Category: N

The extent of time required after a given protein is ingested before an amount of nitrogen equal to that in the protein has been excreted.  

Condition during which nitrogen excreted in the urine, feces, and sweat equals the amount taken in by the body in food.  

A test of the ability of leukocytes to reduce nitroblue tetrazolium from a colorless state to a deep blue. It is used as a marker of nitric oxide synthase. The reduction of NBT may be used in the rapid diagnosis of urinary tract infections and in the study and diagnosis of chronic granulomatous disease and…

A toxic derivative of benzene used especially in making aniline.  

An organic compound in which trivalent nitrogen is attached to a carbon atom. It is used to make latex-free gloves for use in health care.  

A binary compound formed by direct combination of nitrogen with another element (e.g., lithium nitride [Li3N], formed from nitrogen and lithium).  

A chemical indicator used to determine pH, especially of vaginal secretions. It is often used in gynecological and obstetrical evaluations, e.g., to determine whether a pregnant woman has premature rupture of membranes with leaking amniotic fluid in the vaginal vault.  

Nerve cell degeneration after division of the axon.  

A large granular body found in nerve cells. They can be demonstrated by selective staining. They are rough endoplasmic reticulum (with ribosomes) and are the site of protein synthesis. Nissl bodies show changes under various physiological conditions, and in pathological conditions they may dissolve and disappear (chromatolysis).  

An antibiotic that is active against gram-positive bacteria; it is used primarily as a food preservative.