Organic Chemistry/Carboxylic acids. < Organic Chemistry. A carboxylic acid is characterized by the presence of the carboxyl group -COOH. The chemical reactivity of carboxylic acids is dominated by the very positive carbon, and the resonance stabilization that is possible should the group lose a proton.
The presence of renal tubule cells in the urine is of diagnostic significance, as it points towards an underlying kidney disease. The last type of epithelial cells are squamous cells. These cells are the largest cells seen in urine specimens. These cells are flat, usually with an angular or irregular outline.
Non-keratinized squamous epithelial cells. 1  They are formed in the farthest part of urethra or vagina. 2  They have small nuclei and are larger than transitional cells. 3  They have one or more flat border. 4  They can be formed in any shape but are generally found to be round.