Is the glass half empty or half full? Is the glass half empty or half full? "Is the glass half empty or half full?" is a common expression, a proverbial phrase, generally used rhetorically to indicate that a particular situation could be a cause for optimism (half full) or pessimism (half empty), or as a general litmus test to simply determine an individual's worldview. The purpose of the question is to demonstrate that the situation may be seen in different ways depending on one's point of view and that there may be opportunity in the situation as well as trouble. Another perspective comes from psychology, where research has
Olive oil acidity attacked by flies and parasites), bruised olives, delayed harvesting and storage before processing. The lipolysis reaction is greatly enhanced by the presence of an aqueous phase, so when oil is separated from water during processing, lipolysis slows down and stops. Free acidity is a defect of olive oil that is tasteless and odorless, thus can not be detected by sensory analysis. Since vegetable oils are not aqueous fluids, a pH-meter can not be used for this measure. Various approaches exist that can measure oil acidity with good accuracy. The official technique to measure free acidity in olive oil (as defined