The phrase "a single spot of" is correct and usable in written English.
It can be used to describe a small, distinct area or mark of something, often in a visual context.
Example: "There was a single spot of paint on the floor that had not dried yet."
Alternatives: "a lone mark of" or "one small area of".
Many of Mr. Missé's steps came in percussive clusters too dense to decipher, some bombarding a single spot of floor with rapid-fire insistence, others suddenly pouncing like a cat.
If you are able to get there today, for instance, you will experience Anthony McCall's sublime solid-light films, including the great Line Describing a Cone in which an entire gallery is filled with nothing but a single spot of light that gradually grows into a beam and eventually a vast hollow cone picked out with swirling fog.
We shall, therefore, seek a material with a single spot of PAPC for all its component atoms.
The simultaneous detection of two analytes, chicken IgY (IgG) and Staphylococcal enterotoxin B (SEB), in a single spot of a planar surface fluorescent immunoassay was demonstrated using luminescent semiconductor quantum dot nanocrystal (QD) tracers.
Evidently, at some level the brain is 'deciding' that it is more likely to be confronted with a single spot of light that is both in motion and changing its colour than two flashing lights of different colours.
We frequently observed a single spot of DipM staining colocalized with a portion of an FtsZ ring at the expected division site.
So would Wolfgang Staehle's sequence of pictures of a single spot on the Hudson River once painted by Thomas Cole and Frederic Church.
The light intensity of a single spot on the membrane was detected using a ChemiDocXRS imaging system (Bio-Rad).
Spots were quantified on the basis of their relative volume (%V), which was determined by the ratio of the volume of a single spot to the whole set of spots.
As it stands, the NRC requires-at most-a single, spot inspection of the buried piping systems no more than once every 10 years.
In most instances, a single spot specimen of placenta weighing only a few grams was obtained, without specifying the placental area sampled.
