The phrase 'exist in forms of' is correct and usable in written English.
You can use it when you want to describe how something exists in multiple different forms. For example: "Organic matter can exist in forms of liquid, gas, or solid."
Natural saponins generally exist in forms of glycosides, and different kinds of glycosides of saponin have been found in seeds of C. oleifera [ 13].
For instance, although antibodies against core proteins, HBeAg, polymerase and X protein can be detected in all or a portion of chronic HBV carriers, antibodies against three envelope proteins are not produced or exist in forms of immunocomplexes.
For the time being, ocean energy generation platform will still exist in form of independent platform of wave energy, tidal current energy, etc.
PRCV now exists in forms of high and low virulence.
According to IR spectra, Ti(IV) exists in form of a hexaazidotitanate complex.
The scanning and transmission electron microscopy indicated that in the PS matrix COPS existed in form of large, immiscible domains.
It is shown that the solution of the Helmholtz equation exists in form of a uniformly convergent sequence of iterations of the equivalent Volterra integral equation.
FTIR results showed that the interaction exists in form of hydrogen bonding complex, and it was stronger in PVC/DEHHP than in PVC/DOP system.
ZnO in the ZnO/SBA-15 nanocomposite calcined at 500 °C exists in form of non-crystalline clusters distributed in the channels of SBA-15.
Therefore, ZnO in the 20 wt% ZnO/SBA-15 nanocomposite calcined at 650 °C exists in form of the crystalline ZnO wurtzite phase.
ZnO in the 20 wt% ZnO/SBA-15 nanocomposite calcined at 500 °C exists in form of the non-crystalline ZnO phase or ZnO clusters.
