The phrase "already been characterized" is correct and usable in written English.
You can use it when discussing something that has previously been described or defined in a certain way.
Example: "The chemical compound has already been characterized in several studies, providing valuable insights into its properties."
Alternatives: "previously defined" or "already described".
But long before then, according to the C.I.A.'s files, Mr. Szulc had already been characterized as "anti-agency" and "under suspicion as a hostile foreign agent".
Although the structure of DNA molecules has already been characterized by other means, it will be possible to use the system both to look at the components that make up the basic DNA structure as well as to make images of interactions among biomolecules, Dr. Rugar said.
Note that this is something that has already been characterized (in official statements) by FBI Director James Comey as a mistake.
Similarly, all the shear stress coefficient values were used to generate a flow curve for a fluid that had already been characterized with Anton Paar rheometer and once again Metzner and Otto shear stress coefficient values gave the best match.
It is worth mentioning here that each of the MFC6, MFC1, and MFC4 composites has already been characterized for lower values of heat of adsorption for CO2 in comparison with pristine Mg-MOF-74, as shown earlier in Fig. 8a.
Although networks of O2 pathways have already been characterized for a small number of proteins, the general properties and locations of these pathways have not been previously compared between proteins.
All the representative targets of the FASII system have already been characterized by X-ray crystallography or nuclear magnetic resonance (NMR), which should facilitate the rational design of inhibitors.
All the shear coefficient values were used to generate a flow curve for a fluid that had already been characterized with Anton Paar rheometer and when these flow curves were compared to that generated from Anton Paar rheometer data, (k_{2}^{prime }) and (k_{text{MO}}^{prime }) provided a good match.
The laws have already been characterized by critics as "chilling" and "an affront to the basic rule of law".
The expression profile of aPKCζ has already been characterized [17].
Although its sequence has already been characterized in our previous publication [9], its functional implication is largely unexplored till date.
