background food born pathogenic bacteria are the most important agents of infections in humans, and food spoilage also results in economic losses in food industry. objectives the aim of this study was the evaluation of chemical components, total phenolic content, antioxidant and antibacterial activities of artemisia dracunculus essential oil. materials and methods the essential oil of tarragon ...

p-Carotene (pro-vitamin A) is a lipid-soluble antioxidant capable of quenching singlet oxygen and scavenging free-radical species [ 1-31, Epidemiological studies have established a correlation between p-carotene dietary supplementation with a reduced risk of cancer and heart disease thus providing a basis for clinical investigation [4, 51. The antioxidant properties of pcarotene, perhaps in com...

the essential oil of verbena officinalis growing in iran was extracted using hydro-distillationmethod and the antibacterial and antioxidant activities were evaluated. the antibacterial activity of the essentialoil against a gram-positive (s. aureus atcc25923) and gram negative (e. coli atcc 25922) were examined.the results obtained revealed that the essential oil exhibited variable levels of an...

This study represents the first report on the chemical composition and biological activity of Trifolium angustifolium var. angustifolium. The major components of the essential oil were identified as hexatriacontene (23.0%), arachidic acid (15.5%) and α-selinene (10.0%). The main constituents of the fatty acid obtained from the petroleum ether extract were identified as palmitic acid (29.8%), li...

The antioxidant activity of 14 compounds (1-14) isolated from the ether and butanolic extracts of the aerial parts of Ophryosporus heptanthus has been assayed using a beta-carotene bleaching method and the DPPH technique. Compounds 1 and 13 showed the most potent antioxidant activity. Their structures have been established by spectroscopic techniques (mainly NMR). Compounds 7 and 12 are new nat...

Background: Citrullus colocynthis L. (C. colocynthis) is commonly known as colocynth. It belongs to the family Cucurbitaceae that frequently used in alternative medicine north of Africa. The aim study: present research was undertaken investigate chemical composition, antioxidant, antiproliferative, and antibacterial potentials C. seed extract. Material methods: composition organic extract chara...

this study was designed to examine bioactive compounds of the thyme-enriched corn oil and to determine the antioxidant activity of its methanolic extract. volatile compounds composition was investigated by gas chromatography-mass spectrometry (gc-ms), whereas phenolic compounds analysis was performed by reversed-phase high-performance liquid chromatography (rp-hplc). antioxidant activities of t...

conclusions according to the obtained data, synthesized pyridine based chalcones (3a-3j) could be proposed as potential antioxidant lead compounds. background natural chalcones and also their synthetic derivatives have attracted increasing attention due to various pharmacological applications. development and discovery of new chalcones with antioxidant activities is one of the attracting areas ...

OBJECTIVE To elucidate free radical scavenging activity of ethanolic extract Lagenaria siceraria (L. siceraria) (Molina) fruit. METHODS The free radical scavenging activity of the L. siceraria (Molina) fruit extract was assayed by using α,α-diphenyl-β-picrylhydrazyl (DPPH), 2,20-azinobis 3-ethyl benzothiazoline-6-sulfonate (ABTS), FRAP, reducing power, chelating ability and β-carotene bleachi...

Purpose: To determine the antimicrobial and antioxidant activities of Pulicaria inuloides and Ocimum forskolei essential oils. Methods: Steam distillation of the aerial parts of P. inuloides and O. forskolei was performed using a Clevenger apparatus. Essential oils were analyzed by gas chromatography–mass spectrometry. Total phenolic content and antioxidant activities were determined by 2,2-dip...