Phenolic composition and antioxidant activities of thirteen<i>Eucalyptus</i>species cultivated in North East of Tunisia

Limam, Hajer; Yosra, Ezzine; Tammar, Sonia; Ksibi, Nour; Selmi, Sawsen; Re, G. Del; Ksouri, Riadh; Msaâda, Kamel

doi:10.1080/11263504.2020.1762791

Cited by 10 publications

(6 citation statements)

References 48 publications

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“…The antioxidant potential in the elimination of DPPH free radicals from E. saligna leaf extracts evidenced in this study is satisfactory and is in accordance with the activity of ascorbic acid and eucalyptus (E. urophylla and E. grandis) extract reported by Li et al 2020, whose IC50 values were 0.043 and 0.139 mg.mL -1 respectively. Still, the antioxidant activity of the extracts obtained in this work corroborates the study by Limam et al (2020), which obtained an IC50 between 0.0051 to 0.0216 mg.mL -1 for methanol extracts from leaves of different eucalyptus species and also reported the correlation between the antioxidant activity of extracts with phenolic content.…”

Section: Resultssupporting

confidence: 91%

“…In 120-180 minutes the extraction rate of flavonoid compounds is reduced (23.31 mgQE.g -1 of dry extract), being significantly different from previous times. Limam et al (2020) in his study evaluated the phenolic content of 13 eucalyptus species through conventional extraction and obtained levels between 16.59 and 122.38 mgGAE.g -1 for phenolic compounds, and between 13.48 and 118.59 mgQE.g -1 for flavonoids, according to the species studied. These data are not close to those found in this study, since the extraction technique using pressurized liquids aims to maximize the extraction of these compounds in a shorter time and reduce the generation of waste.…”

Section: Resultsmentioning

confidence: 99%

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Antioxidant and Antimicrobial Properties of Eucalyptus Leaf Extract Obtained Using Pressurized Ethanol / Propriedades Antioxidantes E Antimicrobianas Do Extrato De Folhas De Eucalipto Obtidos Com Etanol Pressurizado

Fischer

Gowzdz

Feltes

et al. 2020

BJD

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Eucalyptus leaves are a secondary product of wood production. The pressurized liquid extraction (PLE) technique is an attractive process due to its advantages. The objective of this work was to obtain extracts of Eucalyptus saligna leaves using the PLE technique, and to characterize different extraction time fractions in relation to bioactive compounds and antioxidant and antimicrobial activities. The extraction of E. saligna leaves was carried out in a jacketed extractor at 40 °C, pressure of 10.4 MPa, with a solvent flow of 2.5 mL.min-1 , using 95% ethanol. The system remained pressurized for 30 minutes in static extraction, followed by 180 minutes in dynamic extraction. The levels of total phenols, flavonoids, antioxidant activity and antimicrobial potential against Staphylococcus aureus and Escherichia coli were evaluated. The extraction showed an overall yield of 12.3% after 180 minutes. The total concentrations of phenols and flavonoids were 618.57 mgGAE.g-1 and 160.28 mgQE.g-1 respectively. The extracts showed good antioxidant and antimicrobial potential, with IC50 between 0.016 and 0.043 mg.mL-1 , and MIC against S. aureus and E. coli between 0.313 and 1.25 mg.mL-1. PLE demonstrated efficiency in obtaining extracts of E. saligna leaves with bioactive properties.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Antioxidant and Antimicrobial Properties of Eucalyptus Leaf Extract Obtained Using Pressurized Ethanol / Propriedades Antioxidantes E Antimicrobianas Do Extrato De Folhas De Eucalipto Obtidos Com Etanol Pressurizado

Fischer

Gowzdz

Feltes

et al. 2020

BJD

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“…The total phenolic content in T. hemsleyanum root extracts was determined by Folin-Ciocalteu assay with gallic acid as the standard compound and the corresponding standard absorbance curve constructed for gallic acid (Limam et al, 2021;Chilanti et al, 2021). The content of phenolic compounds in the extract was expressed as Gallic Acid Equivalent (GAE) per gram of the sample (mg GAE/g).…”

Section: Determination Of Total Polyphenolics Contentmentioning

confidence: 99%

Tetrastigma hemsleyanum Diels et Gilg Roots from Different Origins: Pharmacognostical Identification, Content Determination of Functional Composition and in vitro Antioxidant Activity

Li¹,

Ge²,

Zheng³

et al. 2023

American Journal of Biochemistry and Biotechnology

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Tetrastigma hemsleyanum Diels et Gilg (T. hemsleyanum) is a unique and rare Chinese medicinal herb mainly distributed in the south of the Yangtze River in China. In the present study, T. hemsleyanum roots from seven different sites in the south of the Yangtze River (Guangxi [Baise, Guilin, and Hechi], Hunan [Fenghuang], and Zhejiang [Hangzhou, Taizhou, and Wenzhou] provinces) were collected, and differences in the macroscopic and microscopic appearance of the roots, content of their active ingredients, and antioxidant activity of the root extracts were analyzed. The Pearson correlation coefficient was used to analyze the correlation between the antioxidant activity and the total flavonoids and total polyphenols contents of T. hemsleyanum roots. The results of macroscopic and microscopic root appearance indicated that T. hemsleyanum roots from different sites could be clearly differentiated based on size and epidermal characteristics, the color of dry root powder, and the shape and arrangement of the root canal. The results of content determination showed no significant differences (P>0.05) between the contents of flavonoids, polyphenols, rutin, and catechin in T. hemsleyanum roots from Guilin, Guangxi, and those from Zhejiang and Hunan. However, the contents of quercetin and kaempferol showed a significant difference (P<0.01) between T. hemsleyanum roots from Guilin, Guangxi, and those from Zhejiang, Hunan, and Guangxi (Baise and Hechi). Furthermore, the root extracts of T. hemsleyanum showed a high antioxidant activity ranging from 2.254±0.240 to 14.655±4.528 mg ascorbic acid equivalent/g sample. Pearson correlation analysis showed that the antioxidant activity of T. hemsleyanum roots had a higher correlation with the total flavonoids content than with the total polyphenols content. The results of this study provided a reference for the quality evaluation of T. hemsleyanum from different origins and provided technical support for subsequent resource development.

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“…Regarding the analysis of the anthocyanin content, the values obtained with methanol and ethanol were the highest. This is because methanol and ethanol are solvents with higher polarity, and anthocyanins containing a number of polar bonds, particularly the oxonium group, are more soluble in highly polar solvents [41].…”

Section: Extract Composition Analysismentioning

confidence: 99%

“…The variations obtained for the phenolic composition are in agreement with other similar studies. Limam et al [41] determined the chemical composition and antioxidant activity of thirteen species of Eucalyptus and found total phenols content varied significantly among species. Lima et al [5] also reported differences in the composition and antioxidant properties of eleven Eucalyptus species with ethanol/water Soxhlet extractions.…”

Section: Extract Composition Analysismentioning

confidence: 99%

Anthocyanins, Phenolic Compounds, and Antioxidants from Extractions of Six Eucalyptus Species

et al. 2021

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The leaves of Eucalyptus have multiple biological activities such as antimicrobial, antiseptic, antioxidant, and antifungal. A Soxhlet extraction, SLE, and HD were used to obtain extracts from the leaves of six Eucalyptus species, E. globulus, E. oblicua, E. pavaflora, E. camaldulensis, E. viminalis, and E. nitens, and to study their antioxidant capacity. Solvents such as acetone, dichloromethane, ethanol, hexane, methanol, and water were used to study how polarity influences extraction yields. The SLE method achieved higher or similar yields, depending on the species and its composition, than the Soxlet method at a temperature of 50 °C. The highest yields were obtained with E. viminalis with methanol (42.5 wt.%), the highest phenolic content was obtained with E. nitens with methanol (124.17 mg GAE/g of extract), and the highest anthocyanin levels obtained were with E. nitens with hexane (5.05 mg CC/g of extract). E. nitens obtained almost five times more phenolic content than E. globulus; therefore, it is the most promising species. The high content of the compounds analysed confirm the good potential of these species to obtain value-added compounds. Our results demonstrate that the differences in the extract contents depend on the polarity of the solvents used. In addition, the use of these species will reduce the residue in the forest, which is greatly beneficial.

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Phenolic composition and antioxidant activities of thirteenEucalyptusspecies cultivated in North East of Tunisia

Cited by 10 publications

References 48 publications

Antioxidant and Antimicrobial Properties of Eucalyptus Leaf Extract Obtained Using Pressurized Ethanol / Propriedades Antioxidantes E Antimicrobianas Do Extrato De Folhas De Eucalipto Obtidos Com Etanol Pressurizado

Antioxidant and Antimicrobial Properties of Eucalyptus Leaf Extract Obtained Using Pressurized Ethanol / Propriedades Antioxidantes E Antimicrobianas Do Extrato De Folhas De Eucalipto Obtidos Com Etanol Pressurizado

Tetrastigma hemsleyanum Diels et Gilg Roots from Different Origins: Pharmacognostical Identification, Content Determination of Functional Composition and in vitro Antioxidant Activity

Anthocyanins, Phenolic Compounds, and Antioxidants from Extractions of Six Eucalyptus Species

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