1 Yellow media without gas pocket-sugar utilization with production of acid only. 2  Red media (no change in media) -no change and no sugar utilization. 3  Pink media especially at the top, ignore gas-no sugar utilization with degradation of protein resulting in alkaline end products (this may be difficult to see).
With organic solvents with long alkane chain, such as n-hexadecane and n-decane, the water droplets become much larger and the microemulsion is unstable. In this case, solvent polarity may have become a determining factor and the long alkane chain was too hydrophobic to form a stable microemulsion with water.
n-Hexane has chemical properties that provide ideal functionality as a solvent for extraction of vegetable oils. n-Hexane is a compound of specific molecular structure chosen for use as a pure (0.5 to 5.0% hexane isomers and other impurities) solvent or reagent in laboratory research settings.wanson Regents Professor and Interim Director Hexane extraction in soyfood processing The selection of hexane as the solvent of choice for extraction of oils, other nonpolar constituents of plant foods, or removal of undesirable constituents from plant foods is one of the most common practices in the food industry.