If the formaldehyde is not used up rapidly enough by the protoplasm, it kills the enzyme and the undecomposed hydrogen peroxide destroys the chlorophyll, which stops the whole photosynthetic process.
The formaldehyde is then condensed by the protoplasm into sugars, while the hydrogen peroxide is decomposed, by an enzyme in the plant cell, into water and oxygen.
By exposing the peroxide of iron to the oxidation flame, it is not acted upon, but in the reduction flame it becomes reduced to the magnetic oxide.
When heated with the intermittent flame, it requires a large quantity of the peroxide to produce an enamel appearance in the cooled bead.
It is decomposed by dilute acids into salts of peroxide and metal.
This is likewise the case with the peroxide of lead.
The addition of peroxide of iron renders the glass deep yellow while warm, the color becomes paler on cooling.
This rare metal occurs in the form of protoxide along with other oxides, in the mineral pitch-blende; as peroxide in uranite and uran-mica, associated with phosphoric acid and lime.
This oxide does not occur pure in nature, but in union with the peroxide of iron and other substances.
The sesquioxide and peroxide give out oxygen when strongly heated, which can be readily detected by the increased glow which it causes, if a piece of lighted wood or paper is brought to the mouth of the tube.
Sodium perborate is also used in peroxide soaps, as this substance is decomposed by water into hydrogen peroxide and sodium metaborate.
These generate hydrogen peroxide by the addition of water.
Hydrogen peroxide in itself is an excellent disinfectant.
To overcome this objection various metallic peroxides are added to the soap, as sodium peroxide, zinc peroxide and barium peroxide.
He had an especially strong solution of peroxide of hydrogen made up, and I selected the smallest animal out of our herd of eighty to try it on.
But Merritt blew his whistle and passed on to the Circassian, and he made sheep's eyes and threw a chest as his fingers toyed with her peroxide locks.
We soaked cloths in theperoxide and covered the beast with them and then put blankets on top.
The barium peroxide having a superabundance of oxygen gives it up readily and the aluminum thus encouraged attacks the iron oxide and robs it of its oxygen.
A crucible filled with the thermit mixture is set up above the joint and the thermit ignited with a priming of aluminum and barium peroxide to start it off.
Ann had dark hair but she put peroxide on it to frighten it lighter.
Ann's hair became angry at the peroxide and got up and left her head.
A very small quantity produces a very striking effect in reddening solution of peroxide of iron.
The product of this decomposition is a peroxide of barium; it falls to pieces in water, without producing heat, disengages oxygen when boiled with water, and is reduced to a protoxide by a strong heat.
The nitric peroxide can be determined with a solution of potassium permanganate of N/10 strength, thus: Take a small conical flask, containing about 10 c.
The amount of real nitric acid (mono-hydrate) and the amount of nitric peroxide present in any sample should always be determined before it is used for nitrating purposes.
The glycerine, when diluted one-half, should give no deposit or separation of fatty acids when nitric peroxide gas is passed through it.
If a soluble peroxide is formed at the anode, or if the precipitated metal crystallize across the solution and touch the positive electrode, similar vitiated results are obtained.
The method of rapidly precipitating manganese peroxide is peculiar.
The manganese peroxide dissolves very readily, transforming its equivalent of ferrous sulphate into ferric sulphate.
The sulphate is obtained by heating the peroxide with sulphuric acid till there is faint ignition, dissolving the residue in water and crystallizing.
In the case of a steel or cast iron containing but little manganese it is convenient to dissolve the peroxide in 25 c.
It occurs native in hausmannite, and may be obtained artificially by igniting the sesquioxide or peroxide in the open air.
To dissolve the manganese peroxide thus obtained we measure exactly 50 c.
It is obtained artificially as a black powder by exposing the peroxide to a prolonged heat.
The minute structure of these bodies shows an extremely delicate tracery of fine tubes, sometimes empty, sometimes filled with loose calcareous matter dyed with peroxide of iron.
A large portion of the Permian series, as already remarked, consists of sandstones and marls, deeply reddened by peroxide of iron, and often accompanied by beds of gypsum or deposits of salt.
Do peroxide and protoxide of iron affect plants in the same way?
The peroxide of iron is a very good absorbent of ammonia, and consequently, as will be hereafter described, adds to the fertility of the soil.
Now, fill up the glass with an aqueous solution of peroxide of hydrogen, and observe the effects.
Defn: A coloring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.
Owing to the general condition of the patient, it is usually impossible to employ nasal douching or mouth washes, but spraying the cavities with peroxide of hydrogen or other antiseptics may be employed with benefit.
The treatment of the throat affection consists in employing antiseptic and soothing gargles, inhalations of chloride of ammonium, or a spray of peroxide of hydrogen, menthol, or eucalyptol.
Antiseptic sprays, such as peroxide of hydrogen, and ointments may be applied to the mucous membrane after cleansing.
Planté has succeeded in increasing the duration of the current by alternately charging and discharging the cell, so as alternately to form layers of reduced metal and peroxide of lead on the surface of the strip.
Thus, the positive pole retains oxygen and becomes covered with a thin coating of peroxide of lead, while the negative pole becomes reduced to a clean metallic state.
A Sprengel explosive made by mixing liquid nitrogen peroxide with carbon bisulphide, nitro-benzene or nitro-toluene.
Nitric acid may also be formed by the oxidation of ammonia by ozone, or peroxide of hydrogen.
With regard to the nitrates and nitrites, no doubt most of these are formed by electrical discharge, although a small portion of them may be formed by the oxidation of ammonia by means of ozone and peroxide of hydrogen.
Lead does not separate well as peroxide from urine, but if ammonium oxalate be added, and the lead deposited as metal, the reaction is quite as delicate as in aqueous solution, and 0.
The precipitated sulphide is dissolved in potassium sulphide, and the resultant solution, after warming with a little hydrogen peroxide to discolorize any poly-sulphides that may be present, electrolyzed with a current of 1.
A fair average sample, inclusive of this external layer, was prepared for examination, and was found to consist of Peroxide of iron (per cent.
Lump of red ironstone associated with sand and earthy substances, containing Peroxide of iron (per cent.
The micaceous ironstone (22b) was examined and found to contain of Peroxide of iron (per cent.
The magnetic ironstone (22a) was examined and found to contain of-- Peroxide of iron (per cent.
It was found to contain of-- Peroxide of iron (per cent.
Hypochlorite and peroxidereact with each other to produce free oxygen (harmless) and chloride (also harmless in any plausible concentrations).
If you happen to use hypochlorite or any other compound that releases chlorine, and you then wish to remove the residues, first rinse your specimens clean as well as is convenient, then soak them in very weak peroxide for a while.
Here however are comments on a few arbitrarily chosen points, in no particular sequence: * Browne seems to have worked before hydrogen peroxide became generally available, or possibly before its bleachng powers were recognised.
Other methods of bleaching only are worth trying when the specimens happen to contain a particular pigment that does not respond well to peroxide bleaching.
You might find that other peroxide compounds, such as perborates, work better still, but I have not yet had occasion to use them.
The hydrogen appears at the carbon, where it is acted upon by the oxygen of the peroxide of manganese.
The zincs should be as near chemically pure as can be obtained; the peroxideof manganese of the best quality and perfectly free from foreign substances, and the sal ammoniac the purest that can be manufactured.
This battery consists of a carbon rod surrounded by granular peroxide of manganese forming the positive pole and a piece of zinc for the negative pole, both elements being immersed in a solution of sal ammoniac (chloride of ammonia).
The lower portion is much more porous than the upper and is filled with a combination of pea-carbon and peroxide of manganese held in by a plug at the bottom.
This cell employs a chemical method of taking care of polarization, the depolarizing agent being peroxide of manganese, which is closely associated with the carbon element.
The positively charged electrode must not be considered as merely the carbon plate or rod alone, but rather the carbon rod with its surrounding mixture of peroxide of manganese and broken carbon.
Within this cylinder is contained a mixture of broken carbon and peroxide of manganese.
The ammonia is immediately dissolved in the water of the cell, and the hydrogen enters the porous cup and would speedily polarize the cell by adhering to the carbon plate but for the fact that it encounters the peroxide of manganese.
In some the carbon electrode, together with the broken carbon and peroxideof manganese, were packed into a canvas bag which was suspended in the electrolyte and usually surrounded by the zinc electrode.
This rod is held in the center of the zinc cup out of contact therewith, and the intervening space is filled with a mixture of peroxide of manganese, powdered carbon, and sal ammoniac.
