Two models of protein folding are currently being confirmed: 1  The diffusion collision model, in which first a nucleus forms, then the secondary structure, and finally these secondary structures collide and pack tightly together. 2  The nucleation-condensation model, in which the secondary and tertiary structures of the protein are made at the same time.
Air Currents: If there are fans, wind , or other sources of air movement, gases may tend to rise or collect in certain areas of a facility. The local air currents should be assessed to aid in selecting the sensor location. Air convection can often be more important in determining gas concentration areas than factors of vapor density. Gas Emission Sources: As a rule, at least one sensor shouold be located in close proximity to each point where an emission is likely to occur.
It has the most potential leak sources and the most ammonia available to build up to disastrous concentrations. Using a minimum of two 0-250 ppm sensors for complete coverage and redundancy is necessary. Use two 0-250 ppm ammonia gas sensors in Engine Rooms 4,000 square feet or less.Install an additional sensor for each additional 2000 square feet.Locate sensors in the breathing zone â 5 feet off the floor.sing a minimum of two 0-250 ppm sensors for complete coverage and redundancy is necessary. Use two 0-250 ppm ammonia gas sensors in Engine Rooms 4,000 square feet or less. Install an additional sensor for each additional 2000 square feet. Locate sensors in the breathing zone â 5 feet off the floor.