| nitroglycerin |
A drug that has an amazing capacity to dilate all blood vessels, particularly the coronary arterial vessels, and accordingly, relieve chest discomfort due to coronary artery disease. Nitroglycerin can be administered sublingually (under the tongue), orally (in pill form), or intravenously. Sublingual nitroglycerin usually relieves an attack of angina pectoris within minutes. Interestingly, it can relieve esophageal discomfort promptly as well, due to its potent generalized dilating capacity.
출처: www.barnesjewish.org/groups/default.asp
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| nitrogen |
Nitrogen is a very common gas -- so common, in fact, that it composes almost 4/5 of our atmosphere. Nitrogen forms covalent bonds as well as hydrogen bonds, and has valences of -3, -5, +4, and +2. Nitrogen is element #7, and N's atomic mass is 14.0067. At STP, N has a density of 1.251 g/L. N melts at 63.15 K and boils at 77.344 K. It is a highly electronegative element, with an electronegativity of 3.04.
출처: www.wro.org/ras/glossary/n-r.htm
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| nitrogen cycle |
The formal name for the biological cycle in which toxins are broken down into less harmful products by Aerobic bacteria.
출처: www.kingvinnie.com/aquaria/glossary/
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| nitrous oxide |
"Laughing gas" can sometimes be used for painful procedures. It is available in pre- mixed canisters or can be given by means of an anaesthesia machine.
출처: pediatric-pain.ca/mclp/mclpm-te.html
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| nitrocellulose |
a pulpy or cotton-like polymer derived from cellulose treated with sulfuric and nitric acids, and used in the manufacture of explosives, plastics, and solid monopropellants; nitrocellulose lacquer is the common, traditional finish used on guitars, as opposed to the UV-curable finish developed by Taylor.
출처: www.taylorguitars.com/guitars/reference/glossary.h...
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