| 单词 | photo-sulphate |
| 释义 | > as lemmasphoto-sulphate 3. Prefixed to the names of salts to form the names of compounds formed from them by the action of light, as in photography, as photo-bromide, photo-chloride, photo-iodide, photo-sulphate; similarly photo-salt. Now rare. ΚΠ 1855 Medical Times 24 Mar. 289/1 (heading) Formulæ for photosulphate of iron in erysipelas. 1887 Carey Lea in Amer. Jrnl. Sc. 352 As these substances have been hitherto seen only in the impure form in which they are produced by the continued action of light on the normal salts, it might be convenient to call them photosalts, photochloride, photobromide, and photoiodide, instead of red or coloured chloride, etc. 1890 Internat. Ann. Anthonys Photogr. Bull. 395 Photo~sulphate of iron solution was for a long time the only developer used. 1905 Science 13 Jan. 55/2 The change of color of the silver photochlorides is in accordance with the theorem. 1913 Jrnl. Physical Chem. 17 116 The interesting characteristic of the synthetically prepared silver bromide, of giving reversed pictures on development after an exposure, is apparently not in harmony with the reactions of the photochlorides or with behavior of the photobromides when obtained by exposure to light. 1942 Chem. Rev. 31 197 Sichling..studied the illumination of electrodes made by absorbing photochlorides (silver chloride and amorphous silver) in gelatin. < as lemmas |
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