The phrase "added at once" is correct and usable in written English.
It can be used to indicate that something was included or incorporated immediately or simultaneously.
Example: "The new features were added at once to the software update, enhancing its functionality."
Alternatives: "included immediately" or "incorporated right away".
"We need to move more quickly," he added, at once treasuring and regretting what he described as the city's small-town resistance to change.
When higher amounts of CaCl2 were added intermittently, or when the optimal amount of CaCl2 were added at once, PRF clots were never prepared (Kawase, unpublished observations).
After the resulting solution was maintained at −78 °C for 30 min, the Cu OTf 2 (9.10 mmol, 5.0 equiv) was added at once (exposed to air for seconds).
However, during SSF the release of sugar is not controlled, as all the cellulase enzymes are added at once.
The formation of the 2 1 adduct was lower under these conditions compared to reactions when equimolar or excess methylgyoxal was added at once.
The simplicity of one-pot is that all chemicals and solvents are added at once, creating simultaneous reactions resulting in the production of free base methamphetamine.
The author, I should add at once, is an old and dear friend, and a still older and dearer friend of my wife, Martha Parker.
(Let me add at once that this is how everybody plays these days: Montreal's Flying Frenchmen have become the Flopping Foreigners; the Habs' fine rookie Brendan Gallagher alters the formula only by using his non-size to slip between the huge, shoving human pylons, pillars, and posts).
If Lee possessed the "true killer instinct," a ruthless audacity in battle second to none, Winik adds at once that there was also "a surprising and decidedly unusual feminine side to him: a sweetness... a tenderness unthinkable in other great fighting men".
The plot, O'Sullivan adds, is "at once ridiculous and smart," and as for the copious violence, "most of it is bloodless and surprisingly balletic.
The cultures were washed and fresh medium with 6TG added at least once per week, in order to maintain the desired 6TG concentration.
