Converse of object

• call: The chemical reacts with the water to produce a fluffy white mass called floc.

• produce: The floc produced in the bottom zone of the hopper forms a suspended mass of sludge called a ' sludge blanket ' .

Adjective modifier

• bacterial: The media in the filter gradually becomes blocked with solids and bacterial floc, eventually forming clumps of bound up media.

Modifies a noun

• tank: Now the UKAEA has asked for permission to empty one of the floc tanks.

• waste: Regulators are concerned at the safety of one of the floc waste tanks and want it emptied as soon as possible.

• size: This is shown to be due to a floc size distribution which is dependent on concentration.