The phrase "at substantial levels of" is correct and usable in written English.
It can be used when discussing quantities, concentrations, or degrees of something, often in scientific or analytical contexts.
Example: "The study found that the chemical was present at substantial levels of concentration in the water supply."
Alternatives: "at significant levels of" or "at considerable levels of".
Several input-output databases that cover the entire world economy at substantial levels of regional and sectoral detail are in preparation; they include EXIOBASE (Tukker et al. [2009]), Eora (Kanemoto et al. [2011]), WIOD (WIOD [2011]), and a widely-used one of earlier vintage, GTAP (Narayanan and Walmsley [2008]).
However, there was detection at substantial levels of unspecified animal species in most products tested.
In C2C12 myoblasts, TBP protein is present at substantial levels despite the presence of Huwe1 E3 ligase.
At fairly substantial levels of exposure, lead inhibits the enzymes ferrochelatase and delta amino levulinic acid dehydratase, resulting in microcytic hypochromic anemia.
Despite the great benefits, the technology currently faces several challenges such as a narrow range of available bioink materials, bioprinting-induced cell damage at substantial levels, limited mechanical and structural integrity of bioprinted constructs, and restrictions on the size of constructs due to lack of vascularization and porosity.
Meanwhile, phytoestrogens, EQU in particular, were detected at substantial levels, but the toxicological significance of these compounds in the milieu with potent steroidal estrogens appears to be minimal.
However, they also found that many long-term disability recipients were capable of work at substantial levels.2.2
Specifically, Stapleton et al. (2006) note that beneficiaries often feel dependent on these programs and fearful of engaging in work activity, while program administrators and the rehabilitation providers who provide employment supports to these populations often view beneficiaries as incapable of working at substantial levels.
The values of ICC were at substantial levels.
All of the other MSL proteins were found at substantial levels in the cytoplasm.
We extended the gestational range of the 2006 cohort to include babies born at 26 weeks, as we were concerned about the lack of a relation between gestation and disability in the original 1995 study and had concerns about potential rates of impairment in survivors at 26 weeks: indeed, we have shown substantial levels of mortality (19%) and neurodevelopmental impairment at follow-up (21%).
