The phrase "are maintained mainly" is correct and usable in written English.
It can be used when discussing the primary method or focus of maintenance for something, such as systems, processes, or conditions.
Example: "The standards of quality in our production line are maintained mainly through regular inspections and employee training."
Alternatives: "are primarily maintained" or "are chiefly upheld".
These data demonstrate that GSCs are capable of utilizing different modes of cell division to maintain a stem cell population and GSCs are maintained mainly by symmetric, not by asymmetric cell divisions.
More than half the numbers of coding 5′CGIs with H1-HM (denoted as H1-HM-coding-5′CGIs), non-coding intragenic CGIs with H1-HM, and intergenic CGIs with H1-HM were lowly methylated in sperm cells, suggesting that their CpG rich sequences are maintained mainly by their LM in germline cells.
Public order was maintained mainly through fear engendered by the secret police.
When medical records were maintained mainly on paper, it could take weeks to find out that an infection was becoming more common or that tainted greens had appeared on grocery shelves.
The narrative form of radiology reports, however, is maintained, mainly because we have been trained to do so.
The normal unperturbed daytime D-region from which VLF signals are usually reflected is maintained mainly by direct Lyman-α radiation (121.6 nm) from the sun that partially ionizes the minor neutral constituent nitric oxide (at a height around 70 km).
Although the diversity of the obtained repertoire was maintained mainly by the third complementarity determining region of the heavy chain (CDR-H3), their changes in the near UV circular dichroism resulting from NP-binding allowed for classification into three groups according to the same rules applied in the pathway classification of the maturated Abs.
Such environment is thought to be maintained mainly through GSH [54].
Mammalian intracellular redox homeostasis is maintained mainly through transcriptional control of an array of antioxidative genes upon exposure to environmental insults that generate oxidative stress.
The population of C. acidophila in the field is maintained mainly due to release from competitors and predators.
If the trait variance starts from a small value, it converges to the smaller equilibrium, where the trait variance is maintained mainly by the mutation drift balance.
