Normal blood levels of potassium are critical for maintaining normal heart electrical rhythm. Both low blood potassium levels (hypokalemia) and high blood potassium levels (hyperkalemia) can lead to abnormal heart rhythms. The most important clinical effect of hyperkalemia is related to electrical rhythm of the heart.
The troy ounce (oz t) is a unit of imperial measure, now commonly used to measure the mass (weight, in common parlance) of precious metals. One troy ounce is defined as exactly 31.1034768 g (1.097142857143 oz.), which may be used to denote the value of a precious metal. One troy ounce of gold is denoted with the ISO 4217 currency code XAU, while one troy ounce of silver is denoted as XAG. The troy ounce is about 10% heavier (ratio 192/175) than the avoirdupois ounce, used for everyday purposes in the United States.
Silver is a whitish precious metal and has been used since about 4000 BC for various purposes such as money, silverware, jewelry and so on. Silver is measured in troy ounces. A troy ounce is 31.10348 grams. A troy ounce is about 10 percent more than the avoirdupois ounce.