are not observed

USAGE SUMMARY

The phrase "are not observed" is correct and usable in written English.
It can be used in contexts where you want to indicate that something is not being noticed, acknowledged, or followed. Example: "In many cases, the safety protocols are not observed, leading to potential hazards."

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

However, these modes are not observed in the experimental spectra.

Nature

Such fluctuations are not observed in nonmigratory species.

Britannica

But these are not observed in the ARPES data.

Nature

Significant changes of other miRNAs are not observed.

Nature

Dripping instabilities are not observed close to the ridge.

Physics of the Earth and Planetary Interiors

Layers cracking, clogging of mesh cells are not observed.

Catalysis Today

Such predictions are not observed in existing vibration models.

Journal of Sound and Vibration

Nitrogen impurities are not observed in the epitaxial graphene layers.

Carbon

These features are not observed for [001] specimens.

Acta Materialia

Even presidents are not observed so closely and so continuously.

The New York Times

Persistent seasonal preferences or abundance of one morphotype over another are not observed.

Nature

Expert writing Tips

Best practice

When using "are not observed", ensure the context clearly indicates what is doing the observing and what is expected to be observed. This clarifies the meaning and prevents ambiguity.

Common error

Avoid overusing "are not observed" in passive constructions where the active observer is omitted. Whenever possible, rephrase to specify who or what is failing to observe, leading to a stronger and more direct statement.

Linguistic Context

The phrase "are not observed" functions primarily as a passive construction indicating the absence or lack of detection of something. Ludwig AI indicates that it's usable in written English to indicate that something is not being noticed, acknowledged, or followed.

Expression frequency: Very common

Frequent in

Science

76%

Academia

13%

News & Media

11%

Less common in

Encyclopedias

0%

Formal & Business

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "are not observed" is a grammatically sound and frequently used expression, particularly within scientific, academic, and news contexts. As highlighted by Ludwig AI, it effectively communicates the absence or lack of detection of a particular phenomenon. When using "are not observed", clarity is key. Ensure the subject and observer are clearly defined to avoid ambiguity. While common, avoid overuse in passive constructions and consider specifying the observer for a more direct statement. Related phrases such as "are undetected" or "cannot be detected" can offer stylistic variation.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

are undetected

Replaces "observed" with "undetected", focusing on the inability to detect something.

are not visible

Substitutes "observed" with "visible", highlighting the lack of visual appearance.

cannot be detected

Emphasizes the impossibility of detection using an alternative phrasing.

were not found

Shifts the focus to the outcome of a search or investigation, indicating nothing was found.

do not appear

Uses "appear" instead of "observe", suggesting a lack of presence or manifestation.

are absent

Replaces the entire phrase with a direct statement of absence.

are unnoticeable

Indicates something is so subtle that it cannot be noticed.

escape detection

Implies an active avoidance of being detected.

go unnoticed

Focuses on the lack of attention given to something.

remain unseen

Highlights that something continues to be not seen or detected.

FAQs

How can I use "are not observed" in a sentence?

Use "are not observed" to indicate that something is not being seen or detected in a particular context. For example, "Significant changes "are not observed" in the data after the treatment."

What can I say instead of "are not observed"?

You can use alternatives like "are undetected", "are not visible", or "cannot be detected" depending on the specific meaning you want to convey.

Is it better to use "are not observed" or "were not observed"?

The choice between "are not observed" and "were not observed" depends on the tense of your sentence. Use "are not observed" for present tense and "were not observed" for past tense. For example, "These effects "are not observed" currently," versus "These effects "were not observed" in the previous study."

What does "are not observed" imply?

"Are not observed" implies that something is either absent, not detectable, or not being noticed within a specific context. This could be due to limitations in equipment, methodology, or the inherent nature of the phenomenon under investigation.