The phrase "are characterized at the" is not correct in standard written English.
It seems to be a fragment and lacks clarity without additional context.
Example: "The species are characterized at the molecular level by their unique DNA sequences."
Alternatives: "are defined by" or "are described in terms of".
The redox behaviours of 12-molybdophosphoric acid (12-MPA) and 12-molybdosilicic acid (12-MSA) in aqueous acid media are characterized at the carbon fiber (CF) microelectrode.
The geomagnetic variations are characterized at the Canadian Space Weather Forecast Centre by the hourly range of magnetic field for northward, eastward and vertical downward directions.
Also the analysis of three individual pulsation events, occurring at different times during the day, is shown; they are characterized at the two stations by simultaneous, coherent fluctuations, whose phase difference finds correspondence with the statistical behaviour.
Using 7 years of data collected on 82 large plots in a grassland biodiversity experiment (the Jena Experiment) [15], [16], we tested to what degree higher species richness of plant communities translates into temporal stability when functions are characterized at the organizational level of the population, the functional and phylogenetic group, the community, or the ecosystem (Table 1).
Among the identified AtCYPs, only 15 are characterized at the molecular level [ 11, 13– 213.
TSE are characterized at the pathological level by abnormal accumulation of misfolding prion protein (PrPsc) affecting the central nervous system (CNS) [ 1, 2].
For confirmation of the initial antigenic characterization and information about the VP4 (P) genotype, strain PA260/97 was characterized at the molecular level.
However, the genome duplication of P. ginseng has not been characterized at the sequence level.
Alzheimer's disease, a neurodegenerative pathology, is characterized at the beginning by episodic memory deficit.
However, with the appearance of natural fractures, a "hump" could be characterized at the transition flow regime between bi-linear flow and formation linear flow.
Furthermore, the heterogeneity at each glycosylation site was characterized at the reduced antibody level and at the isolated glycopeptide level.
