The phrase "absence of variation" is correct and usable in written English.
It can be used in contexts discussing consistency, uniformity, or lack of change in a particular subject or situation.
Example: "The experiment showed an absence of variation in the results, indicating a stable outcome."
Alternatives: "lack of diversity" or "no variation present".
The absence of variation between the two different light conditions suggests a deficit in the regulatory mechanisms of the two oscillators that govern the compression and decompression of the activity with changing environmental light conditions3,24.
The San Nicolas Island population has a near absence of variation, demonstrating a unique genetic flatlining that is punctuated by heterozygosity hotspots, enriched for olfactory receptor genes and other genes with high levels of ancestral variation.
This absence of variation may be attributable to posttranscriptional regulation for these genes or related to the time of sampling of the mammary tissue relative to the previous meal and milking.
A similar absence of variation accompanied most hydrocarbon biomarker ratios used for facies and maturity assessment.
This condition assures the absence of variation of the species composition in the feed/retentate side.
In the absence of variation in tax rates through time and across companies, we can only presume a similar debt policy for each company, which is not the case, or we may end up with contradictory results.
The cycle has various important features such as the ability to synchronise with an external periodic light source and to continue to oscillate even in the absence of variations in illumination.
The validity of the method was assessed by proving the absence of variations in carrier distribution in the third dimension, as expected for NWs etched into a blanket stack.
These complex W E relationships arise in the absence of variations in climate and lithology, which suggests that transients may account for some of the observed differences in W E relationships among field sites, even among sites that share the same climate and lithology.
In sensitivity analysis, the effect of variations in one network parameter on model output is evaluated in the absence of variations in all other network parameters.
Therefore, the presence of similar Glut4 levels in the cell membrane of tissues obtained from the four groups of rats explains the absence of variations in the levels of circulating glucose and insulin.
