at fixed concentrations

USAGE SUMMARY

The phrase "at fixed concentrations" is correct and usable in written English.
It can be used in scientific or technical contexts to describe a situation where substances are maintained at specific, unchanging levels. Example: "The experiment was conducted at fixed concentrations of the reactants to ensure consistent results."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

33 human-written examples

The tuning of accelerator and inhibitor concentrations was carried out at fixed concentrations of the brightener and leveller and at fixed cathode current density.

Electrochimica Acta

(b) Lineweaver Burk plot of initial-reaction velocities versus D-GAP concentrations at fixed concentrations of pyruvate.

Nature

(a) Lineweaver Burk plot of initial-reaction velocities versus pyruvate concentrations at fixed concentrations of D-glyceraldehyde 3-phosphate (D-GAP).

Nature

An apparent KmTPP value for TPP was estimated to be 17±5 μM at fixed concentrations of pyruvate (200 μM, ≈Kmpyruvate) and D-GAP (200 μM, ≈KmD-GAP).

Nature

The extent of inhibition at fixed concentrations of the sugar depended on the type of matrix used for the assay.

Tetrahedron

Moreover, where the 3D integrity of an EB is maintained, cytokines or drugs of interest to stimulate differentiation are often added directly to the culture medium at fixed concentrations and effects are usually limited to the outer layers of the EB.

Journal of Controlled Release

Human-verified similar examples from authoritative sources

Similar Expressions

26 human-written examples

At fixed concentration in brancher, an increase of CTA concentration led to polymers with lower PDI.

Polymer

The maximum 87.9% chemical oxygen demand (COD) was removed at hydraulic retention time (HRT) of 6.0 h at fixed concentration 4000 mg/L.

Bioresource Technology

The effect of anions on ζ-potential was studied at fixed concentration of CTAB (10−4 mol L−1 ≈ 0.1 cmc), by varying the concentration and nature of anion in the added 1 1 electrolytes (NaCl, NaBr, NaF, NaClO4, NaI and NaNO3).

Electrochimica Acta

Electronic spectra were also recorded for different concentration of CT-DNA at fixed concentration of Ag and Au NPs (Figs. S3 and S4).

Journal of Nanostructure in Chemistry

Furthermore, this suspension was treated with different concentrations (1 ×, 2 ×, and 4 × MIC) of test agents for 1 h or at fixed concentration (4 × MIC) for different time intervals (30, 60, 90 and 120 min).

AMB Express

Expert writing Tips

Best practice

When describing experimental setups, clearly state which substances are maintained "at fixed concentrations" to ensure reproducibility and clarity.

Common error

Avoid using "at fixed concentrations" when you actually mean "at appropriate concentrations". "Fixed" implies an unchanging level, while "appropriate" suggests a level suitable for a particular purpose, which might vary.

Linguistic Context

The phrase "at fixed concentrations" functions as an adverbial phrase modifying a verb, describing the conditions under which an action occurs. As Ludwig AI exemplifies, it specifies that certain substances are maintained at unchanging levels during an experiment or process.

Expression frequency: Common

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Academia

0%

Ludwig's WRAP-UP

The phrase "at fixed concentrations" is a common and correct expression, particularly within scientific contexts. As noted by Ludwig AI, this phrase indicates that specific substances are kept at constant levels. It's essential for describing experimental setups and ensuring clarity. Alternatives such as "at constant concentrations" may be used. When writing, avoid confusion with similar terms such as "appropriate concentrations", as they have distinct meanings. The phrase is most frequently found in scientific publications, reflecting its role in precise scientific communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

at constant concentrations

Replaces "fixed" with "constant", emphasizing the unchanging nature of the concentrations.

at stable concentrations

Substitutes "fixed" with "stable", highlighting the steadiness of the concentrations.

at set concentrations

Uses "set" instead of "fixed", indicating pre-determined concentrations.

at controlled concentrations

Emphasizes the active regulation of concentrations using "controlled".

at specific concentrations

Replaces "fixed" with "specific", focusing on the particular concentrations used.

with concentrations held constant

Restructures the phrase to emphasize the action of keeping the concentrations constant.

with concentrations maintained

Highlights the active maintenance of concentrations at a certain level.

at predetermined concentrations

Implies that the concentrations were established in advance.

in invariant concentrations

Uses more formal language to express the unchanging nature of the concentrations.

under consistent concentration levels

Emphasizes the consistency of concentration levels, implying uniformity.

FAQs

How can I use "at fixed concentrations" in a sentence?

You can use "at fixed concentrations" to describe experimental conditions, for example: "The reaction was carried out "at fixed concentrations" of enzyme and substrate."

What's a good alternative to "at fixed concentrations"?

Alternatives include "at constant concentrations", "at stable concentrations", or "at set concentrations", depending on the specific nuance you want to convey.

Is it more appropriate to say "at fixed concentrations" or "at variable concentrations"?

The choice depends on the experimental design. Use "at fixed concentrations" when the concentration of a substance is intentionally kept constant. Use "at variable concentrations" when the concentration is intentionally changed.

What does "at fixed concentrations" imply in a scientific context?

In a scientific context, "at fixed concentrations" implies that the levels of certain substances are deliberately maintained constant throughout an experiment or process to isolate the effects of other variables.