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The myelin sheath is a layer of insulating, fatty material that encases some neurones. The sheath is composed of Schwann cells that have gaps called nodes of Ranvier between them. Potassium and sodium ...

Tonality describes what key a piece is in or what tonal relationships are used. When asked to talk about tonality you should discuss whether the key is major or minor and the different modulations used...

There are four methods of enzyme immobilisation: adsorption, covalent bonding, entrapment and membrane separation.

Adsorption involves mixing the enyzme with an immobilsing support so the...