The phrase "are quickened by a" is correct and usable in written English.
It can be used in contexts where something is being accelerated or enhanced by a particular factor or influence.
Example: "The creative process is often quickened by a burst of inspiration."
Alternatives: "are accelerated by a" or "are enhanced by a".
We know that American road movies, by and large, are quickened by a target or a deadline, while their European cousins — Wim Wenders's "Alice in the Cities" and "Kings of the Road," Manuel Poirier's "Western," or almost anything by Aki Kaurismäki — take more time to survey the passing land, but, wherever you are, and whatever your hurry, why not meander for a while?
Yet even his apparently simple and inane sentences are quickened by an irrepressible alliteration and assonance: A silver-and-sable skybab squirrel sat sampling a cone on the back of a bench.
Often the material facts are quickened by light, turning a mundane scene into a moment of transcendental revelation.
The ordinariness of the scene is quickened by the incongruous view of a rearing horse in a western landscape, out a window to the right.
There is much exposed flesh and in several cases hints of Sapphic intimacy, but carnality is quickened by something more subtle, a preoccupation with the erotic intercourse of speech.
And Russell does leave behind a lot of admirers, including his mother, Gerda, another woman for whom a long-festering guilt is quickened by his death.
On his fourth album as Caribou, Dan Snaith continues the pleasurable drift into dance music that picked up on his 2010 album Swim (which boosted his popularity as a live act) and was quickened by subsequent releases under his Daphni alias.
Or will he be bypassed for a new graduate and never find his way back into the middle class?" The pace of innovation, say executives from a variety of industries, has been quickened by businessmen like Mr. Jobs.
Strout's prose is quickened by her use of the "free indirect" style, in which a third-person narrator adopts the words or tone a particular character might use.
There is a tightly wound still life, "Fruit and Baltimore Oriole," by an artist known only as Wagguno; a Phillips portrait of a little girl in a white dress clutching some strawberries; and William Matthew Prior's "Little Miss Fairfield," in which the clutched prop is a toy rabbit, and the picture's life is quickened by the black lines of shadow defining the child's arms and hands.
The process, however, has been quickened by the rapid decline of industry in the inner city.
