I think there is a bit confusion about the term emulating USB-ZIP or USB-FDD. 1) For me emulating USB-ZIP means (any device, such as this USB-pendrive) claims to be (real USB-ZIP). Or emulating USB-FDD means (any device, such as this USB-pendrive) claims to be (real USB-FDD). I suspect this real emulating can only be done on hardware / firmware level and is not possible for normal end users. So either you buy a device with this feature or not...
Sourdough is dough which has microorganisms (for example lactobacillus or yeast) from sourdough or sourdough starters, which are active or can be reactivited. With the addition of grain products and water, they are capable of continuous acid generation.
Sourdough is generally considered wild yeast, though the flavor of sourdough is actually from a mixture of yeast and lacto-bacteria. Once a stable culture has been created, the amount of leavening gas is produced roughly equally by the yeasts and bacteria.hen making sourdough for the purposes of acid-base leavening, such as pancakes, a more-acid dough is often desired. A simple way for a baker to achieve that using accurate measurement and formula notation is to use an excessively high starter percentage. Generally, sourdough improves with age.