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.
Answer by Rashi Goyal. Confidence votes 5. the solubility of the hydrocarbons decrease because as the number of carbons increase the electron density of the electronegative element i.e.oxygen increase and the polarity of o-H bond decrease.Thus the capability of hydrocarbon to form hydrogen bond decrease and its solubility decrease.nswer by Rashi Goyal. Confidence votes 5. the solubility of the hydrocarbons decrease because as the number of carbons increase the electron density of the electronegative element i.e.oxygen increase and the polarity of o-H bond decrease.