In this case the fading of colour is directly due to deterioration of the paper itself, and may occur in celluloses of the best type.
Although the soluble constituents of the pecto-celluloses amount to 50 per cent.
The treatment of cellulose with nitric acid gives a number of nitro-celluloses according to the conditions of the process.
This term is applied to certain compound celluloses present chiefly in mucilages, gums, and in seaweeds (Algae).
It is for this reason that the celluloses from straw and esparto are inferior to the cotton cellulose in producing a paper likely to be permanent.
The only vegetable substance which may be regarded as a simple cellulose is cotton, all others being compound celluloses of varying constitution, the nature of which cannot be appreciated without a considerable knowledge of chemistry.
The celluloses obtained from various plants are not identical either in physical structure and chemical constitution, or as to their behaviour when employed for paper-making.
Both galactans and mannans commonly occur associated with cellulose and hemi-celluloses in the seeds or other storage organs of plants.
The pectins more nearly approach to the composition, properties, and functions of the celluloses than do any of the other groups of organic compounds.
If this view should finally be established as a fact, this sub-group of supposed compoundcelluloses should be dropped from consideration as such.
They differ in structure from the fibrous celluloses and are probably not cell-wall building material.
Vieille's powder invented for use in the Lebel rifle, and which consisted of a mixture of the nitro-celluloses with paraffin.
The nitrates are next weighed out and dissolved in hot water, and to this solution is added the mixture of nitro-celluloses and calcium carbonate with constant stirring until the entire mass becomes a homogeneous paste.
The calcium carbonate is also finely pulverised and dried, and is added to the mixed nitro-celluloses after they have been sifted through a 16-mesh sieve.
In the case of unstable nitro-celluloses heated under the conditions described, the separation of nitrogen is much greater at first than at a later period.
The nature of the associated groups affords a convenient classification into pecto-celluloses, ligno-celluloses and cuto-celluloses.
The celluloses of the phanerogams are generally associated, in a degree ranging from physical mixture to chemical union, with other complicated substances, constituting the "compound celluloses.
The cuto-celluloses have been only superficially investigated, and, with the exception of cork, are of but little direct industrial importance.
Other fibrous celluloses are equally characteristic as to form and appearance, e.
The topical cuto-celluloses are the epidermal tissues of all growing plants or organs, which are easily detached from the underlying tissues which it is their function to protect.
Ligno-celluloses find their chemical representative in the jute fibre.
When hydrolysed these fungoid celluloses yield, in addition to monoses, glucosamine and acetic acid.
The celluloses proper are essentially non-nitrogenous, though originating in the cell protoplasm.
This mixture may be further resolved, and by special quantitative methods the proportions of actual cellulose, ligno-cellulose and cuto-celluloses estimated (J.
The above figures have a purely empirical value, since they represent a complicated mixture of various residues derived from the celluloses and compound celluloses.
The acetates of hydrolysedcelluloses manifest a retrogradation in structural and physical properties, proportioned to the degree of hydrolysis of the original.
These two communications are a contribution of fundamental importance, and may be regarded as placing the question of the composition of the celluloses of these lowest types on a basis of well-defined fact.
The fibrous celluloses of which the typical members receive important industrial applications, graduate by insensible stages into the hemicelluloses which may be regarded as a well-established sub-group.
The purpose of the investigation was to test the validity of the statement that the celluloses are not attacked by alkaline hydrates at 180°.
Where the original celluloses are homogeneous we should thus obtain transformation series, similarly expressed to those of starch.
The lower grade of celluloses thus dissolved are only in part precipitated in acidifying the alkaline solution.
Straw and espartocelluloses are subjected to the processes of acid hydrolysis, and the neutralised extracts fermented.
The proteid and mineral constituents are attacked more or less, and the celluloses themselves are not entirely resistant to the action.
In this important point the celluloses behave as ketoses.
Also there is no suggestion as to how far the formula is applicable to the celluloses considered as a group.
The vegetable fibre substances arecelluloses and derivatives of celluloses, also typically colloidal bodies.
The artificial silks or lustra-celluloses are produced in this way, and have already taken an established position as staple textiles.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "celluloses" in a variety of sentences. We hope that you will now be able to make sentences using this word.
