Definition of diastereomer. : a stereoisomer of a compound having two or more chiral centers that is not a mirror image of another stereoisomer of the same compound â compare enantiomer.
Most perennial weeds such as Johnsongrass. are also suppressed although vigorous plants or heavy in-. festations may lift plastic. Perennial sedges, and to a lesser. extent, grasses can puncture sheet mulches as the weeds. emerge from the soil, resulting in inadequate control.
For the most part there are two types of rubber roofing used in the RV industry: Ethylene Propylene Diene Monomer (EPDM) and Thermal Poly Olefin (TPO). The problem is each type has its own unique characteristics and care and maintenance requirements, but most RV owners donât know which type of rubber roof they have.