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.
Main features: 1  highly transparent. 2  crack-, curl-, break-, scratch- and yellow-resistant. 3  non-smelling and dirt-resistant. 4  free from toxic chemicals, totally recyclable. 5  suitable for underfloor heating. 6  approx. 7  not as many UK manufacturers as PVC chair mats.