scholarly journals Direct and Indirect Detoxification Effects of Humic Substances

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 198
Author(s):  
Lydia Bondareva ◽  
Nadezhda Kudryasheva
Keyword(s):  
Humic Substances ◽  
Natural Transformation ◽  
Antioxidant Properties ◽  
Ease Of Use ◽  
Water Soluble ◽  
Main Criterion ◽  
Protective Response ◽  
Protective Function ◽  
Bioluminescent Bacteria ◽  
Detoxification Mechanisms

The review summarizes studies on the detoxification effects of water-soluble humic substances (HS), which are products of the natural transformation of organic substances in soils and bottom sediments that serve as natural detoxifying agents in water solutions. The detoxifying effects of HS on microorganisms are quite complex: HS neutralize free pollutants (indirect bioeffects) and also stimulate the protective response of organisms (direct bioeffects). Prospects and potential problems of bioluminescent bacteria-based assay to monitor toxicity of solutions in the presence of HS are discussed. The main criterion for the bioassay application is versatility and ease of use. The detoxification efficiency of HS in different pollutant solutions was evaluated, and the detoxification mechanisms are discussed. Particular attention was paid to the direct and complex direct + indirect effects of HS. The review focuses on the protective function of HS in solutions of radionuclides and salts of stable metals, with special consideration of the antioxidant properties of HS.

Antioxidant properties of merlot wines in water soluble and lipid soluble free radical generating systems

2000 ◽  
Vol 151 (1) ◽  
pp. 309
Author(s):  
R.S. Faustino ◽  
S. Sobrattee ◽  
T.A. Clark ◽  
G.N. Pierce
Keyword(s):  
Free Radical ◽  
Antioxidant Properties ◽  
Water Soluble

scholarly journals Antioxidant Properties of Water-Soluble Gum from Flaxseed Hulls

Antioxidants ◽  
2016 ◽  
Vol 5 (3) ◽  
pp. 26 ◽  
Author(s):  
Fatma Bouaziz ◽  
Mohamed Koubaa ◽  
Francisco Barba ◽  
Shahin Roohinejad ◽  
Semia Chaabouni
Keyword(s):  
Antioxidant Properties ◽  
Water Soluble

Differential antioxidant properties of red wine in water soluble and lipid soluble peroxyl radical generating systems

2004 ◽  
Vol 263 (1/2) ◽  
pp. 211-215 ◽  
Author(s):  
R.S. Faustino ◽  
T.A. Clark ◽  
S. Sobrattee ◽  
M.P. Czubryl ◽  
G.N. Pierce
Keyword(s):  
Red Wine ◽  
Peroxyl Radical ◽  
Antioxidant Properties ◽  
Water Soluble

scholarly journals Solid-state studies and antioxidant properties of the γ-cyclodextrin·fisetin inclusion compound

2017 ◽  
Vol 13 ◽  
pp. 2138-2145 ◽  
Author(s):  
Joana M Pais ◽  
Maria João Barroca ◽  
Maria Paula M Marques ◽  
Filipe A Almeida Paz ◽  
Susana S Braga
Keyword(s):  
Inclusion Compound ◽  
Antioxidant Properties ◽  
Physicochemical Analysis ◽  
Water Soluble ◽  
Solid Inclusion ◽  
Human Consumption ◽  
X Ray Diffraction ◽  
Wide Range ◽  
Soluble Solid ◽  
Cp Mas Nmr

Fisetin is a natural antioxidant with a wide range of nutraceutical properties, including antidiabetic, neuroprotecting, and suppression or prevention of tumors. The present work describes the preparation of a water-soluble, solid inclusion compound of fisetin with gamma-cyclodextrin (γ-CD), a cyclic oligosaccharide approved for human consumption. A detailed physicochemical analysis of the product is carried out using elemental analysis, powder X-ray diffraction (PXRD), Raman, infrared and 13C{1H} CP-MAS NMR spectroscopies, and thermal analysis (TGA) to verify fisetin inclusion and to present a hypothetical structural arrangement for the host–guest units. The antioxidant activity of the γ-CD·fisetin inclusion compound is evaluated by the DPPH assay.

scholarly journals Analysis of biochemical composition and antioxidant properties of nuts sold in the consumer marke

2020 ◽  
Vol 82 (2) ◽  
pp. 124-130
Author(s):  
L. P. Nilova ◽  
S. M. Malyutenkova
Keyword(s):  
Fatty Acids ◽  
Vitamin E ◽  
Phenolic Compounds ◽  
Biochemical Composition ◽  
Unsaturated Fatty Acids ◽  
Antioxidant Properties ◽  
Water Soluble ◽  
Total Phenolic ◽  
Consumer Market ◽  
Triton X

The results of studies of the biochemical composition and antioxidant properties of nuts sold in the consumer market of St. Petersburg were presented in the work. The objects of research were kernels of nuts: sweet almonds, hazelnuts, cashews, walnuts. Total Soxhlet lipids, fatty acid composition, vitamin E, fractional composition of tocopherols and phytosterols, total phenolic compounds and flavonoids, antioxidant activity by FRAP with ferric chloride, o-phenanthroline and Triton X 100 were determined in nuts. Nuts varied in lipid content (42.6–65.4%) with a predominance of unsaturated fatty acids from 80.4 to 92.4 relative%. Oleic acid prevailed in the fatty acids of almonds, hazelnuts and cashews, while linoleic acid prevailed in walnuts. Walnuts contained the highest amount of polyunsaturated fatty acids. The antioxidant properties of nuts were formed by a complex of water and fat-soluble antioxidants. Fat-soluble antioxidants included vitamin E with a predominance of ?-tocopherol in the kernels of sweet almonds and hazelnuts, ?-tocopherol - in walnuts and cashews. Only sweet almond kernels contained all the tocopherol fractions. ?- and ?-tocopherols were absent in hazelnut lipids, while ?-tocopherols were absent in cashews and walnuts. ?-sitosterol, campesterol and stigmasterol with a predominance of ?-sitosterol were identified in the composition of phytosterols in all nut kernels. Water-soluble antioxidants are mainly represented by phenolic compounds, the amount of which varies widely depending on the type of nuts: cashews

Antioxidant properties of water-soluble polysaccharides from Antrodia cinnamomea in submerged culture

2007 ◽  
Vol 104 (3) ◽  
pp. 1115-1122 ◽  
Author(s):  
Ming-Chi Tsai ◽  
Tuzz-Ying Song ◽  
Ping-Hsiao Shih ◽  
Gow-Chin Yen
Keyword(s):  
Submerged Culture ◽  
Antioxidant Properties ◽  
Water Soluble ◽  
Antrodia Cinnamomea

scholarly journals Apple Pomace Extract as a Sustainable Food Ingredient

Antioxidants ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 189 ◽  
Author(s):  
Pedro A. R. Fernandes ◽  
Sónia S. Ferreira ◽  
Rita Bastos ◽  
Isabel Ferreira ◽  
Maria T. Cruz ◽  
...  
Keyword(s):  
Solid Phase ◽  
Antioxidant Properties ◽  
Water Extract ◽  
Apple Pomace ◽  
Water Soluble ◽  
Hot Water ◽  
Array Detector ◽  
Food Ingredient ◽  
Sustainable Solutions

Apple pomace is a by-product of apple processing industries with low value and thus frequent disposal, although with valuable compounds. Acidified hot water extraction has been suggested as a clean, feasible, and easy approach for the recovery of polyphenols. This type of extraction allowed us to obtain 296 g of extract per kg of dry apple pomace, including 3.3 g of polyphenols and 281 g of carbohydrates. Ultrafiltration and solid-phase extraction using C18 cartridges of the hot water extract suggested that, in addition to the apple native polyphenols detected by ultra-high-pressure liquid chromatography coupled to a diode-array detector and mass spectrometry UHPLC-DAD-ESI-MSn, polyphenols could also be present as complexes with carbohydrates. For the water-soluble polyphenols, antioxidant and anti-inflammatory effects were observed by inhibiting chemically generated hydroxyl radicals (OH•) and nitrogen monoxide radicals (NO•) produced in lipopolysaccharide-stimulated macrophages. The water-soluble polyphenols, when incorporated into yogurt formulations, were not affected by fermentation and improved the antioxidant properties of the final product. This in vitro research paves the way for agro-food industries to achieve more diversified and sustainable solutions towards their main by-products.

scholarly journals Antioxidant Properties of Fullerene Derivatives Depend on Their Chemical Structure: A Study of Two Fullerene Derivatives on HELFs

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Vasilina Sergeeva ◽  
Olga Kraevaya ◽  
Elizaveta Ershova ◽  
Larisa Kameneva ◽  
Elena Malinovskaya ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Chemical Structure ◽  
Antioxidant Properties ◽  
Water Soluble ◽  
Lung Fibroblasts ◽  
Human Embryonic Lung ◽  
Fullerene Derivatives ◽  
The Past ◽  
Wide Range ◽  
Short Times

Oxidative stress is a major issue in a wide number of pathologies (neurodegenerative, cardiovascular, immune diseases, and cancer). Because of this, the search for new antioxidants is an important issue. One of the potential antioxidants that has been enthusiastically discussed in the past twenty years is fullerene and its derivatives. Although in aqueous solutions fullerene derivatives have shown to be antioxidants, their properties in this regard within the cells are controversially discussed. We have studied two different water-soluble fullerene C60 and C70 derivatives on human embryonic lung fibroblasts at a wide range of concentrations. Both of them cause a decrease in cellular ROS at short times of incubation (1 hour). Their prolonged action, however, is fundamentally different: derivative GI-761 causes secondary oxidative stress whereas derivative VI-419-P3K keeps ROS levels under control values. To gain a better understanding of this effect, we assessed factors that could play a role in the response of cells to fullerene derivatives. Increased ROS production occurred due to NOX4 upregulation by GI-761. Derivative VI-419-P3K activated the transcription of antioxidant master regulator NRF2 and caused its translocation to the nucleus. This data suggests that the antioxidant effect of fullerene derivatives depends on their chemical structure.

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