The phrase "assay period" is correct and usable in written English.
It is typically used in scientific or research contexts to refer to the duration during which an assay or test is conducted.
Example: "The assay period for the clinical trial was set to six months to ensure accurate results."
Alternatives: "testing duration" or "evaluation timeframe".
We observed robust circadian rhythms of bioluminescence which dampened progressively during the assay period (5−9 dpf) (P < 0.000001 for periodic oscillation with free running period tau = 25.1; one-way ANOVA P < 0.001 for the time effect).
Relative to the -ve (DEPC water) and +ve (dsGFP) control diets, which exhibited only a small decrease in survival over an assay period of 7 days, the dsMpNav containing diet resulted in a significant (p < 0.005) impact on aphid mortality between days 3 and 7.
Using an in vitro degradation assay, we observed that EDCn microthreads degraded within 24 h, six times slower than uncrosslinked control threads, but EDCa microthreads did not show any significant indication of degradation within the 7-day assay period.
Both assay types have similar characteristics for the determination of estrogen in sewage and urine samples e.g. 6 25 h assay period with detection and determination limits and EC50 values for 17β-estradiol of 2.8 ng L− 1, 5.9 ng L− 1, 33.2 ng L− 1 (nAES-P) and 3.1 ng L− 1, 6.7 ng L− 1 and 39.4 ng L− 1 (nAES-T).
This means that percent mortality of Capitella sp. C increased with increase in the concentrations of the detergents tested over the assay period.
These two culture regimes were continued in both series of plates for the rest of the 25-day assay period, with the medium replenished every 3 4 days.
During the assay period, the number of viable bacterial colonies showed a time course dependent decreasing trend in the fish treated with plant extract.
Subsequently, χ ac for the mixture of the reagent and the CEA solution was measured continuously during the entire assay period by using an analyzer (χacPro-E101, MagQu Corp., Taiwan).
For a Φ CEA of 10 ppm, the formation of magnetic clusters in the assay of the CEAs was verified by measuring χ ac along with the hysteresis loop during the assay period.
This control demonstrated that the eggs remained viable throughout the course of the assay period.
In addition, it confirmed the sterility of the media employed throughout the assay period.
