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methylene

methylene

methylene Sentence Examples

  • The true nitrile of malonic acid is methylene cyanide, CH 2 (CN) 2, which is obtained by distilling a mixture of cyanacetamide and phosphorus pentoxide.

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  • It is obtained by the oxidation of xanthene (methylene diphenylene oxide) with chromic acid; by the action of phosphorus oxychloride on disodium salicylate; by heating 2 2'-dioxybenzophenone with concentrated sulphuric acid; by distilling fluoran with lime; by the oxidation of xanthydrol (R.

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  • This tetrahedral configuration is based on the existence of only one methylene dichloride, two being necessary if the carbon valencies were directed from the centre of a plane square to its corners, and on the existence of two optical isomers of the formula C. A.

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  • (methylene) groups and the molecule consists of a single chain; such hydrocarbons are referred to as being normal; (2) has a branch and contains the group; CH (methine) in which the free valencies are attached to carbon atoms; such hydrocarbons are termed secondary or iso-; (3) is characterized by a carbon atom linked directly to four other carbon atoms; such hydrocarbons are known as tertiary.

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  • A larger and more important series of condensations may be grouped together as resulting from the elimination of the elements of water between carbonyl (CO) and methylene (CH 2) groups.

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  • methylene oxide if we assign to it the formula H 2 C O CH 2, but if the formula H 2 C O CH 2 (which assumes the presence of two free valencies) be accepted, the calculated and observed heats of formation are in agreement.

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  • Pyrrol is readily converted into pyridine derivatives by acting with bromoform, chloroform, or methylene iodide on its potassium salt, t3-brom-and O-chlorpyridine being obtained with the first two compounds, and pyridine itself with the last.

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  • Conversely, by heating protocatechuic acid with potash and methylene iodide, piperonylic acid was regained.

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  • These results show that piperonylic acid is the methylene ether of protocatechuic acid.

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  • It is formed by the condensation of acetylene tetrabromide with benzene in the presence of aluminium chloride: Br CH Br CH C H +C6H6=4HBr+C6H4) I, )C6H4, Br CH Br CH and similarly from methylene dibromide and benzene, and also when benzyl chloride is heated with aluminium chloride to 200° C. By condensing ortho-brombenzyl bromide with sodium, C. L.

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  • Methylene iodide, CH 2 I 2, has a density of 3.33, and may be diluted with benzene.

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  • In the "diffusion column" method, a liquid column uniformly varying in density from about 3.3 to I is prepared by pouring a little methylene iodide into a long test tube and adding five times as much benzene.

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  • There are polymers which have hardly any inter-relations other than identity in composition; on the other hand, there are others which are related by the possibility of mutual transformation; examples of this kind are cyanic acid (Cnoh) and cyanuric acid (Cnoh) 3, the latter being a solid which readily transforms into the former on heating as an easily condensable vapour; the reverse transformation may also be realized; and the polymers methylene oxide (CH 2 O) and trioxymethylene (CH20)3.

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  • a little hydrochloric acid, methylene diresorcin [(HO) 2 C 6 H 3] 2 CH 2, whilst with chloral hydrate, in the presence of potassium bisulphate, it yields the lactone of tetra-oxydiphenyl methane carboxylic acid (J.

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  • Ramsay, Ber., 1877, 10, p. 736); by heating pyrrol with sodium methylate and methylene iodide to 200° C. (M.

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  • C 6 H 7 0, is obtained by condensing sodium aceto-acetate with methylene iodide, the ester so formed being then hydrolysed.

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  • 3dicarboxylic acids) are obtained by the action of methylene iodide on disodio-pentane tetracarboxylic ester (W.

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  • Methylene blue is an example of an artificial hydrogen acceptor, or redox indicator.

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  • The first method invented was a chemical solvent method using either methylene chloride or ethyl acetate.

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  • methylene blue is a good example of a polychrome stain, which in this context really does amount to unpredictability.

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  • The best way to achieve this is to use methylene blue solution to darken the water in the jar.

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  • methylene chloride, a solvent used in the making of photographic film.

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  • methylene blue which gives the required color reaction should be used.

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  • methylene groups removed.

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  • methylene chain.

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  • methylene protons.

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  • methylene urea.

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  • Vol ut-in occurs in the cytoplasm of various Fungi, Bacteria, Cyanophyceae, diatoms, &c., in the form of minute granules which have a characteristic reaction towards methylene blue (Meyer).

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  • The true nitrile of malonic acid is methylene cyanide, CH 2 (CN) 2, which is obtained by distilling a mixture of cyanacetamide and phosphorus pentoxide.

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  • It is obtained by the oxidation of xanthene (methylene diphenylene oxide) with chromic acid; by the action of phosphorus oxychloride on disodium salicylate; by heating 2 2'-dioxybenzophenone with concentrated sulphuric acid; by distilling fluoran with lime; by the oxidation of xanthydrol (R.

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  • This tetrahedral configuration is based on the existence of only one methylene dichloride, two being necessary if the carbon valencies were directed from the centre of a plane square to its corners, and on the existence of two optical isomers of the formula C. A.

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  • (methylene) groups and the molecule consists of a single chain; such hydrocarbons are referred to as being normal; (2) has a branch and contains the group; CH (methine) in which the free valencies are attached to carbon atoms; such hydrocarbons are termed secondary or iso-; (3) is characterized by a carbon atom linked directly to four other carbon atoms; such hydrocarbons are known as tertiary.

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  • A larger and more important series of condensations may be grouped together as resulting from the elimination of the elements of water between carbonyl (CO) and methylene (CH 2) groups.

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  • methylene oxide if we assign to it the formula H 2 C O CH 2, but if the formula H 2 C O CH 2 (which assumes the presence of two free valencies) be accepted, the calculated and observed heats of formation are in agreement.

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  • Pyrrol is readily converted into pyridine derivatives by acting with bromoform, chloroform, or methylene iodide on its potassium salt, t3-brom-and O-chlorpyridine being obtained with the first two compounds, and pyridine itself with the last.

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  • Conversely, by heating protocatechuic acid with potash and methylene iodide, piperonylic acid was regained.

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  • These results show that piperonylic acid is the methylene ether of protocatechuic acid.

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  • It is formed by the condensation of acetylene tetrabromide with benzene in the presence of aluminium chloride: Br CH Br CH C H +C6H6=4HBr+C6H4) I, )C6H4, Br CH Br CH and similarly from methylene dibromide and benzene, and also when benzyl chloride is heated with aluminium chloride to 200° C. By condensing ortho-brombenzyl bromide with sodium, C. L.

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  • Methylene iodide, CH 2 I 2, has a density of 3.33, and may be diluted with benzene.

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  • In the "diffusion column" method, a liquid column uniformly varying in density from about 3.3 to I is prepared by pouring a little methylene iodide into a long test tube and adding five times as much benzene.

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  • There are polymers which have hardly any inter-relations other than identity in composition; on the other hand, there are others which are related by the possibility of mutual transformation; examples of this kind are cyanic acid (Cnoh) and cyanuric acid (Cnoh) 3, the latter being a solid which readily transforms into the former on heating as an easily condensable vapour; the reverse transformation may also be realized; and the polymers methylene oxide (CH 2 O) and trioxymethylene (CH20)3.

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  • a little hydrochloric acid, methylene diresorcin [(HO) 2 C 6 H 3] 2 CH 2, whilst with chloral hydrate, in the presence of potassium bisulphate, it yields the lactone of tetra-oxydiphenyl methane carboxylic acid (J.

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  • Ramsay, Ber., 1877, 10, p. 736); by heating pyrrol with sodium methylate and methylene iodide to 200° C. (M.

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  • C 6 H 7 0, is obtained by condensing sodium aceto-acetate with methylene iodide, the ester so formed being then hydrolysed.

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  • 3dicarboxylic acids) are obtained by the action of methylene iodide on disodio-pentane tetracarboxylic ester (W.

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  • If oxygen treatment is not effective, then a solution of 1.0 percent methylene blue may be injected in a dose of 1.0 mg methylene blue/kg body weight.

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