The phrase "as a major portion" is correct and usable in written English.
It can be used to indicate that something constitutes a significant part of a whole or a larger context.
Example: "The budget for the project was allocated as a major portion to research and development."
Alternatives: "as a significant part" or "as a substantial component".
But it had another reason: it was "mindful of the ongoing public reaction to a potential inversion" especially as a "major portion" of its revenues flow from US public healthcare programmes.
However, this adversely affects the electrical sensitivity of the device as a major portion of the resistor may be placed on the unstressed region of the cantilever.
Unfortunately, the company is less practiced than Apple, and has reverted back to the same old attacks as a major portion of that story.
That lead had emptied many of the 22,000-plus seats in Ashe Stadium, as well as a major portion of the media center.
The foundation's teacher-evaluation push led to an overemphasis on counting student test scores as a major portion of teachers' performance ratings — even though Gates himself eventually warned against moving too hastily or carelessly in that direction.
Moreover, since chemokine activity is produced as a major portion for the most rapidly expressed genes, the primary responses of the TNF-stimulated epithelium appear to be the paracrine propogation of the inflammatory response, with the induction of homeostatic factors a secondary priority for the cell.
As shown, a major portion of the patients presented with squamous cell carcinoma infiltrating the skull base (13/21), while the other 8 patients had other pathologies.
Edwards said it would prevent women suffering from syndromes such as anencephaly, where a major portion of the skull and brain is missing as an embryo develops, from having an abortion.
As a consequence, a major portion of the city was protected by the intervening hills, but even so, the bomb was dropped over the city's industrial valley midway between the Mitsubishi Steel and Arms Works in the south and the Mitsubishi-Urakami Ordnance Works in the north.
We identified area 8 as extending over a major portion of the inferior arcuate sulcus (Barbas and Pandya 1989).
One reason for the preference of sparsely forested areas could be the fact that the most frequently used winter den of a raccoon dog pair was situated in this habitat type and, as a result, a major portion of their GPS fixes was located close to the den.
