Many cuts of beef now meet the USDA's regulations to qualify as lean or extra lean. 1  Of these, the following are considered extra lean: 2  Eye of round roast and steak. 3  Sirloin tip side steak. 4  Top round roast and steak. 5  Bottom round roast and steak. 6  Top sirloin steak.
Some varieties of Limestone are more porous than others. In general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining.Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.n general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining. Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.
Limestone has numerous uses: as a building material, as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, and as a chemical feedstock. Glass making, in some circumstances, uses limestone. 2  It is added to toothpaste, paper, plastics, paint, tiles, and other materials as both white pigment and a cheap filler. 3  It can suppress methane explosions in underground coal mines. 4  Purified, it is added to bread and cereals as a source of calcium.