Effects of different drying methods on the proximate composition, antioxidant activity, and phytochemical content of Hibiscus sabdariffa L. Calyx

Akther, Farhana; Alim, Md. Abdul; Nasrin, Najia Akter; Khan, Mahnaz; Gomes, David Noel; Suhan, Md.; Islam, Monirul; Begum, Rokeya

doi:10.1016/j.focha.2023.100553

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Briefly, the lyophilized samples (100 µL) were mixed with DPPH ethanol solution (0.15 mol/mL, 100 µL) and placed into a 96-well plate, the blank control was DPPH ethanol solution (100 µL) and sample solvent (100 µL). After incubation for 1 h in obscurity, the DPPH radical scavenging activity was assessed at the absorbance of 517 nm and calculated using Equation ( 5) [36].…”

Section: Dpph-radical Scavenging Activitymentioning

confidence: 99%

Effect of Direct-Contact Ultrasonic and Far Infrared Combined Drying on the Drying Characteristics and Quality of Ginger

Feng,

Zhang,

Guo

et al. 2024

Processes

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In this study, the effects of ultrasonic power, drying temperature, and slice thickness on the drying rate, chromatism, water migration law, gingerol content, flavor, and antioxidant activity of ginger were investigated by using a direct-contact ultrasound and far infrared combined drying technology. The results showed that compared with single far infrared drying, direct-contact ultrasound and far infrared combined drying accelerated the free water migration rate of ginger (7.1~38.1%), shortened the drying time (from 280 min to 160 min), reduced the loss of volatile components in ginger, and significantly increased the antioxidant activity of ginger (p < 0.05). Furthermore, after ultrasound intervention, the gingerol content decreased in slices of 4 mm thickness (0.1226 ± 0.0189 mg/g to 0.1177 ± 0.0837 mg/g) but increased in slices of 6 mm thickness (0.1104 ± 0.0162 mg/g to 0.1268 ± 0.0112 mg/g). This drying technology has a certain reference significance for the drying process of ginger slices.

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Section: Dpph-radical Scavenging Activitymentioning

confidence: 99%