Soda bread pastry flour (made from soft wheat), which has lower levels of gluten than a bread flour. In some recipes, the buttermilk is replaced by live yogurt or even stout. Because the leavening action starts immediately (compared to the time taken for yeast bread to rise), bakers recommend the minimum amount of mixing of the ingredients before baking; the dough should not be kneaded. Various forms of soda bread are popular throughout Ireland. Soda breads are made using wholemeal, white flour, or both. In Ulster, the wholemeal variety is usually known as "wheaten bread" and is normally sweetened, while the term
Sodium bicarbonate Also, baking soda can be used as a multipurpose odor remover. During the Manhattan Project to develop the nuclear bomb in the early 1940s, the chemical toxicity of uranium was an issue. Uranium oxides were found to stick very well to cotton cloth, and did not wash out with soap or laundry detergent. However, the uranium would wash out with a 2% solution of sodium bicarbonate. Clothing can become contaminated with toxic dust of depleted uranium (DU), which is very dense, hence used for counterweights in a civilian context, and in armour-piercing projectiles. DU is not removed by normal laundering;