The spectroscope may also be employed, in which alkaline solutions of haematin produce an absorption-band between C and D, usually reaching or passing D.
Blood which has been acted upon by the gastric juice is coagulated, has a grumous consistence, and acquires by the formation of haematin out of haemoglobin a dark-brown color, often compared to that of coffee-grounds.
The secretion of Drosera and gastric juice were both able to dissolve some element or impurity out of the globulin and haematin employed by me.
On the third day the glands in contact with the haematin were blackened, and some of the tentacles seemed injured.
But this substance, as well as the so-called haematin used by me, ought perhaps to have been classed with indigestible substances.
That neither haematin nor haematosin has been effused into my sheaths, that my capillaries remain undilated, and that I am proudly conscious of having escaped both atheroma and infarctions, I must ask my readers to accept my word.
Thus, it would appear that the unit structural groups in haematin and in chlorophyll are identical; although chlorophyll may exhibit more variations in isomeric arrangement of these structural units than have been found in haematin.
This change in the spectrum is due to the passing of the haemoglobin into methaemoglobin, which may be considered as an intermediate stage of decomposition, prior to the breaking up of the haemoglobin into haematin and proteids.
Haematin is insoluble in water, alcohol, chloroform, and in cold dilute acetic and hydrochloric acids.
A minute crystal of sodic chloride being then added to the acetic acid solution, it is allowed to evaporate to dryness at the ordinary temperature, and crystals of haematin hydrochlorate result.
The haematin obtained by treating blood with acetic acid may be dissolved out by ether, and the ethereal solution then exhibits a remarkable distinctive spectrum.
Blood upon iron is frequently very intimately adherent; this is specially the case if the stain is upon rusty iron, for haematin forms a compound with iron oxide.
Illustration] If the spot under examination has been scraped off an iron implement the haematin is not so easily extracted, but Dragendorff states that borax solution at 50 deg.
It is the resistance of the haematin to decomposition and to ordinary solvents that renders it possible to identify a certain stain to be that of blood, after long periods of time.
The colouring matter of logwood is haematoxylin, which is converted into haematin by oxidation; hence, the extract is often referred to as haematin crystals.
The stains must not be washed with water, so that thehaematin may not be altered.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "haematin" in a variety of sentences. We hope that you will now be able to make sentences using this word.
