Results 31 to 40 of about 140,323 (303)

Energy conversion in Purple Bacteria Photosynthesis [PDF]

, 2011
The study of how photosynthetic organisms convert light offers insight not only into nature's evolutionary process, but may also give clues as to how best to design and manipulate artificial photosynthetic systems -- and also how far we can drive natural
Caycedo-Soler, Felipe, Johnson, Neil F., Quiroga, Luis, Rodriguez, Ferney J., Zhao, Guannan   +4 more
core   +2 more sources

Characterization of a Reductively-Activated Elimination Pathway Relevant to the Biological Chemistry of the Kinamycins and Lomaiviticins [PDF]

, 2012
The lomaiviticins (1 and 2) and kinamycins (3–5) are bacterial metabolites with potent antimicrobial and antiproliferative activities. Herein we establish that 1–5 are capable of generating electrophilic acylfulvene intermediates (6) under mildly ...
Ding, Weidong, Ellestad, George A., Herzon, Seth B., Mulcahy, Seann P., Woo, Christina M.   +4 more
core   +3 more sources

Toxicological Effects of Polycyclic Aromatic Hydrocarbon Quinones Contaminated in Diesel Exhaust Particles

Asian Journal of Atmospheric Environment, 2007
Accumulated epidemiological and animal studies have suggested that prolonged exposure to ambient particulate matter (PM) is associated with an increased risk of cardiovascular disease and pulmonary dysfunction.
Yoshito Kumagai, Keiko Taguchi
doaj   +1 more source

Gold Nanoparticles-Based Colorimetric Immunoassay of Carcinoembryonic Antigen with Metal–Organic Framework to Load Quinones for Catalytic Oxidation of Cysteine

Sensors
This work reported gold nanoparticles (AuNPs)-based colorimetric immunoassay with the Cu-based metal–organic framework (MOF) to load pyrroloquinoline quinone (PQQ) for the catalytic oxidation of cysteine.
Zhao-Jiang Yu, Ting-Ting Yang, Gang Liu, De-Hua Deng, Lin Liu   +4 more
doaj   +1 more source

Comparison of calculated and experimental isotope edited FTIR difference spectra for purple bacterial photosynthetic reaction centers with different quinones incorporated into the QA binding site.

Frontiers in Plant Science, 2013
Previously we have shown that ONIOM type (QM/MM) calculations can be used to simulate isotope edited FTIR difference spectra for neutral ubiquinone in the QA binding site in Rhodobacter sphaeroides photosynthetic reaction centers.
Nan eZhao, Hari P Lamichanne, Gary eHastings   +2 more
doaj   +1 more source

Reductive activation of potential antitumor bis(aziridinyl)benzoquinones by xanthine oxidase: Competition between oxygen reduction and quinone reduction [PDF]

, 1990
The reduction of a series of 2,5-bis(1-aziridinyl)-1,4-benzoquinone (BABQ) derivatives with various 3,6 substituents by the enzyme xanthine oxidase has been studied.
Janssen, L.H.M., Lusthof, K.J., Mol, N.J. de, Reinhoudt, D.N., Richter, W., Verboom, W.   +5 more
core   +3 more sources

4,7-Dimethoxy-6-propyl-2H-1,3-benzodioxole-5-carbaldehyde

Molbank, 2023
A simple intermediate for the synthesis of methoxy-analogues of coenzymes Q with substituents having various chain lengths based on natural polyalkoxyallylbenzene apiol has been developed.
Dmitry V. Tsyganov, Victor V. Semenov
doaj   +1 more source

Electrodes modified with lipid membranes to study quinone oxidoreductases

, 2009
Quinone oxidoreductases are a class of membrane enzymes that catalyse the oxidation or reduction of membrane-bound quinols/quinones. The conversion of quinone/quinol by these enzymes is difficult to study because of the hydrophobic nature of the enzymes ...
Jeuken, LJC, Weiss, SA
core   +1 more source

Arylmethylamino steroids as antiparasitic agents [PDF]

, 2017
In search of antiparasitic agents, we here identify arylmethylamino steroids as potent compounds and characterize more than 60 derivatives. The lead compound 1o is fast acting and highly active against intraerythrocytic stages of chloroquine-sensitive ...
Becker, Katja, Beckmann, Svenja, Blandin, Stéphanie, Brakhage, Axel, Burrows, Jeremy, Dahse, Hans-Martin, Davioud-Charvet, Elisabeth, Elhabiri, Mourad, Goetz, Alice-Anne, Grevelding, Christoph G., Jortzik, Esther, Krieg, Reimar, Nuryyeva, Selbi, Pinkerton, Anthony B., Quack, Thomas, Rahbari, Mahsa, Rahlfs, Stefan, Schönecker, Bruno, Voigt, Kerstin, Wittlin, Sergio   +19 more
core   +4 more sources

Convenient Synthesis of 2-Thioimidazolone/Menadione Conjugates via a Two-Step Sequence Starting with Direct Amination of Menadione

SynOpen, 2020
A convenient route to conjugates of 2-thiohydantoins and menadione with linkers of various chemical nature through a two-stage reaction sequence (direct amination of the menadione with a functional amine followed by modification of a functional group) is
Dmitry A. Guk, Olga O. Krasnovskaya, Nikolai V. Zyk, Elena K. Beloglazkina   +3 more
doaj   +1 more source