نتایج جستجو برای: phenolic extracts

تعداد نتایج: 108821  

2012
RITU SAINI VEENA GARG KOUSHALYA DANGWAL

Ficus palmata, Pyrus pashia and Ficus auriculata are the popular wild edible fruits of Uttarakhand. The present study aimed to evaluate their total phenolic, flavonoid contents, antioxidant and antiproliferative activities by using two solvents namely 80% aqueous methanol and acetone. The results showed highest phenolic and flavonoid contents in the Ficus palmata acetone extract, while lowest i...

2016
Dara Dastan Atousa Aliahmadi

Ornithogalum cuspidatum is an Iranian species of the genus Ornithogalum L. (family: Liliaceae). The species of Ornithogalum are used widely in Iranian traditional medicine for treatment of inflammatory and respiratory disease. The purpose of the present study is to evaluate antioxidant and antimicrobial activities of n-hexane, ethyl acetate, methanol and aqueous extracts of O. cuspidatum leaves...

2014
Ivana Generalić Mekinić M. Gotovac Danijela Skroza Višnja Katalinić

In the last few decades numerous studies have proved that an olive leaf is a rich source of bioactive phenolic compounds, mainly oleuropein and its derivatives. The aim of this study was to investigate the influence of the extraction solvent on the phenolic and oleuropein content in the leaf extracts of Dalmatian autochthonic olive cultivars: Oblica, Lastovka and Levantinka. The antioxidant act...

Journal: :Indian journal of biochemistry & biophysics 2011
Birgül Vanizor Kural Nurçin Küçük Fulya Balaban Yücesan Asim Orem

Of Brassicaceous plants, kale (Brassica oleraceae L. var. acephala DC) contains polyphenols, flavonoids, isoflavones and glucosinolates and so has antioxidant and anticarcinogenic properties. Antioxidants inhibit negative effects of free radicals and may, therefore, protect tissues against oxidative damage. Oxidation of lipoproteins is a key event in the development of atherosclerosis. In the c...

Background and purpose: No reports are found on biological activities of Nonea lutea (boraginaceae). The aim of this study was to investigate the antioxidant and antibacterial activities of this plant. Materials and methods: The aerial parts were extracted by three different methods, i.e. meceration (MA), ultrasonic assisted (US), and soxhlet assisted (SO) extractions with methanol. Antioxidat...

2013
Sushil Kumar Middha Talambedu Usha Veena Pande

This study revealed polyphenolic content, nutritive content, antioxidant activity, and phenolic profile of methanol and aqueous extracts of Punica granatum peel extract. For this, extracts were screened for possible antioxidant activities by free radical scavenging activity (DPPH), hydrogen peroxide scavenging activity and ferric-reducing antioxidant power (FRAP) assays. The total phenolics and...

Journal: :Journal of chromatography. A 2013
T L Miron M Herrero E Ibáñez

In this work enzyme-assisted extraction (EAE) and pressurized liquid extraction (PLE) are applied for extraction of natural compounds from lemon balm (Melissa officinalis). Cellulase, endo-β-1,4 xylanase and pectinase were studied in order to degrade cell wall of lemon balm leaves and to release phenolic compounds. On the other hand, in order to compare the performance obtained with EAE, PLE us...

Journal: :African journal of traditional, complementary, and alternative medicines : AJTCAM 2014
Muhammad Helmi Nadri Yushatika Salim Norazah Basar Azli Yahya Razauden Mohamed Zulkifli

BACKGROUND The ethyl acetate and chloroform extracts of stems, leaves and fruits of Phaleria macrocarpa were screened for their antioxidant capacity and tyrosinase inhibition properties. MATERIAL AND METHOD The total phenolic content (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging and ferric-ion reducing power (FRAP) were used to evaluate their antioxidant capacity. Tyrosi...

2011
C. Shwetha

Preliminary phytochemical screening was carried out for pet ether, chloroform and ethanol extracts of Holarrhena antidysentrica leaves. The extracts showed the presence of various phytocompounds like alkaloids and flavonoids. In vitro antioxidant activity was carried out with all the three extracts using DPPH assay using ascorbic acid as a standard. All the extracts had shown significant antiox...

2011
FAHAD AL-JUHAIMI KASHIF GHAFOOR

Leaves and stems of three different herbs from two different families were used to extract phenolic compounds and the bioactivity of the extracts was evaluated by using 1, 1-diphenyl-2-picrylhydrazyl or DPPH scavenging ability or their antioxidant activities. Extract from leaves of mint, which belongs to Lamiaceae family contained 1.24 mgGAE/100 mL of total phenolic compounds and 34.21% antioxi...

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