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Träfflista för sökning "WFRF:(Andersson Marcus) srt2:(1995-1999)"

Sökning: WFRF:(Andersson Marcus) > (1995-1999)

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  • Andersson, Öivind, et al. (författare)
  • Crank Angle Resolved HC Detection Using LIF in the Exhausts of Small Two-Stroke Engines Running at High Engine Speed
  • 1996
  • Ingår i: SAE Transactions, Journal of Engines. - 0096-736X. ; 105:961927
  • Tidskriftsartikel (refereegranskat)abstract
    • In order to separate the HC-emissions from two-stroke engines into short-circuit losses and emissions due to incomplete combustion, Laser Induced Fluorescence (LIF) measurements were performed on the exhaust gases just outside the exhaust ports of two engines of different designs. The difference between the two engines was the design of the transfer channels. One engine had "finger" transfer channels and one had "cup handle" transfer channels. Apart from that they were similar. The engine with "finger" transfer channels was earlier known to give more short-circuiting losses than the other engine, and that behavior was confirmed by these measurements. Generally, the results show that the emission of hydrocarbons has two peaks, one just after exhaust port opening and one late in the scavenging phase. The spectral information shows differences between the two peaks and it can be concluded that the latter peak is due to short-circuiting and the earlier due to incomplete combustion. The flow outside the exhaust port was measured with Laser Doppler Velocimetry (LDV). These measurements confirm the occurrence of two emission peaks.
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  • Elmer, Eskil, et al. (författare)
  • Regulation of neuronal nitric oxide synthase mRNA levels in rat brain by seizure activity
  • 1996
  • Ingår i: NeuroReport. - 1473-558X. ; 7:7, s. 1335-1335
  • Tidskriftsartikel (refereegranskat)abstract
    • The regulation of neuronal nitric oxide synthase (NOS) mRNA levels during kindling epileptogenesis in the rat brain was investigated using in situ hybridization. Following 40 rapidly recurring seizures evoked by hippocampal stimulations, NOS mRNA expression decreased by 56% in the dentate granule cell layer (maximum at 2 h) and increased by 420,105 and 1260% in the CA1 and CA3 pyramidal layers and piriform cortex, respectively (maximum at 12-24 h). Gene expression had returned to control levels after one week. The presumed alterations of nitric oxide production, following the changes in NOS mRNA shown here, may modulate synaptic function during kindling development, and could influence neuronal vulnerability after epileptic insults.
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