The phrase "a variable fraction of" is correct and usable in written English.
It can be used when discussing a portion or part of something that can change or vary in size or amount.
Example: "The project budget will be allocated based on a variable fraction of the total costs incurred."
Alternatives: "a changing portion of" or "an adjustable part of".
At every mercury injection pressure, the variations in saturation within the pore-space corresponding to certain radii r, is a variable fraction of the pore volume representing a percentage of the entire porous media.
Megafaunal species represent a variable fraction of the species examined (N = 1361 species sampled, including our megafaunal fruit dataset, the FRUBASE dataset and M. Galetti unpublished data) for different orders: Fabales (100%), Arecales (51.2%), and Ericales (36.4%); between 10 30% of species show megafaunal characteristics in Malvales (22.2%), Magnoliales (17.1%) and Celastrales (10.7%).
The heterozygous SNPs corresponded to a variable fraction of the total SNPs (from 8% for Cervil to 27% for Levovil).
From those data, confirmed also by our observation, only a portion of the circulating HCVAg seems to be associated with complete virions, implying that a variable fraction of circulating HCVAg may be secreted by the infected cells.
A variable fraction of CD27+ memory cells express only surface IgM (IgM-only memory) and may represent pre-SM cells that will eventually join the pool of isotype SM cells after participating in subsequent germinal center reactions [ 9, 11].
Nishimoto et al. identified HHV8 DNA sequences in a variable fraction of skin lesions such as Bowen's disease, actinic keratoses, leukoplakia, Paget's disease, melanoma, neurofibroma, and chronic dermatitis [ 36].
Hybrid-functional calculations were performed using PBEh, which mixes a variable fraction α of Hartree Fock exchange with PBE exchange.
Previous δ18O-labeled experiments show that a variable fraction (0 60%) of the oxygen in product sulfate is derived from dissolved O2, the other potential oxidant.
We found that overall, human dataset performance is strongly predicted by node degree (correlation of 0.94) with a variable fraction (approximately half to two-thirds) of the performance accountable by node degree performance (including in the meta-analysis dataset and protein-interaction dataset) (Figure 5A).
In general, it may be expected that this is a variable fraction depending on nutrient status (level of substrate fraction CS) and tissue composition.
These numbers were a variable fraction (between 15 % and 64%%) of the total numbers in either region, depending on the profile.
