Chitin

To confirm the chitin identity, Matthews used different techniques such as circular dichroism and Fourier-transform infrared spectroscopy — a process to definitively identify compounds — to match the molecular fingerprint to commercial chitin from shrimp.

Chemically, chitin is closely related to chitosan (a more water-soluble derivative of chitin).

The Vestimentiferan tubeworms build the external chitin structure themselves by secreting chitin from specialized glands located in their body walls.

Chitin is found in mushrooms, shellfish and insects.

As crustaceans, both groups are covered in a hard exoskeleton or carapace made of chitin.

Powered by photosynthesis, cyanobacteria can absorb sunlight, nutrients, and carbon dioxide and create calcium carbonate or chitin, the compound most commonly found in seashells and concrete.

To give you the nuts-and-bolts on the chitin extracting process, here’s how a team of crafty students at the Royal College of Art and Imperial College London developed a process of turning lobster shells into single-use plastics.

Cuantec, which has sites in Motherwell and Dunstaffnage, near Oban, says its method for extracting chitin uses less harmful chemicals.

The company's Dr Cait Murray-Green said: "To put it bluntly we take the bits of scampi you don't want to eat and we ferment that in order to extract a natural biopolymer, chitin.

A flexible material made from multiple layers of chitin from crab shells and cellulose from trees could one day replace plastic packaging film.

The exoskeleton of crabs contains chitin, one of the most abundant biodegradable materials in the world.

Chitin has a similar structure, but has nitrogen -containing side branches, increasing its strength.

Fungal cell walls Chemical structure of a unit from a chitin polymer chain.

Like the trunk portion of the body, the roots of the Vestimentiferan tubeworms are composed of chitin crystallites, which support and protect the tubeworm from predation and environmental stresses.

Polysaccharides serve for the storage of energy (e.g. starch and glycogen ) and as structural components (e.g. cellulose in plants and chitin in arthropods).

The claws are made of sclerotised α-chitin, reinforced with phenols and chinons, and have a uniform composition – except that there is a higher concentration of calcium towards the tip, presumably affording greater strength.

These larvae have triangular shells of chitin, with one corner at the top and the base open, forming a hood round the downward-facing mouth.

They inhabit tubular structures composed of chitin and fixed to the bottom.