"improve their activities" is a correct and usable phrase in written English.
You can use it when you want to talk about making improvements to something that multiple people are doing. For example, "We need to come up with ways to improve their activities so that the results are better."
Incorporating conformationally constrained peptide segments into the inhibitors did not improve their activities.
In a context of high competitiveness, companies have to improve their activities in terms of excellence but also of nature.
Effects of high intensity pulsed electric field treatment were further investigated on antioxidant peptides to improve their activities.
Covalent immobilization of the enzymes onto insoluble supports not only permits their reusability and easy separation of enzymes from the product but also, if properly performed, may improve their activities, stability and hence reduces the cost of process.
In fact, to improve their activities, synthetic analogs of oleanolic acid have been developed and actually are under clinical evaluation as anti-tumoral therapeutic agents for hematologic malignancies.
A fractionation of these samples in a polarity gradient could improve their activities.
In addition, borate activation in the presence of an aluminum scavenger did not improve their activity, presumably due to ligand transfer from Hf to Al during catalytic reaction, and Hf-complex without aminopyridinato ligand was inactive [34].
Kong et al. reported that doping is one of possible methods to improve their activity [28].
Scientists can introduce new genes and sets of genes, allowing organisms to make novel proteins, or alter existing genes to improve their activity in the cell.
Sulfation of these biphase catalysts does not improve their activity and stability as that of the single phase anatase TiO2 catalyst.
Environmental enrichment (EE) replicates mind-body therapy by providing complex housing to laboratory animals to improve their activity levels, behavior, and social interactions.
