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.
There are two main types of corrugated plastic. Corrugated plastic sheet usually comprises what appear to be three layers-two flat sheets with a ribbed center layer.In fact, they are really two layers, often referred to as twinwall plastic.orrugated plastic sheet usually comprises what appear to be three layers-two flat sheets with a ribbed center layer.