Güncel Gönderiler: Farmakognozi Anabilim Dalı
Toplam kayıt 594, listelenen: 121-140
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Characterization of volatile constituents of Scaligeria tripartita and studies on the antifungal activity against phytopathogenic fungi
(Elsevier Science BV, 2007)The chemical composition of the essential oils obtained from stems and leaves, fruits and roots of Scaligeria tripartita oil was analyzed by gas chromatography-mass spectrometry. A total of 38 compounds were identified ... -
Analysis of the volatile constituents of Asian Hypericum L. (Clusiaceae, Hyperidoideae) species
(Allured Publ Corp, 2005)Of the 57 species of the economically important genus Hypericum (St. John's Wort; Clusiaceae) occurring in China, only a small percentage have been previously phytochemically investigated. As part of our continuing research ... -
Estrogenic activity of isolated compounds and essential oils of Pimpinella species from turkey, evaluated using a recombinant yeast screen
(Georg Thieme Verlag Kg, 2004)Several plants and plant-derived pure compounds, designated as phytoestrogens, have been reported to cause estrogenic effects. They have been used for alleviation of menopausal symptoms, prevention of osteoporosis, heart ... -
Bioactive constituents from Turkish Pimpinella species
(Wiley-V C H Verlag GMBH, 2005)A new 'phenylpropanoid', 4-(3-methyloxiran-2-yl)phenyl 2-methylbutanoate (1), a new trinorsesquiterpene, 4-(6-methylbicyclo[4.1.0]hept-2-en-7-yl)butan-2-one (2), and eight known compounds (3-10) were isolated from the ... -
Antimicrobial compounds from Pimpinella species growing in Turkey
(Georg Thieme Verlag Kg, 2003)A new, 4-(2-propenyl)-phenyl angelate (1) and four known phenylpropanoids (2-5), were isolated from Pimpinella isaurica, a species endemic in Turkey. One new sesquiterpene, 1-methyl-4-(5-methyl-1-methylenehex-4-enyl)-7-o ... -
Effect of essential oils and isolated compounds from Pimpinella species on NF-kappa B: A target for antiinflammatory therapy
(John Wiley & Sons LTD, 2007)Pimpinella essential oils and isolated compounds were screened for their inhibitory activity against NF-kappa B mediated transcription in SW1353 cells. Twelve oils were effective in inhibiting NF-kappa B mediated transcription. ... -
Triterpenoid saponins from Bongardia chrysogonum
(American Chemical Society, 2000)Two new triterpenoid saponins, 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-alpha-L-arabino-pyranosyl]-hederagenin (1) and 3-O-[beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyransy(1-->4)-alpha-L-arabino ... -
New alkaloids from Bongardia chrysogonum
(Taylor & Francis LTD, 1998)Two new alkaloids, 17-desoxy-cis-lamprolobine (1) and bonzakaline (2), along with the known alkaloids lupanine (3) and palmatrubine (4), have been isolated from the ethanolic extracts of Bongardia chrysogonum. Compounds 1 ... -
Alkaloids of Bongardia chrysogonum
(Pergamon-Elsevier Science LTD, 1999)Two new pyridine alkaloids were isolated from the tubers of Bongardia chrysogonum, together with a new lupine alkaloid. The structures of the new alkaloids were characterized by spectroscopic analysis and the stereochemistry ... -
Effect of an acid treatment on the phytochemical and antioxidant characteristics of extracts from selected Lamiaceae species
(Elsevier Sci LTD, 2005)Aqueous-methanol extracts were prepared from basil (Ocimum basilicum L.), bay (Laurus nobilis L.), oregano (Origanum vulgare L.), rosemary (Rosmarinus officinalis L.), sage (Salvia officinalis L.), savory (Satureja hortensis ... -
Chemical composition and in vitro antioxidant evaluation of a water-soluble Moldavian balm (Dracocephalum moldavica L.) extract
(Elsevier Science BV, 2007)The chemical composition and antioxidant properties of a water-soluble extract of Moldavian balm (Dracocephalum moldavica L., syn. Moldavian dragonhead) prepared by hydrodistillation are presented in this study. The total ... -
Screening of free radical scavenging compounds in water extracts of Mentha samples using a postcolumn derivatization method
(American Chemical Society, 2004)An on-line high-performance liquid chromatography-1,1-diphenyl-2-picrylhydrazyl (HPLC-DPPH.,) method has been improved for the detection of polar and nonpolar radical scavenging compounds in complex plant extracts. Nine ... -
An improved on-line HPLC-DPPH* method for the screening of free radical scavenging compounds in water extracts of Lamiaceae plants
(Consultants Bureau, 2003)An on-line HPLC-1,1-diphenyl-2-picrylhydrazyl (DPPH*) method has been improved for the detection of polar and nonpolar radical scavenging compounds from complex plant extracts. Eight water extracts were prepared from ... -
An improved HPLC post-column methodology for the identification of free radical scavenging phytochemicals in complex mixtures
(Springer Heidelberg, 2004)The importance of natural antioxidants principally relates to their health-promoting properties. The discovery of new sources of established compounds or more potent compounds is a costly exercise and any technique capable ... -
The biological activity and essential oil composition of 17 Agathosma (Rutaceae) species
(Allured Publ Corp, 2006)The essential oil composition, antimicrobial, anti-inflammatory and cytotoxic activities of 17 indigenous Agathosma species (18 samples) were investigated in order to validate their use in traditional healing. The results ... -
The essential oil composition and chemotaxonomical appraisal of South African Pelargoniums (Geraniaceae)
(Allured Publ Corp, 2006)A plethora of information is available on the essential oil composition of commercially grown Pelargonimus namely P. capitatum, P. graveolens and P. radens and their hybrids, while only a few chemical investigations have ... -
New, sesquiterpenoid-type bicyclic compounds from the buds of Betula pubescens - Ring-contracted products of beta-caryophyllene?
(Wiley-V C H Verlag GMBH, 2004)The essential oils obtained from the buds of Betula pubescens ssp. pubescens and B. pubescens ssp. czerepanovii were analyzed both by GC and GC/MS and, of the 31 compounds identified, 14-acetoxy-beta-caryophyllene was ... -
Seasonal and geographical variation of Heteropyxis natalensis essential oil and the effect thereof on the antimicrobial activity
(Elsevier Science BV, 2007)Heteropyxis natalensis (Heteropyxidaceae) is traditionally used to treat respiratory disorders, and as a decongestant and antimicrobial agent. The seasonal variation of the hydrodistilled essential oil was investigated. ... -
A seasonal variation study of the chemical composition and antimicrobial activity of the essential oil of Agathosma ovata (Thunb.) Pillans (Rutaceae)
(Allured Publ Corp, 2006)A seasonal variation study was performed on the chemical composition of the essential oil of Agathosma ovata (Rutaceae). In addition, this study looked at how variations may impact the antimicrobial activity of A. ovata. ...
