Results 51 to 60 of about 217,573 (335)

Origin and evolution of water oxidation before the last common ancestor of the Cyanobacteria [PDF]

, 2015
Photosystem II, the water oxidizing enzyme, altered the course of evolution by filling the atmosphere with oxygen. Here, we reconstruct the origin and evolution of water oxidation at an unprecedented level of detail by studying the phylogeny of all D1 ...
A. William Rutherford, Anisimova, Arato, Arnold, Bader, Beanland, Blankenship, Campbell, Cardona, Cardona, Chu, Chu, Clausen, Cox, Criscuolo, Cser, Dagan, Dau, Debus, Debus, Deusch, Diner, Dismukes, Erickson, Ferreira, Fine, Flannery, Gan, Gan, Giorgi, Gould, Gouy, Guindon, Gupta, Guskov, Hasegawa, Hillier, Hoganson, Hohmann-Marriott, Huson, Ishikita, Ishikita, James W. Murray, Jia, Johnson, Kiss, Klimov, Kopp, Koyama, Kulkarni, Kuroda, Lambreva, Larom, Larsson, Lartillot, Lee, Lidholm, Linke, Loll, Lyons, Marin, Merry, Metz, Michel, Michel, Mimuro, Muh, Mulo, Mulo, Murray, Murray, Nakamura, Nitschke, Nixon, Nixon, Nixon, Ochoa de Alda, Oettmeier, Ogami, Park, Petrouleas, Qian, Rappaport, Rasmussen, Raymond, Rippka, Robinson, Rodriguez-Ezpeleta, Roose, Rutherford, Rutherford, Saito, Sauer, Saw, Sedoud, Service, Shevela, Shi, Shih, Sicora, Sicora, Siegbahn, Sievers, Sugiura, Sugiura, Sugiura, Sugiura, Summerfield, Tanai Cardona, Tichy, Toepel, Turner, Ulas, Umena, Vass, Vassiliev, Vermaas, Vermaas, Vermaas, Vinyard, Waldbauer, Wegener, Yoon, Zehr, Zhang, Zhang, Zimmermann   +126 more
core   +1 more source

Characterization and Trypanocidal Activity of a Novel Pyranaphthoquinone

Molecules, 2017
Chagas disease is an endemic parasitic infection that occurs in 21 Latin American countries. New therapies for this disease are urgently needed, as the only two drugs available (nifurtimox and benznidazol) have high toxicity and variable efficacy in the ...
Elen Diana Dantas, Fabia Julliana Jorge de Souza, William Nascimento Litaiff Nogueira, Cláudia Cândida Silva, Pedro Henrique Antunes de Azevedo, Cícero Flávio Soares Aragão, Patricia Danielle Oliveira de Almeida, Mariana Filomena do Carmo Cardoso, Fernando de Carvalho da Silva, Eduardo Pereira de Azevedo, Euzébio Guimarães Barbosa, Emerson Silva Lima, Vitor Francisco Ferreira, Ádley Antonini Neves de Lima   +13 more
doaj   +1 more source

Studies on 1,4-Quinone Derivatives Exhibiting Anti-Leukemic Activity along with Anti-Colorectal and Anti-Breast Cancer Effects

Molecules, 2022
Colorectal cancer (CRC), breast cancer, and chronic myeloid leukemia (CML) are life-threatening malignancies worldwide. Although potent therapeutic and screening strategies have been developed so far, these cancer types are still major public health ...
Halilibrahim Ciftci, Belgin Sever, Nusret Kaya, Nilüfer Bayrak, Mahmut Yıldız, Hatice Yıldırım, Hiroshi Tateishi, Masami Otsuka, Mikako Fujita, Amaç Fatih TuYuN   +9 more
doaj   +1 more source

Alkaline Quinone Flow Battery with Long Lifetime at pH 12

Joule, 2018
Summary We demonstrate a long-lifetime, aqueous redox-flow battery that can operate at a pH as low as 12 while maintaining an open-circuit voltage of over 1 V. We functionalized 2,6-dihydroxyanthraquinone (2,6-DHAQ) with highly alkali-soluble carboxylate
David G. Kwabi, Kaixiang Lin, Yunlong Ji, Emily F. Kerr, M. Goulet, Diana Porcellinis, Daniel P. Tabor, Daniel A. Pollack, Alán Aspuru-Guzik, R. Gordon, M. Aziz   +10 more
semanticscholar   +1 more source

Integrating Patient‐Reported Quality Measures in SLE: Development of the American College of Rheumatology Implementation Guide

Arthritis Care &Research, Accepted Article.
Objective To support high‐quality, patient‐centered care for systemic lupus erythematosus (SLE), the American College of Rheumatology (ACR) developed evidence‐based measures incorporating clinical and patient‐reported outcomes measures (PROMs). Using the Consolidated Framework for Implementation Research (CFIR), we conducted semi‐structured interviews ...
Catherine Nasrallah, Cherish Wilson, Christine Hariz, Christie M Bartels, Shanthini Kasturi, Wambui Machua, Amy Bennett, Kate Chiseri, Allison Plitman, Starla Hairston Blanks, April Jorge, Patti Katz, Jinoos Yazdany, Shivani Garg   +13 more
wiley   +1 more source

Observation of a bacteriochlorophyll anion radical during the primary charge separation in a reaction center [PDF]

, 1989
The primary light-induced charge separation in reaction centers of Rhodobacter sphaeroides was investigated with femtosecond time resolution. The absorption changes in the time range 100 fs to 1 ns observed after direct excitation of the primary donor P ...
Finkele, Ulrich, Holzapfel, Wolfgang, Kaiser, Wolfgang, Oesterhelt, Dieter, Scheer, Hugo, Stilz, Hans Ulrich, Zinth, Wolfgang   +6 more
core   +2 more sources

The Old Yellow Enzyme OfrA Fosters Staphylococcus aureus Survival via Affecting Thiol-Dependent Redox Homeostasis

Frontiers in Microbiology, 2022
Old yellow enzymes (OYEs) are widely found in the bacterial, fungal, and plant kingdoms but absent in humans and have been used as biocatalysts for decades.
Eslam S. Ibrahim, Eslam S. Ibrahim, Knut Ohlsen   +2 more
doaj   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Total synthesis of aurofusarin: studies on the atropisomeric stability of bis-naphthoquinones [PDF]

, 2018
An efficient annulation involving pyrone addition to a quinone and Dieckmann condensation was developed for rapid assembly of a γ-naphthopyrone monomeric precursor to the bis-naphthoquinone natural product aurofusarin.
Allen, Ashley, Bao, Berkessel, Birchall, Bringmann, Bringmann, Chen, Corey, Crimmins, Dao, Donner, Dwyer, Flegel, Frandsen, Gao, Gray, Helder, Jew, Konkol, Lee, Leeper, Liau, Masson, Morishita, Natori, Romaine, Shi, Shibata, Shibata, Shibata, Shirakawa, Shirakawa, Sperry, Sun, Takeya, Takizawa, Varun, Wu, Yeung, Zeeck, Zhang, Ōki   +42 more
core   +1 more source

Highly Sensitive Electrochemical Biosensor Based on Hairy Particles with Controllable High Enzyme Loading and Activity

Advanced Functional Materials, EarlyView.
For the first time, a highly sensitive electrochemical biosensor based on SiO2‐based hairy particles with a grafted PDMAEMA polymer brush containing a quantifiable and large amount of immobilized Laccase is reported. The fabricated biosensor exhibits a sensitivity of 0.14 A·m⁻¹, a limit of detection (LOD) of 0.1 µm, and a detection range of 0.3–750 µm,
Pavel Milkin, Anila Antony, Hongtao Cai, Antonia Debevc, Ceyda Topal, Anne Linhardt, Alla Synytska, Leonid Ionov   +7 more
wiley   +1 more source