In this solution a weak solution of caustic potash is employed as a mordant:-- Saturated alcoholic solution of methylene blue 3 volumes.
The student should provide himself with the following dyes in powder:-- *Methylene blue.
I believe the change which occurs when luciferin is oxidized is similar to that which occurs when the leuco-base of methylene blue or sodium indigo-sulphonate is oxidized to the blue dye.
In the case of methylene blue, reduction consists in the addition of two hydrogen atoms.
As we shall see, it is probably similar to the oxidation of reduced haemoglobin or the oxidation of leuco methylene-blue to methylene blue.
The stains of most importance are carmine, methylene blue, haematoxylin, gold chloride and Bismarck brown.
They are found in the cytoplasma, or in the cell-sap, and can be fixed in picric acid and stained in methylene blue.
Thus when nitrobenzene is reduced by iron and an acid we get aniline; similarly when nitrosodimethylaniline is reduced by zinc and an acid we get amidodimethylaniline, and this is the base used in the preparation of methylene blue.
The micro-organism of tubercle, for example, was in this way found by Koch to be readily stained by methylene blue, and its detection was thus rendered possible with certainty.
Instead of using the diamidobenzene, Caro used its dimethyl-derivative, and by this means obtained a splendid blue dye, which was introduced under the name of "methylene blue.
As specially suitable we must mention fuchsin, methyl green, methyl violet, methylene blue.
Jenner's stain consists of a solution in methyl alcohol of the precipitate formed by adding eosine to methylene blue.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "methylene blue" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
