| 释义 |
ˌsuperconˈtraction
[super- 13.]
The contraction of a hair or fibre to less than its original length after treatment with heat or chemicals.
1933Astbury & Woods in Phil. Trans. R. Soc. A. CCXXXII. 337 The appearance of the phenomenon of ‘super-contraction’ just described is perhaps the most striking manifestation of this change. Ibid. 359 A general effect to which we have ventured to attach the term ‘super-contraction’, to distinguish it from the property of a normal stretched hair, when wetted, of returning exactly to its original unstretched length. 1954Alexander & Hudson Wool iii. 75 Supercontraction of unstrained fibres was first observed by Speakman. 1977F. Kidd in R. S. Asquith Chem. Natural Protein Fibers ix. 394 Woods..recorded 50% supercontraction of Cotswold wool.
So ˌsuperconˈtract v. intr. and trans., to (cause to) undergo supercontraction; ˌsuperconˈtracted, -conˈtracting ppl. adjs.
1933Phil. Trans. R. Soc. A. CCXXXII. 365 With respect to the minimum (super-contracted) length,..permanent set develops even in hot water. 1953R. W. Moncrieff Wool Shrinkage xxv. 352 Fibres..which had not been treated with diepoxybutane in the phosphate buffer did not subsequently supercontract in metabisulphite. 1954Alexander & Hudson Wool iii. 76 Phenol is a much more effective supercontracting agent than formamide. 1962W. J. Onions Wool ii. 38 Steam set fibres are also resistant to boiling 5 per cent sodium bisulphite, which supercontracts untreated fibres. 1977F. Kidd in R. S. Asquith Chem. Natural Protein Fibers ix. 394 White skunk hairs..supercontract more in sodium metabisulfite than do human hairs. |