The phrase "a main origin of" is correct and usable in written English.
It can be used when discussing the primary source or cause of something.
Example: "The researchers identified a main origin of the environmental changes as deforestation."
Alternatives: "a primary source of" or "a key cause of".
A principle component analysis revealed the main origin of heavy metals: soil parent materials for Cu, Pb, and Zn; atmospheric deposition during mining processes for Cr, and Hg; and human farming activities for Cd.
The variation of In composition and well thickness is therefore the main origin of this wavelength shift in a single wire.
The main origin of replication is located in a highly conserved region and consists of a conserved stem-loop structure, and open reading frames encoding the conserved CDC6 cell division control protein, a signal sequence peptidase and DNA polymerase B [ 42].
The main origin of the isolates used in this study was an area with persistently low prevalence of P. malariae and P. vivax located at the Atlantic forest region of São Paulo State [ 9].
A cell type implicated in several important facets of CLD are hepatic stellate cells (HSCs), as they are the most important source of matrix and the main origin of myofibroblasts in the liver, which renders them an important target for the treatment of liver fibrosis [ 35].
Cryptosporidium is the main origin of worldwide waterborne epidemic outbreaks caused by protozoan parasites.
The nature of bubble population appeared to be the main origin of differences between the two modes of gas introduction.
Thus, the main origin of the gain in accuracy when using genomic selection is due to genotyping the evaluated animals.
The main origin of light-induced drifts is located on the interface between electrolyte and the surface of Ta2O5 films.
