Fig. 1
From: An improved pollen number counting method using a cell counter and mesh columns
Home-made mesh columns. a Left to right: 0.6-mL tube, 0.6-mL tube with cut tip, mesh attached to 0.6-mL tube (column), and polyester meshes (20-μm and 100-μm opening sizes). b–g Column preparation. The bottom of a 0.6-mL sample tube was removed around the 100-μL line using scissors (b and c). The cut surface was heated using a cigarette lighter (d and e). The heated surface was bound with 1 × 1 cm pieces of polyester mesh (f and g). The background squares were 1 × 1 cm