Results 11 to 20 of about 66,627 (253)

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

open access: yesFrontiers 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   +2 more
doaj   +1 more source

A BODIPY-Bridged Bisphenoxyl Diradicaloid: Solvent-Dependent Diradical Character and Physical Properties

open access: yesMolecules, 2019
We report a new boron dipyrromethene (BODIPY)-bridged bisphenoxyl diradicaloid (2), which showed closed-shell diamagnetic character in less polar solvents such as dichloromethane but open-shell diradical character with paramagnetic activity in the very ...
Fang Miao, Hoa Phan, Jishan Wu
doaj   +1 more source

Detection and Characterization of Catechol Quinone-Derived Protein Adducts Using Biomolecular Mass Spectrometry

open access: yesFrontiers in Chemistry, 2019
The catechol quinone (CQ) motif is present in many biologically relevant molecules throughout endogenous metabolic products, foods, drugs, and environmental pollutants. The CQ derivatives may undergo Michael addition, and has been shown to yield covalent
Shu-Hui Chen, Chun-Wei Li
doaj   +1 more source

Utilizing Frémy's Salt to Increase the Mechanical Rigidity of Supramolecular Peptide-Based Gel Networks

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
Peptide-based supramolecular gels are an important class of biomaterials that can be used for biomedical applications ranging from drug delivery to tissue engineering.
Galit Fichman, Joel P. Schneider
doaj   +1 more source

Synthesis and Antimalarial Activities of New Hybrid Atokel Molecules

open access: yesChemistryOpen, 2022
The currently spreading resistance of the malaria parasite Plasmodium falciparum to artemisinin‐based combination therapies makes an urgent need for new efficient drugs.
Youzhi Li   +8 more
doaj   +1 more source

Synthesis of isopropyl-substituted anthraquinones via Friedel–Crafts acylations: migration of isopropyl groups [PDF]

open access: yesRoyal Society Open Science, 2017
Friedel–Crafts reactions of isopropyl-substituted benzenes with phthalic anhydride in the presence of aluminium trichloride, followed by cyclization of the products with strong sulfuric acid give, as expected, anthraquinones.
Abdel B. Chakiri, Philip Hodge
doaj   +1 more source

The Synthesis of Diquinone and Dihydroquinone Derivatives of Calix[4]arene and Electrochemical Characterization on Au(111) surface.

open access: yesActa Chimica Slovenica, 2016
Several new electroactive diquinone and dihydroquinone derivatives of calix[4]arene bearing anchor functional groups were designed, synthesized and characterized. A method for selective protection of the hydroquinone –OH groups with trimethylsilyl groups
Bostjan Genorio
doaj   +1 more source

Chemical, Bioactivity, and Biosynthetic Screening of Epiphytic Fungus Zasmidium pseudotsugae

open access: yesMolecules, 2020
We report the first secondary metabolite, 8,8′-bijuglone, obtained from pure cultures of the slow growing Douglas fir- (Pseudotsuga menziesii var. menziesii) foliage-associated fungus Zasmidium pseudotsugae.
Gisela A. González-Montiel   +5 more
doaj   +1 more source

Environmentally Friendly Expeditious One-Pot Electrochemical Synthesis of Bis-Catechol-Thioether Metabolites of Ecstasy: in vitro Neurotoxic Effects in the Rat Hippocampus

open access: yesInternational Journal of Electrochemical Science, 2008
A straightforward one-pot electrochemical synthesis of bis-catechol-thioether metabolites of MDMA (ecstasy), 2,5-bis(glutathion-S-yl)-N-methyl-α-methyldopamine and 2,5-bis(N-acetylcystein-S-yl)-N-methyl-α-methyldopamine, in acceptable yields and high ...
Anne Felim   +3 more
doaj   +1 more source

High-Throughput Virtual Screening of Quinones for Aqueous Redox Flow Batteries: Status and Perspectives

open access: yesBatteries, 2022
Quinones are one of the most promising and widely investigated classes of redox active materials for organic aqueous redox flow batteries. However, quinone-based flow batteries still lack the necessary performance in terms of metrics, such as specific ...
Abhishek Khetan
doaj   +1 more source

Home - About - Disclaimer - Privacy