The phrase "a marginal portion" is correct and usable in written English.
It can be used to refer to a small or insignificant part of something, often in discussions about data, resources, or contributions.
Example: "The study revealed that a marginal portion of the population was affected by the new policy."
Alternatives: "a small segment" or "a minor part".
This would leave only a marginal portion of the site to be used as the Libeskind team had planned.
Due to yield and palatability problems, these species cover only a marginal portion of the worldwide potato production.
* p <.05; ** p <.01; ***p <.001 Socio-demographic factors (age, gender and years of experience) accounted for a marginal portion of the variance (4%).
The combination of drought and heat stress in plants is a unique stress sharing a marginal portion of the molecular responses activated by drought and heat stress alone [ 12– 157 57– 57].
However, the high number of this category could also be due to the fact that the current collection of repeat elements in the database only represented a marginal portion of the elements for the wheat genome.
Musashi showed faint but clear expression along the ventricular lining (Fig. 2A, B), with a few expressing cells also consistently observed in the marginal portion of the neuroepithelium (often showing a bilateral symmetrical distribution, arrows on Fig. 2B).
The aim of this study was to evaluate the effect of anodized implants coated with combined rhBMP-2 and recombinant human vascular endothelial growth factors (rhVEGFs) on vertical bone regeneration in the marginal portion of the peri-implant.
The medial and marginal portion of duodenal diverticulum can only be inspected by the side-viewing endoscope.
The dimension from the marginal portion of the peri-implant mucosa to the marginal level of bone-to-implant contact has been found to be about 3 mm.
Boron neutron capture therapy (BNCT) with intratumoral injection of immunoliposomes is able to destroy malignant cells in the marginal portion between normal tissues and cancer tissues from the side of 4He generation.
Deformation, based on the evidence now available, seems to have shifted through time from the interior portions of the geosyncline northward to the marginal portions.
