The phrase "variations occurred" is correct and usable in written English.
It is often used to refer to a change or shift in something that has already happened. For example: "As time passed the climate continued to change and variations occurred in the weather patterns."
Fig. 4 Huge variations occurred at the domestication-related genes of the 60 rice landraces.
Although some annual variations occurred, mean crop yield and grain protein were similar among tillage treatments.
During 2011, major variations occurred in level that were related to east rift zone activity.
From March 2nd to March 19th, a RH drop that cannot be explained by temperature variations occurred.
Contrary to control quail, significant daily variations occurred in both the humoral and cellular immune responses of birds given melatonin.
Race conditions, during mismatch variations, occurred for the flip-flop that is constructed from NAND and inverter based multiplexers.
Yet, some variations occurred between the individual interviews, mostly due to different levels of expertise or the familiarity with the actual co-creation activities within Kampusareena.
The present study provides the first outline of SNP variations occurred in rice pre-miRNAs at the whole genome-wide level.
Although the five scenarios were in general agreement with respect to the overall tendencies in potential future suitable habitat, significant variations occurred in the amount of potential movement in many of the species.
Variations occurred in applied size and shape of the ROI, use of T1/T2 MR images for guidance of ROI placement on ADC map, and averaging of multiple ROIs.
Timing variations occurred in acquiring 2 and 4 h PET scans with largest variation in a patient from the enema group whose 2 h PET scan was delayed by 45 min and 4 h scan delayed by 59 min.
