The phrase "a defined time point" is correct and usable in written English.
It can be used in contexts where you need to specify a particular moment in time that has been clearly established or identified.
Example: "The experiment will be evaluated at a defined time point to assess the results."
Alternatives: "a specific time marker" or "a designated time moment".
n is the number of experiments (n = 2), x i is PHB % of cell dry weight (%CDW) at a defined time point.
These models are fitted to our data since our data were a time series with seasonal variation and a defined time point when an event occurred (Ely et al. 1997; Ottenbacher and York 1984).
This provides a defined time point from which the time course of Chn-induced lamellocyte differentiation can be assayed.
10 At a defined time point infection was introduced into the barn.
The severity of arthritis at a defined time point was very variable and precluded daily comparative analysis.
12 This cohort is defined by exposure to the same strain (genotype 1b) at a defined time point.
One strength of our study is that we investigated the patients at a defined time-point during the cold season.
If spores are extracted from dead hosts at a specifically defined time point, as in most experimental evolution protocols e.g. [ 5, 17– 20], then spore numbers should be maximised for this exact time point and the virulence-transmission trade-off should be adjusted accordingly.
The time of surgery defined time point zero in this study.
Such guidelines might include directives of a priori defined time points, or quantiles of survival-time of interest, as well as determining what effect should be regarded as clinically significant at these time points or quantiles.
After the initial imaging session at day 7 after tumor inoculation (t = 0), a group of animals (group A, n = 6) was imaged at defined time points (t = 24, and 72 h) after intravenous (IV) injection of the probe at a dose of 455 mg/kg body weight (b.w).
