Environmentally benign multiphase solid–liquid–gas catalysis

2020 ◽  
Vol 22 (3) ◽  
pp. 895-902
Author(s):  
Xueli Bai ◽  
Nianze Song ◽  
Liang Wen ◽  
Xin Huang ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Molecular Oxygen ◽  
Environmentally Benign ◽  
Oxidation Reactions ◽  
Solid Liquid

It is significant for the environment that molecular oxygen replaces conventional heavy metal-containing or toxic oxidants to participate in oxidation reactions.

Advances in understanding the nutritional value of antioxidants in wheat

2021 ◽  
pp. 29-72
Author(s):  
Franklin Brian Apea-Bah ◽  
◽  
Trust Beta ◽  
Keyword(s):  
Heavy Metal ◽  
Free Radicals ◽  
Phenolic Compounds ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Environmental Pollutants ◽  
Physiological System ◽  
Antioxidant Protection ◽  
Oxidation Reactions ◽  
Oxidant Effect

Whole grain wheat has a diverse supply of hydrophilic and lipophilic antioxidants which include phenolic compounds (phenolic acids, flavonoids, anthocyanins which are present only in pigmented wheat, alkylresorcinols, and to a lesser extent proanthocyanidins), carotenoids (mainly lutein and zeaxanthin) and tocochromanols (α, β, γ and δ - tocopherols and tocotrienols). This diversity of antioxidants function to protect consumers from radical-induced oxidative damage caused by various free radicals produced endogenously from metabolic processes and exogenously from sunlight and other chemicals and environmental pollutants. They also chelate metal ions which could catalyze oxidation reactions in the physiological system, thereby providing antioxidant protection. However, phenolic compounds might exert pro-oxidant effect when bound to heavy metal ions. This effect could be prevented by the diverse antioxidant system in wheat.

scholarly journals Demonstration of two 3,3'-diaminobenzidine oxidation reactions associated with photosynthetic membranes in anaerobic light-grown Rhodospirillum rubrum.

1977 ◽  
Vol 25 (11) ◽  
pp. 1264-1268 ◽  
Author(s):  
F J Stevens ◽  
H S Pankratz ◽  
R L Uffen
Keyword(s):  
Molecular Oxygen ◽  
White Light ◽  
Rhodospirillum Rubrum ◽  
Oxidation Reactions ◽  
Photosynthetic Membranes ◽  
Dependent Activity ◽  
Two Systems

Photosynthetic membranes of anaerobic light-grown Rhodospirillum rubrum oxidized 3,3'-diaminobenzidine. When glutaraldehyde-treated cells were exposed to 3,3'-diaminobenzidine in the light aerobically, the oxidation appeared to occur by two systems. One reaction was stimulated by white light and the second required molecular oxygen. The O2-dependent activity was inhibited by KCN.

Biomimetic flavin-catalysed reactions for organic synthesis

2015 ◽  
Vol 13 (28) ◽  
pp. 7599-7613 ◽  
Author(s):  
H. Iida ◽  
Y. Imada ◽  
S.-I. Murahashi
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Organic Synthesis ◽  
Environmentally Benign ◽  
Wide Scope ◽  
Biomimetic Catalysts ◽  
Mild Conditions ◽  
Related Compounds

Using simple riboflavin related compounds as biomimetic catalysts, catalytic oxidation of various substrates with hydrogen peroxide or molecular oxygen can be performed selectively under mild conditions. The principle of these reactions is fundamental and will provide a wide scope for environmentally benign future practical methods.

Atom-economical selenation of electron-rich arenes and phosphonates with molecular oxygen at room temperature

2018 ◽  
Vol 16 (47) ◽  
pp. 9243-9250 ◽  
Author(s):  
Samir Kumar Bhunia ◽  
Pritha Das ◽  
Ranjan Jana
Keyword(s):  
Molecular Oxygen ◽  
Room Temperature ◽  
Environmentally Benign

An environmentally benign selenation of electron-rich arenes and phosphonates is developed adopting a novel recycle–reuse–reduce strategy for selenol by oxygen.

scholarly journals Metal-free oxidative coupling of arylmethylamines with indoles: a simple, environmentally benign approach for the synthesis of 3,3′-bis(indolyl)methanes

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23254-23262
Author(s):  
Vikas D. Kadu ◽  
Sankala Naga Chandrudu ◽  
Mahesh G. Hublikar ◽  
Dattatraya G. Raut ◽  
Raghunath B. Bhosale
Keyword(s):  
Molecular Oxygen ◽  
Oxidative Coupling ◽  
Environmentally Benign ◽  
Metal Free

The efficient metal-free oxidative coupling of arylmethylamines with indoles has been developed using molecular oxygen as a green oxidant towards a novel rout of 3,3′-bis(indolyl)methanes (BIMs) synthesis.

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