The phrase "a moderate concentration" is correct and usable in written English.
It can be used when describing a level of concentration that is neither too high nor too low, often in scientific or analytical contexts.
Example: "The study found that a moderate concentration of the solution yielded the best results in the experiment."
Alternatives: "a balanced level" or "an average concentration".
A moderate concentration ratio and timely regenerations of the membrane should be arranged for acceptable efficiency in practice.
It was found that within the ranges tested, the greatest reductions of turbidity were achieved with a moderate concentration of calcium lactate at pH 5.
A sample prepared with a NaCl flux with a moderate concentration of solute exhibited the highest and stable photocatalytic activity for carbon monoxide production among the prepared samples.
The fluorescent intensity at 600 nm increased as acid concentration from a lower to a moderate concentration and decreased at higher concentrations.
In this paper, we propose a new configuration of solar concentration optics utilizing modularly faceted Fresnel lenses to achieve a uniform intensity on the absorber plane with a moderate concentration ratio.
The high-active state of palladium was associated with palladium in the metallic state with a high concentration of chemisorbed oxygen and a moderate concentration of a surface oxide.
A concentration-dependent decrease was observed in Bcl-2 protein level whereas Bax showed a moderate concentration-dependent increase after 48 h of ST treatment.
In addition, oral chemotherapy could maintain a sustained moderate concentration of the drug in the circulation to achieve a prolonged exposure of cancerous cells to the drug as well as to avoid high peak above maximum tolerable concentration.
There is no green pigment in green eyes; like the color of blue eyes, it is an optical illusion; its appearance is caused by the combination of an amber or light brown pigmentation of the stroma, given by a low or moderate concentration of melanin, with the blue tone imparted by the Rayleigh scattering of the reflected light.
When delivered as a pulse, H2O2 is depleted fairly rapidly, whereas the GOx-treated cells were exposed to a more sustained moderate concentration over the full 48-h incubation time.
Flies exposed to a continuous stream of moderate concentration ethanol vapor (47%) exhibit a characteristic pattern of locomotor activity.
