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Cellulose form soluble

Pectins occur naturally in both soluble and insoluble forms. Soluble pectin occurs in plant juices and is particularly abundant in those juices which form jellies, such as black-currant and gooseberry. Insoluble pectins tend to occur in the green parts of plants, in fruit and in root crops.1 This insolubility is apparently due either to the presence of the pectin as its insoluble calcium or magnesium salt or because it is combined (esterified ) with cellulose or some other insoluble polysac-... [Pg.254]

Copovidone forms soluble films independently of the pH value, regardless of whether it is processed as a solution in water or in organic solvents. He offers better plasticity and elasticity than other povidones. On the other hand, films are also less tacky. Kollidon VA 64 usually absorbs water, and it is seldom used as the sole filmforming agent in a formulation. Normally it is better to combine it with less hygroscopic substances such as cellulose derivates [54], shellac, polyvinyl alcohol (PVA),... [Pg.1021]

Cellulose is soluble in several derivatizing and nonderivatizing solvents [20,44,45,46]. These, in general, are solvents that modify OH-groups covalently or that form strong secondary bonds... [Pg.1484]

Cellulose is soluble in a wide range of solvents from which it can be regenerated in unadulterated (crystalline) form [13]. This is accomplished in either fiber (especially staple fiber) form, in filament form or in any other form (sheets or films, sponges, etc.). Cellulose solvents are divided into derivatizing and nonderivatizing solvent systems [73]. The principle of deriva-... [Pg.1493]

Solubility hydroxyethyl cellulose is soluble in either hot or cold water, forming clear, smooth, uniform solutions. Practically insoluble in acetone, ethanol (95%), ether, toluene, and most other organic solvents. In some polar organic solvents, such as the glycols, hydroxyethyl cellulose either swells or is partially soluble. [Pg.331]

TEMPO-mediated oxidation. With regenerated and mercerized celluloses, the oxidation leads to water-soluble p-l,4-linked poly glucuronic acid sodium salt (cellouronic acid, CUA) quantitatively [16]. In contrast, with native celluloses having the cellulose I crystal structure, the cellulose slurries maintain the slurry states even after TEMPO-mediated oxidation. These modified celluloses form water-insoluble fibers [17]. This has enabled modification of the surface of cellu-losic fibers. [Pg.123]

Fiber comes in two forms soluble and insoluble. The most common insoluble fiber is cellulose, which is found in lettuce, carrots, bean sprouts, celery, brown rice, most other vegetables, many fruit skins, and pumpernickel bread. Insoluble fiber binds various molecules but otherwise merely forms bulk in the lower intestine. Soluble fibers include amylopectin and other pectins, as well as complex starches. Uncooked and mildly processed foods contain a higher proportion of this type of fiber. [Pg.483]

Carboxymethyl cellulose is an anionic water soluble polymer capable of forming very viscous solutions. Carboxymethyl cellulose is soluble in basic conditions and insoluble in acidic conditions. It is used as a thickener, stabilizer, and suspending agent Carboxymethyl cellulose inhibits ice crystal growth in frozen desserts and soft serve ice cream. It is also used to improve loaf volume during baking by stabilizing gas bubbles. [Pg.39]

Carboxymethyl cellulose (CMC) kar- bak-se- me-thol, - sel-yo- los, - loz (1947) n. The common name for a cellulose ether of glycolic acid. It is an acid ether derivative of cellulose formed by the reaction of alkali cellulose with chloroacetic acid. It is usually marketed as a water-soluble sodium salt, more properly called sodium carboxymethyl cellulose. The sodium salt of this compound is commonly used as... [Pg.160]

Cellulose acetate phthalate (CAP) or CeUace-fate Cellulose esters anionic 175 °C 2534.12 In add form, soluble in organic solvents and insoluble in water Hygroscopic 27 200 °C Ultra rapid freezing... [Pg.133]

D-Glucose oxidase has been immobilized, with retention of activity, by glutaraldehyde crosslinking on to an albumin-treated carbon paste electrode surface, and in conjunction with peroxidase by reaction with activated cellulose. A soluble, immobilized but active form of the enzyme has been produced by glutaraldehyde crosslinking. [Pg.470]

Perhaps the material can be reacted or degraded to form a soluble compound, which can then be characterized. An example is cellulose, a natural polymer that was part of the earliest discussions. Insoluble itselt it can be acetylated to form soluble cellulose acetate for molecular weight determination, by osmometry at the time. Then it was subjected to degradation to glucose and cellobiose, which were determined to be the monomer and dimer, respectively. [Pg.313]


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See also in sourсe #XX -- [ Pg.190 ]




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Cellulose solubilities

Solubility cellulosics

Soluble forms

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