The phrase "are mainly constituted" is correct and usable in written English.
It can be used when describing the primary components or elements that make up a particular subject or entity.
Example: "The committee members are mainly constituted of experts in environmental science and policy."
Alternatives: "are primarily made up of" or "are chiefly composed of".
At veraison, the constitutive pectins of the cell walls of the olives are mainly constituted by insoluble protopectins.
Topographic atomic force microscopy (AFM) images showed that films are mainly constituted by unevenly dispersed grains.
In the other solutions they are mainly constituted by boric acid (or borates, depending on the solution pH).
Micro-Raman spectroscopy revealed that the residues obtained between 600°C and 1200 °C are mainly constituted of disordered carbon.
These EOs are mainly constituted of monoterpenes including camphor, which contributes an off odor reducing the olfactory appeal of the oil.
Raman spectroscopy analysis indicates that DLC films are mainly constituted by amorphous and crystalline phases, with a variable ratio of sp2/sp3 carbon bonds, and sp3 bond content of more than 10%.
This result can be interpreted as follows: The SI is mainly constituted by the classical fingerprint-based comparison, strongly corrected with some constitutional information like number (and type) of atoms and number (and type) of bonds; this part of the SI could be considered as the core contribution to generalizability of the SI.
The optimal formulation was mainly constituted with 11.84% (w/w) capryol 90 containing emodin, 20.16% (w/w) cremophor RH 40/transcutol HP.
The insoluble matrix is mainly constituted by protein (casein) and the NaCl present in dissolution form is consequence of salting operation.
These findings have placed the heart squarely among other organs with regenerative potential despite the fact that the working myocardium is mainly constituted of terminally differentiated cells.
It was found that when fv ranged from 0%to10%0%, the skeleton of the sample was mainly constituted by fines with the coarse grains floating in the fines matrix.
