The phrase "are composed of some" is correct and usable in written English.
It can be used when describing the components or elements that make up a whole, often in a scientific or technical context.
Example: "The molecules in the solution are composed of some essential nutrients that promote plant growth."
Alternatives: "are made up of some" or "consist of some".
The result of X inactivation is that all normal females are mosaics with regard to this chromosome, meaning that they are composed of some cells that express genes only from the maternal X chromosome and others that express genes only from the paternal X chromosome.
In contrast, metamorphosed rock samples are composed of some combination of illite, interstratified illite smectite, CV, and chlorite.
Impulsive hybrid systems are composed of some continuous variable dynamic systems along with certain reset maps that define impulsive switching among them.
Bonneviot's Xenoestrogens represent a narrative of seepage; not to mention unnerving the viewer, who realizes they are composed of some of the same chemicals as the sterile-looking sculptures.
Bonneviot's Xenoestrogens represent a narrative of seepage; not to mention unnerving the viewer, who realises they are composed of some of the same chemicals as the sterile-looking sculptures.
However, most of them are small organic molecules and are composed of some fixed small structures, called functional groups.
Indonesia is composed of some 17,500 islands, of which more than 7,000 are uninhabited.
[And] just like his great novels, it is packed with mind-expanding ideas, beautifully dry humour and is composed of some of the most stunning lines of dialogue you are likely to hear on stage this year".
According to recent measurements by the Planck spacecraft, about 27 percent of the universe, by mass, is composed of some unknown form of matter unlike the atoms that make up us and everything we can see.
Each row is composed of some branches.
Each level is composed of some components with different functions.
