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Discover LudwigThe phrase "an density of" is not correct in written English.
The correct article to use before "density" is "a" since "density" begins with a consonant sound.
Example: "There is a density of population in urban areas that is much higher than in rural regions."
Alternatives: "a level of density" or "a concentration of density."
Exact(1)
To assess bystander neuronal death by factors released by microglial cells following B[a]P treatment, BV-2 cells were seeded in 60 mm culture plates at an density of 5×105 cells/plate.
Similar(59)
A network that contains only isolated nodes has a density of 0, whereas a clique has a density of 1.
It has a 1080p resolution, a density of 423 pixels per inch and is pin sharp.
Hydrometers measure the ratio of a density of a liquid to the density of water.
It has an amber color and a density of 2.47 g/cm3.
This imagery adds a density of thought, a clarification of purpose and powerful sense of place.
Poetry is compressed language, a density of meaning in a small space, and we are a compressed state, a density of communities in a small landscape.
By 1999, Suffolk, with 1,383,847 people, had a population density of 1,506 people per square mile; Nassau, with a population of 1,305,057, had a density of 4,512 per square mile.
According to Kuo, this new iPhone would feature a 5.8-inch display with a density of 458 pixels per inch.
The localization density map of a subunit was contoured at a density of 0.15.
"A density of 20,000 hens should not be a problem on a well-managed farm".
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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