After cooling, a drop from the lower layers will show under the microscope the dark-brown rhombic crystals of haemin in case blood-coloring matter was present in not too minute quantity.
Footnote 45: Haemin crystals may be produced by boiling in a test-tube a little of the suspected fluid or sediment with an excess of glacial acetic acid and a few particles of common salt.
Should doubt still remain, then the microscope, the spectroscope, or the test for haemin crystals may be called into requisition (see p.
The presence of blood-coloring matter can also be readily detected by the production of haemin crystals.
We ought not to omit to notice that Athenagoras quotes one uncanonical saying, introducing it with the phrase [Greek: palin haemin legontos tou logou].
Greek: houtos gar prepon estin haemin plaerosai pasan dikaiosynaen]), which also has no parallel in the other Gospels.
Crystals of haemin (first discovered by Teichman) are formed when dry blood is dissolved in concentrated acetic acid, and the solution evaporated to dryness: they are of a brownish-red color.
The indications furnished by means of the spectroscope are less reliable than those given by the production of haemin crystals; moreover, the spectroscopic examination requires favorable weather for its execution.
If the stains really originated from blood, haemin crystals will now be easily perceptible upon examining the residue obtained under the microscope.
The various methods now employed to produce haemin crystals were proposed by Hoppe-Seyler, by Brücke and by Erdman.
Where the stain is upon iron it is often impossible to prepare haemin crystals, and in such cases hydrogen peroxide is used as a reagent.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "haemin" in a variety of sentences. We hope that you will now be able to make sentences using this word.
