Cellulose Complex

Celluloses. Complex carbohydrates including gums, cellulose, methylceUulose, and carboxymethylceUulose also have found appHcation ia fat replacemeat. A good summary of the appHcatioa of these materials is available (21). 

Manufacture. Common to all manufacturing processes for CMC is the reaction of sodium chloroacetate [3926-62-3] with alkaU cellulose complex represented here as OH NaOH ... 

Today rayon is made by either the viscose or the cuprammonium process. The latter process is based on Schweitzer s discovery in 1857 that it is possible to dissolve cellulose in cuprammonium hydroxide, the soln being due to the formation of a Cu cellulose complex. The mfg procedure involves processing the cuprammonium soln by filtration and deaeration prior to pumping it thru holes in a spinneret into si alkaline w which coagulates the Cu-cellulose soln into rayon filaments. The filaments are then stretched to the desired fineness (Ref 11). The viscose process is the most widely used because of its great versatility and low cost operation. 

The difficulty encountered in separating lignin from the cellulose of wood without the intermediate use of hydrolytic conditions,43 as well as the fact that some workers have isolated uniform, lignin-cellulose complexes,44 has suggested the presence of a carbohydrate-lignin compound. 

The directions of the transitions between the various phases are indicated by the arrows, i.e., a transition from D to III is possible on application of dry heat. A transition from III to D is impossible unless a strong swelling agent like ammonia is used. A transition from III to I is possible by the application of water and heat or by a prolonged application of water at ambient conditions. The reverse transition is impossible without an intermediate swelling step. The transitions are usually not complete, especially in industries, and a wide range of products can be obtained as indicated by the phase diagram. The ammonia-cellulose complex and cellulose in can also be obtained from cellulose II. There is, however no reversion to cellulose I. 

Sarko, A., Nishimura, H., and Okano, T., Crystalline alkali-cellulose complexes as intermediates during mercerization, in The Structures of Cellulose, Atalla, R.H., Ed., ACS Symposium Series, No. 340, American Chemical Society, Washington, D.C., 1987, p. 169. 

Influence of Solvents. Esterification is significantly influenced by the nature of the reaction medium depending on whether it is a swelling agent, or a solvent for cellulose or esterified products. The function of solvents [173] is often involved in the formation of the cellulose complex or chemical derivatives, which could affect the reactivity of specific hydroxyl groups. 

Cu / lignin complexes physically adsorbed on wood constituents Cu / cellulose complexes... 

The fractionation depends on many factors. The basic process, however, is partition of the solute (oligonucleotides) between a stationary phase (water absorbed by the cellulose fibres of the paper) and a moving phase (the chromatographic solvent). The behaviour of the solute thus depends on its partition coefficient between the water-cellulose complex and the chromatographic solvent. Solutes with relatively high solubilities in the chromatographic solvent will move rapidly and those with relatively low solubilities will move slowly. Thus, in a mixture of solutes separation will occur due to differences in partition coefficient between the components of the solute. 

Particularly fine colors are displayed by the metal complexes of formazans derived from viscose rayon. The copper, cobalt, and uranium cellulose complexes represent a new type of the so-called chemically colored threads. 

Layer Fbl cellulose Complex formation of polyundylic aad (6 mg/ml) with desoxyadenosme oligonucleotides... 

GURVICH, A.E. KORUKOVA, A. (1986) Induction of abundant antibody formation with a protein-cellulose complex in mice. Journal of Immunological Methods, 87, 161-167. 

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