Investigation of Color and Bioactive Compounds of Different Colors from Pansy (Viola × wittrockiana Gams.) Dried in Hot Air Dryer

Hazar, Deniz; Boyar, İsmail; Dinçer, Cüneyt; Ertekin, Can

doi:10.3390/horticulturae9020186

Cited by 4 publications

(5 citation statements)

References 51 publications

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“…This result is very similar to another study where the flowers of S. elegans were maintained at 40 • C for 3 days and had 40.8 mgGAE/g [21]. The HA also increased the TPC content in C. megapotamica and in four varieties of Viola x wittrockiana [56]. This technique is considered more economical and makes it easier to preserve the EFs [23].…”

Section: Biochemical Analysissupporting

confidence: 87%

“…This result is similar to A. aurantiaca when the FD and HA at 50 and 60 • C increased the anthocyanins compared to fresh flowers and had similar contents between the post-harvest treatments [49]. In contrast, the higher anthocyanin content was in the HA treatment for some species such as B. cucullata and V. wittrockiana [41,49,56]. According to these authors, the increase in HA could be due to the inactivation of the PPO and the cycle time of drying.…”

Section: Biochemical Analysissupporting

confidence: 58%

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Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

Machado,

Pieracci,

Carmassi

et al. 2023

Horticulturae

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The post-harvest techniques are the most critical point to ensure the quality of edible flowers (EFs) and to keep the bioactive metabolites available for human nutrition. The different species of EFs also represent a problem in improving their consumption with safety. The present study focused on the description of the effects of the commonly used drying treatments in the phytonutritional composition of four species of EFs, Callianthe megapotamica, Callianthe striata, Nemesia strumosa and Salvia elegans. The bioactive metabolites and antioxidant activity were determined after freeze-drying (FD) and hot-air-drying (HA) treatments in comparison to fresh flowers. All EFs showed different mineral/trace compositions with potassium as the main element and 70–86% water loss. Both post-harvest treatments increased all the metabolites and antioxidant activity in each species. C. striata with FD treatment had the highest content of primary and secondary metabolites. N. strumosa has the highest ascorbic acid content with the HA treatment. All species had significant antioxidant activity, increasing with FD for C. striata while HA is more recommended for the other species. The post-harvest techniques are able to preserve and increase the bioactive metabolites and must be chosen according to each EF species.

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Section: Biochemical Analysissupporting

confidence: 87%

Section: Biochemical Analysissupporting

confidence: 58%

Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

Machado,

Pieracci,

Carmassi

et al. 2023

Horticulturae

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“…The L* value represents brightness and ranges from 0 to 100. Positive a* represents red, negative a* green, positive b* yellow, and negative b* blue, respectively [47].…”

Section: Color Measurementmentioning

confidence: 99%

Improvement of Hot Air Dried Bitter Gourd (Momordica charantia L.) Product Quality: Optimization of Drying and Blanching Process by Experimental Design

Ozsan Kilic,

Boyar,

Gungor

et al. 2023

Agriculture

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Bitter gourd (Momordica charantia L.) is a plant species belonging to the Cucurbitaceae family, growing in tropical regions and containing health-promoting beneficial compounds. In the current study, bitter gourds prepared for drying were sliced in three different thicknesses (6, 8 and 10 mm) and dried in a hot-air dryer at three different temperatures (60, 70 and 80 °C) to preserve their medicinal efficacy. In the experiments, the samples were subjected to blanching at 93.5 °C and 2% salt water for 0, 2.5 and 5 min, and drying processes were conducted. After the drying process, drying time, total color change (∆E), total phenolic content (TPC), total antioxidant activity (TAA), and vitamin C properties were examined. The highest levels of TPC and TAA were found at lower drying air temperatures (DATs), and while these values increased with longer blanching times at lower DATs, they decreased with longer blanching times at higher DATs. According to the different drying temperatures used, it was discovered that the total color change peaked at 70 °C and that vitamin C levels declined as DAT rose. The optimal drying conditions for the 3D response surface methodology include 60 °C DAT, a slice thickness of 10 mm, and without blanching to maximize TPC, TAA and vitamin C content and minimize drying time and ∆E.

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“…Fresh samples were kept in an oven at 105 • C for 24 h to determine their moisture content [20]. Water activity was measured by using a water activity meter (AquaLab 4TE Decagon Devices, Washington, DC, USA) [21].…”

Section: Moisture Content and Water Activitymentioning

confidence: 99%

Effects of Different Osmotic Pre-Treatments on the Drying Characteristics, Modeling and Physicochemical Properties of Momordica charantia L. Slices

Ozsan Kilic,

Boyar,

Dincer

et al. 2023

Agriculture

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A significant vegetable in the Cucurbitaceae family, the bitter gourd (Momordica charantia L.) is widely recognized for its beneficial health properties, including anti-diabetic, anti-carcinogenic, anti-inflammatory, anti-ulcer, antiviral activities. With a total of three Brix values (50, 60, and 70) and three different dipping times (10, 20, and 30 h), the goal of the current study was to identify the proper sugar and grape molasses solutions (pekmez) and dipping times for osmotic pre-treatments of bitter gourd samples to make it sweet and widely consumed. In the present study, mathematical modeling of drying processes, moisture content and water activity, total color changes, total phenolic content-antioxidant activity, and carotenoid contents were assessed. As a result of 13 different mathematical modeling tests, “Diffusion Approach”, “Logarithmic” and “Midilli et al.” models were the best models, giving the highest R2 and lowest X2-RMSE values. There were samples that were dipped at 50 °Brix grape molasses, which decreased below the 10% wet basis (w.b.) limit in the shortest time with 180 min, in a 10 h dipping time. The samples were dipped in 60 °Brix sugar, which fell below the same limit in the shortest time with 135 and 165 min, respectively, at 20 and 30 h dipping times. The highest total phenolic and carotenoid contents were found in 30 h dipping time in 60 °Brix grape molasses with 8296.87 mg/kg and 10 h dipping time in 50 °Brix sugar solutions with 89.22 mg/kg, respectively. While the phenolic content was higher in all samples dipped in grape molasses, the carotenoid content was higher in all samples dipped in sugar, which was one of the most important results of the study.

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Investigation of Color and Bioactive Compounds of Different Colors from Pansy (Viola × wittrockiana Gams.) Dried in Hot Air Dryer

Cited by 4 publications

References 51 publications

Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

Effect of Drying Post-Harvest on the Nutritional Compounds of Edible Flowers

Improvement of Hot Air Dried Bitter Gourd (Momordica charantia L.) Product Quality: Optimization of Drying and Blanching Process by Experimental Design

Effects of Different Osmotic Pre-Treatments on the Drying Characteristics, Modeling and Physicochemical Properties of Momordica charantia L. Slices

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