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.
Rigid panels of insulation. Can be used to insulate almost any part of your home, from the roof down to the foundation. Polystyrene and polyurethane are the most common types of materials used in making foam board. Sheathing reduces heat conduction through structural elements like wood and steel studs.