Antioxidant Activities and HPLC-DAD Based Phenolic Content Determination of Bauhinia scandens

2016 ◽  
Vol 14 (6) ◽  
pp. 1-9
Author(s):  
Md Hossain ◽  
Sarzil Niloy ◽  
Afroza Hosen ◽  
Md Islam ◽  
Zahirul Islam ◽  
...  
Keyword(s):  
Phenolic Content ◽  
Antioxidant Activities ◽  
Content Determination

scholarly journals Determination of Phenolic Compounds and Antioxidant Activity in Vegetables Consumed in Mekelle Tigray Ethiopia

2016 ◽  
Vol 4 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Teklit G. Amabye ◽  
Frehiwot Mekonen
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Research Studies

Vegetables are widely consumed in Mekelle and imported from different regions and zones of the countries. This study was performed to evaluate the phenolic content and antioxidant activity of vegetables commonly consumed in Mekelle. Kale, carrot, cabbage and barcoli were used in the study. This research studies in detail the contents of phenolic compounds determined by the Folin−Ciocalteu reagent and the antioxidant activities determined by DPPH (using diphenyl-p-picrylhydrazyl radical). Among all vegetables kale showed highest phenolic content followed by barcoli, cabbage and carrot   and the highest antioxidant activity were barcoli followed by kale, cabbage and carrot   which was expressed in % of DPPH consumption after 30 minutes of reaction.  The data shows the importance of antioxidant activity of vegetables in the diet. 

scholarly journals Total polyphenolic compounds contents (TPC), total antioxidant activities (TAA) and HPLC determination of individual polyphenolic compounds in selected Moravian and Austrian wines

2011 ◽  
Vol 9 (4) ◽  
pp. 677-687 ◽  
Author(s):  
Badamtsetseg Soyollkham ◽  
Pavel Valášek ◽  
Miroslav Fišera ◽  
Vlastimil Fic ◽  
Vlastimil Kubáň ◽  
...  
Keyword(s):  
Phenolic Content ◽  
Antioxidant Activities ◽  
Polyphenolic Compounds ◽  
Total Phenolic ◽  
Total Antioxidant Activity ◽  
Antioxidant Power ◽  
Geographical Regions ◽  
Total Antioxidant ◽  
Ferric Reducing Antioxidant Power

AbstractWine samples (Grüner Veltliner (GV) and Zweigelt (ZW) from four different geographical regions of Austria and Czech Republic) were analyzed to determine their total phenolic content (TPC) by applying the Folin-Ciocalteau method, total antioxidant activity (TAA) by FRAP (ferric reducing antioxidant power) and DPPH (1,1-diphenyl-2-picryl-hydrazyl) assays, and to identify and quantify eleven phenolic compounds using a HPLC/UV-VIS method.

scholarly journals Phenolic Content from Medicinal Plants and their Products Used in Veterinary Medicine

2018 ◽  
Vol 64 (2) ◽  
pp. 77-82 ◽  
Author(s):  
Erzsebet Varga ◽  
Ibolya Schmidt ◽  
Beáta Szövérfi ◽  
Mădălina Daniela Pop ◽  
Hajnal Kelemen ◽  
...  
Keyword(s):  
Veterinary Medicine ◽  
Phenolic Compounds ◽  
Medicinal Plants ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Colorimetric Method ◽  
Natural Antioxidants ◽  
Extraction Methods ◽  
Phenolic And Flavonoid

Abstract Objective: The aim of the study was to determine the content of polyphenols and flavonoids from sixteen selected medicinal plants from the spontaneous Romanian flora and fifteen tinctures obtained with propylene glycol. Methods: The polyphenols were determined by the Folin-Ciocalteu method while the flavonoids by using a colorimetric method from the 10th edition of the Romanian Pharmacopoeia. The antioxidant activities of the most common nine medicinal plants and fifteen tinctures were determined by DPPH and ABTS methods. Results: The results highlighted that the phenolic compounds and flavonoids have contributed to their antioxidant activities and the medicinal plants and tinctures included in the study are rich sources of natural antioxidants. Conclusions: There are a wide variety of extraction methods for the determination of phenolics and flavonoids. The study confirms a correlation between phenolic and flavonoid contents obtained by using the DPPH and ABTS tests.

Comparative Study of Antioxidant Activities and Total Phenolic Content of Selected Edible Wild Mushrooms

2011 ◽  
Vol 13 (3) ◽  
pp. 245-255 ◽  
Author(s):  
Hip Seng Yim ◽  
Fook Yee Chye ◽  
Mee Yee Lee ◽  
Patricia Matanjun ◽  
Siew Eng How ◽  
...  
Keyword(s):  
Comparative Study ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Wild Mushrooms ◽  
Edible Wild Mushrooms

SKRINING FITOKIMIA DAN UJI AKTIVITAS ANTIOKSIDAN DAN ANTITUMOR 20 TUMBUHAN OBAT ASAL KABUPATEN MANOKWARI

2008 ◽  
Vol 7 (1) ◽  
Author(s):  
Bimo Budi Santoso
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Antitumor Activity ◽  
Traditional Method ◽  
Extraction Efficiency ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Phenolic Contents ◽  
Total Phenolic Contents

<strong><em>Flavanoid, steroid, and terpenoid contents of 20 Manokwari medicinal plants were analyzed.  The antioxidant activity, total phenolic contents and antitumor activity of 20 Manokwari medicinal plants were also evaluated. The result shows that 83% positif to flavanoid test, 59% positif to terpenoid test and only 25% positif steroid. Antioxidant activity and total phenolic contents evaluated using Ferric Thiocianate (FTC) and Folin-Ciocalteu methods respectively. Antioxidant activity and total phenolic contents of medicinal plants were extracted by the traditional method, boiling in water and also in 80% methanol. Twenty plants evaluated in both exstracts have significantly varies of antioxidant activities and phenolic contents,  A significant and linier correlation coefficient between the antioxidant activity and the total phenolic content was found in both aqueous (R<sup>2</sup>= 0,77) and methanol (R<sup>2</sup> = 0,85). Antitumor activity was tested using cell maurine P-388 and only 2 of medicinal plants are active to inhibit cell maurine P-388. Comparing extraction efficiency of the two methods, the methanol extracted phenolic compounds more efficiently, and antioxidant activity of the extract was higher.</em></strong>

Survey of Chinese Cowpea Cultivars for Phenolic Compounds and Antioxidant Activity

2018 ◽  
Vol 17 (4) ◽  
pp. 337-348
Author(s):  
Bai Zhouya ◽  
Huang Xiaojun ◽  
Meng Jinxia ◽  
Kan Lijiao ◽  
Nie Shaoping
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Jiangxi Province ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Comprehensive Investigation ◽  
Cowpea Cultivars ◽  
P Distribution

Distribution of phenolic compounds and antioxidant activities was surveyed in 24 varieties of Chinese cowpea from 4 provinces. Identity of phytochemicals were determined by UPLC-ESIQTOF-MS/MS and quantified by HPLC-ESI-QqQ-MS/MS. Seven phenolic acids, 16 flavonoids and 9 other compounds were identified and several of these were quantified. Quercetin-3-glucoside and kaempferol-glucoside were the major phenolic compounds. In addition, our study indicated that OJYDH cultivar from Jiangxi province had the highest total phenolic content, total flavonoid content and stronger antioxidant activities than other cowpea cultivars. This study made a comprehensive investigation on antioxidants from cowpea and provided the useful data to support its function.

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