The phrase "a lower portion" is correct and usable in written English.
It can be used to refer to a part that is situated lower than another part, often in a physical or metaphorical context.
Example: "The sculpture features a lower portion that is intricately designed, contrasting with the simpler upper section."
Alternatives: "a bottom section" or "an inferior segment".
They commit even a lower portion of all serious crime.
AOL Time Warner generates about a quarter of its revenue from advertising, a lower portion than many of its peers, but the company remains vulnerable.
The study found that these grasshoppers prefer a lower portion of nitrogen, or protein, than any other species studied, challenging the existing belief that insect herbivores are limited by the amount of protein found in plants.
Triplets consist of a crown of stone and a lower portion (not necessarily the whole pavilion) of stone, sandwiching a layer of foil or other material to give the stone the desired colour.
Bagwell may well reach Cooperstown; recent inductees like Andre Dawson, Bert Blyleven, Goose Gossage and Jim Rice all received a lower portion of the vote than Bagwell in their second year on the ballot.
"Harvard M.B.A.'s have a very high earning potential," said Dave Girouard, the founder of Upstart and a former Google executive, "and that means they can raise more money for a lower portion of income".
A decreased N content can be explained by a lowered portion of active biomass owing to intracellular storage of polysaccharides (details in [10,11]).
Behind the position of the nasals (which are missing in the only known skull) is an interlacrymal depression, a lowered portion of the skull; the suture (connection) between the two frontal bones is incompletely closed there.
Spines were imaged in two parts: an upper part comprising the cervical and most of the thoracic spine, and a lower part comprising the lower portion of the thoracic spine and the lumbar spine.
However, a significantly lower portion of infants in the treated group had an HBsAg titer >5 cut-off index (normal value: <1], compared to those in the untreated group (16.7% [95% CI: 12.61-20.79] vs. 43.4%[955% CI: 38.22-48.58]; P < 0.05).
Still, only about half of the nation's work force today is in unions, the official said, and a much lower portion of workers in private and foreign companies.
