis

Cited by 49 publications

References 50 publications

Application of ultrasound technology for extraction of color pigments from plant sources and their potential bio‐functional properties: A review

Application of ultrasound technology for extraction of color pigments from plant sources and their potential bio‐functional properties: A review

Pulsed Vacuum Drying of Persimmon Slices: Drying Kinetics, Physicochemical Properties, Microstructure and Antioxidant Capacity

Red Beetroot (Beta Vulgaris L.)

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