Results 71 to 80 of about 157,296 (336)

Photochemical Redox Reactions of 2,6-Dichlorophenolindophenol and Its Use to Detect Photoreduced Quinones

Photochem
Photosynthesis in plants and the electron transport chain in mitochondria are examples of life-sustaining electron transfer processes. The benzoquinones plastoquinone and ubiquinone are key components of these pathways that cycle through their oxidized ...
Meredith G. Warsen, Soren Zimmer, Katherine Phan, Lisa M. Landino   +3 more
doaj   +1 more source

Quinone and non-quinone redox couples in Complex III [PDF]

Journal of Bioenergetics and Biomembranes, 2008
The Q cycle mechanism proposed by Peter Mitchell in the 1970's explicitly considered the modification of ubiquinone two-electron redox properties upon binding to Complex III to match the thermodynamics of the other single-electron redox cofactors in the complex, and guide electron transfer to support the generation of a proton electro-chemical gradient
Zhang, Haibo, Chobot, Sarah E., Osyczka, Artur, Wraight, Colin A., Dutton, P. Leslie, Moser, Christopher C.   +5 more
openaire   +3 more sources

Tailoring the Properties of Functional Materials With N‐Oxides

Advanced Functional Materials, EarlyView.
The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich, Michelle Kobus, Shirin Mesgarha, Erica Moretto, Laurens Grosche, Wolfgang Maison   +5 more
wiley   +1 more source

Diffusion-controlled generation of a proton-motive force across a biomembrane [PDF]

, 2009
Respiration in bacteria involves a sequence of energetically-coupled electron and proton transfers creating an electrochemical gradient of protons (a proton-motive force) across the inner bacterial membrane. With a simple kinetic model we analyze a redox
Anatoly Yu. Smirnov, B. Alberts, D. G. Nicholls, Franco Nori, G. F. Efremov, R. A. Marcus, R. B. Gennis, Sergey E. Savel’ev, U. Weiss, V. P. Skulachev   +9 more
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

ALKALINE WOOD PULPING WITH QUINONE PRESENCE AND ITS INFLUENCE ON QUALITY OF DESIRED PRODUCT USED FOR PACKING PRODUCTION

Наука и техника, 2017
Application of waste liquor at a rate of 25% that contains the used quinone and is applied as an additive has shown that qualitative characteristics of the obtained desired product do not differ from a product while using fresh quinone for pulping of ...
I. I. Karpunin
doaj   +1 more source

2-(1,4-Dioxo-1,4-dihydro-2-naphthyl)-2-methylpropanoic acid [PDF]

, 2007
The sterically crowded title compound, C₁₄H₁₂O₄, crystallizes as centrosymmetric hydrogen-bonded dimers involving the carboxyl groups. The naphthoquinone ring system is folded by 11.5 (1)° about a vector joining the 1,4-C atoms, and the quinone O atoms ...
Dempster-Rivett, Kieran J., Denny, William A., Main, Lyndsay, Nicholson, Brian K.   +3 more
core   +2 more sources

Stabilizing Cationic Palladium Single‐Atom Sites on Heteroatom‐Doped Carbon for Selective Hydrogen Peroxide Electrosynthesis

Advanced Functional Materials, EarlyView.
In this research, it is demonstrated that dual nitrogen and sulfur doping in hollow carbon spheres creates a tunable coordination environment that stabilizes cationic Pd single atoms as robust organometallic complexes, enabling high selectivity and stability for electrochemical hydrogen peroxide production under harsh acidic and peroxide‐rich ...
Guilherme V. Fortunato, Alexander Gunnarson, Hannaneh Hosseini, Xiangyu You, Pallabi Bhuyan, Ji Sik Choi, Hyo Sang Jeon, Xingshen Zhao, Julio C. Lourenço, Sumin Lim, Huize Wang, Ana Guilherme Buzanich, Martin Radtke, Paul Paciok, Marcos R.V. Lanza, Ferdi Schüth, Marc Ledendecker   +16 more
wiley   +1 more source

Protein covalent modification by biologically active quinones [PDF]

Journal of the Serbian Chemical Society, 2004
The avarone/avarol quinone/hydroquinone couple shows considerable antitumor activity. In this work, covalent modification of b-lactoglobulin by avarone and its derivatives as well as by the synthetic steroidal quinone 2,5(10)-estradiene-1,4,17-trione and
MIROSLAV J. GASIC, BOGDAN SOLAJA, DRAGANA MILIC, TATJANA BOZIC, NATASA BOZIC, ZORAN VUJCIC, IRENA NOVAKOVIC, DUSAN SLADIC   +7 more
doaj  

Electrosynthesis of Bioactive Chemicals, From Ions to Pharmaceuticals

Advanced Functional Materials, EarlyView.
This review discusses recent advances in electrosynthesis for biomedical and pharmaceutical applications. It covers key electrochemical materials enabling precise delivery of ions and small molecules for cellular modulation and disease treatment, alongside catalytic systems for pharmaceutical synthesis.
Gwangbin Lee, Sojin Kim, Myeongeun Lee, Kyoungsuk Jin, Jimin Park   +4 more
wiley   +1 more source