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Discover LudwigThe phrase "a concern on" is not correct in standard written English.
The correct expression would typically be "a concern about" or "a concern regarding."
Example: "There is a growing concern about the impact of climate change on our environment."
Alternatives: "a worry about" or "an issue regarding."
Exact(57)
However, by the time of second mitosis (which can easily go beyond 20-30 hours after starting the ex vivo culture), the condition of the culture would not be an ideal one, leaving a concern on how valid the measured cell cycle time might be.
The paper began with a concern on the application of correlation for validation purposes in language testing whereby one test (usually a cloze) has been suggested to replace another.
At this point there's a concern on some peoples' parts".
There is a concern on all sides about Yitzhak Rabin's policy of "immobilism".
House prices were frequently mentioned in southern England; elsewhere pensions were a concern on the doorstep.
That is not a concern on the ground, where the thickness of the atmosphere offers adequate protection.
"That's a concern on the west slope of Colorado: his brother's actions in Washington on oil and gas jobs and how it's affecting the economy," Mr. Tipton said.
The rib remained a concern on Sunday, as did New York's hilly course — not the climbing, necessarily, but the coasting, which McFadden said was not her strongest suit.
A| This is probably mildew and is not a concern on plants which will be dropping their leaves or dying back like perennials.
We know that battery life was a concern on PSP, and we certainly look to improve upon that, but no details yet.
Similar(1)
A valid concern on a day when the temperature was past 90 degrees.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com