Black locust flowers: antioxidant extraction kinetics, reducing capacity, mineral composition, and antioxidant activity

Boskov, Ivana A.; Gajić, Ivana; Spalović, Boban R.; Štrbac, Nada

doi:10.1080/00986445.2021.1949304

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Furthermore, catechin is known for its anti-inflammatory activity and as a protective compound against cardiovascular diseases and cancer [ 81 , 82 , 83 ]. The study of Boskov et al [ 84 ] revealed a high concentration of catechin hydrate in black locust flower aqueous extract (832 mg/100 g DW) and (12 mg/100 g DW) in the 50% ( v / v ) methanol extract. Marinas et al [ 23 ] recorded catechin (0.9 µg/mL) in the black locust leaf and epicatechin (0.24 µg/mL) and catechin (0.13 µg/mL) in the 70% ethanol seed extract of R. pseudoacacia .…”

Section: Resultsmentioning

confidence: 99%

Invasive Alien Species as a Potential Source of Phytopharmaceuticals: Phenolic Composition and Antimicrobial and Cytotoxic Activity of Robinia pseudoacacia L. Leaf and Flower Extracts

Uzelac

Sladonja

Šola

et al. 2023

Plants

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Black locust (Robinia pseudoacacia L.), an invasive tree in Europe, commonly known for its negative impact on biodiversity, is a rich source of phenolic compounds recognized in traditional medicine. Since the metabolite profile depends on the environment and climate, this study aimed to provide the first LC-MS phytochemical screening of the black locust from the Istria region (Croatia). The compounds were extracted from leaves and flowers with 70% ethanol and 80% methanol. Total phenolics (TP) and flavonoids (TF), as well as antioxidant capacity (AC) measured by ABTS (17.49–146.41 mg TE/g DW), DPPH (24.67–118.49 mg TE/g DW), and FRAP (7.38–77.53 mg TE/g DW) assays, were higher in leaf than in flower extracts. Higher TP and total non-flavonoid (TNF) values were displayed in ethanolic than in methanolic extracts. In total, 64 compounds were identified, of which flavonols (20) and hydroxycinnamic acid derivatives (15) were the most represented. Flavanols such as catechin dominated in leaf extracts, followed by flavonols, with kaempferol glucuronyl rhamnosyl hexosides as the main compound, respectively. Flower extracts had the highest share of flavones, followed by ellagitannins, with luteolin dirhamnosyl hexosides and vescalagin, respectively, being predominant. The extracts had good quorum sensing, biofilm formation prevention, and eradicating capacity. The results provided new insights into the phytochemical properties of R. pseudoacacia as the first step toward its potential pharmaceutical use.

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Section: Resultsmentioning

confidence: 99%

Invasive Alien Species as a Potential Source of Phytopharmaceuticals: Phenolic Composition and Antimicrobial and Cytotoxic Activity of Robinia pseudoacacia L. Leaf and Flower Extracts

Uzelac

Sladonja

Šola

et al. 2023

Plants

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“…These methods are easy because they require unsophisticated equipment and recyclable solvents. Commonly employed solvents for extracting bioactive compounds from medicinal herbs are acetone, ethanol, ethyl acetate, methanol, and water [14][15][16]. Solvent selection is crucial because it affects the selectivity and recovery of the desired compound [17].…”

Section: Resultsmentioning

confidence: 99%

Extraction of Coumarin Mixture from Tamanu Oil using Food-Grade

Safrina Hapsari,

Hakun Wirawasista Aparamarta,

Nurul Jadid

et al. 2024

ARFMTS

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Indonesia’s flora and fauna are divided into four significant ecosystems: freshwater (rivers and lakes), marine, semi-terrestrial (mangrove and riparian), and terrestrial. Tamanu (Calophyllum inophyllum) is a member of the mangrove-associated plant species belonging to the mangosteen family. It is also known as Alexandrian laurel, bintangur (Malaysia), Borneo-mahogany, polanga (India), and nyamplung (Indonesia). The tamanu seed can produce oil with a 60-75% yield. It is applicable to treat various skin problems, including eczema, psoriasis, herpes, acne, haemorrhoids, and certain allergies. It is also beneficial as an antimicrobial, anticancer, anti-HIV, anti-inflammation, and anticoagulant agent. This is because tamanu oil contains bioactive compounds named coumarin. Previous works isolated coumarins with toxic solvents and using methods that are hard to scale up. Therefore, this study aims to know the best concentration of food-grade ethanol, the number of stages, and the solvent system to extract crude coumarin mixtures from tamanu oil by batchwise solvent extraction. The free fatty acid and triglyceride removal was also studied. The initial contents of free fatty acid, coumarin mixture, and triglyceride in tamanu oil were 25.87%, 11.96%, and 51.16%, respectively. Tamanu oil was extracted simultaneously with binary solvents (n-hexane and 70%/80%/90% aqueous food-grade ethanol) and a single solvent (96% food-grade ethanol). Each fraction was analysed by Thin Layer Chromatography (TLC) and High Temperature-Gas Chromatography (HT-GC). The best result was obtained using 80% aqueous food-grade ethanol, eight extraction stages, and a binary solvent system, which produced 48.64±6.57% purity and 88.68±1.38% recovery of coumarin mixture. Moreover, it was found that the method removed 64.15% of free fatty acid and 99.96% of triglyceride from the crude tamanu oil after eight stages of batchwise extraction.

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Impact of solvent type, solvent-water concentration, and number of stages on the extraction of coumarin mixture from tamanu (Calophyllum inophyllum) oil and its antioxidant activity

Hapsari

Jadid

Aparamarta

et al. 2023

Arabian Journal of Chemistry

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Black locust flowers: antioxidant extraction kinetics, reducing capacity, mineral composition, and antioxidant activity

Cited by 5 publications

References 26 publications

Invasive Alien Species as a Potential Source of Phytopharmaceuticals: Phenolic Composition and Antimicrobial and Cytotoxic Activity of Robinia pseudoacacia L. Leaf and Flower Extracts

Invasive Alien Species as a Potential Source of Phytopharmaceuticals: Phenolic Composition and Antimicrobial and Cytotoxic Activity of Robinia pseudoacacia L. Leaf and Flower Extracts

Extraction of Coumarin Mixture from Tamanu Oil using Food-Grade

Impact of solvent type, solvent-water concentration, and number of stages on the extraction of coumarin mixture from tamanu (Calophyllum inophyllum) oil and its antioxidant activity

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