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Fourier transform infrared was used to investigate physiological changes in the chemical composition of roots, stems and leaves of Chenopodium ambrosioides L. amended with different manganese concentrations(5, 200, 500, 2000, 5000, 10000 µmol/L) in nutrient solutions. The absorption band heights at 3350 cm-1 and 1642 cm-1 of stem tissues first increased and then decreased, which indicated that the...
anti-slide pile is the most commonly used and the most effective control technologies in Slope engineering. The current design theory is based on experiences not to consider soil arching effect, which made reasonable anti-slide pile spacing, is too small and cost is too high. In the paper, by the analysis of existing research results and the two arch-hinged arch optimal curves and instability arch...
The specific application of power devices has imposed the requirement for intensive investigation of their reliability. In this paper we have investigated the reliability and failure mechanism of power VDMOS. In constant-stress accelerated life test, the three different temperatures (150degC, 165degC and 180degC) are imposed on the devices. Under the bias VDS=7.5V, IDS=0.8A, and the channel temperature...
The present study was to investigate the roles of cyclooxygenase-1 and -2 (COX-1 and COX-2) and prostaglandin (PG) on gastric mucosal integrity of partially sleep deprived (PSD) rats. A slowly moving drum was used to induce PSD. The PG levels in the gastric mucosa of PSD rats, with or without indomethacin or rofecoxib treatment, were determined. Exogenous prostaglandin E (PGE) analog, misoprostol,...
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