| 释义 |
non-ˈpolar, a.
[non- 3.]
Not polar; spec. in Chem. and Physics, (composed of molecules) having no electric dipole moment.
1892Electrician 29 Jan. 329/1 He [sc. G. Forbes] had carried out some encouraging experiments with a dynamo..built on his ‘non-polar’ principle. 1896Fisher & Schwatt tr. H. Durège's Elem. Theory Functions vii. 126 A non-polar discontinuity. 1913Jrnl. Amer. Chem. Soc. XXXV. 1443 Polar and non-polar bonds may..appear in the same formula. Ibid., There are two distict types of union between atoms: polar, in which an electron has passed from one atom to the other, and non-polar, in which there is no motion of an electron. Ibid., Characteristics of the non-polar type [of substance] are the ability to form chain compounds, and the existence of separable isomers. 1951New Biol. X. 124 Water molecules, being polar, that is, with electric charges not distributed uniformly, are attracted by other polar molecules or parts of molecules but have no affinity for non-polar groups. 1965Phillips & Williams Inorg. Chem. I. iv. 135 Polar molecules will have higher..boiling points than otherwise similar non-polar molecules. 1967E. Chambers Photolitho-Offset i. 8 Lithographic etches produce non-polar deposits not capable of absorbing an acid. |