Polyphenolic Compounds, Antioxidant Capacity, and Quinone Reductase Activity of an Aqueous Extract ofArdisia compressain Comparison to Mate (Ilex paraguariensis) and Green (Camellia sinensis) Teas

2004 ◽  
Vol 52 (11) ◽  
pp. 3583-3589 ◽  
Author(s):  
Sonia Chandra ◽  
Elvira Gonzalez de Mejia
Keyword(s):  
Antioxidant Capacity ◽  
Aqueous Extract ◽  
Camellia Sinensis ◽  
Reductase Activity ◽  
Quinone Reductase ◽  
Polyphenolic Compounds ◽  
Ilex Paraguariensis

scholarly journals Antioxidant Capacity and Quinone Reductase Activity of Methanol Extracts and Fractions from Papaya Seed

2011 ◽  
Vol 21 (6) ◽  
pp. 775-782 ◽  
Author(s):  
Mi-Hee Yu ◽  
Sung-Gyu Lee ◽  
Hyo-Gwon Im ◽  
In-Gyeong Chae ◽  
Hyun-Jeong Kim ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Reductase Activity ◽  
Quinone Reductase ◽  
Methanol Extracts ◽  
Papaya Seed

HPLC Screening of Bioactives Compounds and Antioxidant Capacity of Different Hypericum Species

2018 ◽  
Vol 69 (2) ◽  
pp. 305-309 ◽  
Author(s):  
Daniela Gitea ◽  
Simona Vicas ◽  
Manuel Alexandru Gitea ◽  
Sebastian Nemeth ◽  
Delia Mirela Tit ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Methanol Extract ◽  
Antioxidant Properties ◽  
Polyphenolic Compounds ◽  
The Other ◽  
The North ◽  
Western Area ◽  
North Western ◽  
Hypericum Species ◽  
Biological Actions

Our study compares the content in polyphenolic compounds and hypericin, in four species of Hypericum - H. perforatum L., H. maculatum Cr., H. hirsutum L., H. tetrapterum Fr. (syn. Hypericumacutum Mnch.) harvested from spontaneous flora in the north-western area of Transylvania, Romania. These species represent an important source of such compounds with different biological actions. After making the extracts, they were subjected to HPLC-SM analysis. The presence of rutoside in the largest amount (462.82 mg %) in the H. perforatum extract was observed, this containing most of the flavonoid heterosides. For the species H. maculatum, the presence in a much higher amount of the hyperoside (976.36 mg %) is characteristic compared to the other species. Quercetol is the best represented of the flavonoid aglycons, its concentration being the highest in H. hirsutum (659.66 mg %). The hypericin content ranges from 0.2171 g % in the H. tetrapterum extract, to 0.0314 g % in the methanol extract of H. maculatum.The highest antioxidant properties measured by FRAP method were recorded in the case of H. perforatum and H. maculatum.

scholarly journals Svalbamides A and B, Pyrrolidinone-Bearing Lipodipeptides from Arctic Paenibacillus sp.

Marine Drugs ◽  
2021 ◽  
Vol 19 (4) ◽  
pp. 229
Author(s):  
Young Eun Du ◽  
Eun Seo Bae ◽  
Yeonjung Lim ◽  
Jang-Cheon Cho ◽  
Sang-Jip Nam ◽  
...  
Keyword(s):  
Reductase Activity ◽  
Quinone Reductase ◽  
The Arctic ◽  
Amino Acid Residues ◽  
Chemopreventive Agents ◽  
Svalbard Archipelago ◽  
Paenibacillus Sp ◽  
Combinational Analysis ◽  
Culture Extract ◽  
The Absolute

Two new secondary metabolites, svalbamides A (1) and B (2), were isolated from a culture extract of Paenibacillus sp. SVB7 that was isolated from surface sediment from a core (HH17-1085) taken in the Svalbard archipelago in the Arctic Ocean. The combinational analysis of HR-MS and NMR spectroscopic data revealed the structures of 1 and 2 as being lipopeptides bearing 3-amino-2-pyrrolidinone, d-valine, and 3-hydroxy-8-methyldecanoic acid. The absolute configurations of the amino acid residues in svalbamides A and B were determined using the advanced Marfey’s method, in which the hydrolysates of 1 and 2 were derivatized with l- and d- forms of 1-fluoro-2,4-dinitrophenyl-5-alanine amide (FDAA). The absolute configurations of 1 and 2 were completely assigned by deducing the stereochemistry of 3-hydroxy-8-methyldecanoic acid based on DP4 calculations. Svalbamides A and B induced quinone reductase activity in Hepa1c1c7 murine hepatoma cells, indicating that they represent chemotypes with a potential for functioning as chemopreventive agents.

Ionic Liquids as Additives for Extraction of Saponins and Polyphenols from Mate (Ilex paraguariensis) and Tea (Camellia sinensis)

2013 ◽  
Vol 52 (34) ◽  
pp. 12146-12153 ◽  
Author(s):  
Bernardo D. Ribeiro ◽  
Maria Alice Z. Coelho ◽  
Luis Paulo N. Rebelo ◽  
Isabel M. Marrucho
Keyword(s):  
Ionic Liquids ◽  
Camellia Sinensis ◽  
Ilex Paraguariensis

Aqueous extract of Ilex paraguariensis decreases nucleotide hydrolysis in rat blood serum

2005 ◽  
Vol 97 (1) ◽  
pp. 73-77 ◽  
Author(s):  
Milena Görgen ◽  
Kátia Turatti ◽  
Afonso R. Medeiros ◽  
Andréia Buffon ◽  
Carla D. Bonan ◽  
...  
Keyword(s):  
Blood Serum ◽  
Aqueous Extract ◽  
Ilex Paraguariensis ◽  
Nucleotide Hydrolysis ◽  
Rat Blood

scholarly journals Extraction methods determine the antioxidant capacity and induction of quinone reductase by soy products in vitro

2009 ◽  
Vol 116 (1) ◽  
pp. 351-355 ◽  
Author(s):  
Bradley W. Bolling ◽  
Jeffrey B. Blumberg ◽  
C.-Y. Oliver Chen
Keyword(s):  
Antioxidant Capacity ◽  
Extraction Methods ◽  
Quinone Reductase

The Antioxidant Capacity of Aqueous Extracts from Yerba Mate (Ilex paraguariensis)

BIOPHYSICS ◽  
2021 ◽  
Vol 66 (1) ◽  
pp. 125-132
Author(s):  
Yu. O. Teselkin ◽  
I. V. Babenkova ◽  
L. A. Pavlova ◽  
A. Lee ◽  
A. A. Kochetova ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Ilex Paraguariensis ◽  
Yerba Mate ◽  
Aqueous Extracts

Redox Potentials and Quinone Reductase Activity ofl-Aspartate Oxidase fromEscherichia coli†

Biochemistry ◽  
1997 ◽  
Vol 36 (51) ◽  
pp. 16221-16230 ◽  
Author(s):  
Gabriella Tedeschi ◽  
Lucia Zetta ◽  
Armando Negri ◽  
Michele Mortarino ◽  
Fabrizio Ceciliani ◽  
...  
Keyword(s):  
Reductase Activity ◽  
Quinone Reductase ◽  
Redox Potentials ◽  
Fromescherichia Coli
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