The phrase "a slight background" is correct and usable in written English.
It can be used to describe a minor or subtle context or setting related to a subject or topic.
Example: "The painting features a vibrant foreground with a slight background of rolling hills."
Alternatives: "a subtle backdrop" or "a faint context".
Soon enough, two of Mr. Wolfson's City Hall colleagues arrived: Deputy Mayor Dennis M. Walcott, who specializes in education, and Micah C. Lasher, the city's top lobbyist in Albany (where Ms. Black must obtain a waiver to take the chancellor's job, given her slight background in education).
Although slight background H2 associated with biological activity cannot be excluded, these observations make a purely superficial origin for the H2 highly improbable.
Also, there was slight background tissue autofluorescence associated with IF whereas AR produces none.
Heterogeneous staining and slight background staining was noted in most of the TMA core samples studied.
In the esophageal epithelium of wild-type mice slight background staining was observed.
The ENP-only plates reflected slight background noise and thus were subtracted from data collected from ENP/cell proliferation evaluation.
An average grayscale mean value from the slight background fluorescence in the green channel from hairy roots induced with A. rhizogenes without the binary vector was also determined.
Although some unavoidable, slight, background reaction is evident with different intensity in both panels, no cell staining can be seen on the right one (BPH case).
The 502 different PCR products (2 for each gene + internal controls) that were spotted on the arrays had the following distribution in the 4 quality categories (Fig 2A): 1 = single band (426): 2 = single band with slight background (48); 3 = single band with strong background (14); 4 = multiple bands with background or only background (14).
