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12 résultats
Acetophenone glycosides from thyme (Thymus vulgaris L.).
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Four acetophenone glycosides were isolated from the butanol-soluble fraction of thyme extracts. Their structures were determined by spectral methods (MS, NMR, and 2D-NMR). Among them, two new compounds, 4-hydroxyacetophenone 4-O-[5-O-(3,
Monoterpenoids and their glycosides from the leaf of thyme.
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From the polar portion of the methanol extract of thyme (leaf of Thymus vulgaris; Labiatae), which has been used as an important stomachic, carminative, a component of prepared cough tea, and a spice, seven monoterpenoid glycosides were isolated together with two known monoterpenoids and three known
Identification of phenolic components in dried spices and influence of irradiation.
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LC-ESI-MS analysis was used for identification of phenolic compounds in the methanolic extracts of commercially available dried oregano, sage and thyme. Rosmarinic acid, apigenin-glucuronide, luteolin-glucuronide, as well as quinic acid were present in all three spices. Whereas in thyme and sage
Phenolic content of some selected Lamiaceous Egyptian medicinal plants: antioxidant potential and ecological friend mosquito-larvicldal.
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Phenol compounds are naturally occurring biologically active compounds existing in all plants had received major medical concern so development in research focused on their extraction, identification and quantification have occurred over the last 25 years; they constitute an important source of
[Phytochemical evaluation of essential oils, medicinal plants and their preparations].
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A surway is presented on the authors' work in the field of volatile oil research. The gas chromatographic method previously used for analysis of essential oils was transformed to capillary gas chromatographic conditions. The method is also suitable for separation of compound-pairs frequently
Antagonistic activity of Thymus vulgaris extracts against Vibrio species isolated from seafoods.
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This study examined the antibacterial activity of Thymus vulgaris on multiple antibiotic resistant (MAR) Vibrio parahaemolyticus and Vibrio fluvialis isolated from shrimps. The ethanol extract of T. vulgaris antibacterial properties was assessed using the agar diffusion method. Survival of test
Topical anti-inflammatory activity of extracts and compounds from Thymus broussonettii.
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The topical anti-inflammatory activity of four extracts from Thymus broussonetii Boiss (Labiatae) leaves, a herbal drug used in Moroccan traditional medicine, has been studied using the croton oil ear test in mice. A bioassay-oriented fractionation revealed that the pharmacological activity is
Interrelation of antioxidant, anticancer and antilieshmania effects of some selected Egyptian plants and their phenolic constituents.
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Medicinal plants are the most potential resource of new therapeutic agents. They are diverse, largely productive, biologically active and chemically unique; among their constituents "polyphenol compounds group" one of the main determinant factors in evaluating the pharmacological potentials i.e.
Thymus algeriensis Bioss & Reut: Relationship of phenolic compounds composition with in vitro/in vivo antioxidant and antibacterial activity
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Thymus algeriensis Bioss & Reut is an Algerian native plant traditionally used for culinary and medicinal purposes. To evaluate the in vivo antioxidant and antimicrobial properties of T. algeriensis, phenolic compounds were extracted using hydromethanolic solutions and administrated to Swiss
Insights into novel anticancer applications for apigenin.
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Flavonoids, naturally occuring derivatives of 2-phenyl-benzo-γ-pyrone, are widespread in plants as coloring substances. Apigenin (4',5,7,-trihydroxyflavone (5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one), molecular formula C₁₅H₁₀O⁵, is a flavonoid present in many fruits and vegetables,
Distribution and biological activities of the flavonoid luteolin.
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Epidemiological evidence suggests that flavonoids may play an important role in the decreased risk of chronic diseases associated with a diet rich in plant-derived foods. Flavonoids are also common constituents of plants used in traditional medicine to treat a wide range of diseases. The purpose of
Evaluation of the quality of herbal teas by DART/TOF-MS.
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The paper focuses on the optimization, settings and validation of direct analysis in real time coupled with time-of-flight detector when used for the evaluation of the quality of selected herbal teas (fennel, chamomile, nettle, linden, peppermint, thyme, lemon balm, marigold, sage, rose hip and St.
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