0 a light, usually thin, soft plastic, often used for making bags or for keeping things dry or fresh: --
For dehydration, six or seven equal aliquots of seeds were placed in polythene bags with an equal weight of freshly regenerated silica gel desiccant.
The remaining five pats in each group were placed directly into polythene bags.
The seedlings were incoculated with compatible rhizobia in polythene tubes in a nursery before being delivered to the farms.
Samples were stored in sealed polythene bags and kept in a cold store prior to processing.
Heat losses above the plate were minimized by covering the matrix with chromatography paper, a sheet of black polythene and a triple-glazed lid.
Each sample was placed in a black polythene bag which was then labelled, sealed and transported to the laboratory.
A sheet of clean polythene was placed beneath the cage at the beginning of the day.
The stocking was put in a polythene bag fixed to the trap through a similar tubing, 20 cm long.
