The phrase "a key quantity of" is correct and usable in written English.
It can be used when discussing an important or significant amount of something in a specific context, such as scientific, economic, or analytical discussions.
Example: "In our research, we found that a key quantity of the substance was missing, which affected the overall results."
Alternatives: "an essential amount of" or "a crucial measure of".
Magnetic helicity, a topological quantity which measures the twist, the writhe and the shear of a magnetic field, has recently appeared as a key quantity to understand some mechanisms of the solar activity such as Coronal Mass Ejections and flare onset.
The proposed approach allows to control and tune exciton exciton Coulomb coupling, a key quantity for the design and realization of novel single-electron/exciton devices.
Mallett et al. [ 2] found that although 96%% of studies in their review of survival models reported the number of patients included in analyses, only 70%% reported the number of events – a key quantity for time-to-event data.
In this context, a key quantity in the study of quantum walk dynamics is the probability (P(n)=_{p} langle{n} vert operatorname{Tr}_{c}[hat{rho}_{pc}(t)]vert {n} rangle_{p}) that position n in the position space is occupied at the discrete time t.
From the length change associated with the removal of grain boundaries in the wake of crystallite growth, a structural key quantity of grain boundaries, the grain boundary excess volume or expansion eGB="(0.46±0.11)×10-10 ×10-10directly determined.
From the length change associated with the removal of grain boundaries in the wake of crystallite growth, a structural key quantity of grain boundaries, the grain boundary excess volume or expansion e GB = (0.46 ± 0.11 ) × 10 - 10 m was directly determined.
We focus on a key quantity in admixed populations, namely the fraction of admixture from one of the source populations for a random individual in H at a randomly chosen locus.
A key quantity that determines the population-level dynamics of infections is the effective reproductive number R t, defined as the mean number of secondary infections produced by an infected individual at any time t.
(7 This vector encodes the causal effect of drug varied among all inheritance combinations and is the key quantity of interest in the analysis of drug placebo-treated drug placebo-treated
