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.
1.1 Sourdough: microbiology and the process 1.1.1 Microflora of sourdough Sourdough is a process in which flour and water (and other ingredients) are fermented with microbes originating from preceding sourdough, commercial starter culture, bakery equipment or from flour.ran sourdough was introduced as a potential tool for the future development of technologically and nutritionally superior raw materials for all cereal foods, such as bread, breakfast and snack products. Katina, Kati. Sourdough: a tool for the improved flavour, texture and shelf-life of wheat bread.