The flow of blood to the arteries of the body is impaired when aortic stenosis exists. Ultimately, this can lead to heart failure. Aortic stenosis occurs three times more commonly in men than women. Picture of heart and valves -- aortic valve stenosis.
Ammonium thiocyanate is colorless lustrous monoclinic flaky or columnar crystal with the chemical formula being NH4SCN and the molecular weight of 76.12. At 92 â, it is rhombohedral crystal with the melting point of 147 â (decompose at 170 â), the relative density of 1.3057 and the refractive index of 1.685.
From Wikipedia, the free encyclopedia. Ammonium aluminium sulfate, also known as ammonium alum or just alum, is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al(SO 4) 2 Â·12H 2 O. It is used in small amounts in a variety of niche applications.The dodecahydrate occurs naturally as the rare mineral tschermigite.rom Wikipedia, the free encyclopedia. Ammonium aluminium sulfate, also known as ammonium alum or just alum, is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al(SO 4) 2 Â·12H 2 O. It is used in small amounts in a variety of niche applications.