The phrase "comma of" is not correct in written English.
However, you can use the phrase "comma for" in certain situations. For example, you could say: "I used a comma for emphasis in this sentence."
We have observed HNC and HCN in the coma of comet C/2002 C1 (Ikeya-Zhang).
The film slips into a tasteful coma of its own making.
To some eyes, Abramson's New York Times had woken from a coma of complacency.
However, ICE carried no instruments to study the nucleus or coma of the comet.
Nadal's forehand winner crosscourt was enough to drive Murray into a deep coma of depression.
In this work, the NH2 and NH radial emission profiles in the sunward coma of Halley's comet are studied.
The rapid rise of the Kindle caught the Big Six in a complacent coma of their own making.
Both the astigmatism and coma of concave gratings over the entire spectral range are designed to be eliminated.
For minor surgical procedures, it does the trick without resorting to the carefully controlled coma of general anesthesia.
We discuss the crystallinity and the temperature of water ice grains in the coma of comet C/2002 T7 (LINEAR) at 3.5 AU from the Sun.
One way to measure Russia's slow recovery from the 70-year coma of Communism is to count lobster tanks and sushi bars.
