| 单词 | hyperchromic effect |
| 释义 | > as lemmashyperchromic effect 2. Characterized by or exhibiting an increase in the extent to which light (usually, ultra-violet radiation) is absorbed; chiefly in hyperchromic effect. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [adjective] > ultraviolet > relating to ultraviolet radiation > absorption hyperchromic1939 hypochromic1946 1939 W. R. Brode Chem. Spectrosc. vii. 128 Ethylene..has an absorption band at 1545 f (1950 A) in the extreme ultraviolet, but the conjugated coupling of two or more ethylene radicals together results in both hyperchromic and bathochromic effects. 1955 G. Schmidt in Chargaff & Davidson Nucleic Acids I. xv. 569 The quantitative degradation of PNA to mononucleotides by alkali is accompanied by an increase of approximately 20% in the absorption at 260 mμ (hyperchromic effect). 1958 Nature 29 Nov. 1503/2 The hyperchromic degradation of polymers. 1968 M. W. Strickberger Genetics v. 73 The double-stranded form [of DNA] is called hypochromic, and the loose, single-stranded form is called hyperchromic. < as lemmas |
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