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.
Clear sheet pvc. 1  Embossed vinyl: These are your faux snakeskin, reptile print, leather-like fabrics that seek to imitate the natural skins of reptiles. 2  Fashion Vinyl: The super slick, super shiny corsets and other unmentionables that you come across on those websites of questionable repute are made from fashion vinyl.