The phrase "is the decisive step" is correct and usable in written English.
You can use it when you want to express that something is the key decision or action required to reach a desired outcome. For example: "Filing the paperwork is the decisive step in starting a new business."
Drainage of the liquid film of the matrix between the colliding droplets is the decisive step in coalescence.
It is the decisive step for determining properties such as particle size, shape, and purity, which in turn determine the quality of the end product.
Before secretion, tyrosinase has to pass a post ER check point in the Golgi which is the decisive step towards secretion versus recycling back into the ER [50].
That is, the decisive step in the evolution of neural systems for action and cognition may be the decoupling of action execution from the preparatory aspects, using exactly the same brain systems to address abstract problems.
Caspase-8 is crucial for triggering apoptosis by death receptors since its recruitment to and activation at the DISC is the decisive step for the initiation of the caspase cascade [ 24].
According to Camus, the execution of King Louis XVI during the French Revolution was the decisive step demonstrating the pursuit of justice without regard to limits.
These results indicated that the growth rate of the spherulites was the decisive step for the overall crystallization rate in this case, which can be explained on the basis of dilution effect and obstruction effect on the mobility of PP chains in the propylene octene copolymer.
This was the decisive step in human history to make compasses more useful for navigation, and may have been a concept unknown in Europe for another four hundred years (evidence of German sundials made circa 1450 show markings similar to Chinese geomancer compasses in regard to declination).
The process of re-loading of G-actin with ATP and incorporation of actin monomers at linear-barbed or branched-ends of polymeric filaments could be the decisive step that takes advantage of local ATP generated by CK-B.
However, in the absence of studies it must be acknowledged that it is unknown which part of unbearably suffering patients die as a consequence of EPAS, nor is it clear which are the decisive steps from unbearable suffering to EPAS.
Rough approximations indicate the advantages of thermal-swing or displacing-agent desorption and demonstrate that the desorption step is the decisive phase in modelling adsorber performance.
