The phrase "a series of active" is correct and usable in written English.
It can be used when describing multiple instances or occurrences of something that is currently in action or functioning.
Example: "The project involves a series of active discussions among team members to ensure all perspectives are considered."
Alternatives: "a number of active" or "multiple active".
In this work, a series of active and inexpensive catalysts were synthesized for bio-oil HDO, i.e., activated carbon (AC -supported nickel phosphide AC -supportedosphide catalysts, with a metal/P molar ratio varyinickelm 5/2, 3/2, 1/1, 1/2, 1/3.
Traversing the country from north to south is a series of active fault lines, along which earthquakes frequently occur.
There was a series of active governors nominated by the parties between 1988 and 2000 (Michael S. Dukakis, Bill Clinton and George W. Bush).
The weekly sessions consisted of a series of active discussions and physical tasks that contained messages around the health benefits of physical activity.
Correlation of the results of metal (Mg2+ and Mn2+) titration studies with HIV IN inhibition for a series of active and inactive compounds provides support for the model.
Although dietary supplements do not constitute medicinal products, a series of active ingredients and particularly fixed-dose combinations are offered as "dietetic foodstuff for special medical purposes (balanced diet)", for instance "for the treatment of migraine".
To explore the relations between the DAD distribution and the temperature dependence of intrinsic KIEs (KIEint), a series of active-site mutants was constructed focusing on Ile14, which holds the H-donor close to the H-acceptor.
Active species 1 interconverts between a series of other active species, all of which exist in equilibrium.
To test this model Despina, together with Fausto Ulloa, made a series of dominant active Gli constructs each producing a different level of transcriptional activity.
Dating from the Pennsylvanian period of the Carboniferous era, the forest lies entombed in a series of eight active mines.
Bruant was the most-notable of a family that produced a series of architects active in France from the 16th to the 18th century.
