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ethyl acetate/čiobrelis
Nuoroda įrašoma į mainų sritį
Puslapis 1 nuo 21 rezultatus
Development of an efficient method for multi residue analysis of 160 pesticides in herbal plant by ethyl acetate hexane mixture with direct injection to GC-MS/MS.
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A simple and efficient multi residue method was developed, for the analysis of 160 pesticides by GC-MS/MS in herbal plants. The developed method employs pesticide residue extraction by EtAC/ n. hexane (6:4) with a cleanup step using florisil/ PSA mixture. The optimized conditions have resulted in
Preliminary study on immunological and behavioural effects of Thymus broussonetii Boiss., an endemic species in Morocco.
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In the present work, we had tried to evaluate the immunotropic and behavioural effects of Thymus broussonetii Boiss. So, we tested the neurostimulant effects of four extracts. This preliminary study allowed to identify both the immunostimulant and the neurotropic antistress effects of the studied
Extraction of betulin, trimyristin, eugenol and carnosic acid using water-organic solvent mixtures.
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A solvent system consisting of ethyl acetate, ethyl alcohol and water, in the volume ratio of 4.5:4.5:1, was developed and used to extract, at room temperature, betulin from white birch bark and antioxidants from spices (rosemary, thyme, sage, and oregano) and white oak chips. In addition, under
The use of TLC-DPPH* test with image processing to study direct antioxidant activity of phenolic acid fractions of selected Lamiaceae family species.
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TLC coupled with 2,2-diphenyl-1-picrylhydrazyl staining was used to analyze phenolic acid fractions of selected Salvia and Thymus species. Documented videoscans were processed by means of an image processing program. This is the first time that free phenolic acids fractions, as well as fractions
Gas chromatography-mass spectrometry analysis of different organic crude extracts from the local medicinal plant of Thymus vulgaris L.
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OBJECTIVE
To isolate and analyze the chemical composition in different crude extracts of from the leaves of locally grown of Thymus vulgaris L (T. vulgaris) by gas chromatography-mass spectrometry (GC-MS).
METHODS
The shade dried leaves powder was extracted with methanol by using Soxhlet extractor.
The effects of thyme volatiles on the induction of DNA damage by the heterocyclic amine IQ and mitomycin C.
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The leafy parts of thyme and its essential oil have been used in foods for its flavour, aroma and preservation for many years. In the present study the genotoxic potential of major compounds of thyme oil, i.e. thymol, carvacrol, and gamma-terpinene and of the methanolic extracts of thyme, were
Modulating effects of thyme and its major ingredients on oxidative DNA damage in human lymphocytes.
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The present study was carried out to investigate the modulating effects of thyme and its major components against the oxidative DNA damage induced by H(2)O(2). The human lymphocytes with thymol, carvacrol, and gamma-terpinene incubated with or without 0.1 mM H(2)O(2) for 30 min at 37 degrees C and
Residual dynamics of thiacloprid in medical herbs marjoram, thyme, and camomile in soil.
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Thiacloprid is a new insecticide of the chloronicotinyl family. To assess its risk after application, residual characteristics of thiacloprid in marjoram, thyme, and camomile and in soil were studied under field conditions. The active ingredient was extracted from the plant material using a mixture
Acetylcholinesterase inhibitory and antioxidant properties of Cyclotrichium niveum, Thymus praecox subsp. caucasicus var. caucasicus, Echinacea purpurea and E. pallida.
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The dichloromethane, ethyl acetate, ethanol, and aqueous extracts of Cyclotrichium niveum (CN) and Thymus praecox subsp. caucasicus var. caucasicus (TP), Echinacea purpurea (EPU), and E. pallida (EPA) along with the essential oils of CN and TP were assessed for their anti-acetylcholinesterase (AChE)
Phenolic composition and antioxidant activity of the different extracts from Thymus longicaulis C Presl. subsp. longicaulis var. longicaulis and T. longicaulis C. Presl. subsp. longicaulis var. subisophyllus growing in Turkey.
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The objectives of the present study were to investigate the phenolic composition and in vitro antioxidant capacities of the infusions and different extracts of two Thymus taxa: Thymus longicaulis C. Presl. subsp. longicaulis var. longicaulis and Thymus longicaulis C. Presl. subsp. longicaulis var.
Antioxidant and antibacterial activity of flavonoid-, polyphenol- and anthocyanin-rich extracts from Thymus kotschyanus boiss & hohen aerial parts.
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The total phenolic and flavonoid contents, antioxidant and antibacterial properties of flavonoid- (water, ethyl acetate and hexane fractions), polyphenol- and anthocyanin-rich extracts of Thymus kotschyanus aerial parts were investigated. All the extracts showed significant amounts of phenolic and
[Anti-tumor effect of ethanol extracts from Thymus quinquecostatus Celak on human leukemia cell line].
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OBJECTIVE
To screen the anti-tumor fraction of ethanol extracts from Thymus quinquecostatus Celak and investigate its anti-tumor effect on human leukemia cell line.
METHODS
Ethyl acetate, n-butanol and acetone fractions were separated from the ethanol extracts of wild Thymus quinquecostatus Celak.
Study on the antinociceptive effects of Thymus broussonetii Boiss extracts in mice and rats.
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In Morocco, Thymus broussonetii is widely used in folk medicine for the treatment of a variety of diseases including gastroenteric and bronchopulmonary disorders and to relieve dolorous process. The antinociceptive effect of the aqueous, butanolic and ethyl acetate extracts of this species was
Study of total phenol, flavonoids contents and phytochemical screening of various leaves crude extracts of locally grown Thymus vulgaris.
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OBJECTIVE
To prepare various crude extracts using different polarities of solvent and to quantitatively evaluate their total phenol, flavonoids contents and phytochemical screening of Thymus vulgaris collected from Al Jabal Al Akhdar, Nizwa, Sultanate of Oman.
METHODS
The leave sample was extracted
Preservation of alpha-tocopherol in sunflower oil by herbs and spices.
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The ability of some commercially available herb and spice extracts to preserve alpha-tocopherol in sunflower oil during heating at 85-105 degrees C was assessed using sunflower oil as a model system. The Rancimat was evaluated for the heating stage and was used throughout as it was shown to be
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