"relaxed expression" is correct and usable in written English.
You can use it to describe a person's facial expression that conveys a feeling of being relaxed and at ease. For example, "She had a relaxed expression on her face as she enjoyed the sunshine."
We took advantage of the β1a-null zebrafish relaxed expression system that allows us to directly compare the effects observed in vitro to an intact in vivo muscle system.
However, in none of these conditions were NCR genes expressed except for the NCR genes with relaxed expression described above.
Understatement and a more relaxed expression replaced extroversion and high-tension virtuosity.
Wearing straw thongs on her feet, a Puerto Rico T-shirt and a relaxed expression, Destinee Caraballo, 20, doesn't fit the public perception of a homeless person.
G., the volunteer, was a fifty-three-year-old man wearing a Puma baseball cap and a relaxed expression; he laughed out loud when he saw the dolphin.
Suspicious enemies could be mollified if the player's avatar approaches them while the player has a friendly and relaxed expression on her face; characters could be intimidated by facial expressions of anger.
More importantly, DEVGs (either "tight" or "relax" expression) don't mean no-changes.
An example of response modalities comprising the item 'facial expression' is 0 = relaxed face; 1 = concerned face; 2 = face sometimes grimacing; 3 = frightened, face contorted with pain.
We relaxed the expression for TOE as defined by Ighravwe et al. (2015), to a stochastic constraint using the concept of normal distribution (Wu 2008) as Eq. (12).
General impression of open demeanour: A smiling and relaxed facial expression was interpreted as an open demeanour and was the primary demeanour described by the parents.
In highly expressed genes, NNC is preferred over NNT in most two-fold degenerate NNY codons, whereas the codon preference reverses, if functional constraints are relaxed and expression levels decrease [ 16, 18].
