Subcritical water extraction of horse chestnut (Aesculus hippocastanum) tree parts

Gagić, Tanja; Knez, Željko; Škerget, Mojca

doi:10.2298/jsc201111013g

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…The increase in antioxidant activity with temperature and reaction time was also reported by Jokić et al [36], where the maximum antioxidant activity of cocoa shell extract was determined at 220 • C and 75 min (91.69%). Similarly, high antioxidant activity (90.54%) was determined for the extract of chestnut seed shells obtained under subcritical water conditions (250 • C, 30 min), which was significantly higher than that of the extracts of chestnut seeds (54.15%) and chestnut leaves (40.39%) [38].…”

Section: The Antioxidant Activity Of Extractsmentioning

confidence: 84%

“…The biodegradable foam thus produced was a promising material that could take the place of plastic products in the future [5]. Gagić et al also reported that the amount of carbohydrates (87.22 mg TCH/g shells) extracted from the shells of chestnut seeds was the highest at 200 • C and 15 min [38].…”

Section: Total Carbohydrates Contentmentioning

confidence: 92%

“…A slightly higher antioxidant activity was observed in the extracts (31.98% walnut shells and 7.38% pistachio shells) obtained at 150 • C and the longest reaction time (60 min). At higher temperatures (250 • C and 300 • C) and an extension of the reaction time to 30 or 60 min, the hydrolysis of the phenolic glycosides probably took place and phenolic aglycones were formed in the extracts, which have a higher antioxidant activity than phenolic glycosides [38].…”

Section: Total Phenols Contentmentioning

confidence: 99%

“…In previous studies, various valuable components (methylxanthines, antioxidants, phenols) were separated from cocoa [36], chestnut [37], horse chestnut [38], peanut [39] and pecan [40] shells using subcritical water. However, there is a lack of studies using subcritical water for the extraction and/or decomposition of pistachio and walnut shells into valuable components.…”

Section: Introductionmentioning

confidence: 99%

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The Conversion of Pistachio and Walnut Shell Waste into Valuable Components with Subcritical Water

Čolnik,

Irgolič,

Perva

et al. 2024

Processes

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Pistachio and walnut shells accumulate in large quantities as waste during food processing and represent a promising lignocellulosic biomass for the extraction of valuable components. Subcritical water technology was used as an environmentally friendly technique to study the extraction of active ingredients and other valuable degradation products from walnut and pistachio waste. Subcritical water extraction (SWE) was carried out under different process conditions (temperature (150–300 °C) and short reaction times (15–60 min)) and compared with conventional extraction using different organic solvents (acetone, 50% acetone and ethanol). The extracts obtained from pistachio and walnut shell waste are rich in various bioactive and valuable components. The highest contents of total phenols (127.08 mg GA/g extract at 300 °C for 15 min, from walnut shells), total flavonoids (10.18 mg QU/g extract at 200 °C for 60 min, from pistachio shells), total carbohydrates (602.14 mg TCH/g extract at 200 °C for 60 min, from walnut shells) and antioxidant activity (91% at 300 °C, for 60 min, from pistachio shells) were determined when the extracts were obtained via subcritical water. High contents of total phenols (up to 86.17 mg GA/g extract) were also determined in the conventional extracts obtained with ethanol. Using the HPLC method, sugars and their valuable derivatives were determined in the extracts, with glucose, fructose, furfurals (5-hydroxymethylfurfural (5-HMF) and furfural) and levulinic acid being the most abundant in the extracts obtained by subcritical water. The results show that subcritical water technology enables better exploitation of biowaste materials than conventional extraction methods with organic solvents, as it provides a higher yields of bioactive components such as phenolic compounds and thus extracts with high antioxidant activity, while at the same time producing degradation products that are valuable secondary raw materials.

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Section: The Antioxidant Activity Of Extractsmentioning

confidence: 84%

Section: Total Carbohydrates Contentmentioning

confidence: 92%

Section: Total Phenols Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Conversion of Pistachio and Walnut Shell Waste into Valuable Components with Subcritical Water

Čolnik,

Irgolič,

Perva

et al. 2024

Processes

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“…The presence of polyphenols in the leaves, seeds, flowers, and bark of horse chestnut has been reported in the literature but not in red horse chestnut because it is a less well-known species. According to the literature, the content of polyphenols is: in horse chestnuts leaves (7.81–24.48 mg/g FW) [ 11 ], seeds (24.24–70.40 mg/g FW) [ 12 ], flowers (8.17 mg/g) [ 13 ], and bark (363.58 mg/g FW) [ 14 ]. For medicinal purposes, fruits, seeds, and cortex are used.…”

Section: Introductionmentioning

confidence: 99%

Red Horse Chestnut and Horse Chestnut Flowers and Leaves: A Potential and Powerful Source of Polyphenols with High Antioxidant Capacity

et al. 2022

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Aesculus flowers and leaves are an excellent source of bioactive compounds, including flavanols, phenolic acids, and anthocyanins, and the leaves also contain antioxidant carotenoids and chlorophylls. The aim of this study was to analyse and compare the amounts of bioactive compounds present in Aesculus hippocastanum and Aesculus × carnea flowers and leaves over two years. These two species from six independent locations (parks and green areas) located in Warsaw were assessed in this study. The dry matter by the scale method and polyphenol, carotenoid, and chlorophyll content by the HPLC method of the flowers and leaves was evaluated. Red horse chestnut flowers contained significantly more total carotenoids (40.6 µg/g FW) and chlorophylls (36.9 µg/g FW) than horse chestnut flowers, and red horse chestnut flowers contained higher levels of anthocyanins (5.41 µg/g FW) than other species. We observed that horse chestnut flowers were characterized by a higher total polyphenols concentration (9.45 µg/g FW) compared to red horse chestnut flowers. In addition, the analysis of leaves showed that all quality parameters were higher in red horse chestnut species. Five individual anthocyanins were identified in both species’ flowers, but a higher concentration was found in red horse chestnut flowers, and pelargonidin-3-O-glucoside was the predominant form among a pool of total anthocyanins. In both experimental years, leaves (109.25 mMol/100 g FW and 112.0 mMol/100 g FW) were characterized by a higher antioxidant activity than flowers (27.0 mMol/100 g FW and 27.5 mMol/100 g FW).

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Pilot Scale Tannin Extraction from Chestnut Wood Waste Using Hydrodynamic Cavitation

Meneguzzo

Albanese

Faraloni

et al. 2023

Lecture Notes in Networks and Systems

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Tannins, extracted from various plant sources, are worldwide commodities used in several different elds, including leather manufacturing and the production of bio-based adhesives, with emerging use in technical, environmental, food and feed sectors, pharmacology. Due to increasing market demand, few emerging techniques were proposed besides the usual hot water extraction usually performed under pressurized conditions. For the rst time, hydrodynamic cavitation, an emerging and straightforwardly scalable green extraction technique, was applied to the extraction of tannins from chestnut wood waste in water only and at room pressure, without any pretreatment of the raw material. Promising performances were shown based on tests carried out from room temperature up to 100°C. Extraction rates close to 300 mg of tannin per gram of chestnut wood material (dry basis) were observed, as well as high levels of the antioxidant activity of the obtained extract (IC50 about 10 µg of chestnut wood waste, or 2.45 µg of extracted tannin, per mL of solution). Speci c energy consumption was less than 80 Wh per mg of tannin extracted from 1 g of chestnut wood material. The proposed technique would be suitable for both small-scale and industrial extraction facilities.

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Subcritical water extraction of horse chestnut (Aesculus hippocastanum) tree parts

Cited by 7 publications

References 13 publications

The Conversion of Pistachio and Walnut Shell Waste into Valuable Components with Subcritical Water

The Conversion of Pistachio and Walnut Shell Waste into Valuable Components with Subcritical Water

Red Horse Chestnut and Horse Chestnut Flowers and Leaves: A Potential and Powerful Source of Polyphenols with High Antioxidant Capacity

Pilot Scale Tannin Extraction from Chestnut Wood Waste Using Hydrodynamic Cavitation

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