The phrase "altered or unaltered" is correct and usable in written English.
It can be used when discussing whether something has been changed or remains in its original state.
Example: "Please submit the document in either an altered or unaltered format, depending on your preference."
Alternatives: "modified or original" or "changed or unchanged".
What I find most alarming is that it is hard to tell the difference between the altered and unaltered pictures.
Both the altered and unaltered rock samples contain apatite, zircon and xenotime, which contain REEs as minor components.
Thus, we investigated anuran occupancy across three ephemeral aquatic system types (altered sites, unaltered sites, and roadside ditches) embedded in an intensively managed pine landscape in eastern North Carolina, USA.
The western Tennessee HGM has the ability to differentiate altered and unaltered rivers based mainly on changes to hydrologic floodplain functions, although functional capacity index values were validated from independent measures.
Goddard's group found that both the altered and unaltered yeast grew at the same rate under non-stressful conditions.
Feusner's team is now enrolling patients for the next stage of the study: seeing how patients react to altered and unaltered pictures of themselves.
By understanding cancer not just as a population of mutated cells but as a complex ecosystem consisting of mutated cells, non-mutated but epigenetically altered cells, unaltered cells and extracellular components, new modes of intervention can become apparent (Figure 1).
Geological field observations evidence that active and fossil Icelandic hydrothermal systems are typically embedded into an intercalation of almost completely altered and nearly unaltered volcanic rock layers.
Each pair of statements was classified as: unaltered, slightly altered, very altered and completely altered.
