D L Lei

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Nitric oxide (NO), a diffusible gas, is a messenger molecule that mediates vascular dilatation and neural transmission. The enzyme nitric oxide synthase (NOS) present in neurons is activated by Ca2+ influx associated with activation of glutamate receptors. Cultured cortical neurons containing NOS are selectively vulnerable to injury by kainic acid (KA).(More)
Cerebral ischemia/hypoxia induces histopathological changes characterized by nuclear and cytoplasmic condensation and sustained c-fos expression. The ischemic changes are thought to be initiated by excessive glutamate released by the ischemic neurons. However, no comparative study has been made between the pathological and molecular changes caused by local(More)
The rapid pace of innovations in information and communication technology (ICT) industry over the past decade has greatly improved peo-ple's mobile communication experience. This, in turn, has escalated exponential growth in the number of connected mobile devices and data traffic volume in wireless networks. Researchers and network service providers have(More)
The beta-NADPH histochemical method was used to study the effect of lead on activity of nitric oxide synthase(NOS) in neurons and vessel smooth muscles of intestinal wall in rats. The results showed that the number of NOS positive neurons and fibers was decreased and degenerative changes of some NOS positive neurons were found after the lead acetate(More)
While 4 micrograms of Fragment A-B of tetanus toxin (which lacks the binding site for nervous tissue) causes flaccid paralysis and death in mice, 26 micrograms has no toxic effect in goldfish. Antibodies to either A-B or to fragment C (which contains the binding site) block the paralytic effect of whole toxin in goldfish. It is concluded that binding is(More)
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