单词 | ionophore |
释义 | ionophoren. 1. Medicine. A device producing an electrical current for use in iontophoresis. Now disused. ΚΠ 1939 Jrnl. Amer. Med. Assoc. 30 Dec. 2417/2 The Burdick Ionophore generates galvanic current designed for use in iontophoresis. 1945 Arch. Dermatol. & Syphilol. 52 98/1 An Ionophore Unit was provided for these experiments by the Burdick Corporation, of Wisconsin. 2. Chemistry. A crystalline substance in which only ions are present in the crystal lattice. ΘΚΠ the world > matter > chemistry > organic chemistry > crystalline substances > [noun] > others amygdalin1651 asparagine1813 ambrein1820 aloin1828 orcin1833 anemonin1838 guaranin1838 helenin1838 puteanic acid1838 styracin1838 alloxanic acid1839 roccelline1840 sinapisine1840 lilacine1842 syringin1843 orsellic acid1848 roccellinin1848 rhamnetin1858 sapogenin1862 frangulin1864 phycite1864 fisetin1865 nucin1866 phlorone1866 piperonal1869 apiol1872 stercorin1873 juglone1878 orcinol1880 kinoin1881 ursone1885 iridin1894 saponarin1902 sambunigrin1905 lepton1921 leuco-taxin1937 lotaustralin1938 ionophore1955 1955 R. M. Fuoss in Jrnl. Chem. Educ. 32 527/1 Conventional nomenclature thus forces us into the awkward position of asserting that sodium chloride is a strong electrolyte in water and a weak one in ammonia... It is therefore suggested that sodium chloride be called an ionophore, defined as a substance in which ions and only ions are present in the crystal lattice. 1963 Jrnl. Chem. & Engin. Data 8 179/1 It is not necessary to employ Fuoss' procedure, based on the Onsager–Fuoss conductance equation.., for an ionophore as highly associated as is NaBr in liquid SO2 at 0° C. 1993 E. V. Dehmlow & S. S. Dehmlow Phase Transfer Catalysis (ed. 3) i. 4 Ionophores, which are molecules made up of ions in the crystal lattice, dissociate (or partly dissociate) into solvated cations and anions in solvents of high dielectric constant. 3. Biochemistry. Any of a diverse group of substances, natural and synthetic, that increase the permeability of a biological membrane to one or more types of ion.Certain ionophores are used as antibiotics and growth promoters in livestock. ΘΚΠ the world > life > biology > biological processes > movement > [noun] > of ions or protons > agent carrier1936 ionophore1967 1967 B. C. Pressman et al. in Proc. National Acad. Sci. U.S.A. 58 1954 Both the valinomycin and the nigericin classes of antibiotics induce alkali ion permeability in mitochondrial and other systems by carrying ions across lipid barriers as lipid-soluble complexes. Accordingly we propose to classify them generically as ionophores or ionophorous agents. 1984 E. Holtzman & A. B. Novikoff Cells & Organelles (ed. 3) ii. i. 74 Most known ionophores are synthetic molecules or special products of microorganisms. 1993 Beef Improvem. News (Melbourne) May 25/1 Ionophores offer Australian beef producers a management option for increasing productivity. 1993 Cell 73 227/1 When treated with phorbol diester plus calcium ionophore, mature thymocytes are induced to proliferate. 2005 Perkins (Oklahoma) Jrnl. 17 Mar. a10/2 Ranchers should consider using a supplement containing an ionophore in the growing diet of the heifers. Derivatives iˌonoˈphorous adj. containing, relating to, or involving an ionophore (sense 3). ΘΚΠ the world > life > biology > biological processes > movement > [adjective] > of ions or protons ionophorous1967 ionophoric1968 1967 B. C. Pressman et al. in Proc. National Acad. Sci. U.S.A. 58 1954 We propose to classify them generically as ionophores or ionophorous agents. 1979 Nature 20 Dec. 851/1 Another ionophorous antibiotic capable of transporting Ca2+. 2008 M. Kaldhusdal & F. T. W. Jordan in M. Pattison et al. Poultry Dis. (ed. 6) xviii. 205 The ionophorous anticoccidials are generally very effective against C. perfringens. This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1939 |
随便看 |
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。