Curium is a hard, brittle, radioactive silvery metal. It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. It tarnishes slowly in dry air at room temperature.
Romaine lettuce is a rich source of fiber and has very few calories, only 8 in a one-cup serving. In terms of vitamins, a cup of Romaine lettuce delivers more than 50% of your daily requirement for vitamin A, as well as significant levels of vitamin K and vitamin C.
2 â Calcium. One head of romaine has 206 milligrams (mg) of calcium (about 21% RDA). Blend it with calcium rich fruits like papaya and oranges and youâll get more calcium than a glass of milk! 3 â Omega-3s. One head of romaine lettuce contains 44% RDA of Omega-3 essential fats.