We are reporting a rare chronic irritating, incapacitating condition that was controlled by low-dose radiation treatment in the case here presented. A 58 year-o ld woman had a 21⁄2-year history of painful orofacial g ranulomatosis was referred to our practice after many different treatment options failed control the disease. Presenting severe difficulty of swallowing, discomfort, labial swellin...

Arginine is a semi-essential amino acid that plays a critical role in several metabolic pathways. The best known of these is as the immediate precursor of urea in the liver and to a lesser extent in the intestine.1 The enzyme responsible for the cleavage of arginine to produce urea is arginase, which is the only enzyme in the urea cycle that comes in two forms, arginase I, a cytosolic enzyme, a...

An (m,m,m)-array of order n is an n×n array such that each cell is assigned a set of at most m symbols from {1, . . . , n} such that no symbol occurs more than m times in any row or column. An (m,m,m)-array is called avoidable if there exists a Latin square such that no cell in the Latin square contains a symbol that also belongs to the set assigned to the corresponding cell in the array. We sh...

W is the most precious and essential natural resource. If unadulterated and at room temperature, it is tasteless, odorless (to humans), and transparent. Water sustains life, reshapes topography, provides passage and conveyance, and delineates and destroys geopolitical boundaries. Water comprises ≈71% of Earth’s surface, and the United States Geological Survey estimates that Earth is covered by ...

the Ottawa Hospital has introduced a dress code that will require staff to wear uniforms prescribed by their respective departments and functions. The Ontario-based hospital may be the first to issue a formal, publicized dress code in the country. Put into effect in March, the code requires staff to don their scrubs and lab coats whenever they enter the hospital, and take them off when they lea...