Fenton-like reaction system with an analyte-activated catfish effect for enhanced colorimetric and photothermal dopamine bioassay

The Analyst ◽  
2020 ◽  
Author(s):  
Zhengrong Niu ◽  
Hong-Hong Rao ◽  
Xin Xue ◽  
Mingyue Luo ◽  
Xiuhui Liu ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Advanced Oxidation Processes ◽  
Reaction System ◽  
Reactive Oxygen ◽  
Advanced Oxidation ◽  
Oxygen Species ◽  
Reaction Systems ◽  
Oxidation Processes

Fenton-like reaction systems have been proven to be more efficient as the powerful promoters in advanced oxidation processes (AOPs) due to their resultantly generated reactive oxygen species (ROS) such as...

Possible role of free oxidation processes in the regulation of reactive oxygen species production in plant mitochondria

2003 ◽  
Vol 31 (6) ◽  
pp. 1316-1317 ◽  
Author(s):  
V.N. Popov
Keyword(s):  
Reactive Oxygen Species ◽  
Electron Transport ◽  
Electron Transport Chain ◽  
Plant Mitochondria ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Oxidation Processes ◽  
Transport Chain ◽  
Electron Reduction ◽  
Species Production

The non-coupled substrate oxidation mediated by components of the electron transport chain that are not coupled to energy accumulation (such as plant alternative oxidase and rotenone-insensitive NADH dehydrogenases) and uncoupled respiration are peculiar features of plant mitochondria. The physiological significance of such energy-wasting oxidation processes is still debated. It is proposed that non-coupled oxidation could regulate the level of reduction of components of the electron transport chain and the rate of one-electron reduction of oxygen, thereby affecting the rate of formation of reactive oxygen species.

scholarly journals Metal-Free Fenton-like Photocatalysts Based on Covalent Organic Frameworks

2021 ◽  
Author(s):  
Qiaobo Liao ◽  
Can Ke ◽  
Dongni Wang ◽  
Yiying Zhang ◽  
Qingwen Han ◽  
...  
Keyword(s):  
Fenton Reaction ◽  
High Stability ◽  
Advanced Oxidation Processes ◽  
Superoxide Radical ◽  
Advanced Oxidation ◽  
Oxygen Species ◽  
Oxidation Processes ◽  
Metal Free ◽  
Layer Stacking ◽  
Opening Up

The Fenton reaction is one of the most efficient and widely used advanced oxidation processes for remediating the ever-growing water pollution. Metal-free photocatalysts for Fenton-like reactions have gathered enormous scientific interest for their advantages including board pH operation range and high stability. Herein, we demonstrate a metal-free covalent organic framework (COF)-based standalone photocatalyst with superior reactivity and reusability for Fenton-like reactions at acid and neutral pH solutions, which can be attributed to its large porosity, high density of the photoactive triazine moiety, vertical π arrays formed by eclipsed layer stacking and the <i>β</i>‑ketoenamine linkage. Our experiments showed that the photocatalyst can absorb visible light effectively for activation of H<sub>2</sub>O<sub>2</sub>, producing abundant reactive oxygen species including superoxide radical (O<sub>2</sub><sup>·-</sup>), hydroxyl radical (<sup>·</sup>OH), and singlet oxygen (<sup>1</sup>O<sub>2</sub>) for oxidizing organic pollutants. This work not only provides an efficient metal-free photocatalyst for Fenton-like reactions, but also paves the way for COFs towards advanced oxidation processes, opening up the possibilities to their future applications in industry.

Photo-oxidation processes, properties of DOC, reactive oxygen species (ROS), and their potential impacts on native biota and carbon cycling in the Rio Negro (Amazonia, Brazil)

Hydrobiologia ◽  
2016 ◽  
Vol 789 (1) ◽  
pp. 7-29 ◽  
Author(s):  
Ora E. Johannsson ◽  
D. Scott Smith ◽  
Helen Sadauskas-Henrique ◽  
Giselle Cimprich ◽  
Chris M. Wood ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Carbon Cycling ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Photo Oxidation ◽  
Oxidation Processes ◽  
Rio Negro

Enhanced stability of antimicrobial bamboo fiber by launching ultra fine silver particles in a sodium dodecyl sulfate microemulsion system

2016 ◽  
Vol 87 (20) ◽  
pp. 2505-2512 ◽  
Author(s):  
Guanghui Qin ◽  
Jian Liu ◽  
Yong Xue ◽  
Jiajia Ding ◽  
Naizhong Huang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Sodium Dodecyl ◽  
Reaction System ◽  
Reactive Oxygen ◽  
Aqueous System ◽  
Nano Particles ◽  
Microemulsion System ◽  
Oxygen Species ◽  
Silver Particles ◽  
Ag Particles

Currently, the antimicrobial textile market is emerging and has rapidly developed to meet the inherent demands placed on public hygiene. Silver (Ag) is an efficient antimicrobial due to its direct function with the cellular membrane of probe samples. The application of Ag in the textile industry is limited due to its poor stability in repeatedly washing. In this study we synthesized a kind of novel antibacterial fiber containing nano-size silver particles in a reversed emulsion reaction system. The Ag nano-particles are incorporated onto the bamboo fibers solidly through primitive oxidation by sodium periodate. The identification, dependent on Staphylococcus aureus, was implemented to check the influence of the reaction conditions on the antimicrobial property. Meanwhile, reactive oxygen species and the leakage of cytoplasmic contents were focused on investigating the antimicrobial mechanism. The antimicrobial assay suggested that samples from inversed micelle and aqueous system own the comparative antibacterial activity. However, samples from an emulsion system could maintain a better bactericidal property than samples from an aqueous system. Meanwhile, the reactive oxygen species and ultraviolet absorption show the same trend consistent with the antibacterial result. This result might be explained by the morphology and size of Ag particles attached on cellulose surface, which was proved by scanning electron microscopy and energy dispersive spectroscopy. It was revealed that the surface-to-volume ratio of Ag particles played a more crucial role in achieving higher antimicrobial activity than the mass. This approach will provide a practical solution for the synthesis of wash-durable antimicrobial substances.

Percarbonate mediated advanced oxidation completely degrades recalcitrant pesticide imidacloprid: Role of reactive oxygen species and transformation products

2020 ◽  
Vol 250 ◽  
pp. 117269 ◽  
Author(s):  
Michael M. Sablas ◽  
Mark Daniel G. de Luna ◽  
Sergi Garcia-Segura ◽  
Chiu-Wen Chen ◽  
Chih-Feng Chen ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Advanced Oxidation ◽  
Transformation Products ◽  
Oxygen Species
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