Heartwood extractives from the Amazonian trees Dipteryx odorata, Hymenaea courbaril, and Astronium lecointei and their antioxidant activities

Imai, Takanori; Inoue, Sousuke; Ohdaira, Naomi; Matsushita, Yasuyuki; Suzuki, Rie; Sakurai, Mariko; Jesus, José Manoel Henriques de; Ozaki, Salete Kiyoka; Finger, Zenésio; Fukushima, Kazuhiko

doi:10.1007/s10086-008-0975-3

Cited by 20 publications

(12 citation statements)

References 24 publications

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“…There are resistant to decay fungi [19], insects, and dimensional changes. This is due to extractants that have a biocidal effect, such as coumarins, flavonoids, and tannins, and a hydrophobic effect, such as fats, oils, and waxes [25,26]. Giraldo et al [27] declare that morphology, together with differences in the inorganic constituents, significantly affects the combustion process of wood.…”

Section: Introductionmentioning

confidence: 99%

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

et al. 2020

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The article considers the granulometric analysis of selected samples of tropical wood dust from cumaru (Dipteryx odorata), padauk (Pterocarpus soyauxii), ebony (Diospyros crassiflora), and marblewood (Marmaroxylon racemosum) using a Makita 9556CR 1400 W grinder and K36 sandpaper, for the purpose of selecting the percentages of the various fractions (<63; 63; 71; 200; 315; 500 μm) of wood dust samples. Tropical wood dust samples were made using a hand orbital sander Makita 9556CR 1400 W, and sized using the automatic mesh vibratory sieve machine Retsch AS 200 control. Most dust particles (between 50–79%) from all wood samples were under 100 μm in size. This higher percentage is associated with the risk of inhaling the dust, causing damage to the respiratory system, and the risk of a dust-air explosive mixture. Results of granulometric fractions contribution of tropical woods sanding dust were similar. Ignition temperature was changed by particle sizes, and decreased with a decrease in particle sizes. We found that marblewood has the highest minimum ignition temperature (400–420 °C), and padauk has the lowest (370–390 °C).

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Section: Introductionmentioning

confidence: 99%

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

et al. 2020

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“…Flavonoids are recognized as antioxidant agents and the phytochemical investigation of FABU led to the isolation of the compounds identified as liquiritigenin (1), guibourtinidol (2) and fisetinidol (3). 6 These flavonoids presented antioxidant activity, according to Gai et al 23 Sobeh et al 24 and Imai et al 25 In the model of oxidative stress evaluation by the method of H 2 DCFDA, FABU was shown to inhibit ROS production by LPS-stimulated cells. Although some studies use H 2 DCFDA to specifically measure H 2 O 2 , oxidation of H 2 DCF to DCF can be induced by various ROS, including hydroxyl and nitrogen dioxide.…”

Section: Discussionmentioning

confidence: 94%

Antioxidant and Anti-inflammatory Activities of Bauhinia ungulata L. (Fabaceae) on LPS-Stimulated RAW 264.7 Cells

Rodrigues¹,

Yaochite²,

Braga³

et al. 2019

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The genus Bauhinia (family Fabaceae) is widely distributed worldwide and is frequently used in folk medicine-related practices. For instance, leaves, stems and roots are employed for the treatment of diabetes mellitus, inflammatory processes, infections and pain. 1 In vitro and in vivo studies have suggested that the therapeutic properties of the plant are mostly due to the presence of flavonoids. 2 Bauhinia ungulata L, a Brazilian native species, is popularly known as "pata-de-vaca", 3 and can be found in various regions of the country. The popular use of this plant in Brazil originates mainly from its hypoglycemic properties. 4 Phytochemical analysis of leaves of B. ungulata L. revealed the presence of quercetin, quercetin arabinofuranoside, quercitrin and the alkaloids, harmane Antioxidant and Anti-inflammatory Activities of Bauhinia ungulata L. (Fabaceae) on LPS-Stimulated RAW 264.7 Cells ABSTRACT Objective: The present study aimed to investigate the antioxidant, immunomodulatory and antimicrobial activities of Bauhinia ungulata L. Method: A flavonoid-rich fraction was obtained from the Bauhinia ungulata L stem, called the ethyl acetate fraction of Bauhinia ungulata (FABU). The total antioxidant capacity of the FABU was determined through the phosphomolibdenium reduction method. For the evaluation of its antioxidant activity on a cell culture model, LPS-stimulated RAW 264.7 cells were treated with different concentrations of FABU and the reactive oxygen species (ROS), nitric oxide (NO), hydrogen peroxide (H 2 O 2) and thiobarbituric acid reactive substances (TBARS) production levels were measured. For the analysis of its immunomodulatory capacity, TNF-α, TGF-β and IL-10 levels were determined in the culture supernatant. In order to determinate the antimicrobial activity of FABU, antifungal and antibacterial susceptibility testing was performed against Candida albicans, methicillinsensitive Staphylococcus aureus, methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa strains. Result: The FABU demonstrated neither significant antimicrobial activity nor immunodulatory capacity; on the other hand, its potential antioxidant activity was demonstrated by the phosphomolibdenium reduction assay. Also, FABU treatment inhibited the ROS, NO, H 2 O 2 and TBARS levels in the supernatant of LPS-stimulated cells. Conclusion: A significant reduction in the amount of reactive oxygen and nitrogen species (RONS) was observed, in addition to lipid peroxidation inhibition. Our data suggest that the FABU is a natural antioxidant complex that may interfere in the cascade of cell damage caused by free radicals and a promising potential drug in chronic disease models in which immunopathogenicity involves high levels of RONS.

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“…ungulata stem wood. The structures of known compounds ( 2 – 14 ) were identified as 2′‐hydroxy‐3,5‐dimethoxybibenzyl ( 2 ), liquiritigenin ( 3 ), guibourtinidol ( 4 ), fisetinidol ( 5 ), taraxerol ( 6 ), betulinic acid ( 7 ), taraxerone ( 8 ), glutinol ( 9 ), a mixture of sitosterol ( 10 ) and stigmasterol ( 11 ), pacharin ( 12 ), naringenin ( 13 ) and eriodictyol ( 14 ) on basis of spectral data, involving mainly 1D and 2D 1 H‐ and 13 C‐NMR spectra and comparison with literature values ( Fig. ).…”

Section: Resultsmentioning

confidence: 99%

New Cytotoxic Bibenzyl and Other Constituents from Bauhinia ungulata L. (Fabaceae)

Sousa

Carvalho

Silva

et al. 2016

Chemistry & Biodiversity

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A new bibenzyl, 2'-hydroxy-3,5-dimethoxy-4-methylbibenzyl (1) and four known compounds identified as 2'-hydroxy-3,5-dimethoxybibenzyl (2), liquiritigenin (3), guibourtinidol (4) and fisetinidol (5) were isolated from the roots of Bauhinia ungulata L. Phytochemical investigations of the stems of B. ungulata led to the isolation of the known compounds identified as liquiritigenin (3), guibourtinidol (4), fisetinidol (5), taraxerol (6), betulinic acid (7), taraxerone (8), glutinol (9), a mixture of sitosterol (10) and stigmasterol (11), pacharin (12), naringenin (13) and eriodictyol (14). The structures of these compounds were elucidated on the basis of their spectral data (IR, MS, 1D- and 2D-NMR). The cytotoxicity of the bibenzyl 1 has been evaluated against four human cancer cell lines, showing the IC values of 4.3 and 6.5 μg ml against pro-myelocytic leukemia (HL-60) and cervical adenocarcinoma (HEP-2) cell lines, respectively. This article also registers for the first time the C-NMR data of the known bibenzyl 2.

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Heartwood extractives from the Amazonian trees Dipteryx odorata, Hymenaea courbaril, and Astronium lecointei and their antioxidant activities

Cited by 20 publications

References 24 publications

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

Antioxidant and Anti-inflammatory Activities of Bauhinia ungulata L. (Fabaceae) on LPS-Stimulated RAW 264.7 Cells

New Cytotoxic Bibenzyl and Other Constituents from Bauhinia ungulata L. (Fabaceae)

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