The phrase "activity concentrations compared with" is correct and usable in written English.
It can be used when discussing the levels of a particular substance or element in different samples or environments, often in scientific or technical contexts.
Example: "The study analyzed the activity concentrations compared with the baseline measurements taken in previous years."
Alternatives: "activity levels in comparison to" or "concentration levels relative to".
For F-FDG PET/CT, hotspots were defined as foci with increased activity concentration compared with the surrounding tissues as previously described (Fischer et al, 2009).
However, yellow marrow (adipose tissue), a non-hematopoietically active tissue, is considered to be a marrow component with reduced activity concentration compared to RM.
Pawlowski et al. (2003) also reported a lower calculated estrogenic activity, based on chemical concentrations, compared with measured estrogenicity in the rYES for two WwTW effluents in Germany.
The obtained data showed that the patients with autism spectrum disorder had significantly higher Pb and Hg levels and lower GST activity and vitamin E concentrations compared with the controls.
Apparently, starch derivatives showed enhanced antifungal activity against three fungi at the tested concentrations compared with starch.
For the subgroup of sepsis patients we could demonstrate that resistin is significantly increased in patients with impaired liver function, as evaluated by serum pseudocholinesterase activity and bilirubin concentration, compared with healthy controls.
The SOD activity of 5 g/L SMS significantly decreased corresponding to the considerable decrease in Fe concentration compared with that of the other SMS concentrations.
Human cell lines, grown in vitro, also exhibit elevated concentrations of DHFR activity compared with that of human tumors or cells obtained in situ, potentially as a consequence of the traditional use of high concentrations of folic acid in tissue culture medium (25).
Consumption of cranberry leaf extract beverage elevated (P <.05) blood glutathione peroxidase activity, whereas LCJC consumption increased (P <.05) glutathione concentrations and superoxide dismutase activity compared with placebo.
