Exc. is the abbreviation for excerpt.
To provide an accurate assessment of the intended aesthetic impact of a specific excerpt, I'd need to see the excerpt itself. Generally, the aesthetic impact can involve evoking emotions, creating vivid imagery, or establishing a mood that resonates with the reader. The choice of language, structure, and themes all contribute to how effectively the excerpt achieves its desired aesthetic effect. Please share the excerpt for a more tailored response.
The abbreviation is ft. Abbreviation for Lineal Feet: Lft
PLH is the abbreviation for prolactin
The abbreviation for millibar is "mb"
The abbreviation for a bushel is "bu."