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.
Both green and red romaine are packed with a surprisingly broad range of nutrients, and consequently, can offer a whole host of health benefits. Here's a rundown of the most important nutritional benefits of romaine lettuce: Vitamin C for a Healthy Immune System, Skin, Bones, and Teeth. Romaine lettuce is a great source of vitamin C, with one ounce of romaine providing 11% of the Daily Value for this important nutrient. By contrast, an equal amount of iceberg supplies your body with only 1% of the Daily Value for vitamin C.