The phrase "appreciable part of" is correct and usable in written English.
It can be used to indicate a significant or noticeable portion of something, often in discussions about quantities or contributions.
Example: "An appreciable part of the budget was allocated to research and development."
Alternatives: "significant portion of" or "notable part of".
"If crowdfunding does become an appreciable part of the mix down the road then we might see more scientists deliberately thinking up projects that would have a direct public appeal," he said.
"I do feel that this would be very worth doing," Lord wrote, "because the piece is one of Alberto's most beautiful, and it would be a pity to have it lost forever when a very appreciable part of its original condition could be preserved".
An appreciable part of Afghānī's activities took place in areas where Sunnism (the other major division of Islam) was predominant, and it was probably to hide his Persian and Shīʿite origin, which would have aroused suspicion among Sunnis, that he adopted the name Afghānī.
"Will the discontented peoples of Europe be willing for a generation to come so to order their lives that an appreciable part of their daily produce may be available to meet a foreign payment?" he asked in The Economic Consequences of the Peace.
When trpA::kan and wild-type strains compete in the presence of amikacin, however, the trpA::kan strain remains an appreciable part of the population (Figure 2).
These results argue that an appreciable part of the effect of DDVP is on energy metabolism and is regulated at the message level.
Floodplains elevated only a few feet above river level, abandoned river channels, and oxbows may have standing or sluggishly flowing water for appreciable parts of the year and thus support swamps and marshes.
Both countries maintain highly reliable registers and an appreciable portion of homicide offenders go through a forensic psychiatric examination as part of the trial procedure.
Mr. Glotzbach readily admitted that Google Apps did not account for "an appreciable percentage" of the business software market.
As described by Hamada et al. [ 10 ], a high proportion of parenchymatous cells is appreciable in the ventral part of the traumatic xylem.
Consequently we believe future schemes must have realistic time scales, must not involve appreciable administrative burden if part of routine clinical care unless addressed, and must take cognisance of any likely changes in care during their lifetime, i.e. standard drugs losing their patent and/or clinical standards changing.
