scholarly journals Optimization of high-intensity pulsed electric field-assisted extraction of procyanidins from Vitis amurensis seeds using response surface methodology

2020 ◽  
Vol 189 ◽  
pp. 02029
Author(s):  
Zhou Yong Dong ◽  
Hua Hua Wang ◽  
Ming Yue Li ◽  
Wei Liu ◽  
Tie Hua Zhang
Keyword(s):  
Electric Field ◽  
Radical Scavenging ◽  
Extraction Yield ◽  
Pulse Number ◽  
Vitis Amurensis ◽  
Radical Scavenging Capacity ◽  
Assisted Extraction ◽  
Scavenging Capacity ◽  
Total Antioxidant ◽  
Dpph Radical Scavenging

Procyanidins (PC) from Vitis amurensis seeds was extracted using high-intensity pulsed electric field (PEF). The process parameters including pulse number, electric field strength, ratio of material to liquid and ethanol concentration were studied using response surface methodology, and extraction yield of the extracts were determined. Antioxidant activity of the extracts by PEF, ultrasonic-assisted extraction (UAE), microwave-assisted extraction (MAE) and ethanol extraction (EAE) were compared based on total antioxidant capacity, DPPH radical scavenging capacity and ferrous ion chelating activity. The results revealed that the optimization of conditions of PEF are: pulse number 10; electric field strength 25 kV/cm; ratio of material to liquid 1:21 g/mL; ethanol concentration 63% (v/v), and the PC yields reached 8.23% under this condition. The PEF resulted in a highest extraction yield of PC among the four extraction methods. There was no significant difference in total antioxidant capacity of PC obtained by four methods, the DPPH radical scavenging capacity and ferrous ion chelating activity of PC extracted by PEF were close to that of UAE and MAE, which were superior to EAE. These showed that PEF was an effective method for extracting PC.

scholarly journals Analysis of Total Antioxidant Capacities of Various Seaweeds Grown off the Korean Coast (P06-110-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Chai-Hyeon Lee ◽  
Ye-Na Park ◽  
Hyeung-Rak Kim ◽  
Sang Gil Lee ◽  
Bohkyung Kim
Keyword(s):  
Functional Food ◽  
Superoxide Radical ◽  
Radical Scavenging ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Antioxidant Capacities ◽  
Scavenging Capacity ◽  
Total Antioxidant ◽  
Radical Generation ◽  
Dpph Radical Scavenging

Abstract Objectives It has been a long time since seaweeds have been used for food ingredients in Asian countries. Recently, a body of research has revealed the health benefits of bioactive compounds in seaweeds, especially their antioxidant capacities. Although numerous seaweeds inhabit in the ocean, only a small percentage has been explored for functional food. Therefore, the purpose of this study was to analyze the antioxidant capacities of various seaweeds grown off the Korean coast to screen for the potential functional food sources. Methods Ten ethanol extracts of Korean seaweeds were provided by the National Marine Biodiversity Institute of Korea, which included Scytosiphon gracilis, Scytosiphon lomentaria, Sargassum muticum, Sargassum confusum, Petrospongium rugosum, Sargassum fusiforme, Petalonia fascia, Sargassum nigrifolium, Ishige foliacea, and Myelophycus simplex. Hundred mg/L of samples in 80% methanol was used to measure their ABTS, DPPH, and superoxide radical scavenging activities. Mg vitamin C equivalent antioxidant capacity (VCEAC)/100 mg was used to express the ABTS and DPPH radical scavenging capacities. For the superoxide radical scavenging capacity, inhibition rate of superoxide radical generation (%) was calculated. Results Among the ten seaweeds, S. nigrifolium and I. foliacea exhibited the most significant radical scavenging capacities. DPPH radical scavenging capacities of I. foliacea and S. nigrifolium were 122.4 mg VCEAC/100 mg and 95.8 mg VCEAC/100 mg, respectively. For ABTS radical scavenging capacity, I. foliacea exhibited 178.5 mg VCEAC/100 mg, followed by S. nigrifolium as 80.9 mg VCEAC/100 mg. I. foliacea inhibited about 68% of superoxide radical generation followed by S. nigrifolium (40.6%) while vitamin C as positive control inhibited about 28.9% of superoxide radical generation. The antioxidant capacities measured by the three assays were positively correlated with each other. Conclusions The current study explored total antioxidant capacities of various Korean seaweeds and found I. foliacea and S. nigrifolium as the most potential antioxidant-rich food resources. Further research would be warranted to investigate bioactive compounds from S. nigrifolium and I. foliacea. Funding Sources This work was supported by the Pukyong National University Research Fund in 2018.

scholarly journals A simple new method for aged seed utilization based on melatonin-mediated germination and antioxidant nutrient production

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Song Yu ◽  
Xuetian Zhu ◽  
Helin Yang ◽  
Lihe Yu ◽  
Yifei Zhang
Keyword(s):  
Total Phenolics ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Aged Seed ◽  
Phenolics Content ◽  
Dpph Radical Scavenging ◽  
Aged Seeds

AbstractSeed deterioration, coupled with a decrease in nutrients, is unavoidable following long-term storage, and these seeds are therefore used as livestock fodder. Here, we developed a simple, rapid and efficient method of producing high amounts of antioxidants from deteriorated seeds via melatonin-induced germination. Legume seeds were subjected to high humidity at 55 °C for 12–36 h to obtain aged seeds with a 40% germination rate and severely reduced antioxidant nutrition (total phenolics content, ferric reducing power and 1,1-diphenyl-2-picryhydrazyl (DPPH) radical scavenging capacity). Aged seeds were then treated with 0.1 mM melatonin, resulting in the production of sprouts with a higher total phenolics content (fivefold), greater ferric reducing power (sevenfold) and greater DPPH radical scavenging capacity (twofold) compared to the aged seeds. These findings suggest that melatonin treatment efficiently converted aged seed reserve residues into antioxidant nutrients, providing an alternative use for deteriorated seeds in food production.

scholarly journals Synthesis of antioxidative anthraquinones as potential anticancer agents

BIBECHANA ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 143-153
Author(s):  
Richa K. Gupta ◽  
Ganesh M. S. Thakuri ◽  
Gan B Bajracharya ◽  
Ram Narayan Jha
Keyword(s):  
Antibacterial Activity ◽  
Bacillus Subtilis ◽  
Anticancer Agents ◽  
Radical Scavenging ◽  
Antibacterial Activities ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Dpph Radical Scavenging

Antioxidant and antibacterial activities of natural anthraquinones namely chrysophanol (1) and emodin (2), and synthesized anthraquinones viz. 2-methylanthraquinone (3), anthraquinone (4), 2-bromoanthraquinone (5), rubiadin (6), chrysophanol diacetate (7), rubiadin diacetate (8) and 1,8-dimethoxy-3-methylanthraquinone (9) were investigated. Anthraquinones 9, 3, 6, 5 and 2 exhibited a high DPPH• radical scavenging capacity (IC50 = <500 μg/mL) showing their therapeutic potentiality for the treatment of cancers. These anthraquinones 1-9 have also displayed a weak to moderate antibacterial activity against Bacillus subtilis. Chrysophanol diacetate (7) including emodin (2) have been appeared as the valuable antibacterials. BIBECHANA 18 (2) (2021) 143-153

scholarly journals Total Phenolic Content and Antioxidant Activity of Salvia spp. Exudates

2012 ◽  
Vol 7 (2) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Laura Giamperi ◽  
Anahi Bucchini ◽  
Angela Bisio ◽  
Emanuela Giacomelli ◽  
Giovanni Romussi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Dpph Radical Scavenging

The total phenolic content and antioxidant activity of 6 Salvia spp. exudates were measured to find new potential sources of natural antioxidants. Total phenolic content was assessed by a modified Prussian blue method, and the antioxidant activity by two methods: 1,1- diphenyl-2-picryl- hydrazyl (DPPH) radical scavenging capacity assay and lipoxygenase inhibitory assay. The total phenolic content ranged between 1.3 μg/mg DW ( S. fallax) and 74.0 μg/mg DW ( S. cacaliaefolia). In the DPPH test, S. cacaliaefolia was more effective than BHT, while in the inhibition of lipid peroxidation all the extracts presented good antioxidant capacity.

scholarly journals Characteristics of Sunsik, a Cereal-Based Ready-to-Drink Korean Beverage, with Added Germinated Wheat and Herbal Plant Extract

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1654
Author(s):  
Bo Kim ◽  
Seung Park ◽  
Geum-Joung Youn ◽  
Yeon Kwak ◽  
Mi Kim
Keyword(s):  
Response Surface ◽  
Plant Extract ◽  
Radical Scavenging ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Gaba Content ◽  
Dpph Radical Scavenging ◽  
Herbal Plant

The purpose of this study was to develop a formulation of Sunsik with improved health benefits by adding germinated wheat (GW) and herbal plant extract (HPE) using a response surface methodology (RSM). The central composite experimental design (CCD) was used to evaluate the effects of Sunsik with added HPE (2–4%) and GW (10–20%) on total phenolic content (TPC), total flavonoid content (TFC), Trolox equivalent antioxidant capacity (TEAC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, gamma butyric acid (GABA) content, total color changes (△E), browning index (BI), water absorption index (WAI), and water solubility index (WSI). As a result of the CCD, the independent and dependent variables were fitted by the second-order polynomial equation, and the lack of fit for response surface models was not significant except in relation to WSI. The GABA content, TPC, and TEAC were more adequate for a linear model than for a quadratic model, and they might be affected by GW rather than HPE. Alternatively, the TFC, DPPH radical scavenging capacity, WAI, WSI, △E, and BI were fitted with quadratic models. The optimum formulation that could improve antioxidant and physicochemical properties was Sunsik with 3.5% and 20% added HPE and GW, respectively.

scholarly journals Structure, Antioxidant, and Hypoglycemic Activities of Arabinoxylans Extracted by Multiple Methods from Triticale

Antioxidants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 584
Author(s):  
Hong Chen ◽  
Zhuoyun Chen ◽  
Yuanfang Fu ◽  
Jiao Liu ◽  
Siying Lin ◽  
...  
Keyword(s):  
Physiological Function ◽  
Radical Scavenging ◽  
Extraction Methods ◽  
Structural Features ◽  
Molecular Weights ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Scavenging Efficiency ◽  
Dpph Radical Scavenging ◽  
Inhibition Ability

Different methods of isolating arabinoxylans (AXs) from triticale were performed to investigate the extraction methods’ effects on the physiological functions of the AXs. Structural, antioxidant, and hypoglycemic activities were determined. The molecular weights (MWs) of enzyme- or water-extracted AXs were lower than those of alkali-extracted AXs. Opposite trends were shown by the arabinose–xylose ratio. Enzyme-extracted AXs exhibited higher glucose adsorption capacity and hydroxyl radical-scavenging efficiency than alkali-extracted AXs. The α-amylase inhibition ability, DPPH radical-scavenging capacity, and metal-chelating activity of alkali-extracted AXs were higher than those of enzyme-extracted AXs. Water-extracted AXs had the highest glucose dialysis retardation index. In conclusion, extraction methods can influence the physiological function of AXs through their structural features. AXs with higher MWs and esterified ferulic acid (FA) levels had higher antioxidant ability, whereas AXs with higher solubility and free FA level exhibited higher hypoglycemic activity.

Antioxidant and free radical scavenging potential of crude sulphated polysaccharides from Turbinaria ornata

Biologia ◽  
2015 ◽  
Vol 70 (1) ◽  
Author(s):  
M. Manoj Saravana Guru ◽  
Mani Vasanthi ◽  
Anant Achary
Keyword(s):  
Free Radical ◽  
Superoxide Radical ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Antioxidant Power ◽  
Sulphated Polysaccharides ◽  
Turbinaria Ornata ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Total Antioxidant

AbstractThe sulphated polysaccharides from brown algae have been attracting extensive interest due to their numerous biological activities. The present study was designed to evaluate the antioxidant activity and free-radical scavenging capacity of crude sulphated polysaccharides (CSP) from Turbinaria ornata, a marine brown algae. The CSP was extracted from T. ornata using hot water with the yield of 14.31% (w/w). The chemical composition analysis of CSP showed 71.07 ± 4.61 % of total sugar, 1.81 ± 0.035 % total protein, 27 ± 1.49 % sulphate, and 6.16 ± 0.36 % total phenol. The presence of sulphated polysaccharides in the CSP was confirmed by agarose gel electrophoresis. The in vitro antioxidant activity of CSP was evaluated using total antioxidant power assay and ferric reducing antioxidant power assay (FRAP). The results revealed that the total antioxidant capacity of CSP was 22.205 ± 0.875 (equivalent mg of ascorbic acid/g of CSP) and 0.556 ± 0.03 (mM of FeSO4/mg of CSP) FRAP value, respectively. The free-radical scavenging ability of CSP was demonstrated using 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and superoxide radical. The capacity of the CSP to scavenge 50% of free radicals was found to be 88.71 ± 1.01, 440.07 ± 4.43 and 352 ± 4.58 μg/mL for ABTS, DPPH and superoxide radical, respectively. These results showed that the CSP from T. ornata possess antioxidant and free-radical scavenging capacity.

scholarly journals Characteristics and Valorization Potential of Fermentation Waste of Greengage (Prunus mume)

2021 ◽  
Vol 11 (18) ◽  
pp. 8296
Author(s):  
Jing Wang ◽  
Jingluan Wang ◽  
Chongde Wu ◽  
Jun Huang ◽  
Rongqing Zhou ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Food Additives ◽  
Radical Scavenging ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Medicinal Value ◽  
Scavenging Capacity ◽  
Waste Extract ◽  
Dpph Radical Scavenging ◽  
Antibacterial Capacity

Greengage wine is gaining increasing attention in Asia for its rich nutritional elements and medicinal value. However, the treatment of the fermentation waste after brewing is a problem that remains unsolved. This work proposed to valorize the fermentation waste extract by a simple centrifugation. The bioactive compounds of the fermentation waste were investigated, including total flavonoids, total phenols, specific phenols and volatile compounds. The antioxidant and antibacterial capacities of the waste extract were also evaluated. The results revealed that the total phenol (1.34 mg GAE/g EPW) and total flavonoid (1.17 mg RE/g EPW) of the fermentation waste extract were still considerable. The fermentation waste also showed high DPPH radical scavenging capacity (5.39 μmol TE/g EPW) and high ABTS radical scavenging capacity (9.80 μmol TE/g EPW). Both GC-MS and LC-MS analysis identified key bioactive compounds, such as linalool, terpineol, β-ionone, neochlorogenic acid and chlorogenic acid, which have high antioxidant capacity and strong, thermal-stable antibacterial capacity. All these characteristics show a promising future for valorized fermentation waste, for example, in food additives or mouthwash.

scholarly journals Antioxidant, antifungal and anticancer activities of se-enriched Pleurotus spp. mycelium extracts

2014 ◽  
Vol 66 (4) ◽  
pp. 1379-1388 ◽  
Author(s):  
Ivan Milovanovic ◽  
Mirjana Stajic ◽  
Jasmina Cilerdzic ◽  
Tatjana Stanojkovic ◽  
Aleksandar Knezevic ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Inhibitory Concentration ◽  
Radical Scavenging ◽  
Pleurotus Eryngii ◽  
Dpph Radical ◽  
Anticancer Activities ◽  
Radical Scavenging Capacity ◽  
Low Concentrations ◽  
Scavenging Capacity ◽  
Dpph Radical Scavenging

The goal of this study was the evaluation of antifungal, antioxidant and anticancer potentials of Pleurotus eryngii, P. ostreatus and P. pulmonarius mycelial extracts, and the influence of mycelium enrichment with selenium on these activities. Both Se-amended and non-amended extracts showed the same or similar minimal inhibitory concentration for 14 studied micromycetes, while a fungicidal effect was not noted, contrary to ketoconazole, which had inhibitory and fungicidal effects at very low concentrations. Se-non-amended extracts exhibited antioxidant activity, especially at higher concentrations. Selenium enrichment influenced activity, its effects decreasing in P. eryngii and P. pulmonarius, while in P. ostreatus no effect was noted. The DPPH? radical scavenging capacity of the extracts was in direct correlation with their phenol and flavonoid contents. Cytotoxic activity against both HeLa and LS174 cell lines was very low compared with cis-DDP. These features suggest that mycelium should be an object of intensive studies.

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