Phenolic contents and antioxidant activities of different parts of Houttuynia cordata Thunb.

2012 ◽  
Vol 6 (6) ◽  
Author(s):  
Wenguo Cai
Keyword(s):  
Antioxidant Activities ◽  
Houttuynia Cordata ◽  
Phenolic Contents ◽  
Houttuynia Cordata Thunb ◽  
Different Parts

scholarly journals ANTIOXIDANT ACTIVITIES FROM VARIOUS EXTRACTS OF DIFFERENT PARTS OF KELAKAI (STENOCHLAENA PALUSTRIS) GROWN IN CENTRAL KALIMANTAN - INDONESIA

2016 ◽  
pp. 215 ◽  
Author(s):  
Irda Fidrianny ◽  
Siti Kusmardiyani ◽  
Grace Novita
Keyword(s):  
Antioxidant Activities ◽  
Carotenoid Content ◽  
Total Phenolic ◽  
Root Extract ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Dpph Method ◽  
Young Leaves ◽  
Ferric Reducing Antioxidant Power ◽  
Different Parts

<p>ABSTRACT<br />Objectives: The aims of this research were to determine antioxidant activity from various extracts of different parts of kelakai (Stenochlaena palustris<br />[Burm.f.] Bedd) using two antioxidant testing methods, which were 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power<br />(FRAP), and correlation of total phenolic contents (TPC), total flavonoid contents (TFC), and total carotenoid contents (TCC) with their inhibitory<br />concentration 50% (IC<br />50<br />) of DPPH and exhibitory concentration 50% (EC<br />50<br />) of FRAP.<br />Methods: Sample was extracted by reflux using different polarity solvents. The extracts were evaporated using vacuum rotary evaporator. Antioxidant<br />activities were tested using DPPH and FRAP assays, determination of TPC, TFC, and TCC was carried out by ultraviolet-visible spectrophotometry, and<br />correlation with their IC<br />50<br /> of DPPH and EC<br />50<br /> of FRAP capacities was analyzed by Pearson’s method.<br />Results: Ethanolic root extract of kelakai (S. palustris) had the lowest IC<br />50<br /> of DPPH scavenging activity 0.8 µg/ml and the lowest EC<br /> of FRAP capacity<br />5.4 µg/ml. Ethanolic kelakai root extract demonstrated the highest phenolic content, ethyl acetate young leaves extract had the highest flavonoid<br />content, and the highest carotenoid content was given by n-hexane root extract. There was significantly negative correlation between TPC in root<br />extract of kelakai with their IC<br />50<br /> of DPPH and EC<br />50<br /> of FRAP.<br />Conclusions: All different extracts of kelakai parts were categorized as very strong antioxidants by DPPH method. Phenolic compounds in kelakai<br />root extract were the major contributor in antioxidant activities by DPPH and FRAP methods. DPPH and FRAP showed linear results in antioxidant<br />activities of root kelakai extract.<br />Keywords: Antioxidant, 2,2-diphenyl-1-picrylhydrazyl, Ferric reducing antioxidant power, Stenochlaena palustris, Young leaves, Old leaves, Root.<br />50</p>

Assessment of antioxidant activities and phenolic contents of some edible plants

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
I Orhan ◽  
M Kartal ◽  
FS Şenol ◽  
M Abou-Asaker ◽  
B Şener
Keyword(s):  
Antioxidant Activities ◽  
Edible Plants ◽  
Phenolic Contents

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>

scholarly journals Phenolic Profiles and Antioxidant Activities of 30 Tea Infusions from Green, Black, Oolong, White, Yellow and Dark Teas

Antioxidants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 215 ◽  
Author(s):  
Cai-Ning Zhao ◽  
Guo-Yi Tang ◽  
Shi-Yu Cao ◽  
Xiao-Yu Xu ◽  
Ren-You Gan ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Dry Weight ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Phenolic Contents ◽  
Tea Infusions ◽  
Phenolic Profiles ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Tea is among the most consumed drink worldwide, and its strong antioxidant activity is considered as the main contributor to several health benefits, such as cardiovascular protection and anticancer effect. In this study, the antioxidant activities of 30 tea infusions, which were obtained by the mimic of drinking tea of the public, from green, black, oolong, white, yellow and dark teas, were evaluated using ferric-reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) assays, ranging from 504.80 ± 17.44 to 4647.47 ± 57.87 µmol Fe2+/g dry weight (DW) and 166.29 ± 24.48 to 2532.41 ± 50.18 µmol Trolox/g DW, respectively. Moreover, their total phenolic contents (TPC) were detected by Folin-Ciocalteu assay and were in the range of 24.77 ± 2.02 to 252.65 ± 4.74 mg gallic acid equivalent (GAE)/g DW. Generally, Dianqing Tea, Lushan Yunwu Tea, and Xihu Longjing Tea showed the strongest antioxidant activities among 30 teas. Furthermore, the phenolic compounds in tea infusions were identified and quantified, with catechins most commonly detected, especially in green tea infusions, which were main contributors to their antioxidant activities. Besides tea polyphenols, considerable content of caffeine also presented in 30 tea infusions.

Sign in / Sign up

Export Citation Format

Share Document