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 cancer (SCC), also called squamous cell carcinoma or nonmelanoma skin cancer, is a type of skin cancer that begins in the squamous cells of the epidermis. This cancer is caused by mutations in the DNA of these cells, which cause them to multiply uncontrollably.