utenzi

The title of this post is actually referring to my post yesterday. If you put yeast in a mild sugar solution, say grape juice, they'll use that sugar to create their waste product, ethanol. You see, many organisms that live in liquids have evolved with the assumption that their wastes will dilute out to the point where they won't hurt them. Yeast and ethanol is one example, certain types of bacteria and acetic acid is another example. In the "wild" these organisms have no difficulty doing their thing--but pesky humans enclose the yeast or bacteria in limited spaces and those waste products build up. We do this because we don't have any interest in the bacteria or yeast--it's the waste products that we really want. Sounds kinda gross, huh? Wine and vinegar are created when the microorganisms create so much waste that they kill themselves--at which point humans bottle the resulting liquids and then sell them. Now you might see how I'm making an analogy here ...