| 释义 |
phloro-
before a vowel phlor-, used in Chem., to form names of substances connected with phlorizin, as
phloramine |ˈflɒrəmaɪn| [amine], the amine (C6H7NO2 = C6H5O2·NH2) obtained in thin shining films by the action of ammonia on phloroglucin (Watts Dict. Chem. IV. 488). phloretin |ˈflɔərɪtɪn|, a sweet crystalline substance (C15H14O5) produced by the action of dilute acids on phlorizin; hence phloretic |flɒˈrɛtɪk| a., applied to an acid (C9H10O3) obtained from phloretin by the action of potash; also to ethers (phloretic ethers) in which an organic radical takes the place of 1 atom of hydrogen in phloretic acid (Watts Dict. Chem. IV. 491). Its salts are ˈphloretates. phloroglucinol |flɒrəʊˈgluːsɪnɒl|, † phloroglucin, † phloroglucol |flɒrəʊˈgluːsɪn|, [Gr. γλυκ-ύς sweet + -in1: cf. glucose], a colourless or yellowish crystalline, intensely sweet substance (C6H6O3), obtained from phloretin, and occurring widely distributed in plants; also a derivative of this, as nitrophloroglucin, etc.; hence phloroˈglucic a., phloroˈglucide: see quots. phlorol |ˈflɒrɒl|, a phenol, an oily substance (C8H10O) obtained from salts of phloretic acid, or from creosote. phlorone |ˈflɒrəʊn|, a yellow crystalline substance (C8H8O2), homologous with quinone, obtained by distillation of beech-wood and coal-tar.
1840*Phloretic, *Phloretin [see phlorizin]. 1866–77Watts Dict. Chem. IV. 489 Phloretic acid [is] produced, together with phloroglucin, by the action of caustic potash on phloretin. 1857Miller Elem. Chem. III. 511 Phloridzin, when boiled with weak acids, is decomposed into grape sugar, and a resinous matter termed phloretin. Phloretin crystallizes in microscopic almost insoluble plates.
1881Watts Dict. Chem. VIII. 1572 *Phloroglucic Anhydride, or *Phloroglucide, C12H10O5..is obtained: 1. by the action of heat on phloroglucol.
1866–77Watts Dict. Chem. IV. 495 *Phloroglucin is sweeter than common sugar,..permanent in the air at ordinary temperatures. 1893Syd. Soc. Lex., Phloroglucin..is found widely distributed in nature, mainly in combination as the complex body phloroglucide, but partly also in the free state.
1881Watts Dict. Chem. VIII. 1570 *Phloroglucol, C6H6O3..Phloroglucin. 1895Naturalist 24 A red-brown phlobaphene which fused with potass gives protocatechnic acid and phloroglucol.
1879Jrnl. Chem. Soc. XXXVI. 633 By this synthesis, the aromatic nature of *phloroglucinol is definitely established. 1949E. Chain in H. W. Florey et al. Antibiotics II. xix. 758 They also tested a large number of chemicals for their ability to stimulate the production of penicillin... Among the ineffective substances were sodium azide,..phloroglucinol, naphthol, [etc.]. 1963[see filicic a.].
1872Watts Dict. Chem. VI. 928 *Phlorol or phloryl alcohol.. is one of the constituents of beech-tar creosote. 1873― Fownes' Chem. (ed. 11) 798 Phlorol, an oily liquid obtained by the dry distillation of the barium salt of phloretic or oxethyl⁓benzoic acid. 1881― Dict. Chem. VIII. 1572 Phlorol... This phenol, first noticed as a constituent of beech-tar creosote.
1866–77Ibid. IV. 496 *Phlorone. C8H8O2. 1872Ibid. VI. 928 Phlorone crystallises in golden-yellow oblique rhombic prisms, which when heated give off a pungent odour. |