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.
Thanks to its durable nature and sturdy âcrunch,â romaine lettuce adds not only nutrients to your salads, sandwiches, or other recipes, but also variety in terms of texture and flavor. Itâs one of the best loved lettuces for having a mild, non-bitter taste that deters some people from consuming leafy greens regularly.