The phrase "a fast increase" is correct and usable in written English.
It can be used to describe a rapid growth or rise in a particular context, such as statistics, sales, or any measurable quantity.
Example: "The company experienced a fast increase in sales after launching their new product."
Alternatives: "a rapid increase" or "a swift rise".
The results show a fast increase of the hardness after annealing.
This was confirmed by a fast increase in measured force (see Fig. 1c) and often halting of the gliding microtubule.
It was found that the removal process of metal ions involved a fast increase stage followed by a slower stage.
In Regime II, a fast increase of birefringence accompanies formation of crystalline structure with establishment of long-range connected network.
It has been shown that tanycytes respond with a fast increase in [Ca2+]i to ATP, glucose8, 9, histamine, acetylcholine8, and sweeteners10.
We observed a fast increase of belowground respiration with the onset of photosynthesis, which we assume is induced by pressure concentration waves travelling through the phloem.
Stimulation of HeLa cells stably expressing NIR PKA biosensor with 1 mM dibutyryl cyclic adenosine monophosphate (dbcAMP) led to a fast increase in the FRET/miRFP670nano fluorescence ratio, which reached ~33% in 1 h.
The performance of the modified electrodes toward urea hydrolysis was investigated via amperometric measurements, revealing a fast increase in cathodic current with a well-defined peak upon addition of urea to the electrolytic solution.
The performance of the modified electrodes toward acetylthiocholine hydrolysis was investigated via cyclic voltammetry and chronoamperometric measurements, revealing a fast increase in anodic current with a well-defined peak upon addition of acetylthiocholine iodide to the electrolytic solution.
The explosive vaporization of a liquid above planar microheaters induces a fast increase of pressure that is exploited in many thermally driven actuators in MEMS components such as ink jet printer cartridges, pumps, valves and optical switches.
The sample immersed in Na2SO4 solution of high concentration had a larger stress, a low strain, a fast increase rate in the mechanical properties and a short time to reach the ultimate mechanical properties at initial stage.
