The phrase "are active from the" is correct and usable in written English.
It can be used to indicate the starting point of an activity or operation, often followed by a specific time or date.
Example: "The system are active from the beginning of the month to ensure all processes run smoothly."
Alternatives: "are operational starting from" or "are engaged from".
Both the activator and repressor type genes are active from the very early stages of development [11].
Using our novel enhancer assay, we present evidence that both the Scl+19 and Gfi1-35 activetive from the Flk1+ mesoderm stage through to committed CD41+ haematopoietic cell stages of haematopoietic specification.
Representatives of ministries and national institutions from the Republic of Serbia, as well as representatives of relevant institutions from countries where Roma Health Mediators are active - from the former Yugoslav Republic of Macedonia, Bulgaria, Montenegro, Slovakia and Romania, as well as Roma Health Mediators, are participating in the work of conference.
He was active from the opening tip.
Rich was active from the start, wrapping up on the third day with Joshua Zucker.
He pledged transparency, saying he will be active from the outset, traveling around the archdiocese to meet his new flock.
The Geminids shower is active from the 8th to the 17th and reaches a peak over the 24 hours around 07:00 on the 14th with possible rates of 100 meteors per hour under ideal conditions.
We braved the heat to check out Storyville, the city's red-light district from 1897 to 1917, and the black vice district, which was active from the 1880s to the 1950s.
You also know, when you play alongside him, that he's going to be active from the first minute to the last, breaking down the other team's attacks and getting you going.
Bramante appears to have been active from the first in Rome on a variety of projects, such as a painting (now lost) at San Giovanni in Laterano celebrating the Holy Year 1500.
