Once the novel hybrid nanomaterial was characterized by spectroscopic and electrochemical techniques, confirming the presence of the characteristic quinone/hydroquinone moieties, it has been combined with lactate oxidase (LOx) to develop a sensitive and selective reagentless lactate biosensor. The resulting ...
In addition to the O-containing groups such as quinone/hydroquinone moieties, the condensed aromatic (sub-) structures of biochar may be electroactive by allowing electrons to be transferred across the conjugated π-electron systems (Klüpfel et al., 2014; Sun et al., 2017). Our previous ...
The first stage involves the reduction of the bioreductive moiety. Typically, this is achieved by cellular enzymes, e.g., cytochrome P450reductase. Quinone can undergo bioreduction in two one-electron steps, which produces a semiquinone radical anion in the first seduction, and a hydroquinone in ...
functional groups, respectively, of the compound and the monoclonal antibody; and wherein the cleavable linker is selected from a group consisting of glutarate, N-hydroxysuccinic amide ester, a peptide, monosaccharide, oligosaccharide, thioether, disulfide, trisulfide, hydrazide and hydrazone moieties. ...
Benzoquinone (Fig.1a) is the basic subunit of quinone compounds [21]. Chemically, 1,4-benzoquinone (also called para-benzoquinone) is a non-aromatic compound which is easily converted into hydroquinone on reduction [22]. Benzoquinone units serve as building blocks in quinone synthesis and provide...
Introduction Sponges are a prolific source of bioactive compounds [1–7]; in particular, the genera Dysidea, Spongia, and Dactylospongia (family Spongidae) represent a rich source of bioactive sesquiterpenoid quinones and hydroquinones [8]. Merosesquiterpenes contain a sesquiterpene unit joined to ...
hydroquinone; lignin; quinone; redox electrolytes; supercapacitor electrodes1. Introduction Our industrial development and the rising human population are necessitating a hunt for environmentally friendly and long-term energy sources [1,2]. Although it is possible to harvest energy from the wind, sun,...
In cells that express NQO1, the 1,2-naphthoquinone β-lap(Q) is reduced to the hydroquinone form (β-lap(HQ)) using one molecule of NADH per reaction. The hydroquinone form of β-lap is presumably unstable and spontaneously autoxidizes to its original parent form, probably through a ...
A polysiloxane and an acrylonitrile–ethylene copolymer with covalently attached p‐hydroquinone/benzoquinone moieties were prepared and tested as electron transfer relay systems in amperometric glucose biosensors. Using experiments involving cyclic voltammetry and stationary potential measurements, it was shown ...
AQDS can be reduced to semiquinone, LQ can be converted to hydroquinone, while NQ could be produced to hydroquinone and trace amounts of semiquinone in the presence of G. sulfurreducens. Results obtained show that addition of quinone compounds can enhance the ferrous production, and subsequently ...