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.
Notice that the anti staggered isomer (A and G) has the lowest energy, whereas the totally. eclipsed isomer (D) has the highest energy. Cycloalkanes can be either fairly stable compounds, or fairly unstableâdepending on ring strain. Ring strain arises from three factors: angle strain, torsional strain, and nonbonded strain (sometimes. referred to as steric strain). Angle strain results when bond angles deviate from their ideal values by.