and high temperatures (about 700°C or 1300°F). The reactors also resist attack by hydrogen gases which can corrode many metals, especially at high temperature and pressure. The catalyst in commercial ammonia synthesisis usually an iron oxide mixed with a small amount of additional "promoter" material. When the process begins, the hydrogen gas converts the catalyst to pure iron. Gradually, as t
of microbial metabolism
- First, Organisms should be selected, these organisms use stinking material and various chemicals for nutrient, next, odorants enter the filter, so meet layer of organism and water, then odorants are eliminated by dissolution, organism adsorption, and decomposition. Organisms use odorants as nutrient for generation of energy and breeding. In this process, Byproduct is r
and physical properties of high sensitivity to changes intheir chemical environment.
2. The sensing properties of semiconductor metal oxide assures improved selectivity and stability
3. Their peculiar characteristics and size effects make them interesting for metal oxide gas sensors
The reason we take Nox as target gas
1. NOx is harmful to human health in its own right.
2. NOx re
the amount of hydrocarbons or volatile matter hasincreased andthe coal has reached a rank of bituminous (Rightmire, 1984). After the temperature exceeds 210 degrees Fahrenheit carbon dioxide production increases with little production of methane. Thethermogenic production of methane does not exceed the production of carbon dioxide in high volatile high ranks of coal until the temperature is ab
The primary sequences of thousands of olfactory receptors are known from the genomes of more than a dozen organisms: they are seven-helix transmembrane proteins, but there are (asof July 2011) no known structures of any OR. There is a highly conserved sequence in roughly three quarters of all ORs that is a tripodal metal ion binding site, and Suslick has proposed that the ORs are in fact metallo