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.
Squamous cell carcinomas, also known as epidermoid carcinoma are a number of different types of cancer that result from squamous cells.[1] These cells form the surface of the skin lining of hollow organs in the body and line the respiratory and digestive tracts.[1]