Used and loved by millions
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
are concentrated of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are concentrated of" is not correct in English.
It should be "are concentrated in" or "are concentrated on" depending on the context. Example: "The chemicals are concentrated in the solution to enhance their effectiveness."
⚠ May contain grammatical issues
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
Furthermore, a number of investigations are concentrated on one type of DM only.
"A lot of people are concentrated on what is one of the most most visceral and visible environment devastating practices".
News & Media
Most of his constituents are concentrated on the other side of the county in Thousand Oaks.
News & Media
Besides, Wheeler notes, the increase was concentrated: Of the 47 states tested in both 2009 and 2011, only 16 had higher scores this time around.
News & Media
Others, meanwhile, are concentrating on getting out of debt.
News & Media
One area of investigation is concentrated on the role of lipid biometabolites in their regulation of inflammation during neovascular diseases.
Academia
The evaluation of Strong and Clear was concentrated to one of these counties, Värmland.
Science
Volcanism, coronae, and rifts tend to be concentrated in regions of upwelling, while plains deformation belts are concentrated in regions of downwelling.
Encyclopedias
Homicides are concentrated in areas of high poverty.
News & Media
Na+ and K+ are concentrated at depths of 0.2 0.4 m.
Science
They are concentrated in pockets of California and New York and in the Washington area.
News & Media
Expert writing Tips
Best practice
Always use the correct preposition after "are concentrated". "In" indicates location, while "on" indicates focus. For example, say "resources are concentrated in urban areas" or "efforts are concentrated on solving the problem".
Common error
Avoid using "of" after "are concentrated". This construction is grammatically incorrect. Double-check your preposition to ensure it fits the intended meaning (location vs. focus).
Source & Trust
60%
Authority and reliability
1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are concentrated of" functions as part of a prepositional phrase where the preposition is misused. This construction aims to describe where something is gathered or focused, but the incorrect preposition renders it grammatically flawed. Ludwig AI analysis confirms this issue.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "are concentrated of" is grammatically incorrect. The proper usage involves using either "in" to indicate location or "on" to indicate focus. As Ludwig AI confirms, there are no valid examples of this phrase in authoritative sources. Alternatives such as "are concentrated in" or "are focused on" should be used instead to accurately convey the intended meaning. Always ensure the correct preposition is used to avoid grammatical errors and maintain clarity in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are concentrated in
Changes the preposition to "in", indicating location or containment instead of possession.
are focused on
Replaces "concentrated" with "focused", indicating attention or emphasis.
are centered on
Substitutes "concentrated" with "centered", suggesting a central point of attention.
are gathered in
Uses "gathered" to imply a collection or accumulation in a specific location.
are clustered in
Replaces "concentrated" with "clustered", indicating a grouping or collection in a particular area.
are amassed in
Employs "amassed" to convey the idea of accumulating something in a specific place.
are collected in
Uses "collected" to imply a gathering of items or elements in a defined space.
are grouped within
Replaces "concentrated" with "grouped", suggesting a structured arrangement within a certain boundary.
are assembled within
Employs "assembled" to convey the idea of bringing together different parts within a specific context.
are located in
Substitutes "concentrated" with "located", indicating a position within a certain area.
FAQs
What preposition should I use after "are concentrated"?
The correct prepositions to use after "are concentrated" are "in" or "on", depending on the intended meaning. Use "in" to indicate a location (e.g., "resources are concentrated in cities"). Use "on" to indicate a focus or target (e.g., "efforts are concentrated on finding a solution").
Is "are concentrated of" grammatically correct?
No, "are concentrated of" is not grammatically correct. The correct usage is "are concentrated in" or "are concentrated on", depending on the context.
What can I say instead of "are concentrated of"?
Since "are concentrated of" is incorrect, use alternatives like "are concentrated in", "are focused on", or "are centered on" to convey a similar meaning.
What's the difference between "are concentrated in" and "are concentrated on"?
"Are concentrated in" indicates a location or containment, while "are concentrated on" indicates a focus or emphasis. For example, "Resources are concentrated in urban areas" versus "Efforts are concentrated on solving the problem".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
60%
Authority and reliability
1/5
Expert rating
Real-world application tested