The phrase "are present during the" is correct and usable in written English.
It can be used to indicate that something exists or occurs at the same time as another event or situation.
Example: "The researchers found that certain species of birds are present during the migration season."
Alternatives: "are available throughout the" or "exist at the time of the".
The drawback of this method is that some remaining components of the fermentation media are present during the reaction.
Stable multimeric complexes are formed when LEDGINs (blue circles) are present during the production of new virus.
The results revealed that micelles are present during the entire lipolysis process.
More complicated diagrams will be displayed to illustrate the structures of the three types of pigments that are present during the aging of leaves: chlorophylls, carotenoids, and anthocyanins.
The assay demonstrates that the expected 72-nt RNA product appears only when the synthetic target, T4 ligase, and both probe fragments are present during the ligation step.
Platelet-rich plasma (PRP) has been found to contain a high concentration of growth factors that are present during the process of healing.
It was concluded that the supported components are present during the oxygen turnover in a molten state, in which all chemical and mass-transfer processes are accelerated.
The 2 – 10 Hz QPOs are present during the quiescent phase and disappear during the burst phase of all types of these X-ray bursts.
For the simulation studies at the Planetary and Space Simulation Facilities (PSI) at DLR, Cologne, Germany, conditions that are present during the southern summer at latitude of 60° on Mars were applied.
When particles are present during the nucleation of the grains, most particles are located at grain boundaries and the final mean grain radius ¯¯¯Rlim is predicted by R¯lim= 1.28r/fa0.50, with r the radius and fa the area fraction of the particles.
