نتایج جستجو برای: phenolic and flavonoid compounds

تعداد نتایج: 16856394  

2013
Ehsan Karimi Hawa Z.E. Jaafar Mohd Hafiz Ibrahim

This research was performed to evaluate the effect of light intensity (310 and 630 μmol ms) on production and antioxidant activity of flavonoids and phenolic compounds from the leaves, stems and roots in three varieties of Labisia pumila Benth. The experiment was carried out base on randomized complete block design with a factorial arrangement. The results revealed that total phenolic and flavo...

Journal: :African journal of traditional, complementary, and alternative medicines : AJTCAM 2014
Akinola A Alafiatayo Ahmad Syahida Maziah Mahmood

BACKGROUND Natural products such as herbs, fruits, spices, beverages, vegetables are becoming more popular among scientific community and consumers because of their potential to arrest the effect of free radicals in human system. This study determined the total antioxidant capacity of ten selected species of Zingiberaceae (Ginger) used as spices and for medicinal purposes in Southeast Asia. M...

Journal: :Molecules 2015
Mirtha Navarro Hoyos Fernando Sánchez-Patán Renato Murillo Masis Pedro J Martín-Álvarez William Zamora Ramirez Maria J Monagas Begoña Bartolomé

The phenolic composition of extracts from Uncaria tomentosa L. from different regions of Costa Rica was studied using advanced analytical techniques such as UPLC/TQ-ESI-MS and (13)C-NMR. Samples from leaves, stems, bark and wood (n = 22) were subjected to extraction to obtain phenolic and alkaloid extracts, separately. Comparatively, higher values of total phenolic content were observed for lea...

فهمیده, لیلا, مزارعی, ایوب, موسوی نیک, سیدمحسن,

Phenolic compounds, especially those with plant origin, constitute an essential part of the human diet due to their antioxidant properties. Antioxidants protect biological systems (nucleic acids, proteins, lipids, lipoproteins) against free radicals and reactive oxygen species. Some medicinal plants contain so high amounts of antioxidants that their use can be considerably effective for human h...

Journal: :Biological research 2009
Vera A D Poiatti Fernando R Dalmas Leandro V Astarita

The natural resistance of plants to disease is based not only on preformed mechanisms, but also on induced mechanisms. The defense mechanisms present in resistant plants may also be found in susceptible ones. This study attempted to analyze the metabolic alterations in plants of the potato Solanum tuberosum L. cv. Agata that were inoculated with the incompatible plant-pathogenic bacteria X. axo...

2017
Disna Kumari Terrence Madhujith Anoma Chandrasekara

Soluble and bound phenolic compounds were extracted from different varieties of millet types namely, finger millet, foxtail, and proso millet cultivated at dry and intermediate climatic zones in Sri Lanka. The extracts were examined for their total phenolic content (TPC), total flavonoid content (TFC), and proanthocyanidin content (PC). The antioxidant activities were meassured by reducing powe...

2014
Mindaugas Liaudanskas Pranas Viškelis Raimondas Raudonis Darius Kviklys Norbertas Uselis Valdimaras Janulis

The aim of this study was to determine the composition and content of phenolic compounds in the ethanol extracts of apple leaves and to evaluate the antioxidant activity of these extracts. The total phenolic content was determined spectrophotometrically, as well as the total flavonoid content in the ethanol extracts of apple leaves and the antioxidant activity of these extracts, by the ABTS, DP...

Journal: :journal of agricultural science and technology 2015
m. mianabadi m. hoshani s. salmanian

dorema aucheri boiss. (apiaceae) is an endemic plant growing in iran. this plant is used as food and its extracts are recommended for the treatment of a wide range of diseases. to conduct this study, leaf, stem, and flower of d. aucheri were collected from near yasouje, iran. antioxidant and antimicrobialeffects of methanol extracts were measured. further, total phenolic,flavonoid, anthocyanin,...

Journal: :Journal of medicinal food 2012
Ivana Mudnic Danijela Budimir Darko Modun Grgo Gunjaca Ivana Generalic Danijela Skroza Visnja Katalinic Ivica Ljubenkov Mladen Boban

In contrast to the well-described various biological effects of grape wines, the potential effects of commonly consumed blackberry wine have not been studied. We examined in vitro antioxidant and vasodilatory effects of four blackberry wines and compared them with the effects of two red and two white grape wines. Although some blackberry wines had lower total phenolic content relative to the re...

2016
Mei Gee Ong Siti Nur Aishah Mat Yusuf Vuanghao Lim

Endogenous and exogenous antioxidants are used to neutralise free radicals and protect the body from free radicals by maintaining the redox balance. The antioxidant properties of Dracaena sanderiana leaves were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, and the total phenolic and flavonoid contents were measured. The classes of secondary metabolites were evaluated through p...

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