Results 11 to 20 of about 122,899 (336)

Electrochemical properties of quinones, antraquinones and their derivatives – potential redox-systems for flow batteries [PDF]

open access: yesЭлектрохимическая энергетика, 2021
Practical interest in redox flow batteries has arisen in recent decades as a result of intensive development in the field of alternative energy (such as solar and wind) and the control of peak loads in industrial electrical networks.
Kazarinov, Ivan Alekseevich   +6 more
doaj   +1 more source

Synthetic Strategies to Terpene Quinones/Hydroquinones

open access: yesMarine Drugs, 2012
The cytotoxic and antiproliferative properties of many natural sesquiterpene-quinones and -hydroquinones from sponges offer promising opportunities for the development of new drugs.
Marina Gordaliza
doaj   +1 more source

1,4- Addition of diazomethane to a heterodiene: a direct preparation of the oxazolic ring

open access: yesAnais da Academia Brasileira de Ciências, 2007
The reaction of naphthoquinone-oximes (3) and (4) with diazomethane yields directly, in one step, the oxazoles (5) and (6), respectively.A reação das naphthoquinona-oximas (3) e (4) com diazometano fornece diretamente, em uma etapa, os oxazóis (5) e (6),
Flávio da S. Emery   +9 more
doaj   +1 more source

A Computational Protocol Combining DFT and Cheminformatics for Prediction of pH-Dependent Redox Potentials

open access: yesMolecules, 2021
Discovering new materials for energy storage requires reliable and efficient protocols for predicting key properties of unknown compounds. In the context of the search for new organic electrolytes for redox flow batteries, we present and validate a ...
Rocco Peter Fornari, Piotr de Silva
doaj   +1 more source

Development of a hybrid flow battery layout based on the derivatives of quinones and anthraquinones in alkaline solutions [PDF]

open access: yesЭлектрохимическая энергетика, 2023
Practical interest in redox flow batteries (RFB) has arisen in recent decades due to the intensive development of alternative energy (such as solar and wind) and the regulation of peak loads in industrial electrical networks.
Kazarinov, Ivan Alekseevich   +5 more
doaj   +1 more source

Why 1,2‑quinone derivatives are more stable than their 2,3‑analogues? [PDF]

open access: yes, 2015
In this work, we have studied the relative stability of 1,2- and 2,3-quinones. While 1,2-quinones have a closed-shell singlet ground state, the ground state for the studied 2,3-isomers is open-shell singlet, except for 2,3-naphthaquinone that has a ...
Dominikowska, Justyna   +6 more
core   +1 more source

Mini Review of Phytochemicals and Plant Taxa with Activity as Microbial Biofilm and Quorum Sensing Inhibitors

open access: yesMolecules, 2015
Microbial biofilms readily form on many surfaces in nature including plant surfaces. In order to coordinate the formation of these biofilms, microorganisms use a cell-to-cell communication system called quorum sensing (QS).
Chieu Anh Kim Ta, John Thor Arnason
doaj   +1 more source

The MarR-Type Repressor MhqR Confers Quinone and Antimicrobial Resistance in Staphylococcus aureus [PDF]

open access: yes, 2019
Aims: Quinone compounds are electron carriers and have antimicrobial and toxic properties due to their mode of actions as electrophiles and oxidants.
Fritsch, Verena Nadin   +9 more
core   +1 more source

Metal-Free Aminohalogenation of Quinones With Alkylamines and NXS at Room Temperature

open access: yesFrontiers in Chemistry, 2022
A simple and practical strategy for intermolecular aminohalogenation of quinone with alkyl amines and NXS was developed, in which haloamines generated in situ were employed as bifunctional reagents.
Jia Li, Yu-An Li, Ge Wu, Xu Zhang
doaj   +1 more source

Efficient photochemical activity and strong dichroism of single crystals of reaction centers from Rhodopseudomonas viridis [PDF]

open access: yes, 1983
Crystallized reaction centers from Rhodopseudomonas viridis (i) are photochemically active with electron transfer from the special pair to the quinones, (ii) show dichroism giving valuable information on the orientation of the different chromophores and (
Clayton   +15 more
core   +1 more source

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