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Electron attachment to isolated molecules as a probe to understand mitochondrial reductive processes
No full textThis chapter describes the complementary experimental techniques Electron Transmission Spectroscopy
and Dissociative Electron Attachment Spectroscopy, two of the most suitable means for investigating
interactions between electrons and gas-phase molecules, resonance formation of temporary molecular
negative ions, and their possible decay through the dissociative electron attachment (DEA) mechanism.
The latter can be seen as the gas-phase counterpart of the transfer of a solvated electron in solution,
accompanied by dissociation of the molecular anion, referred to as dissociative electron transfer (DET).
DET takes place in vivo under reductive conditions, for instance, in the intermembrane space of mitochondria
under interaction of xenobiotic molecules possessing high electron affinity with electrons “leaked” from the mitochondrial respiratory chain. A likely mechanism of the toxic activity of dichlorodiphenyltrichloroethane based on its DEA properties is briefly outlined, and compared with the well-established harmful effects of the model toxicant carbon tetrachloride ascribed to reductive dechlorination in a cellular ambient. A possible mechanism of the antioxidant activity of polyphenolic compounds present near the main site of superoxide anion production in mitochondria is also briefly discussed
Method for programming multi-level non-volatile memories by controlling the gate voltage
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Dynamics of Fast-Erasing Bits in Flash Memories
No full textThe paper analyzes the dynamics of fast-erasing bits in flash memories under different erasing conditions and their correlation with the tail observed in the cumulative distribution of erased thresholds
Bipolar Flash Memory (BipFlash) - A new Architecture for a Non-Volatile Memory with a High Programming Efficiency
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