Janet Herdan

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A series of thirty-one chemicals (substituted phenols, hydroquinols, quinones and quinoneimines) were investigated as in vitro inhibitors of DNA-benzo[a]pyrene adducts formation. In order to establish the mechanisms by which such compounds may elicit a protective effect at DNA level, the influence of these compounds upon benzo[a]pyrene (BaP) activation by(More)
The analytical performance of several mercury-coated iridium ultramicroelectrode arrays (IrUMEAs) was studied using square wave anodic stripping voltammetry (SWASV) for determination of cadmium in a pH 4.5 acetate buffer. The microlithographically fabricated IrUMEAs consisted of either 20 or 25 individual disk shaped UMEs, each 10 mm in diameter. The(More)
A new technique (Flash Titration) for the determination of total acidity and total alkalinity was applied to food and beverage analysis. Requiring no liquid titrants, Flash Titration is a technique made possible through microfabrication of electrochemical components on a silicon chip. Acidic or basic titrant was generated electrochemically at a noble-metal(More)
The investigation of the mechanisms of action by which phenolic antioxidants (i.e. BHA, BHT, etc.) protect DNA against interaction with activated BaP, led us to the finding that oxidated aminophenols are much more potent in this respect, being also powerful inhibitors of cytochrome P-450 dependent monooxygenases. However, the quinoneimine structures(More)
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