The phrase "a certain density of" is correct and usable in written English.
It can be used when discussing the concentration or amount of something within a specific context, such as scientific or technical writing.
Example: "The researchers measured a certain density of particles in the solution to determine its purity."
Alternatives: "a specific concentration of" or "a particular amount of".
But it takes a certain density of the stuff before the fire is going to catch and go somewhere.
Another mutation or two "could make it a very serious issue," he said, but at the moment, "it takes a certain density of dogs to keep it going".
Currents at depth may be studied with Swallow floats, which are adjusted to be neutrally buoyant at a certain density of seawater.
It has to do with a certain density of souls, with vertical living, with the inherent limitations of an island, its shoreline functioning like the rim of a pot.
It is demonstrated that starting from a certain density of the lattice structure the value of fundamental frequency does not depend on the number of helical ribs.
This involves opening one 'insignia' store aimed at building up its name in a new location, before setting up smaller shops of different brands to reach a certain density of outlets that allows it to create economies of scale and boost profit margins.
In the bacterial cell division process discussed, it is reported that the oscillations occur only for a certain density range of minE proteins for a fixed density of minD proteins [20, 21].
When a certain density or "quorum" of extracellular autoinducer molecules is reached, the autoinducer binds to a dedicated transcriptional regulator, thereby activating transcription of specific genes.
When the sensor node of a certain density fails, the sensor node data transmission vector of the density trend is shown in Fig. 1.
Typically, most of these works have addressed the redistribution of mobile sensors to achieve a uniform coverage of a certain density in the target area.
Others want their pets to sleep only on beds of a certain density and to receive special squeaky toys.
