in 50% concentration vs at 50% concentration

Both 'in 50% concentration' and 'at 50% concentration' are commonly used phrases in English. The choice between them depends on the context in which they are used. 'In 50% concentration' is often used when referring to the actual substance or solution being present in a certain concentration, while 'at 50% concentration' is used when specifying the concentration level at a particular point or location.

Last updated: March 30, 2024 • 896 views

This phrase is correct and commonly used when referring to the actual substance or solution being present in a certain concentration.

"in 50% concentration"

This phrase is used to indicate that a substance or solution is present in a specific concentration level.

Examples:

The solution is prepared in 50% concentration.
The chemical is used in 50% concentration for the experiment.

Show examples from the web [+]

Where initial margin is collected in cash, the 50 % concentration limit referred to in point (a) shall also take into account the risk exposures arising from the third-party holder or custodian holding that cash.
When tested for activity against laboratory strains of HBV, the 50% inhibitory concentration (IC50) value for emtricitabine was in the range of 0.01 to 0.04 µmol/ l.
The 50% inhibitory concentration (IC50) value for emtricitabine against laboratory and clinical isolates of HIV-1 was in the range of 0.0013 to 0.5 µmol/ l.
In recent studies using human cord blood lymphocytes and human embryonic kidney 293 cells, EC50 values (50% inhibitory concentration) ranged from 14-302 nM against laboratory and clinical isolates of HIV-1.
Population pharmacokinetic analyses have shown that smokers have almost 50% lower plasma concentrations of duloxetine compared with non-smokers.
These EC50 values are well below the 50% cellular toxicity concentration range of 87 µM to > 100 µM.
The human oral bioavailability of emedastine is approximately 50% and maximum plasma concentrations were achieved within one-two hours after dosing.
Population pharmacokinetic studies analyses have shown that smokers have almost 50% lower plasma concentrations of duloxetine compared with non-smokers.
3. The accuracy and precision of the method must be ± 50 % at a concentration which represents twice the value of the limit of determination.
The 50% inhibitory concentration (IC50) of amprenavir ranged from 0.012 to 0.08 µM in acutely infected cells and was 0.41 µM in chronically infected cells (1 µM = 0.50 µg/ ml).
The EC50 values for tenofovir were in the range of 0.14 to 1.5 µmol/ l, with CC50 (50% cytotoxicity concentration) values > 100 µmol/ l.
In the short term test the log % concentration remaining is plotted against time and the slope of the initial part (10-50 % degradation) of the plot is equivalent to K1, the (pseudo) first order constant.
EID50 = 50% Embryo infective dose: the virus titre required to produce infection in 50% of the embryos inoculated.
For example, an EC50 is a concentration estimated to cause an effect on a test end point in 50 % of an exposed population over a defined exposure period.
This concentration should inhibit gas production by about 50 %.
LC50 (median lethal concentration) is a statistically derived concentration of a substance that can be expected to cause death during exposure or within a fixed time after exposure in 50 % of animals exposed for a specified time.
The report notes that, incredibly, in 50% of the cases of agricultural fraud, it was impossible to identify the products concerned.
Urine GAG levels were normalized below the upper limit of normal (defined as 126.6 µg GAG/ mg creatinine) in 50% of the patients receiving weekly treatment.
Leukocytosis occurred in 50% of patients with APL, as determined by haematology assessments, rather than adverse event reports.
A transient diffuse swelling may occur at the vaccination site in 50% of the animals, which persists for about 14 days.

Alternatives:

at a concentration of 50%
with a concentration of 50%
at 50% strength
at a 50% level
at a 50% ratio

This phrase is correct and commonly used when specifying the concentration level at a particular point or location.

"at 50% concentration"

This phrase is used to specify the concentration level at a particular point or location.

Examples:

The reaction occurs at 50% concentration.
The enzyme functions optimally at 50% concentration.

Show examples from the web [+]

3. The accuracy and precision of the method must be ± 50 % at a concentration which represents twice the value of the limit of determination.
When tested for activity against laboratory strains of HBV, the 50% inhibitory concentration (IC50) value for emtricitabine was in the range of 0.01 to 0.04 µmol/ l.
Where initial margin is collected in cash, the 50 % concentration limit referred to in point (a) shall also take into account the risk exposures arising from the third-party holder or custodian holding that cash.
The 50% inhibitory concentration (IC50) value for emtricitabine against laboratory and clinical isolates of HIV-1 was in the range of 0.0013 to 0.5 µmol/ l.
In recent studies using human cord blood lymphocytes and human embryonic kidney 293 cells, EC50 values (50% inhibitory concentration) ranged from 14-302 nM against laboratory and clinical isolates of HIV-1.
Population pharmacokinetic analyses have shown that smokers have almost 50% lower plasma concentrations of duloxetine compared with non-smokers.
These EC50 values are well below the 50% cellular toxicity concentration range of 87 µM to > 100 µM.
The human oral bioavailability of emedastine is approximately 50% and maximum plasma concentrations were achieved within one-two hours after dosing.
Population pharmacokinetic studies analyses have shown that smokers have almost 50% lower plasma concentrations of duloxetine compared with non-smokers.
The 50% inhibitory concentration (IC50) of amprenavir ranged from 0.012 to 0.08 µM in acutely infected cells and was 0.41 µM in chronically infected cells (1 µM = 0.50 µg/ ml).
The EC50 values for tenofovir were in the range of 0.14 to 1.5 µmol/ l, with CC50 (50% cytotoxicity concentration) values > 100 µmol/ l.
In the short term test the log % concentration remaining is plotted against time and the slope of the initial part (10-50 % degradation) of the plot is equivalent to K1, the (pseudo) first order constant.
The factory is operating at 50% production capacity.
AEP is controlled at 50 % by Electrabel Italia, and at 50 % by AceaElectrabel.
Some people are at 50% or less.
No wonder the plant's working at 50%.
Even at 50%, nobody's better.
Interferon alfa-2b treatment is to be restarted at 50% of the previous dose.
These 4 combined programs are running at 50% of expected mortality.
Once improved to <= grade 2, reinstate Vectibix administration at 50% of the original dose.

Alternatives:

in a concentration of 50%
with a concentration of 50%
at 50% strength
at a 50% level
at a 50% ratio

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in 50% concentration vs at 50% concentration