Research ArticleOpen accessIn the abstractAnalysis Heat Flow Between Seat and Valve of ICEM.H. Shojaefard, A.R. Noorpoor, M. Ghaffarpour, F. MohammadiAn interesting application of system identification method is to investigate the heat transfer from the exhaust valve, especially the valve burning at high temperatures. This study consists of experimental and analytical works. For the experiment, two co-axial rods were used to transfer heat constantly at their contact surfaces. Using the measured temperatures at different locations of the rods and the … …American Journal of Applied Sciences, Vol. 4, Issue 9 · 30 Sep 2007 · 7,208 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptimum Conditions for Measuring Dehydrogenase Activity of Aspergillus niger using TTCA. E. Ghaly, N. S. MahmoudThe suitability of the triphenyl tetrazolium chloride (TTC) for dehydrogenase activity measurement of the vegetative cells of the fungal species Aspergillus niger was investigated. The triphenyl formazan (TF) yield increased with the increases in TTC concentration, pH, temperature and incubation time within the studied ranges. The effects of individual parameters, as well as the combined effects, on the TF yield … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 4 · 31 Dec 2006 · 9,008 accessesView PDFCite