unoxidised

The top of each inhabited mound is littered with a thick spaghetti of black, unoxidised mud.

Country diary: Holme Dunes, Norfolk 2011

Since the liquids in all living matter presumably contain some dissolved oxygen, the problem is to account for the fact that the tannin in the unfermented bean remains unoxidised, whilst that in the fermented bean is easily oxidised.

Cocoa and Chocolate Their History from Plantation to Consumer Arthur William Knapp

Gerdes 'failure to obtain an explosive compound in any circumstances may very possibly be explained by the entire absence of any oxygen from his cylinders and gases, so that any copper carbide produced remained unoxidised.

Acetylene, the Principles of Its Generation and Use W. J. Atkinson Butterfield

Those used by the Allies were lumps of pure Carolinum, painted on the outside with unoxidised cydonator inducive enclosed hermetically in a case of membranium.

The World Set Free Herbert George 1914

More than 5 grams of nitre must not be used in an assay; and, since the requisite amount of nitre considerably exceeds that sufficient to oxidise the sulphur, not more than 0.5 gram of unoxidised sulphur should be present in the portion of the sample weighed up for determination.

A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886

~ -- The ignition should have been performed in an oxidising atmosphere in a muffle or over a slanting blowpipe flame; this will ensure the oxidation of any pyrites or other sulphide present, which if unoxidised would injure the crucible in the next operation.

A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886

The unassimilated nitrogen of the food, along with the unburned or unoxidised carbon, is expelled in the urine or in the solid excrements.

Familiar Letters on Chemistry Justus Freiherr von Liebig 1838