New Method To Evaluate Water-Soluble Antioxidant Activity Based on Protein Structural Change

2007 ◽  
Vol 55 (1) ◽  
pp. 165-169 ◽  
Author(s):  
Masaaki Terashima ◽  
Izumi Nakatani ◽  
Ayako Harima ◽  
Sayaka Nakamura ◽  
Masami Shiiba
Keyword(s):  
Antioxidant Activity ◽  
Structural Change ◽  
Water Soluble ◽  
New Method

Verbascum sinaiticum: A Rich Source of Antioxidant Phenylethanoid Glycosides

2020 ◽  
Vol 10 (2) ◽  
pp. 158-162 ◽  
Author(s):  
Humaira Yasmeen Gondal ◽  
Roshan Zamir ◽  
Muhammad Nisar ◽  
Muhammad Iqbal Choudhary
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Aerial Part ◽  
Methanolic Extract ◽  
Water Soluble ◽  
Antioxidant Potential ◽  
Active Fraction ◽  
Phenylethanoid Glycosides ◽  
Active Constituents ◽  
Soluble Part

Background: The genus Verbascum is well documented for its antioxidant potential but Verbascum sinaiticum is comparatively less studied plant. The current study was carried out to search for antioxidant nutraceuticals from this species. Objective: To explore the antioxidant potential of Verbascum sinaiticum and to identify its active constituents. Methods: The methanolic extract of air-dried aerial part of the Verbascum sinaiticum was partitioned with hexane, chloroform and ethyl acetate. The water-soluble part of ethyl acetate afforded six phenylethanoid glycosides by repeated chromatography over Sephadex LH-20, silica gel and ODS columns. Antioxidant activity of solvent extracts and isolated constituents were evaluated by DPPH, ABTS and FRAP assays. Results: Six phenylethanoid glycosides was isolated and characterized as Verbascoside, Eukovoside, Martynoside, Jionoside D, Campneoside I and Campneoside II, from the most active fraction. Conclusion: Verbascum sinaiticum demonstrated prospective antioxidant activity. The watersoluble part of EtOAc (WSEAE) was found the most active extract whereas Verbascoside was identified as the most potent constituent. All isolated compounds exhibited significant antioxidant activity whereas their synergistic effect was found prominent in the parent fraction.

Antioxidant Capacities of Water-Soluble Substances Extracted from JinHua Ham

2014 ◽  
Vol 675-677 ◽  
pp. 1654-1657
Author(s):  
Xiao Li Zhou ◽  
Xu Chen ◽  
Ting Feng Hao ◽  
Yi Ming Zhou ◽  
Ying Xiao
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Antioxidant Capacity ◽  
Mass Fraction ◽  
Water Soluble ◽  
Oxidation Capacity ◽  
Hydroxyl Free Radical ◽  
Antioxidant Capacities ◽  
Dpph Scavenging ◽  
Jinhua Ham

This study was designed to evaluate the antioxidant activity of samples extracted from Jinhua ham by using such chemical assays as DPPH, scavenging hydroxyl free radical and ABTS. The results demonstrate that antioxidant capacity of the extracted sample is lower than oxidation capacity of Vc. The IC50 spot of samples ranges between 0.6 % and 2.5 % (mass fraction of solute).

Coupling of the Triphenylphosphine Moiety to Water-Soluble Polymers: A New Method To Achieve Water-Soluble Metal Phosphine Complexes

1995 ◽  
Vol 14 (5) ◽  
pp. 2593-2596 ◽  
Author(s):  
Torsten Malmstroem ◽  
Hagen Weigl ◽  
Carlaxel Andersson
Keyword(s):  
Water Soluble ◽  
New Method ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Phosphine Complexes

scholarly journals A new method based on guanine rich aptamer structural change for carcinoembryonic antigen detection

Talanta ◽  
2022 ◽  
Vol 236 ◽  
pp. 122867
Author(s):  
Kexin Sun ◽  
Junlong Li
Keyword(s):  
Structural Change ◽  
Carcinoembryonic Antigen ◽  
Antigen Detection ◽  
New Method

Amperometric detection of water-soluble antioxidants in chitosan-based feed additives and in sheep blood serum

2020 ◽  
Vol 1 (4) ◽  
pp. 68-74
Author(s):  
A. A. Savina ◽  
◽  
A. A. Volnin ◽  
N. V. Bogolyubova ◽  
O. A. Voronina ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Blood Serum ◽  
Amperometric Detection ◽  
Feed Additives ◽  
Water Soluble ◽  
High Protein ◽  
Feed Additive ◽  
Microbiological Synthesis ◽  
Sheep Blood ◽  
Amperometric Method

The effects of chitosan on various metabolic and digestive processes in the animal body are an important to study because of the production quality for animal nutrition, healthcare, etc. The major known changes in the biochemical parameters of the animal liquids (by chitosan usage as feed additive) are the following: ratio of volatile and fatty acids, content of fat, mineral composition, etc. The aim of this study was to evaluate the total amount of water-soluble antioxidants (TAWSA) of feed additives based on chitosan and high protein concentrate of microbiological synthesis and to assess the effect of these feed additives on TAWSA values of sheep blood serum by amperometric method. Firstly, the antioxidant activity of feed components based on chitosan or/and a high-protein microbiological synthesis concentrate was studied in this work. Second, the experiments are carried out on 6 fistula animals to confirm the results of laboratory studies. Third, the determination of the total antioxidant activity of sheep blood by using chitosan additives (as the feed components) by amperometric method was carried out. A particular difference in antioxidant activity of the control and experimental samples of the sheep blood was established for the first time.

scholarly journals Pelargonium graveolens Aqueous Decoction: A New Water-Soluble Polysaccharide and Antioxidant-Rich Extract

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Malek Ennaifer ◽  
Taroub Bouzaiene ◽  
Moncef Chouaibi ◽  
Moktar Hamdi
Keyword(s):  
Antioxidant Activity ◽  
Flow Behavior ◽  
Chemical Properties ◽  
Extraction Yield ◽  
Water Soluble ◽  
Pelargonium Graveolens ◽  
Parameters Extraction ◽  
Soluble Polysaccharide ◽  
Dpph Scavenging ◽  
The One

Background. The decoction of Pelargonium graveolens yields an antioxidant-rich extract and a water-soluble polysaccharide. This study aims (1) to investigate the effect of process parameters (extraction time and temperature) on the antioxidant activity of the decoction and the extraction yield of CPGP by response methodology and (2) to study the chemical properties of the optimized decoction and rheological properties of the corresponding extracted polysaccharide. Results. The antioxidant-rich decoction contained about 19.76 ± 0.41 mg RE/g DM of flavonoids and 5.31 ± 0.56 mg CE/gDM of condensed tannins. The crude Pelargonium graveolens polysaccharide (CPGP) contained 87.27 % of sugar. Furthermore, the CPGP solutions (0.5%, 1%, and 2%) exhibited shear-thinning or pseudoplastic flow behavior. A central composite design (CDD) was applied to assess the effects of temperature and time on the antioxidant activity of the decoction, on the one hand, and on water-soluble polysaccharide yield, on the other. The decoction optimization of Pelargonium graveolens aimed to use less energy (93°C for 11 minutes) leading to the highest values of decoction phenolic content (33.01 ±0.49 mg GAE/gDM) and DPPH scavenging activity (136.10 ± 0.62 mg TXE/gDM) and the highest values of CPGP yield (6.97%). Conclusion. The obtained results suggest that the CPGP rheological characteristics are suitable for applications in many industries, especially food. The values of optimal conditions showed that Pelargonium graveolens decoction operation could have multiple uses, especially for consuming less energy.

Process Development of Ergothioneine by Submerged Fermentation of a Novel Medicinal Mushroom Panus Conchatus

2021 ◽  
Author(s):  
Min Zhu ◽  
Yiwen Han ◽  
Xuechao Hu ◽  
Lujing Ren
Keyword(s):  
Antioxidant Activity ◽  
Natural Products ◽  
Cell Growth ◽  
Vitamin C ◽  
Submerged Fermentation ◽  
Process Development ◽  
New Method ◽  
Good Stability ◽  
Medicinal Mushroom ◽  
Depth Study

Abstract Ergothioneine is a natural and safe antioxidant playing an important role in anti-aging and the prevention of various diseases. Mushrooms are the main dietary source of ergothioneine. This study aims to report a kind of medicinal mushroom Panus conchatus with great potential for the bioproduction of ergothioneine. Molasses and soy peptone could promote cell growth of Panus conchatus and enhance the accumulation of ergothioneine. Meanwhile, three precursors of cysteine, histidine and methionine were added to the broth, and the highest ergothioneine concentration of 148.79mg/L was obtained when adding 0.4 g/L cysteine. Finally, the crude ergothioneine extract was purified and further evaluated. The ergothioneine from Panus conchatus showed higher antioxidant activity than vitamin C and glutathione with good stability at lower pH environment. This research would provide a new method for the bioproduction of ergothioneine and lay foundation for the in-depth study about the exploration of natural products from Panus conchatus.

Changes in the total amount of water-soluble antioxidants in the blood serum of Duroc boars depending on the duration of their fattening

2020 ◽  
Vol 1 (12) ◽  
pp. 112-118
Author(s):  
O. A. Voronina ◽  
◽  
A. A. Savina ◽  
N. S. Kolesnik ◽  
N. V. Bogolyubova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Blood Serum ◽  
Water Soluble ◽  
Laboratory Studies ◽  
Blood Samples ◽  
Amperometric Method ◽  
Significant Difference ◽  
Total Antioxidant ◽  
First Time

The influence of fattening conditions on the digestive and metabolic processes in animals is actively studied to increase the production of animal food. The aim of the study was to estimate the total amount of water-soluble antioxidants in the blood serum of Duroc boars depending on the duration of fattening. Experiments were conducted on 102 animals to confirm the results of laboratory studies, as well as determination of the total antioxidant activity of pig blood serum by amperometric method. For the first time, a significant difference in antioxidant activity was found in blood samples of Duroc boars with the duration of their fattening from 81 to 101 days.

scholarly journals Formulation of Ethyl Cellulose Microparticles Incorporated Pheophytin A Isolated from Suaeda vermiculata for Antioxidant and Cytotoxic Activities

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1501 ◽  
Author(s):  
Hamdoon A. Mohammed ◽  
Mohsen S. Al-Omar ◽  
Mahmoud Zaki El-Readi ◽  
Ahmad H. Alhowail ◽  
Maha A. Aldubayan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Ethyl Cellulose ◽  
Cytotoxic Effect ◽  
Reducing Power ◽  
Chloroform Extract ◽  
Water Soluble ◽  
Pheophytin A ◽  
Wide Range ◽  
Mcf 7

Background: This study is designed to discover a method for delivering an efficient potent pheophytin a (pheo-a) into more absorbed and small polymeric ethyl cellulose (EC) microparticles. Methods: Silica gel and Sephadex LH-20 columns were used to isolate pheo-a from the chloroform extract of the edible plant, Suaeda vermiculata. Pheo-a was incorporated into EC microparticles using emulsion-solvent techniques. The antioxidant activity of pheo-a microparticles was confirmed by the level of superoxide radical (SOD), nitric oxide (NO), and reducing power (RP) methods. Meanwhile, the cytotoxic effect of the product was investigated on MCF-7 cells using MTT assay. Results: Pheo-a was isolated from S. vermiculata in a 12% concentration of the total chloroform extract. The structures were confirmed by NMR and IR spectroscopic analysis. The formulated microparticles were uniform, completely dispersed in the aqueous media, compatible as ingredients, and had a mean diameter of 139 ± 1.56 µm as measured by a particle size analyzer. Pheo-a demonstrated a valuable antioxidant activity when compared with ascorbic acid. The IC50 values of pheo-a microparticles were 200.5 and 137.7 µg/mL for SOD, and NO respectively. The reducing power of pheo-a microparticles was more potent than ascorbic acid and had a 4.2 µg/mL for IC50 value. Pheo-a microparticles did not show notable cytotoxicity on the MCF-7 cell line (IC50 = 35.9 µg/mL) compared with doxorubicin (IC50 = 3.2 µg/mL). Conclusions: the results showed that water-soluble pheo-a microparticles were prepared with a valuable antioxidant activity in a wide range of concentrations with a noteworthy cytotoxic effect.

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