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نتایج جستجو برای Quinone

تعداد نتایج: 3591  
Journal: :Cancer research 1990
A Begleiter, M K Leith,

The role of the quinone group in the antitumor activity of quinone alkylating agents, such as mitomycin C and 2,5-diaziridinyl-3,5-bis(carboethoxyamino)-1,4-benzoquinone, is still uncertain. The quinone group may contribute to antitumor activity by inducing DNA strand breaks through the formation of free radicals and/or by influencing the alkylating activity of the quinone alkylators. The cytot...

2006
Asher Begleiter, Marsha K. Leith,

The role of the quinone group in the antitumor activity of quinone alkylating agents, such as mitomycin C and 2,5-diaziridinyl-3,5bis(carboethoxyamino)-l,4-benzoquinone, is still uncertain. The quinone group may contribute to antitumor activity by inducing DNA strand breaks through the formation of free radicals and/or by influencing the alkylating activity of the quinone alkylators. The cytoto...

Journal: :Science 2015
Kaixiang Lin, Qing Chen, Michael R Gerhardt, Liuchuan Tong, Sang Bok Kim, Louise Eisenach, Alvaro W Valle, David Hardee, Roy G Gordon, Michael J Aziz, Michael P Marshak,

Storage of photovoltaic and wind electricity in batteries could solve the mismatch problem between the intermittent supply of these renewable resources and variable demand. Flow batteries permit more economical long-duration discharge than solid-electrode batteries by using liquid electrolytes stored outside of the battery. We report an alkaline flow battery based on redox-active organic molecu...

Journal: :Molecules 2006
Neeranuch Chairungsi, Kanlaya Jumpatong, Patiwat Suebsakwong, Waya Sengpracha, Weerachai Phutdhawong, Duang Buddhasukh,

Some representative quinones, viz. one naphthoquinone (plumbagin) and five anthraquinones (alizarin, purpurin, chrysazin, emodin, and anthrarufin), were subjected to electrocoagulation. It was found that the rate and extent of coagulation of these compounds appears to correlate with the number and relative position of their phenolic substituent groups, and that all of the coagulated quinones co...

Journal: :Biochimica et biophysica acta 1998
G Lenaz,

This review considers the interaction of Complex I with different redox acceptors, mainly homologs and analogs of the physiological acceptor, hydrophobic Coenzyme Q. After examining the physical properties of the different quinones and their efficacy in restoring mitochondrial respiration, a survey ensues of the advantages and drawbacks of the quinones commonly used in Complex I activity determ...

2015
Kaixiang Lin, Qing Chen, Michael R. Gerhardt, Liuchuan Tong, Sang Bok Kim, Louise Eisenach, Alvaro W. Valle, David Hardee, Roy G. Gordon, Michael J. Aziz, Michael P. Marshak, John A. Paulson,

Storage of photovoltaic and wind electricity in batteries could solve the mismatch problem between the intermittent supply of these renewable resources and variable demand. Flow batteries permit more economical long-duration discharge than solid-electrode batteries by using liquid electrolytes stored outside of the battery. We report an alkaline flow battery based on redox-active organic molecu...

Journal: :Biochimica et biophysica acta 1993
K Kano, T Mori, B Uno, M Goto, T Ikeda,

Electrochemical characterization of topa quinone (6-hydroxydopa quinone), the organic cofactor of copper-containing amine oxidases, has been performed with the aid of spectroscopy and ab initio energy minimization technique. Topa quinone exhibits a totally reversible cyclic voltammogram at a mercury electrode, which is ascribed to a two-step one-electron conversion between topa quinone and topa...

2004
Vasili Petrouleas, Antony R. Crofts,

Journal: :Journal of the American Chemical Society 2002
Taotao Ling, Erwan Poupon, Erik J Rueden, Sun H Kim, Emmanuel A Theodorakis,

A unified synthesis of several quinone sesquiterpenes is described herein. Essential to this strategy is a novel radical addition reaction that permits the attachment of a fully substituted bicyclic core 16 to a variably substituted quinone 10. The addition product 15 can be further functionalized, giving access to natural products with a high degree of oxygenation at the quinone unit. The quin...

Journal: :Journal of bacteriology 1985
R Meganathan, R Coffell,

Every Bacillus species so far examined contains menaquinone as the sole quinone. In contrast, the alkalophilic Bacillus alcalophilus has been reported to be unusual in containing ubiquinone rather than menaquinone. In this communication, we demonstrate that B. alcalophilus, like all the other bacilli, contains menaquinone as the only quinone.