The phrase "a steep portion" is correct and usable in written English.
It can be used to describe a section of a path, road, or terrain that has a significant incline.
Example: "The hikers struggled to climb a steep portion of the trail that led to the summit."
Alternatives: "a steep section" or "a steep segment".
Driving on a steep portion of Lake Shore Road, Mr. Petersen recalled an earlier era in Lake Geneva.
With the whipping wind and blowing snow, the race was delayed 30 minutes and the start moved down the hill, eliminating a steep portion.
These specific ratios were chosen because they A) fell in a steep portion of the standard curve so that the light scattering signal is the most sensitive to the amount of Spy added and because B) the Spy concentrations at these ratios were high enough to enable pipetting high enough volumes to minimize pipetting errors.
Second, because of hyperinflation tidal breathing occurs at a steeper portion of the pressure-volume curve of the lung, further increasing the load.
For all pretreatments except immunization, the shape of the curve of loss of radioactivity from the lungs vs time was biphasic, with an initial steep portion representing intravascular death of the tumor cells, followed 1--2 days after tumour-cell injection by a shallow exponential curve.
A fluid challenge causing an increase in stroke volume (SV) >10% (steep portion of the curve) defines a patient as a fluid responder and suggests that subsequent fluid challenge is unlikely to result in overfilling.
The volume challenge should increase the stroke volume as a result of acutely increased preload in a heart operating on the steep portion of the cardiac function curve.
The volume challenge should increase the SV as a result of acutely increased preload in a heart operating on the steep portion of the cardiac-function curve [ 20, 21].
In the given figures, all of the curves for Cr3+, Ni2+ and Zn2+ follow same features, in which the initial steep portion followed by a gradual linear portion was observed.
As demonstrated by the Frank-Starling curve, the beginning of the fluid challenge induces a more significant increase in stroke volume on the steep portion of the curve because of a preload reserve in the left ventricular function.
Pharmacologically, this is an attempt to remain on the steep portion of the "on-target" pharmacodynamic dose-response curve of two active agents of different therapeutic classes, thereby maximizing efficacy and minimizing bothersome dose sensitive "off-target" side effects.
