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.
Cyclohexane is nonpolar and hydrophobic. Therefore, this is used as a nonpolar solvent in the chemistry laboratory. Cyclohexane is considered to be the most stable cycloalkane of all because, its total ring strain is minimum. Therefore, it produces the least amount of heat when burning compared to other cycloalkanes.