Effect of solvents and extraction methods on the phenolic content, flavonoid content, and antioxidant activity of Bauhinia variegata and Leptadenia reticulata

Vyas, Priya; Braganza, Vincent J.

doi:10.31024/ajpp.2019.5.4.26

Cited by 2 publications

(2 citation statements)

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“…Regarding the total flavonoid content, the determined values (12.69-23.07 mg RUTE/g Extract) were similar to or higher than those recorded for aqueous extracts prepared with the leaves of B. variegata (3.86-18.40 mg RUTE/g Extract) [79]. In contrast, these values can be considered low compared to those determined for aqueous extracts prepared with the leaves of other species of the genus Bauhinia, such as B. vahlii (59 mg RUTE/g Extract) and B. pulchella (221.71 mg RUTE/g Extract) [75,76].…”

Section: Phenolic Compoundssupporting

confidence: 73%

“…These values are lower than those determined for extracts obtained from congeneric species, such as B. vahlii (237 mg GAEq/g) and B. pulchella (201.89 mg GAEq/g) [ 75 , 76 ]. On the other hand, the levels were higher than those determined for extracts of B. forficata (5.81–58.58 mg GAEq/g Extract), B. scandens (47.33 mg GAEq/g Extract), and B. variegata (69.39 mg GAEq/g Extract) [ 77 , 78 , 79 ]. These differences may be attributed not only to the different plant species but also to the type of solvents and extraction methods used, which would favor the obtaining of samples with different levels of phenolic compounds [ 78 , 80 ].…”

Section: Discussionmentioning

confidence: 78%

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Spray-Drying Microencapsulation of Bauhinia ungulata L. var. obtusifolia Aqueous Extract Containing Phenolic Compounds: A Comparative Study Using Different Wall Materials

Remígio,

Greco,

Silva Júnior

et al. 2024

Pharmaceutics

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Species belonging to the Bauhinia genus, usually known as “pata-de-vaca”, are popularly used to treat diabetes. Bauhinia ungulata var. obtusifolia (Ducke) Vaz is among them, of which the leaves are used as a tea for medicinal purposes in the Amazon region. A microencapsulation study of lyophilized aqueous extract from Bauhinia ungulata leaves, which contain phenolic compounds, using five different wall materials (maltodextrin DE 4-7, maltodextrin DE 11-14; β-cyclodextrin; pectin and sodium carboxymethylcellulose) is described in this paper. The microstructure, particle size distribution, thermal behavior, yield, and encapsulation efficiency were investigated and compared using different techniques. Using high-performance liquid chromatography, phenolics, and flavonoids were detected and quantified in the microparticles. The microparticles obtained with a yield and phenolics encapsulation efficiency ranging within 60–83% and 35–57%, respectively, showed a particle size distribution between 1.15 and 5.54 µm, spherical morphology, and a wrinkled surface. Among them, those prepared with sodium carboxymethylcellulose or pectin proved to be the most thermally stable. They had the highest flavonoid content (23.07 and 21.73 mg RUTE/g Extract) and total antioxidant activity by both the DPPH (376.55 and 367.86 µM TEq/g Extract) and ABTS (1085.72 and 1062.32 µM TEq/g Extract) assays. The chromatographic analyses allowed for quantification of the following substances retained by the microparticles, chlorogenic acid (1.74–1.98 mg/g Extract), p-coumaric acid (0.06–0.08 mg/g Extract), rutin (11.2–12.9 mg/g Extract), and isoquercitrin (0.49–0.53 mg/g Extract), compounds which considered to responsible for the antidiabetic property attributed to the species.

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Section: Phenolic Compoundssupporting

confidence: 73%