1998
DOI: 10.1023/a:1022487632133
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Cited by 48 publications
(21 citation statements)
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“…The kinetic measurements conducted with QRM showed that the apparent rate of reaction (2) increases when the pH is lowered, a fact which is in agreement with theoretical predictions for this type of redox process [34]. During the thin-film experiment, the situation is not the same.…”
Section: Resultssupporting
confidence: 82%
See 1 more Smart Citation
“…The kinetic measurements conducted with QRM showed that the apparent rate of reaction (2) increases when the pH is lowered, a fact which is in agreement with theoretical predictions for this type of redox process [34]. During the thin-film experiment, the situation is not the same.…”
Section: Resultssupporting
confidence: 82%
“…They also participate in the process of photosynthesis (hydroquinone plays the mediating role of agents in various reduction processes leading to the release of oxygen). In addition, quinones also display antioxidant properties in many biochemical systems [2][3][4][5][6][7][8]. It is known that, some alkalines, like magnesium and calcium, act as an essential co-factor in a number of biological systems, including the catalysis of oxygen evolution in photosynthesis [9].…”
Section: Introductionmentioning
confidence: 99%
“…At physiological pH, isolapachol (2) is more acidic than lapachol (1), and the biologically inactive methylaminohydroxyquinones 3 and 4 are, to a large extent, zwitterionic. In all four compounds, the first pK a is related to the ionisation of the enol, and the differences in acidity of the -OH group may be explained in terms of the stabilisation of the enolate ion by hydrogen bonding.…”
Section: Discussionmentioning
confidence: 99%
“…Lapachol (1) possesses anti-tumour, antibiotic, antimalarial, anti-inflammatory and anti-ulcer properties, 1 whilst both 1 [2][3][4][5][6] and isolapachol (2) 4,6 exhibit significant activities against the etiological agents of a number of tropical diseases. Additionally, the 2-hydroxy-1,4-naphthoquinones 1 and 2 are potent molluscicides (Table 1) with activities against both mature adults and egg masses of Biomphalaria glabrata, 2,3,7 the intermediate host of the causative agent of schistosomiasis (Schistosoma mansoni).…”
Section: Introductionmentioning
confidence: 99%
“…Quinones show several biological and pharmacological activities, [1][2][3][4][5][6][7][8][9] with their mechanism of action being related to redox cycling, which leads to the formation of reactive oxygen species that can damage cellular macromolecules. 10,11 The quinone cytotoxicity to many human cancer cell lines is amply recognized, [12][13][14][15][16][17] acting through inhibition of DNA repair enzymes, 18 inhibition or activation of DNA topoisomerase I, 17,19 induction of Vol.…”
Section: Introductionmentioning
confidence: 99%