Gasoline is a mixture of the alkanes and unlike many chemicals, can be stored for long periods and transported without problem. It is only when ignited that it has enough energy to continue reacting. This property makes it difficult for alkanes to be converted into other types of organic molecules.
Recovery from being spayed is usually around 10 days. My kitten was back to her usual self in three days but it took 10 days for the incision to heal enough for the stitches to come out.
Never-- if they're SPAYED!! Cats, if they aren't spayed, come into heat every few weeks for most or all of the year, depending on climate. In warmer climates, such as the southern U.S., they cycle all year round. A female is IN HEAT for a week to 10 days (or even as long as 2 weeks in some cases), then out for a week to 10 days-- repeating the cycle until she's bred or spayed.