1 Either an acute injury near the nail or anything that causes the nail to be damaged repetitively (such as playing soccer) can also cause an ingrown nail.  If a member of your family has an ingrown toenail, then you are more likely to develop one, too.
The troy ounce (symbol and abbreviation: ozt) is a non-SI unit of mass commonly used to gauge the weight of precious metals. One troy ounce (ozt) = 31.1034768 grams (g) = 1.09714286 ounces (oz) = 480 grains (gr).
One pound (abbreviated as lb.) is equal to 16 ounces. It is hard to overlap or connect the measurements of a fluid ounce (volume) to an ounce (weight). This means that it is not possible to immediately determine the weight of a certain matter only from a given volume, per se.