Complex sentence: A 1.5-year exposure to Mars-like surface UV radiation conditions in space resulted in complete degradation of the organic compounds, with half-lives between 50 and 150 h for Martian surface conditions.
Split into simpler sentences: A 1.5-year exposure to Mars-like surface UV radiation conditions in space resulted in complete degradation of the organic compounds. Half lives between 50 and 150 h for Martian surface conditions.