The phrase "a certain phase in" is correct and usable in written English.
It can be used to refer to a specific stage or period within a larger process or context.
Example: "During a certain phase in the project, we encountered unexpected challenges that required us to rethink our strategy."
Alternatives: "a specific stage in" or "a particular period in".
During a certain phase in my life film was a substitute for religion".
It was also he who worked with the plaza on Wall Street -- not least in dealing with Jean Dubuffet and his big sculpture, "Group of Four Trees," which is for many people the signature of a certain phase in the life of New York.
Most of these challenges can be assigned to a certain phase in the development, while some of them appear in the entire life-cycle of a PSS.
At a certain phase in their lives, one chose to put family first and one chose to put work first.
At a certain phase in vasculature morphogenesis, the three cell types co-localized as triplets and acted in concert.
For example, think about how a person is reacting such a way because he or she is going through a certain phase in their life.
The stathmokinetic approach employed relies on the principle that if cell cycle progression is blocked in a certain phase, the proportion of cells in that phase will increase, whereas the proportions in other phases decrease, and that the rate of change of these proportions are a function of culture cycle time.
However, this accumulation only occurs within a certain phase of cellular development – in this case, during the young fruit stage, when the capacity is high for synthesis and low for recycling.
Since most mutations are deleterious, long extensions of genes are expected to be under stronger purifying selection than short ones [ 13] and the frequency of initiation and termination codons in a certain phase is an upper-limit constraint to the possible number of overlapping genes in that phase.
Thus, one drug may be used to stop the growth of cancer cells in a certain phase, while another agent may work at a different phase.
Instead, weather conditions become subject to the whims of the North Atlantic Oscillation, a measure of the relationship between pressure systems over the Atlantic Ocean, which can change every couple of weeks or get stuck in a certain phase.
