The phrase "activity is much lower" is correct and usable in written English.
It can be used to describe a situation where the level of activity or engagement has significantly decreased compared to a previous state.
Example: "During the winter months, the activity is much lower in the park, as fewer people come out to enjoy the outdoors."
Alternatives: "activity has significantly decreased" or "activity is considerably reduced."
The catalyst activity is much lower than the bulk catalyst, which may be due to the less active site over the catalyst.
The seismic tremor observed along SAFS is similar to the subduction-zone NVT, although the signal is much weaker and the level of activity is much lower (Nadeau and Dolenc 2005; Shelly and Hardebeck 2010; Gomberg et al. 2008; Peng et al. 2009; Thomas et al. 2009).
Although the R. flavefaciens type strain is C94, its cellulolytic activity is much lower than that of FD-1, particularly on more crystalline forms of cellulose [5].
In the joint fluid, however, the esterase activity is much lower than in whole blood or plasma [ 23].
Hereby, type 1 receptor has a greater affinity to VEGF, but its tyrosine kinase activity is much lower than that of type 2 receptor, which is considered one of the regulatory mechanisms preventing excessive VEGF activity.
Serum esterase activity is much lower in rats than in humans [ 5] and, in the light of the present results, we propose that it does not represent functional PON1 activity, but rather a more non-specific activity due, at least in part, to the action of other serum esterases, or to the esterase capability of serum albumin [ 46].
By contrast, plasma zinc and ALP activity were much lower in zinc-deficient piglets at slaughter (P < 0.001).
The measured MnP activity was much lower in the media containing HA compared to the control jars (media without HA).
Thereafter, the activity dropped dramatically until, at 90 h, the activity was much lower than that observed when the induction temperature was maintained at 25 °C.
Although UCH L1 proteins were expressed at similar levels, uch l1 promoter activity was much lower in the presence of C90S and H161D UCH L1 mutants, indicating that the deubiquitinating activity of UCH L1 is necessary for its promoter activation.
