| 单词 |
orcinol |
| 释义 |
orcinol|ˈɔːsɪnɒl|
[f. orcin + -ol 2.]
A colourless crystalline substance (C7H8O2 + H2O) obtained from the various kinds of orchilla-weed, turning red, brown, or yellow, in contact with air or when treated with various compounds, which gives a purple colour with ribose and is used in estimating nucleic acids.
1880Jrnl. Chem. Soc. XXXVIII. 113 (heading) Resorcinol and orcinol derivatives. 1892Syd. Soc. Lex., Orcinol, a dihydric phenol, present in the lichens used in the preparation of archel and litmus. 1921W. T. K. Braunholtz tr. Moureu's Fund. Princ. Org. Chem. vii. 372 An ammoniacal solution of orcinol undergoes oxidation in the air, giving orceïn,..which is a red dyestuff. 1922Chem. Age VII. 709/1 The various orders of Variolaria.., Rocella and Lecanora all contain orcinol in the free state, and these lichens are now used for the production of the two substitution products, litmus and archil. 1969Phytochem. VIII. 2223 Orcinol (5-methylresorcinol) has been detected for the first time in higher plants, in ten species of the Ericaceae. 1973N. C. Mishra et al. in Niu & Segal Role of Ribonucleic Acid 261 DNA and RNA were determined chemically by diphenylamine and orcinol reactions respectively. |
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