The phrase "a plant material" is not correct in standard written English.
It should be "plant material" without the article "a" as it refers to a non-count noun.
Example: "The researchers collected plant material from various locations for their study."
Alternatives: "plant substance" or "vegetative material".
Left behind was cellulose, a plant material known to be compatible with mammal tissue, as well as the intact leaf veins.
As a plant material, artemisinin cannot be patented, said Dr. Allan Schapira, a policy specialist for the Roll Back Malaria campaign of the World Health Organization.
Batches of St John's Wort tablets manufactured for Superdrug and Asda have been recalled due to high levels of a plant material that can cause liver damage.
A laboratory-scale hybrid-denitrification filter (HDF) was designed by combining a plant material digester and a denitrification filter into a single unit for the removal of nitrate and phosphorus from glasshouse hydroponic wastewater.
To make the new battery, the researchers dissolved cellulose, a plant material used to make paper, in a liquid salt solution.
To this, the Dutch added turnsole, a plant material that imparted a reddish tint and also had properties that prevented pests.
Seeds of bottlebrush, a novel plant material, were found to exhibit excellent adsorption capacity over a wide range of Cd II) concentration.
Those wholesalers liquefy the powder in acetone or alcohol, apply the liquid to a smokable plant material and package the mix in metallic pouches.
Synthetic cannabis is artificial chemicals sprayed on to a dried plant material, and despite being illegal in Massachusetts, it's frequently available at gas stations and mom-and-pop stores, usually marked as incense or pot pourri.
This procedure is useful for choosing a suitable plant material in metal ion reduction instead of random selection.
The relative importance of these anatomical and physiological variations within a given plant material is not well understand (Le Roux et al. 1999).
