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.
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.
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.
Conversely, by heating protocatechuic acid with potash and methylene iodide, piperonylic acid was regained.
These results show that piperonylic acid is the methylene ether of protocatechuic acid.Advertisement
Methylene iodide, CH 2 I 2, has a density of 3.33, and may be diluted with benzene.
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.
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.
C 6 H 7 0, is obtained by condensing sodium aceto-acetate with methylene iodide, the ester so formed being then hydrolysed.
Methylene blue is an example of an artificial hydrogen acceptor, or redox indicator.Advertisement
The first method invented was a chemical solvent method using either methylene chloride or ethyl acetate.
The best way to achieve this is to use methylene blue solution to darken the water in the jar.
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).
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.