The phrase "are characterized upon" is not correct in standard written English.
It is not a commonly used expression and may confuse readers. A more appropriate phrase would be "are characterized by."
Example: "The species are characterized by their unique adaptations to the environment."
Alternatives: "are defined by" or "are marked by."
Bulk SiCN glasses, derived from polymer precursors with tailored architectures, were characterized upon pyrolysis at 1000 °C and subsequent annealing at 1400 °C and 1540 °C.
Despite their potential relevance for engineering of isobutanol-producing yeast, these enzymes have not previously been characterized upon expression in S. cerevisiae.
Severity of illness was characterized upon admission to ICU using the Simplified Acute Physiology Score (SAPS II) [ 17] and the Sequential Organ Failure Assessment (SOFA) [ 18] scoring systems and again on Day 7. Clinical and laboratory variables were collected on Day 1 and again on Day 7 in survivors.
Electrochromic materials are characterized by their colour changes upon applied voltage.
Traditional Markov chain Monte Carlo (MCMC) algorithms are characterized by deteriorating mixing times upon mesh-refinement, when the finite-dimensional approximations become more accurate.
Maltreated foster children often exhibit alterations in diurnal hypothalamic pituitary adrenal (HPA) axis activity that are characterized by lower cortisol levels upon waking and smaller declines in morning-to-evening cortisol levels.
Pseudomonas genotypes are characterized by extensive genetic heterogeneity acted upon by selective pressures through mobile genetic elements (MGEs) that confer catabolic potential to degrade variety of xenobiotic compounds such as antibiotics, biocides, and heavy metals [ 6].
This problem is evident when comparing the HXT-null above with any of the other strains: for all the other strains genes induced upon glucose addition are characterized by negative PC1 loadings, while for HXT-null induced genes have positive PC1 loadings.
Dust mite allergen levels reported by other studies conducted around the world are characterized by high variability, dependent mostly upon humidity levels, from less than 2 μg/g of dust in very cold or dry climates (e.g., Stockholm, Arizona) to mean levels in the range of 2 15 μg/g in countries with climates more suited to mite reproduction (costal areas of Europe and USA).
Event signatures based upon prediction, extrapolation, and domain discrepancies are characterized and simulated.
