Electrode potentials of partially reduced oxygen species, from dioxygen to water

Koppenol, Willem H.; Stanbury, David M.; Bounds, Patricia L.

doi:10.1016/j.freeradbiomed.2010.04.011

Cited by 347 publications

(269 citation statements)

References 94 publications

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“…These compounds are often referred to as reactive oxygen species (ROS), although only the hydroxyl radical is indiscriminately reactive and able to initiate a wide variety of radical oxidations by radical addition to, or hydrogen abstraction from biomolecules [2]. Phospholipids, especially those containing di-unsaturated or polyunsaturated fatty acids (PUFAs), are primary targets of attack by hydroxyl radicals or other downstream radicals, and are modified to a wide variety of oxidized products in a process called lipid peroxidation.…”

Section: Introductionmentioning

confidence: 99%

Chemistry and analysis of HNE and other prominent carbonyl-containing lipid oxidation compounds

Sousa

Pitt

Spickett

2017

Free Radical Biology and Medicine

131

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The process of lipid oxidation generates a diverse array of small aldehydes and carbonyl-containing compounds, which may occur in free form or esterified within phospholipids and cholesterol esters. These aldehydes mostly result from fragmentation of fatty acyl chains following radical oxidation, and the products can be subdivided into alkanals, alkenals (usually D,β-unsaturated), γ-substituted alkenals and bis-aldehydes.Isolevuglandins are non-fragmented di-carbonyl compounds derived from H 2 -isoprostanes, and oxidation of the ω-3-fatty acid docosahexenoic acid yield analogous 22 carbon neuroketals. Non-radical oxidation by hypochlorous acid can generate D-chlorofatty aldehydes from plasmenyl phospholipids. Most of these compounds are reactive and have generally been considered as toxic products of a deleterious process. The reactivity is especially high for the D,β-unsaturated alkenals, such as acrolein and crotonaldehyde, and for γ-substituted alkenals, of which 4-hydroxy-2-nonenal and 4-oxo-2-nonenal are best Page | 2 known. Nevertheless, in recent years several previously neglected aldehydes have been investigated and also found to have significant reactivity and biological effects; notable examples are 4-hydroxy-2-hexenal and 4-hydroxy-dodecadienal. This has led to substantial interest in the biological effects of all of these lipid oxidation products and their roles in disease, including proposals that HNE is a second messenger or signalling molecule.However, it is becoming clear that many of the effects elicited by these compounds relate to their propensity for forming adducts with nucleophilic groups on proteins, DNA and specific phospholipids. This emphasizes the need for good analytical methods, not just for free lipid oxidation products but also for the resulting adducts with biomolecules. The most informative methods are those utilizing HPLC separations and mass spectrometry, although analysis of the wide variety of possible adducts is very challenging. Nevertheless, evidence for the occurrence of lipid-derived aldehyde adducts in biological and clinical samples is building, and offers an exciting area of future research. AbbreviationsAcr-dG, 1,N2-propanodeoxyguanosine; AGEs, advanced glycation end-product; ALEs, advanced lipoxidation end product; ApoB100, apolipoprotein B100; ApoE, apolipoprotein E; ARP, aldehyde reactive probe; AspN, endoproteinase AspN (flavastacin); βLG, β-lactoglobulin; BHZ, biotin hydrazide; BN-PAGE, blue native polyacrylamide gel

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Section: Introductionmentioning

confidence: 99%

Chemistry and analysis of HNE and other prominent carbonyl-containing lipid oxidation compounds

Sousa

Pitt

Spickett

2017

Free Radical Biology and Medicine

131

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“…1 O 2 is a strong oxidant with standard reduction potential of E h = 1.52 V [22]. It is usually produced by photocatalytic activation of dissolved oxygen on metal oxides such as TiO 2 and ZnO [23,24].…”

Section: Introductionmentioning

confidence: 99%

Cyanide oxidation by singlet oxygen generated via reaction between H 2 O 2 from cathodic reduction and OCl − from anodic oxidation

Tian¹,

Zeng

et al. 2016

Journal of Colloid and Interface Science

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“…This could be ascribed to more selectivity and less oxidative ability of 1 O 2 generated in the DO process. 46 In this regard, the DO process has not maximized the quality of the simulated treated dye wastewater (i.e., CV solution), in terms of TOC, and in practice this could result in failure to satisfy discharge standards. Although the •OH radicals generated in the PC process promote the degradation of a wide range of contaminants efficiently, 2 dye Considering the incomplete degradation/mineralization achieved by the DO and PC processes individually, the efficiency of treating a CV solution (130 mg/L) by the sequential use of DO (10 min) and then PC (20 min) processes was conducted to investigate the combined effect on TOC and color removal performance.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Degradation of Organic Dyes via Bismuth Silver Oxide Initiated Direct Oxidation Coupled with Sodium Bismuthate Based Visible Light Photocatalysis

Yang

Liu

et al. 2012

Environ. Sci. Technol.

159

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Organic dye degradation was achieved via direct oxidation by bismuth silver oxide coupled with visible light photocatalysis by sodium bismuthate. Crystal violet dye decomposition by each reagent proceeded via two distinct pathways, each involving different active oxygen species. A comparison of each treatment method alone and in combination demonstrated that using the combined methods in sequence achieved a higher degree of degradation, and especially mineralization, than that obtained using either method alone. In the combined process direct oxidation acts as a pretreatment to rapidly bleach the dye solution which substantially facilitates subsequent visible light photocatalytic processes. The integrated sequential direct oxidation and visible light photocatalysis are complementary manifesting a > 100% increase in TOC removal, compared to either isolated method. The combined process is proposed as a novel and effective technology based on one primary material, sodium bismuthate, for treating wastewaters contaminated by high concentrations of organic dyes.

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Electrode potentials of partially reduced oxygen species, from dioxygen to water

Cited by 347 publications

References 94 publications

Chemistry and analysis of HNE and other prominent carbonyl-containing lipid oxidation compounds

Chemistry and analysis of HNE and other prominent carbonyl-containing lipid oxidation compounds

Cyanide oxidation by singlet oxygen generated via reaction between H 2 O 2 from cathodic reduction and OCl − from anodic oxidation

Degradation of Organic Dyes via Bismuth Silver Oxide Initiated Direct Oxidation Coupled with Sodium Bismuthate Based Visible Light Photocatalysis

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