| 单词 | isomeric |
| 例句 | Figure 2.15 Glucose, galactose, and fructose are isomeric monosaccharides, meaning that they have the same chemical formula but slightly different structures. Concepts of Biology 2013-04-25T00:00:00Z This blue compound does not have any isomeric forms. Chemistry 2019-02-14T00:00:00Z Glucose, galactose, and fructose are common isomeric monosaccharides, whereas sucrose or table sugar is a disaccharide. Biology for AP Courses 2022-06-09T00:00:00Z The problem is that the exact energy of the isomeric state is currently unknown. One tick closer to a nuclear clock 2019-09-10T04:00:00Z Not isomeric; not made of the same components in the same proportions. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Or how is it that even isomeric compounds may exhibit different qualities? A Review of the Systems of Ethics Founded on the Theory of Evolution 2012-03-17T02:01:00.033Z He supposed the evolution of some substance like protein, which is capable of existing in many isomeric forms, and of forming with itself and other elements, substances yet more intricate in composition. Herbert Spencer 2012-02-29T03:00:20.773Z Levulose, lev′ū-lōs, n. a sugar isomeric with dextrose, but turning the plane of polarisation to the left. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) 2012-01-11T03:00:23.770Z Finally, the nucleus decayed directly to the isomeric state. One tick closer to a nuclear clock 2019-09-10T04:00:00Z A carbohydrate, isomeric with cane sugar, contained in gum arabic, from which it is extracted as a white, amorphous substance. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z It is therefore isomeric with the hydrocarbon of caoutchouc and with that of oil of turpentine. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z The raw oil, which chemically consists of the glycerides of oleic, oleo-margaric, and probably isomeric acids, is distinguished by its rapid drying properties. Paint Technology and Tests 2011-09-15T02:00:12.263Z In order to arrive at a conception of this multiplicity of isomeric forms, it is necessary to understand the two types of isomerism which are involved. The Chemistry of Plant Life The nucleus then decayed to the isomeric state. One tick closer to a nuclear clock 2019-09-10T04:00:00Z Owing to the structure of the naphthalene molecule there are two isomeric naphthols, whereas there is only one phenol. Coal and What We Get from It Many substitution derivatives are known: the monosubstitution derivatives being capable of existing in three isomeric forms. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" It consists largely of pinene and isomeric terpenes, and has the property of attracting oxygen, with the formation of peroxides which stimulate the drying of oils. Paint Technology and Tests 2011-09-15T02:00:12.263Z Thus, it would appear that the unit structural groups in hæmatin and in chlorophyll are identical; although chlorophyll may exhibit more variations in isomeric arrangement of these structural units than have been found in hæmatin. The Chemistry of Plant Life Seiferle et al.2 observed a process known as internal conversion, in which a thorium-229 nucleus in the isomeric state decayed to the ground state and the neutral atom emitted an electron. One tick closer to a nuclear clock 2019-09-10T04:00:00Z Three isomeric phthalic acids are known, but only one of these is of use in the present branch of manufacture. Coal and What We Get from It The constitution of the isomeric diazo hydroxides has given rise to much discussion. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" The rind of the citron yields two perfumes, oil of cedra and oil of citron, isomeric with oil of turpentine; and when candied it is much esteemed as a dessert and in confectionery. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" Hence, it is possible to start with one of these sugars, convert it into the osone and then reduce this to another sugar, thereby accomplishing the transformation of one sugar into another isomeric sugar. The Chemistry of Plant Life By studying the energy of emitted electrons, the authors estimated the energy of the isomeric state to be about 8.28 eV. One tick closer to a nuclear clock 2019-09-10T04:00:00Z The bricks represent atoms, and the whole structure represents a molecule; the structures all have the same ultimate composition, and are therefore isomeric. Coal and What We Get from It Quinidine, C20H24N2O2, is isomeric with quinine, from which it differs in crystallizing in prisms instead of needles, in being dextro- and not laevo-rotatory, and in being insoluble in ammonia except in much excess. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Obviously, isomeric ring-systems are possible, since the carbon atoms in the original rings are not all of equal value. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Professor Frankland, speaking of protein, for instance, says it is capable of existing under probably at least a thousand isomeric forms. Was Man Created? About 2% of the thorium ions were in the isomeric state. One tick closer to a nuclear clock 2019-09-10T04:00:00Z There are also isomeric quinones of the naphthalene series known as naphthaquinones. Coal and What We Get from It A fourth alkaloid, cinchonidine, is isomeric with cinchonine, which yields it when boiled with amyl alcoholic potash, but is laevo-rotatory, slightly soluble in ether, and faintly fluorescent. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Starting with the three isomeric compounds, he found that one gave two tribrombenzenes, another gave three, while the third gave only one. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Moreover, the phenomena attending isomeric change give a clue to those movements which are the only indications we have of life in its lowest forms. Essays: Scientific, Political, & Speculative, Vol. I Seiferle et al. then used a theoretical model to interpret the electron energy spectrum, which is the first energy spectrum observed from the decay products of the isomeric state. One tick closer to a nuclear clock 2019-09-10T04:00:00Z One of the most important properties of this group of acids is the formation of isomeric acids of higher melting point on treatment with nitrous acid, generally termed the elaidin reaction. The Handbook of Soap Manufacture They also separated a substance, C12H22O11, isomeric with maltose, which had, however, the characteristics of a dextrin. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" These three hydrocarbons are isomeric, i.e. they possess the same formula, but differ in constitution. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The mystery of isomeric substances appears, a vast number of new compounds of carbon appear, the face of the earth changes. The Breath of Life Although the ultimate and groundbreaking goal of directly observing the thorium-229 isomeric transition remains elusive, substantial progress continues to be made. One tick closer to a nuclear clock 2019-09-10T04:00:00Z When a slow current of HCl is passed through cooled spirits of turpentine, two isomeric compounds are formed, one solid, and one liquid. Scientific American Supplement, No. 711, August 17, 1889 It will be remembered that Prof. Meyer has recently discovered two isomeric series of derivatives of benzil, differing only in the position of the various groups in space. Scientific American Supplement, No. 643, April 28, 1888 They also employed isomeric mixtures of the gases; methylic ether, cyanogen, hydrogen, acetylene, and other gases were experimented upon, and the general conclusions are as follows: 1. Scientific American Supplement, No. 441, June 14, 1884. It forms with acids two classes of isomeric salts, some of which are of a green color, and the others violet-red or amethyst. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations And, in the last case, that of isomeric compounds, the appeal to diversity of arrangement of the identical component units was the only obvious way out of the difficulty. The Advance of Science in the Last Half-Century In the case just now assumed we arrive at the oxychloride; when, however, the metal and chlorine change places in the water molecule, the isomeric hypochlorous salts are the result. Scientific American Supplement No. 822, October 3, 1891 This phenomenon is called isomerism, and the generally accepted explanation is that the atoms in isomeric molecules are differently arranged, or grouped, in space. Four-Dimensional Vistas From the above experiments it seems to be probable that the camphor oil is a complicated mixture, consisting of hydrocarbons of terpene series, oxy-hydrocarbons isomeric with camphor, and other oxidized hydrocarbons. Scientific American Supplement, No. 460, October 25, 1884 Roberts-Austen, says the Engineer, remarks that the importance of the isomeric and allotropic states has been much neglected in the case of metals. Scientific American Supplement, No. 799, April 25, 1891 It is also obtained from tartaric acid, with which it is isomeric, and from sugar, gum, etc., by oxidation. The Gutenberg Webster's Unabridged Dictionary Section R Though isomeric with benzine, it is very different in its chemical relations. The Gutenberg Webster's Unabridged Dictionary Section D and E The latter is isomeric with pentagalloyl glucose and possesses similar properties; there is, however, a vast difference in the solubility of the two. Synthetic Tannins In cyanuric acid, hydrated cyanic acid, and cyamelide, we have three such isomeric compounds. Familiar Letters on Chemistry Were these merely isomeric, they ought to exhibit properties quite dissimilar! Familiar Letters on Chemistry |
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