at concentration vs in concentration

Both 'at concentration' and 'in concentration' are used in English, but they have different meanings and contexts. 'At concentration' is commonly used to refer to being physically present at a specific concentration level or location. On the other hand, 'in concentration' is used to describe a state of focused attention or mental absorption. Therefore, the choice between the two depends on whether you want to convey physical presence or mental focus.

Last updated: March 30, 2024 • 3660 views

at concentration

This phrase is correct and commonly used in English to indicate being physically present at a specific concentration level or location.

You can use 'at concentration' when referring to being at a specific concentration level or location, such as 'The chemical was at concentration X.'

Examples:

The students were at concentration level during the exam.
The solution was at the required concentration for the experiment.

Show examples from the web [+]

Dasatinib is a potent, subnanomolar inhibitor of the BCR-ABL kinase with potency at concentration of 0.6-0.8 nM.
Nevertheless, there is a clear effort at concentration, which is in keeping with your requests.
HIV-1 has been passaged in vitro with lopinavir alone and with lopinavir plus ritonavir at concentration ratios representing the range of plasma concentration ratios observed during Kaletra therapy.
Confectionery or beverages containing glycyrrhizinic acid or its ammonium salt due to the addition of the substance(s) as such or the liquorice plant Glycyrrhiza glabra, at concentration of 100 mg/kg or 10 mg/l or above.
Carbon dioxide at concentrations over 30 % shall not be used to stun or slaughter poultry in a slaughterhouse.
In vitro experiments have shown that the hepatic metabolism of saquinavir becomes saturable at concentrations above 2 μg/ml.
Entecavir was clastogenic to human lymphocyte cultures at concentrations substantially higher than those achieved clinically.
Etoricoxib is excreted in the milk of lactating rats at concentrations approximately two-fold those in plasma.
Hepatic oxygen delivery and consumption were not significantly altered at concentrations up to 2.0 MAC.
Even at concentrations of five ppm, they could suffocate.
Chemicals should not normally be tested at concentrations higher than 1000 mg/kg dry mass of soil.
Sulphite at concentrations of at least 10 mg/kg
For relatively insoluble substances that are not toxic at concentrations up to the saturation point the highest achievable concentration should be tested.
Testing at concentrations that are likely to be corrosive or irritant to the gastrointestinal tract should be avoided.
Dilutions of corrosive or irritating test chemicals may be tested at concentrations that will yield the desired degree of toxicity.
Testing corrosive and/or irritating test chemicals at concentrations that are expected to cause severe pain and/or distress should be avoided to the extent possible.
In laboratory animals, fosaprepitant in non-commercial formulations caused vascular toxicity and hemolysis at concentrations below 1 mg/ ml and higher, dependent on the formulation.
Telithromycin is excreted in the milk of lactating animals, at concentrations about 5 times those of maternal plasma.
Icatibant is excreted in the milk of lactating rats at concentrations similar to those in maternal blood.
Celecoxib is excreted in the milk of lactating rats at concentrations similar to those in plasma.

Alternatives:

at a concentration
at the concentration

in concentration

This phrase is correct and commonly used in English to describe a state of focused attention or mental absorption.

You can use 'in concentration' when describing someone's focused mental state, such as 'She was completely in concentration while painting.'

Examples:

The pianist was in deep concentration during the performance.
He was in concentration as he solved the complex puzzle.

Show examples from the web [+]

Hyperactive behavior and deficiencies in concentration.
Packagings for desensitized or phlegmatized substances shall be closed to prevent changes in concentration during carriage.
The fall in concentration is assumed to follow an exponential decay process.
It would explain why your recent lapses in concentration started when he arrived.
From the increase in concentration of nitrite and nitrate, calculate the oxygen used (see Annex V).
If nitrification occurs but is not complete, calculate a correction for the oxygen consumed by nitrification from the changes in concentration of nitrite and nitrate (Annex V).
Bioaccumulation is the increase in concentration of the test substance in or on an organism relative to the concentration of the test substance in the surrounding medium.
Momentary lapse in concentration.
Momentary lapse in concentration.
However, if nitrification is not complete but does occur, correct for the changes in concentration of nitrite and nitrate, determined by analysis, (see Appendix 5).
That applies not only to the provision of all kinds of multimedia services, it also involves an appropriate approach to the trend in concentration of the media, which is also progressing at a pace that is hard to follow.
Gentlemen, we cannot permit ourselves lapses in concentration.
One lapse in concentration might cost him his life.
Process by which toxic contaminants are destroyed or reduced in concentration.
He stayed too long in concentration camps.
Some of them spent three, four years in concentration camps with whites.
Think of the people in concentration camps.
The Croats were putting Muslims in concentration camps.
I therefore approve of an approach that takes into account the differences in concentration of volcanic dust.
They built the rockets in concentration camps.

Alternatives:

focused
absorbed in concentration

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at concentration vs in concentration