Eine Suspension von Indigo in 51-proz. Bromwasserstoffsäure liefert bei der Elektrolyse an Kohleanoden 5,5′-Dibrom-indigo in annehmbarer Ausbeute.
Eine Suspension von Indigo(51个项目)。Elektrolyse的Bromwasserstoffsäureliefert位于安讷巴勒Ausbeute的Kohleanoden 5,5'-Dibrom-indigo。
LATEX COMPRISING COLORANT AND METHODS OF MAKING THE SAME
申请人:XEROX CORPORATION
公开号:US20160024276A1
公开(公告)日:2016-01-28
A process includes forming an emulsion comprising a monomer and a colorant, the colorant further including an anionic functional group and a lipophilic counter ion, and polymerizing the monomer to form a latex, the latex includes polymer nanoparticles having the colorant dispersed therein.
Latex comprising colorant and methods of making the same
申请人:XEROX CORPORATION
公开号:US10208186B2
公开(公告)日:2019-02-19
A process includes forming an emulsion comprising a monomer and a colorant, the colorant further including an anionic functional group and a lipophilic counter ion, and polymerizing the monomer to form a latex, the latex includes polymer nanoparticles having the colorant dispersed therein.
Peroxygenase and Oxidase Activities of Dehaloperoxidase-Hemoglobin from <i>Amphitrite ornata</i>
作者:David A. Barrios、Jennifer D’Antonio、Nikolette L. McCombs、Jing Zhao、Stefan Franzen、Andreas C. Schmidt、Leslie A. Sombers、Reza A. Ghiladi
DOI:10.1021/ja500293c
日期:2014.6.4
The marine globin dehaloperoxidase-hemoglobin (DHP) from Amphitrite ornata was found to catalyze the H2O2-dependent oxidation of monohaloindoles, a previously unknown class of substrate for DHP. Using 5-Br-indole as a representative substrate, the major monooxygenated products were found to be 5-Br-2-oxindole and 5-Br-3-oxindolenine. Isotope labeling studies confirmed that the oxygen atom incorporated was derived exclusively from H2O2, indicative of a previously unreported peroxygenase activity for DHP. Peroxygenase activity could be initiated from either the ferric or oxyferrous states with equivalent substrate conversion and product distribution. It was found that 5-Br-3-oxindole, a precursor of the product 5-Br-3-oxindolenine, readily reduced the ferric enzyme to the oxyferrous state, demonstrating an unusual product-driven reduction of the enzyme. As such, DHP returns to the globin-active oxyferrous form after peroxygenase activity ceases. Reactivity with 5-Br-3-oxindole in the absence of H2O2 also yielded 5,5'-Br-2-indigo above the expected reaction stoichiometry under aerobic conditions, and O-2-concentration studies demonstrated dioxygen consumption. Nonenzymatic and anaerobic controls both confirmed the requirements for DHP and molecular oxygen in the catalytic generation of 5,5'-Br-2-indigo, and together suggest a newly identified oxidase activity for DHP.
Holt; Sadler, Proceedings of the Royal Society of London. Series B, Biological sciences, 1958, vol. 148, p. 495,496