The Keychain consolidates various passwords and passphrases in one place and makes them accessible through a master password or passphrase. When an application (including the Finder) needs to access a password stored in the Keychain, the application asks you to unlock the Keychain if it's not already open.
Nutritional Summary: There are 345 calories in a 100g serving of Tesco Plain Flour. Calorie Breakdown: 3% fat, 84% carbs, 12% prot.
According to the U.S. Department of Agriculture, a glazed doughnut contains about 240 calories and 120 of those calories are from fat. A medium-size frosted cake doughnut has 251 calories, but if the doughnut is large, it can contain 327 calories. A small frosted cake doughnut contains 171 calories.