Changeover rapid

In a rapid changeover to make another product the meter was not recalibrated for the new monomer, monomer B. This led to a large overcharge of monomer B and the subsequent runaway reaction. 

Clearly, however, the flow simplification would be invalid on a small site with episodic projects, or in contexts with significant downtime due to changeover and setup activities for project-specific assays. Such simulation problems covering multiple projects and multiple assays, with use of a mix of shared and dedicated resources, can rapidly become intractable, and an early, com-monsense selection of the focus area for simulation is essential. 

Reverse phase chromatography is finding increasing use in modern LC. For example, steroids (42) and fat soluble vitamins (43) are appropriately separated by this mode. Reverse phase with a chemically bonded stationary phase is popular because mobile phase conditions can be quickly found which produce reasonable retention. (In reverse phase LC the mobile phase is typically a water-organic solvent mixture.) Rapid solvent changeover also allows easy operation in gradient elution. Many examples of reverse phase separations can be found in the literature of the various instrument companies. 

The electrical conductivity of CoOP as a function of temperature is shown in Figure 6. Above room temperature the compound exhibits metallic behaviour but coincidental with the development of the superstructure the conductivity falls rapidly with decreasing temperature. Below 250 K CoOp behaves as a semiconductor with an activation energy of meV.74 The conduction has been shown to be frequency dependent below 250 K.75 Thermopower studies have also clearly demonstrated the changeover from metallic behaviour above 300 K. to semiconductor behaviour below 250 K.72 The behaviour of ZnOP is very similar to that of CoOp, with the phase transition from the Cccm to Pccn space group occurring at 278 K. Superstructure formation is complete by about 260 K.77... 

Rotary load cells are located in a semicircular pattern. Containers are transported by physical placement onto load cells. Future addition of load cells is limited however, the unit has rapid changeover, small size, and rapid response to taring of the vials. 

Thus, a changeover to the more rapid OH branching reaction may take place at H2 - 13% and give rise to a more rapid increase in the flame speed. The chemical length scale is also significantly reduced when the kinetic mechanism changes to rapid OH branching. 

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