If you look at the stem of an artichoke you will see a ring, with tough green bark (for want of a better term) surrounding a paler green heart.The bark is not good to eat, and you should remove it with a paring knife, leaving the heart of the stem, which is good to eat.ere we were going to need sliced artichokes, and trimmed the stem of the artichoke leaving about an inch (2.5 cm) below the petals.
Si is the short form for Silicon and silicon is not a metal. Si is the short form for Silicon and silicon is not a metal.
The material we call steel is in fact an alloy, a mixture of different metals. The element iron (symbol Fe) makes up a large percentage of all steels, generally composing more than 75 percent of the mix by percent of total mass.ilicon (Electrical) Steel. This steel is used in motors and generators and has a composition of about 0.6 to 5 percent silicon (Si), with one specific steel made of 0.4 percent carbon, 2 percent silicon, and 97.6 percent iron.