Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 1, 2025
However carefully we examine it with our finest chemical reagents and most powerful microscopes, we can find no definite parts or no anatomic structure in it. Hence, the Monera are literally organisms without organs; in fact, from the philosophic point of view they are not organisms at all, since they have no organs.
The habit of carefully testing reagents, including distilled water, cannot be too early acquired or too constantly practiced; for, in spite of all reasonable precautionary measures, inferior chemicals will occasionally find their way into the stock room, or errors will be made in filling reagent bottles.
It is, however, possible to obtain a satisfactory, although somewhat fugitive end-point in the presence of manganous sulphate and phosphoric acid. The explanation of the part played by these reagents is somewhat obscure as yet. It is possible that an intermediate manganic compound is formed which reacts rapidly with the ferrous compounds thus in effect catalyzing the oxidizing process.
The reaction in the presence of hydrochloric acid is as follows: 6FeCl + K Cr O + 14HCl > 6FeCl + 2CrCl + 2KCl + 7H O. It will be recalled that the system of normal solutions is based upon the equivalence of the reagents which they contain to 8 grams of oxygen or 1 gram of hydrogen.
In Smithson's day, chemical apparatus was undeveloped, and instruments were improvised from such materials as lay readiest to hand. With such instruments, and with crude reagents, Smithson obtained analytical results of the most creditable character, and enlarged our knowledge of many mineral species.
A normal solution of an oxidizing agent should, therefore, contain that amount per liter which is equivalent in oxidizing power to 8 grams of oxygen; a normal reducing solution must be equivalent in reducing power to 1 gram of hydrogen. In order to determine what the amount per liter will be it is necessary to know how the reagents enter into reaction.
Our end is to place the object in its approximate class, having regard to advantageous employment or to everyday language. Then, and only then, we find our pigeon-holes all ready-made; and the same parcel of reagents meets all cases.
This power of resisting the ordinary reagents explains in a plausible manner why the fungus is not destroyed by the digestive process in the stomach, where, however, the acid reaction of the gastric juice probably arrests its development is that of the schistomycetes in general and keeps it in a state of temporary inactivity.
If no mark appears, the reagents are pure, and the suspected liquid may now be added. The hydrogen decomposes arsenious acid, and forms arseniuretted hydrogen. The gas carried off by a fine tube is again ignited.
You can get any man's or woman's secret, whose sphere is circumscribed by your own, if you will only look patiently on them long enough. Nature is always applying her reagents to character, if you will take the pains to watch her. Our studies of character, to change the image, are very much like the surveyor's triangulation of a geographical province.
Word Of The Day
Others Looking