A glycosylated β-Sitosterol, isolated from Tacinga inamoena (Cactaceae), enhances the antibacterial activity of conventional antibiotics

Silva, Joanda Paolla Raimundo e; Policarpo, Iamara da Silva; Chaves, Thiago Pereira; Coutinho, Henrique Douglas Melo; Alves, Harley da Silva

doi:10.1016/j.sajb.2020.07.017

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Hence, these findings match with N-feruloyl-tyramine (Al-Taweel et al, 2012;Ayanlowo et al, 2020). Comparing these results with literature (Forino et al, 2016;Raimundo e Silva et al, 2020), compound C13 eluted first and could be identified as N-trans-feruloyl-tyramine, while compound C14, which eluted second, could be identified as N-cis-feruloyl-tyramine. Compound C13 (Ntrans-feruloyl-tyramine) was also identified in C. diffusa (Vu et al, 2023) methoxytyramine or a methyldopamine moiety (Geng et al, 2017;Kang et al, 2018;Ozturk et al, 2022).…”

Section: Plant Materials and Extractionsupporting

confidence: 59%

Ethnobotanical study and characterization of medicinal plants used by the population of the Kisantu and Mbanza-Ngungu territories, Kongo Central Province (DR Congo)

Kibungu Kembelo

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Section: Plant Materials and Extractionsupporting

confidence: 59%

Ethnobotanical study and characterization of medicinal plants used by the population of the Kisantu and Mbanza-Ngungu territories, Kongo Central Province (DR Congo)

Kibungu Kembelo

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“…The spectrum also reveals signals at δH 4,59 (1H), 4,44 (1H), 4,32 (2H), 4,09 (1H) e 4,00 (2H) that are typical of a glycosidic unit. This is corroborated by the presence of a duplet at δH 5,07 (d; J=7,5 Hz, 1H) that is attributed to H-1'from a glucose unit in beta linkages (Munvera et al, 2021;Raimundo & Silva et al, 2020). (C-5'), 72,1 (C-4'), 79,1 (C-3'), 75,8 (C-8') and 103,0 (C-1') which can attributed to anomeric carbon (Ismaeel et al, 2020).…”

Section: Resultsmentioning

confidence: 74%

Green synthesis of Fe3O4@ZnO-supported Pd nanoparticles for oxidation and hydrogenation reactions in liquid systems

Souto

Razini²,

Kauffmann³

et al. 2022

RSD

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In this work Pd nanoparticles immobilized on a hybrid solid support comprised of Fe3O4 coated by a ZnO layer were synthesized by a green method which makes use of water, a biological substrate from a local plant (Rhamnidium elaeocarpum) and inexpensive Fe3+ and Zn2+ salts. 1H-NMR and 13C-NM revealed β-sitosterol as the main component of the biological substrate. The catalytic support containing Pd nanoparticles was applied in three model solid-liquid catalytic systems, namely: alcohol oxidation, nitrocompound reduction and olefin hydrogenation. For the alcohol oxidation, benzyl alcohol was used as the substrate in a solvent-free condition with high selectivity towards benzaldehyde, and a single sample of the catalyst could be recycled up to 11 times before any loss of activity could be detected. TOF (turnover frequency) as high as 13,686 h-1 for the substrate oxidation was achieved with an average yield rate of 45.4% for formation of benzaldehyde and 81.6% of average substrate conversion after 6 catalytic cycles. For the hydrogenation experiments using cyclohexene and 4-nitrophenol as model substrates, conversion as high as 96% to 4-aminophenol and cyclohexane, respectively, was achieved after 30 minutes of reaction. Furthermore, a single sample of the catalyst could be recycled for up to 17 times for the reduction of 4-nitrophenol, and 21 times in the hydrogenation of cyclohexene. Catalytic recycling for all studied reactions was straightforward after due to the superparamagnetic property of the material, and catalyst isolation after each batch could be rapidly carried out using a Nd magnet. These results suggests that a highly active and stable catalytic system based on Pd nanoparticles supported on a multifunctional solid could be fabricated using green and inexpensive biomass under operationally simple synthesis conditions.

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“…These metabolites may induce the common response of microeukaryotes to biotic and abiotic stresses and contribute to the assembly process of microeukaryotic communities. For instance, β-sitosterol could be used as an antibiotic to enhance the antibacterial activity of microeukaryotes [34]. Gentiopicroside is significantly correlated with the abundance of dominant endophyte genera among different tissues of Gentiana officinalis [35].…”

Section: Discussionmentioning

confidence: 99%

Characteristic metabolites drive the self-assembly of microeukaryotic communities during spontaneous fermentation of icewine

Chen

2023

New Advances in Saccharomyces

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Wine can be regarded as a nutritional source for the human diet. It contains many nutrients such as vitamins and minerals, organic acids, flavonoids, and terpenoids. The varietal aroma of wines originated from the symbionts of the grapes and epiphytic microbiota, which combinedly grew from the sexual reproduction of the plant through seeds or during clonal reproduction. Nowadays, more and more studies focus on the assembly process of epiphytic microbiota and design a synthetic microbial community based on regional characteristics to improve wine quality and biofunctions. This review synthesizes the current concepts on the construction of synthetic microbiota, analyzes the advantages and difficulties in designing a functional yeast community, and lists the practical tools for data processing and model construction. A well-designed yeast community will possess high robustness against environment interference, higher efficiency of fermentation, and higher yield of targeted bioproducts.

show abstract

A glycosylated β-Sitosterol, isolated from Tacinga inamoena (Cactaceae), enhances the antibacterial activity of conventional antibiotics

Cited by 6 publications

References 22 publications

Ethnobotanical study and characterization of medicinal plants used by the population of the Kisantu and Mbanza-Ngungu territories, Kongo Central Province (DR Congo)

Ethnobotanical study and characterization of medicinal plants used by the population of the Kisantu and Mbanza-Ngungu territories, Kongo Central Province (DR Congo)

Green synthesis of Fe3O4@ZnO-supported Pd nanoparticles for oxidation and hydrogenation reactions in liquid systems

Characteristic metabolites drive the self-assembly of microeukaryotic communities during spontaneous fermentation of icewine

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