Sentence examples for background level was used from inspiring English sources

The non-occupational background level was used as the minimum requirement for assigning occupational exposure (Kauppinen et al, 2000).

Further, questions that were previously not validated about smoking habits, migration background, and educational level were used to group participants as smoker and non-smoker and Swiss citizens with and without a migration background and in three categories of educational levels (lower secondary school, upper secondary school, and high school).

Non-tumorigenic HEK 293 cells with low background of API5 expression level were used as a positive control for comparison.

Due to the effect that student body composition might have on such an association, important student background variables aggregated at the class/school level were used to control for their effect at this level of analysis.

Performing the analyses of methylated histones, a specific enrichment of the DNA above background level was only detected using the antibodies for di- and tri-methylated H3K4 in the basal cells.

Total protein levels were used as a background control to ensure that changes were due to increases in phosphorylation status rather than to increases in the respective kinases.

No significant difference in background level was observed.

When the OsASNase2 sense probe was used, only weak signals as background level were observed (Fig. 3d).

Average den-sities of the bands above background levels were measured using a BioRad GS-800 Calibrated Densitometer using Quantity One 4.6.4 software.

For both LacZ and luciferase assays, background levels were estimated using lysate from nontransfected S2 cells.

Therefore spots near the background level have a higher QM if the background level is higher.