3Si Security Systems, Inc.

Forecast Technology Limited

Trace Tag International Limited

Robert Sleat

John Edward Minton

Greg Van Lint

The invention provides a composition which comprises an apolar medium and a tracer compound, which tracer compound comprises a hydrophobic group and an oligonucleotide. Various uses of the tracer compound are also described.

Oil tagging

A marking apparatus () for marking an item (). The apparatus comprises: means to receive the item; a nucleic acid marker; means to release a marking fluid (); and a distribution mechanism () coupled to the nucleic acid marker and the means to release the marking fluid. The means to release the marking fluid can be activated to release the marking fluid such that the distribution mechanism disperses a mixture of the nucleic acid marker and the marking fluid onto the item.

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Cardiff, United Kingdom

Robert Sleat