The phrase "a substantial drop of" is correct and usable in written English.
It can be used when discussing a significant decrease in quantity, value, or performance in various contexts, such as finance, statistics, or general observations.
Example: "The company reported a substantial drop of 20% in sales compared to the previous quarter."
Alternatives: "a significant decrease in" or "a considerable decline in".
Halide binding forms a specific nonfluorescent complex generating a substantial drop of the fluorescence via static quenching.
In such a structure, according to the X-ray analysis, a substantial drop of residual stresses is achieved as compared to the one-time reduced material.
Their diversification may thus have been induced by the same environmental factor, most likely by a substantial drop of the lake level during a period of aridification in eastern Africa about 2.5 to 3 million years ago [ 13].
Even allowing for a substantial drop out of 30%, there is still an 83% power to detect a true effect size of 6 mm Hg.
A substantial drop to a level of, say, $1.10 by the end of 2011 isn't impossible.
5 Further investigation found that many stillborn fetuses had failed to reach their growth potential, 6 7 8 and inclusion of fetal growth restriction as a category in stillbirth classifications resulted in a substantial drop to around 15% in the proportion of cases considered unexplained.
Our results demonstrate that, regardless of the similarity reduction method employed, a substantial drop in performance of classifiers is observed compared to their reported performance on benchmark datasets of unique peptide sequences.
Temporal gene expression revealed a substantial drop in expression of most selected genes from ZEA-induced library after 6 hours of exposure whereas 3 of 5 selected genes from DON-induced library were increased in expression at 72 hours.
Even when reducing the generation interval by 50%%, the much lower rate of inbreeding per generation that resulted from GS because of the lower within-family correlations of EBV, allowed a substantial drop in the number of parents selected with GS for the same rate of inbreeding per year.
During 72 hours of storage, there was a substantial drop in moisture content of OPF petiole, juice yield, and total sugars recovery.
That's why the current White House proposal to cap the value of the charitable deduction would, as the American Enterprise Institute's Arthur Brooks has found, likely lead to a substantial drop in overall giving a drop of up to $9.4 billion.
