levels is known

USAGE SUMMARY

The phrase "levels is known" is not correct in standard written English.
It appears to be a grammatical error, likely due to subject-verb agreement, as "levels" is plural and should be paired with "are" instead of "is." Example: "The levels are known to fluctuate throughout the year."

⚠ May contain grammatical issues

Science

Human-verified examples from authoritative sources

Exact Expressions

23 human-written examples

The influence of the cabin interior treatment on boundary layer noise levels is known to be significant, and we thus extend the model of Part I '1' to include it.

Journal of Sound and Vibration

In cultured cell and animal studies, type 1 equilibrative nucleoside transporter (ENT1, slc29a1), which regulates adenosine levels, is known to regulate ethanol sensitivity and preference.

Plosone

Also, another host-related signal, increased carbon dioxide levels is known to alter expression of the B. anthracis toxin genes as well as others [8], [9], [10].

Plosone

One possible mechanism underlying these dose-dependent effects is generation of intracellular ROS, which at low levels is known to increase cell proliferation and at high levels induces cell death through DNA damage [30].

Plosone

In a consumer-resource resource context, the destabilization of an interaction that emerges with increases in the efficiency of consumption towards low resource levels is known as the paradox of enrichment.

Plosone

The difference between the baseline premeal and the 2-hour postprandial blood glucose levels is known as the "delta".

Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy

Human-verified similar examples from authoritative sources

Similar Expressions

37 human-written examples

High LDL and total cholesterol levels were known to be associated with a variety of diseases.

Encyclopedia Britannica

For example, melatonin levels are known to affect body temperature selection in reptiles.

Encyclopedia Britannica

These models can be used to predict dough and bread properties when additive levels are known.

Journal of Food Engineering

Hepcidin levels are known to be abnormally low in HFE-linked Hereditary Hemochromatosis (HH) [13].

Plosone

Serum leptin levels are known to be influenced by diurnal fluctuations [53] and dietary intake [52].

Plosone

Expert writing Tips

Best practice

Always use the correct subject-verb agreement. Since "levels" is plural, use "are" instead of "is". For example, "The levels are known to fluctuate."

Common error

Avoid using "is" with plural nouns like "levels". Ensure that the verb agrees with the subject in number. The correct form is "levels are known".

Linguistic Context

The phrase "levels is known" functions as a statement indicating that certain levels are recognized or understood. However, it contains a grammatical error. Ludwig AI indicates the phrase requires subject-verb agreement correction.

Expression frequency: Common

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Encyclopedias

0%

Ludwig's WRAP-UP

The phrase "levels is known" is commonly found in scientific literature to indicate an understanding or recognition of certain levels. However, Ludwig AI identifies that it is grammatically incorrect due to a subject-verb agreement issue; the correct form is "levels are known". Therefore, when using this phrase, ensure that you use the correct plural form to maintain grammatical accuracy and clarity.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

levels are recognized

This alternative corrects the grammatical error, using the correct verb conjugation for the plural noun.

levels are established

This alternative offers a more formal tone and emphasizes the setting of specific levels.

levels have been identified

This alternative highlights the process of finding or determining the levels.

levels are documented

This alternative suggests that the levels have been officially recorded or reported.

levels are well-known

This alternative emphasizes the common knowledge or awareness of the levels.

levels are understood

This alternative suggests a deep comprehension of the levels and their significance.

levels are measured

This alternative focuses on the quantification aspect of the levels.

levels are regulated

This alternative emphasizes the control and management of the levels.

levels are standardized

This alternative highlights the conformity of the levels to a specific set of rules or guidelines.

levels are accepted

This alternative emphasizes the agreement or approval of the levels within a certain community or context.

FAQs

How to use "levels are known" in a sentence?

Use "levels are known" followed by an infinitive phrase to describe what is understood about certain levels. For example, "These "levels are known" to fluctuate throughout the day".

What can I say instead of "levels is known"?

You can use alternatives like "levels are recognized", "levels are established", or "levels have been identified" depending on the context.

Which is correct, "levels is known" or "levels are known"?

"Levels are known" is the correct phrase because "levels" is a plural noun and requires the plural verb "are".

What's the difference between "levels is known" and "levels are known"?

"Levels is known" is grammatically incorrect due to a subject-verb agreement error. The correct form, ""levels are known"", uses the plural verb "are" to agree with the plural noun "levels".