Phenolic Composition and Radical Scavenging Activity of Sweetpotato-Derived Shochu Distillery By-Products Treated with Koji

2004 ◽  
Vol 68 (12) ◽  
pp. 2477-2483 ◽  
Author(s):  
Makoto YOSHIMOTO ◽  
Rie KURATA-AZUMA ◽  
Makoto FUJII ◽  
De-Xing HOU ◽  
Kohji IKEDA ◽  
...  
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
Phenolic Composition ◽  
By Products

scholarly journals Characterization of Protein Hydrolysates from Fish Discards and By-Products from the North-West Spain Fishing Fleet as Potential Sources of Bioactive Peptides

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 338
Author(s):  
Andreia Henriques ◽  
José A. Vázquez ◽  
Jesus Valcarcel ◽  
Rogério Mendes ◽  
Narcisa M. Bandarra ◽  
...  
Keyword(s):  
Inhibitory Activity ◽  
Bioactive Peptides ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Protein Hydrolysates ◽  
Scavenging Activity ◽  
North West ◽  
Chelating Activity ◽  
The North ◽  
By Products

Fish discards and by-products can be transformed into high value-added products such as fish protein hydrolysates (FPH) containing bioactive peptides. Protein hydrolysates were prepared from different parts (whole fish, skin and head) of several discarded species of the North-West Spain fishing fleet using Alcalase. All hydrolysates had moisture and ash contents lower than 10% and 15%, respectively. The fat content of FPH varied between 1.5% and 9.4% and had high protein content (69.8–76.6%). The amino acids profiles of FPH are quite similar and the most abundant amino acids were glutamic and aspartic acids. All FPH exhibited antioxidant activity and those obtained from Atlantic horse mackerel heads presented the highest 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power and Cu2+ chelating activity. On the other hand, hydrolysates from gurnard heads showed the highest ABTS radical scavenging activity and Fe2+ chelating activity. In what concerns the α-amylase inhibitory activity, the IC50 values recorded for FPH ranged between 5.70 and 84.37 mg/mL for blue whiting heads and whole Atlantic horse mackerel, respectively. α-Glucosidase inhibitory activity of FPH was relatively low but all FPH had high Angiotensin Converting Enzyme (ACE) inhibitory activity. Considering the biological activities, these FPH are potential natural additives for functional foods or nutraceuticals.

scholarly journals Phenolic composition and free radical scavenging activity of wine produced from Serbian autochtonous grape variety Prokupac: A model approach

2014 ◽  
Vol 79 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Nebojsa Menkovic ◽  
Jelena Zivkovic ◽  
Katarina Savikin ◽  
Dejan Godjevac ◽  
Gordana Zdunic
Keyword(s):  
Free Radical ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Scavenging Activity ◽  
Phenolic Composition ◽  
Grape Variety ◽  
Etoac Fraction ◽  
Organic Fractions

Phenolic compounds are very important quality parameters of wine because of their impact on colour, taste and health properties. The present study aimed to evaluate the general phenolic composition and free radical scavenging activity of aqueous and organic fractions obtained using liquid/liquid extractions from red wine produced from Serbian autochtonous grape variety Prokupac. Total phenolic contents in different fractions ranged from 48.22 to 289.12 mg GAE/g dry fraction. Phenolic acids (mainly hydroxycinnamic acids) and quercetin-3-glucuronide were the main components of the EtOAc fraction at pH 2.0; catechins, phenolic acids (mainly hydroxybenzoic acids) and quercetin were found in the EtOAc fraction at pH 7.0, while anthocyanins were identified in the aqueous residue after EtOAc extraction. The major anthocyanin extracted into aqueous fraction was malvidin-3-glucoside, while the most abundant non-anthocyanin phenolic compounds from organic fractions were ethyl gallate and trans-caftaric acid. Radical scavenging activity differed significantly among fractions and IC50 values were 138.58 ?g/ml for water fraction, 17.83 and 3.47 ?g/ml for EtOAc fractions at pH 2.0 and pH 7.0, respectively. As the EtOAc fractions were found to be more potent radical scavengers, it could be assumed that non-anthocyanin phenolic compounds were responsible for such activity in Prokupac wine.

scholarly journals Evaluation of Radical Scavenging Activity of Sempervivum tectorum and Corylus avellana Extracts with Different Phenolic Composition

2016 ◽  
Vol 11 (4) ◽  
pp. 1934578X1601100
Author(s):  
Ágnes Alberti ◽  
Eszter Riethmüller ◽  
Szabolcs Béni ◽  
Ágnes Kéry
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Corylus Avellana ◽  
Herbal Remedies ◽  
Scavenging Activity ◽  
Phenolic Composition ◽  
Corylus Avellana L ◽  
Dpph Radical Scavenging

Sempervivum tectorum L. and Corylus avellana L. are traditional herbal remedies exhibiting antioxidant activity and representing diverse phenolic composition. The aim of this study was to reveal the contribution of certain compounds to total radical scavenging activity by studying S. tectorum and C. avellana extracts prepared with solvents of different selectivity for diverse classes of phenolics. Antioxidant activity of S. tectorum and C. avellana samples was determined in the ABTS and DPPH radical scavenging assays, and phenolic composition was evaluated by high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). Correlations between antioxidant activity and phenolic content of houseleek extracts have been revealed. Significant differences regarding antioxidant activity have been shown between S. tectorum 80% (v/v) methanol extract and its fractions. Additionally, synergism among the constituents present together in the whole extract was assumed. Significantly higher radical scavenging activity of hazel extracts has been attributed to the differences in phenolic composition compared with houseleek extracts.

scholarly journals Phenolic composition and anti-DPPH radical scavenging activity of plum wine produced from three plum cultivars

2019 ◽  
Vol 84 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Marko Ljekocevic ◽  
Milka Jadranin ◽  
Jovana Stankovic ◽  
Branko Popovic ◽  
Ninoslav Nikicevic ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Multiple Reaction Monitoring ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Phenolic Composition ◽  
Dpph Radical ◽  
Dpph Radical Scavenging Activity ◽  
Dpph Radical Scavenging

Plum wines made from two cultivars of Prunus domestica L. (Pozegaca and Crvena ranka) and one cultivar of Prunus insititia L. (Trnovaca) were evaluated for their total phenolic and anthocyanin contents. LC?MS/MS analysis based on specific MS transitions in the multiple reaction monitoring (MRM) mode was used for the identification and quantification of selected phenolic compounds. Catechin, chlorogenic and caffeic acids, as well as quercetin, were identified as the main polyphenols in plum wines. The total amount of phenolic compounds ranged from 1.24 to 1.58 g gallic acid equivalent per L. Among the examined wines, the Crvena ranka wine had a higher content of anthocyanins (12.31 mg cyanidin-3-glucoside equivalent per L). The antioxidant capacity of the wines was determined using the DPPH assay. The variations in the physicochemical characteristics, phenolic composition and DPPH radical scavenging activity of these wines are related to differences due to the different plum cultivars used in the preparation of each wine.

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