The phrase "are present in low" is not complete and lacks context, making it difficult to assess its correctness in written English.
It could be used in a context discussing the presence of something in low quantities or levels, but additional information is needed for clarity.
Example: "The nutrients are present in low concentrations in the soil, affecting plant growth."
Alternatives: "are found in low amounts" or "exist in low levels."
But when the worms are present in low levels, she says, they "can be angels too".
The other enzymes are present in low amounts in yeast culture and are difficult to purify.
In tropical waters, variation in sunlight and temperature is slight, nutrients are present in low concentrations, and planktonic assemblages do not undergo large fluctuations in abundance.
This finding shows the importance of the correct formation of the prey's defences, as these fluctuations are especially critical for the persistence of species in higher trophic levels, if they are present in low densities.
Subtractive immunization is a technique proven to facilitate efforts to produce monoclonal antibodies specific for antigens that are present in low abundance in a protein mixture, poorly immunogenic and/or similar in sequence or structure to other proteins.
The results of this work proof that photocatalysis is a promising technology to reduce persistent substances even if they are present in low concentrations or in a complex matrix.
Normally, these peptides are present in low concentrations.
The presence and levels of bacterial indicators do not always correlate with the presence and concentration of viruses, especially when these indicators are present in low concentrations.
Meanwhile, thus far, there have been no breakthroughs in the technology for the detection of unstable metabolites or the metabolites that are present in low concentrations.
The document said: "The findings suggest wildcats are very rare, but are present in low numbers in the western half of the national park - Badenoch and Strathspey, Highland Perthshire and possibly Glenlivet.
First, the protein complexes she studies are large and dynamic, have transient interactions, and are present in low numbers within cells, all of which makes them hard to isolate in sufficient quantity and purity, Sharon says.
