Results 41 to 50 of about 157,296 (336)

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

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

Metformin promotes mitochondrial integrity through AMPK‐signaling in Leber's hereditary optic neuropathy

FEBS Open Bio, EarlyView.
Metformin mediates mitochondrial quality control in Leber's hereditary optic neuropathy (LHON) fibroblasts carrying mtDNA mutations. At therapeutic levels, metformin activates AMPK signaling to restore mitochondrial dynamics by promoting fusion and restraining fission, while preserving mitochondrial mass, enhancing autophagy/mitophagy and biogenesis ...
Chatnapa Panusatid, Rapasviranda Soiyangsuk, Maneeluck Tanadjindarat, Chayanon Peerapittayamongkol   +3 more
wiley   +1 more source

Cytotoxic Compounds from Aloe megalacantha

Molecules, 2017
Phytochemical investigation of the ethyl acetate extract of the roots of Aloe megalacantha led to the isolation of four new natural products—1,8-dimethoxynepodinol (1), aloesaponarin III (2), 10-O-methylchrysalodin (3) and methyl-26-O-feruloyl ...
Negera Abdissa, Sebastian Gohlke, Marcel Frese, Norbert Sewald   +3 more
doaj   +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

Engineering Porous Hollow Metal‐Poly(Heptazine Imide) Spheres: An Optimized Synthetic Strategy for Controlling Surface, Morphology, and Properties

Advanced Functional Materials, EarlyView.
Hollow poly(heptazine imide) spheres are prepared through a novel approach that integrates hard templating with ionothermal synthesis. This method enables precise control over surface area, pore volume, hydrophilicity, light absorption, band position, and metal composition. These tunable properties facilitate the customized design of semiconductors for
Lingli Ni, Erik Troschke, Henrik Vorwerk, Shiva Shahbazi Avarvand, Andreas Stihl, Nadzeya Brezhneva, Marius Hermesdorf, Desirée Leistenschneider, Felix H. Schacher, Jacob Schneidewind, Martin Oschatz   +10 more
wiley   +1 more source

Semiquantitative Infrared Analysis of Diketones and Anhydrides in a Reaction Mixture [PDF]

, 1976
The ozonolysis of a hydroxymethylene ketone yields a mixture of diketone and anhydride. Treatment of hydroxymethylene camphor with ozone affords, in addition to the expected camphor quinone, a surprisingly large amount of camphoric anhydride (56%) via ...
Getty, R., Lay, J. O., Watson, F. H., Jr., Yang, Dominic T.C.   +3 more
core   +2 more sources

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

Mineral Phosphate Solubilization in Burkholderia tropica Involves an Inducible PQQ-Glucose Dehydrogenase [PDF]

, 2016
Aims: The objective of this work was to provide knowledgement about the mechanism and regulation of the mineral phosphate solubilization in Burkholderia. tropica. To this end, the expression of the direct extracellular oxidative pathway in B. tropica was
Bernabeu, Pamela Romina, Boiardi, Jose Luis, Galar, Maria Lina, Garcia Ferreyra, Gimena, Garcia, Sabrina Soledad, Guidi, Verónica Inés, Luna, Maria Flavia   +6 more
core   +2 more sources

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