The phrase "a subtle effect on" is correct and usable in written English.
It can be used when describing a nuanced or understated influence that something has on another thing.
Example: "The new policy had a subtle effect on employee morale, gradually improving their overall satisfaction at work."
Alternatives: "a slight impact on" or "a delicate influence on".
Treatment of Rag1−/− with rabbit hyperimmune anti-vaccinia serum had a subtle effect on the morbidity/mortality of this strain, but it was effective in reduce viral titers in ovaries.
It is found that the use of [CF3(CF2 8COO]2Mg·yH2O/Co II) acetate is as effective as the [CF3(CF2)8COO]2Co·xH2O and the fluorinated chain length used has a subtle effect on the catalytic rate measured.
Some professional tasters believe that even good corks have a subtle effect on the taste of good wine.
If you put on something that raises your game, it will have a subtle effect on how you feel, think, and behave".
While I know the text is supposed to be the most important thing, and I'm well aware that the biographical details of a writer's life should be incidental to the reading experience, the acknowledgement pages can have a subtle effect on the way I read a book.
Yet the shift is having a subtle effect on Bulgarian political discourse, argued Marta Vachkova, who hosts a television program called "The Women"."When a woman is sitting between two men, she is a mediator and a neutralizer of all that adrenaline, with the result that the decisions taken are more balanced," Ms. Vachkova said in an interview.
To investigate whether there is a subtle effect of the G-quadruplex on nascent strand progression, replication products were analyzed on urea-PAGE gels.
Nevertheless, a subtle effect of common GCK variants on beta cell function cannot be ruled out.
Our studies do not rule out a subtle effect of deleting c-myc on other aspects of liver physiology.
But I believe there may have been a subtler effect on Berlin's thinking, which has something important to say to us today.
This is a subtle effect for any single gene, affecting on average only ~1 2 amino acids per peptide, and can only be confidently established by means of the large number of genes available for analysis.
