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  1. Article: Phytochemical compounds and anti-corrosion activity of Veronica rosea

    Ouache, Rachid / Harkat, Hassina / Oulmi, Kafia / Pale, Patrick

    Natural product research. 2019 May 3, v. 33, no. 9

    2019  

    Abstract: The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 1–4 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR ... ...

    Abstract The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 1–4 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR spectral analysis and mass spectroscopy. The adsorption and anticorrosion effects of this extract were investigated towards the corrosion of copper in 1 M HNO3 aqueous by the weight loss technique and potentiodynamic polarization. The results showed that the butanolic extract is a good inhibitor and the inhibition efficiency increases with increasing of concentration of the inhibitor. The adsorption of this extract on the copper specimen surface was spontaneous and obeyed the Langmuir’s adsorption isotherm. Large value of adsorption equilibrium Constant (K ads = 35 L g−1) was obtained. The polarization experiments confirmed the data obtained by gravimetric weight-loss. Tafel plot of polarization curves indicates that the extract acts as a mixed type inhibitor.
    Keywords adsorption ; aerial parts ; chromatography ; copper ; corrosion ; mass spectrometry ; nitric acid ; nuclear magnetic resonance spectroscopy ; phytochemicals ; sorption isotherms ; spectral analysis ; Veronica ; weight loss
    Language English
    Dates of publication 2019-0503
    Size p. 1374-1378.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2018.1474464
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Phytochemical compounds and anti-corrosion activity of Veronica rosea.

    Ouache, Rachid / Harkat, Hassina / Pale, Patrick / Oulmi, Kafia

    Natural product research

    2018  Volume 33, Issue 9, Page(s) 1374–1378

    Abstract: The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 1-4 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR ... ...

    Abstract The aim of this work is the phytochemical study of the butanolic extract of the aerial parts of Veronica rosea. Four compounds 1-4 have been isolated using different chromatographic methods. The structures of these compounds were determined by NMR spectral analysis and mass spectroscopy. The adsorption and anticorrosion effects of this extract were investigated towards the corrosion of copper in 1 M HNO
    MeSH term(s) Adsorption ; Alcohol Oxidoreductases/chemistry ; Copper/chemistry ; Corrosion ; Magnetic Resonance Spectroscopy ; Molecular Structure ; Phytochemicals/chemistry ; Plant Components, Aerial/chemistry ; Plant Extracts/chemistry ; Veronica/chemistry
    Chemical Substances Phytochemicals ; Plant Extracts ; Copper (789U1901C5) ; Alcohol Oxidoreductases (EC 1.1.-) ; butanol dehydrogenase (EC 1.1.1.-)
    Language English
    Publishing date 2018-05-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2018.1474464
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: In vitro photoprotective, hemostatic, anti-inflammatory and antioxidant activities of the species Linaria scariosa Desf

    Mouffouk, Chaima / Mouffouk, Soumia / Oulmi, Kafia / Mouffouk, Sara / Haba, Hamada

    SAAB South African journal of botany. 2020 May, v. 130

    2020  

    Abstract: Recently, plant-derived extracts gained considerable attention as skincare agents, because of their capacity to exert a broad spectrum of biological activities, including their power to absorb ultraviolet radiation, their antioxidant, anti-inflammatory ... ...

    Abstract Recently, plant-derived extracts gained considerable attention as skincare agents, because of their capacity to exert a broad spectrum of biological activities, including their power to absorb ultraviolet radiation, their antioxidant, anti-inflammatory and hemostatic properties. In this context, the study focused on the evaluation of in vitro pharmacological activities of the methanolic extract obtained from the species Linaria scariosa. The plant is used by the local populations of Aures region (Algeria) for wound healing and its traditional applications will be validated. The quantification of the total phenolic and flavonoid content was performed spectrophotometrically using Folin-Ciocalteu and trichloroaluminum methods. The antioxidant activity was determined by four different assays including ferric reducing antioxidant power, total antioxidant capacity, ferric thiocyanate assay and the antioxidant activity by potentiometric method. Furthemore, the in vitro anti-inflammatory activity was assessed by albumin denaturation method, the photoprotective effect was evaluated by the measurment of sun protection factor (SPF) and the hemostatic activity was carried out by the determination of plasma re-calcification time (PRT). Result of the phytochemical screening from the methanolic extract was found to contain several secondary metabolites known for their biological properties. Moderate contents of polyphenols and flavonoids were estimated. The MeOH extract possessed moderate antioxidant activity for various tested assays and had the ability to inhibit thermally-induced protein denaturation in a dose-dependent manner with a percentage of 40.98% at 500 μg/ml. Moreover, this plant extract significantly shortened the clotting time compared to the control group and had a higher capacity to absorb UV radiations with a sun protection factor estimated at 38.46 ± 0.22. The methanolic extract from L. scariosa could be used in cosmetic formulations and as a skincare agent.
    Keywords Linaria ; albumins ; anti-inflammatory activity ; antioxidant activity ; antioxidants ; chemical constituents of plants ; denaturation ; dose response ; flavonoids ; methanol ; plant extracts ; polyphenols ; protein denaturation ; radiation resistance ; screening ; secondary metabolites ; thiocyanates ; tissue repair ; ultraviolet radiation ; Algeria
    Language English
    Dates of publication 2020-05
    Size p. 383-388.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2126918-X
    ISSN 0254-6299
    ISSN 0254-6299
    DOI 10.1016/j.sajb.2020.01.003
    Database NAL-Catalogue (AGRICOLA)

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