The phrase "a spectrum of activity" is correct and usable in written English.
It can be used to describe a range or variety of actions, behaviors, or events within a particular context.
Example: "The research revealed a spectrum of activity among different species, highlighting their diverse behaviors in response to environmental changes."
Alternatives: "a range of activities" or "a variety of actions".
However, even across the broadly active chemical classes, there is a spectrum of activity.
Certainly, the impression that discussions on Gransnet give is that there's a spectrum of activity, from "none and not bothered" to "lots and up for more".
The 3-ylideneoxindole acetamides were found to have better anticancer activity than was indirubin-3'-oxime in several cancer cell lines and also displayed a spectrum of activity similar to that of the drug candidate roscovitine, a CDK inhibitor.
They were accused of participating in a free-ranging criminal ring that dabbled in a spectrum of activity, from illegal marijuana "grows" to a scheme to transport stolen liquor to China.
THR0921 has a spectrum of activity that differs from other commercially available thiazolidinediones (TZDs).
These tumours were found to have a spectrum of activity varying from a rapid fatal outcome within a few months to survival for many years.
A brief statement by the artist says that his picture represents a spectrum of activities at Fresh Kills from barges approaching on the water at the left to the unloading at docks in the middle to tractors hauling garbage-laden wagons uphill at the right.
This form of pre-mRNA post-transcriptional modification has the potential to expand the proteome exponentially, generating a spectrum of activities [16].
Second, arginine butyrate, which has been postulated to exert beneficial effects via a spectrum of activities associated with the histone deacetylase, mediated control of expression of a variety of genes and also to provide a substrate for NOS signaling pathways.
Though researchers' definition of sexual assault varies [ 3], it includes a spectrum of activities ranging from rape to physically less intrusive sexual contacts, whether attempted or completed [ 3].
The results indicate that the cytochemical heterogeneity and the variation in size between macrophage fractions is associated with a spectrum of activities.
