The phrase "a substantial concentration" is correct and usable in written English.
It can be used when discussing a significant amount or density of something, often in contexts like research, economics, or environmental studies.
Example: "The study revealed a substantial concentration of pollutants in the river, raising concerns about water quality."
Alternatives: "a significant amount" or "a considerable density".
A substantial concentration (30 95%) of the carbon crystalline phase is in the form of C60 and C70 fullerenes.
During the rrde experiments, a substantial concentration of hydrogen peroxide is built up in the bulk electrolyte.
Currently, based on the findings presented above, we conclude that the most favored environment for prebiotic nucleotide formation on the early Earth was a pond on dry land, with dissolved nucleotide subunits, and a substantial concentration of urea (Fig. 2).
The report says: "The Netherlands appears to have a substantial concentration of cryptomarket vendor activity (13.4 vendors per million population) in comparison to the United States (2.8 vendors per million population) and the United Kingdom (5.3 vendors per million population)." The study found that cryptomarkets had grown substantially "but not explosively" since Silk Road's takedown.
Slag from other furnaces of the time contained a substantial concentration of iron, whereas Laskill is believed to have produced cast iron quite efficiently.
Although the fertilization cones in both cases were rich in F-actin (Fig. 6A, arrow and arrowheads), the heparin-treated eggs exhibited a substantial concentration of actin fibers in the cortical domain underneath the fertilization cones (Fig. 6A).
In A3-YFP-expressing cells, stimulation with either NECA or HEMADO for 1 h caused a substantial concentration-dependent inhibition of FSK-stimulated [H]-cAMP accumulation, with HEMADO acting as a full agonist at this response compared with NECA.
TPEN crosses membranes rapidly to lower luminal free Ca2+ [28] and a 2-min preincubation with TPEN produced a substantial concentration-dependent inhibition of NICR, both in terms of amplitude and kinetics (IC50 of 17 and 27 μM respectively; Fig. 1A C).
Isolating exosomes with reliable quality and substantial concentration is a major challenge.
From the temperature dependence measurements, we also confirm that phonons are the dominant heat carries across the metal/graphene/metal interfaces despite a substantial carrier concentration of ≈3 × 1012 cm−2 induced in the graphene.
It showed that brimonidine tartrate can be sustained released from the contact lens without a substantial fluctuating concentration.
