نتایج جستجو برای: phenolic and flavonoid compounds

تعداد نتایج: 16856394  

Journal: :Talanta 2008
M J Cabrita M Torres V Palma E Alves R Patão A M Costa Freitas

A reversed phase liquid chromatography-DAD method is proposed for analysis of major non-flavonoid phenolic compounds in wines. The method employed a mixture of acetic acid, water and methanol as eluents and was used to evaluate the impact of malolactic fermentation in low molecular phenolic compounds. The wines analyzed underwent different treatments, like the addition of a pectolytic enzyme or...

2014
María J. Rodríguez-Vaquero Claudia V. Vallejo Pedro A. Aredes-Fernandez

Argentinean herbal infusions were studied for their beneficial biological properties and secondary metabolites content, such as phenolic compounds in order to find new natural products beneficial. The modifications of antihypertensive and antioxidant activities by the addition of commonly used additives (lemon, sugar and sweetener) were studied also. Ilex paraguaiensis infusion showed the highe...

Rosa canina L. is a member of Rosaceae family, which is well-known for its high phenolic contents. These compounds are known to possess antioxidant and antiradical effects. In order to compare the antioxidant and antiradical activity of wild Rosa phenolic extracts, two wild Rosa species (Rosa canina L. and Rosa pimpinellifolia L.) were selected from Takab, Oshnavieh and Qasemloo Valley of Urmia...

Journal: :research in pharmaceutical sciences 0

in this study, caffeic acid (ca) and its three derivatives including 3-caffeoylquinic acid (3-cqa, neochlorogenic acid), 4-caffeoylquinic acid (4-cqa, cryptochlorogenic acid), and 5-caffeoylquinic acid (5-cqa, chlorogenic acid) were identified in bupleurum chinense aerial parts using reverse-phase high-performance liquid chromatography (rp-hplc) with photodiode array (pda) detector, reference c...

2014
Suvi Sutela Terhi Hahl Heidi Tiimonen Tuija Aronen Tiina Ylioja Tapio Laakso Pekka Saranpää Vincent Chiang Riitta Julkunen-Tiitto Hely Häggman

A small multigene family encodes 4-coumarate:CoA ligases (4CLs) catalyzing the CoA ligation of hydroxycinnamic acids, a branch point step directing metabolites to a flavonoid or monolignol pathway. In the present study, we examined the effect of antisense Populus tremuloides 4CL (Pt4CL1) to the lignin and soluble phenolic compound composition of silver birch (Betula pendula) Pt4CL1a lines in co...

Journal: :Molecules 2014
Fan Xu Li-Ying Luan Zhen-Wen Zhang Shan-Shan Huo Xiang Gao Yu-Lin Fang Zhu-Mei Xi

The grape berries of two varieties, Yan73 (Vitis vinifera L.) and Cabernet Sauvignon (CS) (Vitis vinifera L.) were treated with 0.40 mg/L 24-epibrassinolide (EBR), 1.00 mg/L brassinazole (Brz), and deionized water (control), at the veraison period. The EBR treatment significantly increased total phenolic content (TPC), total tannin content (TTC) and total anthocyanin content (TAC) of Yan73 and ...

Journal: :Molecules 2008
Aline Lamien-Meda Charles Euloge Lamien Moussa M Y Compaoré Roland N T Meda Martin Kiendrebeogo Boukare Zeba Jeanne F Millogo Odile G Nacoulma

A total of fourteen (14) species of wild edible fruits from Burkina Faso were analyzed for their phenolic and flavonoid contents, and their antioxidant activities using the DPPH, FRAP and ABTS methods. The data obtained show that the total phenolic and total flavonoid levels were significantly higher in the acetone than in the methanol extracts.Detarium microcarpum fruit had the highest phenoli...

2016
Konstantinos Papoutsis Quan V. Vuong Penta Pristijono John B. Golding Michael C. Bowyer Christopher J. Scarlett Costas E. Stathopoulos

Several studies have shown that UV-C (ultraviolet C) irradiation promotes the bioactive compounds and antioxidants of fresh fruits and vegetables. The aim of this study was to apply UV irradiation in dried lemon pomace powder for enhancing its phenolic content and antioxidant properties, thus more bioactive compounds should be available for extraction and utilization. Lemon pomace dried powder ...

Journal: :journal of herbal drugs (an international journal on medicinal herbs) 2016
hamidreza ardalani maryam hassanpour moghadam amin hadipanah farnoush fotovat ali azizi

background & aim: identification, characterization and detection of medicinal plants chemical composition are very important for phytochemical scientific source. sumac is one of the medicinal plants in the world that uses for industrial and pharmacological application. in this study, chemical composition of rhus coriaria has been investigated. experimental: chemical composition of the matu...

Journal: :iranian journal of pharmaceutical research 0
fai-chu wong faculty of science, universiti tunku abdul rahman, jalan universiti, bandar barat, 31900 kampar, perak, malaysia ann-li yong faculty of science, universiti tunku abdul rahman, jalan universiti, bandar barat, 31900 kampar, perak, malaysia evon peir-shan ting faculty of science, universiti tunku abdul rahman, jalan universiti, bandar barat, 31900 kampar, perak, malaysia sim-chyi khoo faculty of science, universiti tunku abdul rahman, jalan universiti, bandar barat, 31900 kampar, perak, malaysia hean-chooi ong institute of biological sciences, faculty of science, university of malaya, 50603 kuala lumpur, malaysia tsun-thai chai faculty of science, universiti tunku abdul rahman, jalan universiti, bandar barat, 31900 kampar, perak, malaysia

the purpose of this investigation was to determine the antioxidant potentials and anti-glucosidase activities of six tropical medicinal plants. the levels of phenolic constituents in these medicinal plants were also quantified and compared. antioxidation potentials were determined colorimetrically for scavenging activities against dpph and no radicals. metal chelating assay was based on the mea...

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