The phrase "a definite effect" is correct and usable in written English.
It can be used when discussing a specific and clear impact or result of an action or event.
Example: "The new policy had a definite effect on employee productivity, leading to a noticeable increase in output."
Alternatives: "a clear impact" or "a specific result".
This had a definite effect on me.
At higher moisture content DP showed increasing tendency, while temperature didn't have a definite effect.
Shanghai seethes with translators and the authors they have chosen to work on have a definite effect upon their personalities.
"As a woman and a designer, going through all these milestones has had a definite effect on my perspective.
Unlike the two factors, the hardness does not have a definite effect on the kinematic performance, on which a further study is required.
"We've not been able to pinpoint a definite effect, but my gut is that absolutely there's an effect," said Dominique Raccah, above, chief executive of Sourcebooks, a publisher in Naperville, Ill.
Fortenberry said the May 19 demonstration and other student criticism had a very definite effect on the administration because they evidenced student concern and highlighted issues that administrators had not considered thoroughly.
Although study conditions and systems differ in the aforementioned studies, a clear and definite effect of methotrexate on the prostaglandin pathway in synovium-derived cells is not apparent.
One possible motivation for assuming a deterministic relationship would be if there were firm theoretical reasoning to suggest a quantifiable and definite effect of population structure within the hierarchy; we are unaware of any such information in the current literature but suspect that further work in this area may provide clues as to what shape such a relationship may take.
27 We used 1 ng/ml IL1α and 2.5 mg/ml HA species (except for HAoligo), as these concentrations of IL1α and HA showed a definite stimulatory effect on ADAMTS4 expression and a maximal inhibitory effect on IL1α-induced ADAMTS4 expression, respectively (data not shown).
You can sort of see some rationale behind it; bee stings obviously have a definite physical effect on the body, they're 100% natural (another substitute for effectiveness), and a localised swelling certainly would remove wrinkles, albeit temporarily and painfully.
