| 单词 |
macrocyclic |
| 释义 |
macrocyclic, a.|mækrəʊˈsaɪklɪk|
[f. macro- + cyclic a.]
1. Bot. Of a rust fungus: having a long life cycle.
1926Arthur & Kern in Mycologia XVIII. 90 The vegetative body is either long-cycle (macrocyclic), consisting of two unlike and discontinuous generations, or short-cycle (microcyclic), consisting of one continuous generation. Ibid. 91 We are indebted to Dr. G. Lagerheim, of Stockholm, for the suggestion of the terms macrocyclic and microcyclic which seem to us to be very appropriate and satisfactory. 1929[see æcium]. 1950E. A. Bessey Morphol. & Taxon. Fungi xii. 396 Rusts possessing such a cycle are called macrocyclic or long-cycle rusts. 1970J. Webster Introd. Fungi 376 It is also believed that forms with shorter life cycles arose..from macrocyclic ancestors.
2. Chem. Containing or being a ring composed of a relatively large number of atoms.
1947R. L. Wakeman Chem. Commercial Plastics xi. 225 Macrocyclic esters can thus be formed, containing even as many as 16 or more members in the ring. 1960[see Macrolide]. 1964M. Hynes Med. Bacteriol. (ed. 8) x. 137 These substances, as well as erythromycin, have a macrocyclic lactose ring, and are sometimes termed macrolides. 1972Banthorpe & Charlwood in A. A. Newman Chem. Terpenes vii. 377 The macrocyclic compound cembrene..is probably derived from GGPP.
Hence (as a back-formation) ˈmacrocycle, a macrocyclic compound or molecule.
1956Nature 14 Jan. 70/1 Synthesis of azaporphins and related macrocycles. 1971Ibid. 17 Sept. 183/1 Several [antibiotics] have structures made up of two types of chemical entity; for example..the macrolides (macrocycles attached to carbohydrate residues). 1974Chem. Rev. LXXIV. 351/2 Christensen and coworkers have discussed for several classes of macrocycles their unique ion binding properties. |
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单词 macrocyte 释义 macrocyte Path.|mkrsat|[f. macro- + -cyte.]An abnormally large red blo......