Fibers insoluble

The detergent method for insoluble fiber superseded the cmde fiber method and became the method of choice for insoluble fiber analysis until the 1980s, when methods were developed to recover soluble fiber as well. Some analysts still prefer the NDF procedure for insoluble fiber. The method is simple, inexpensive, reproducible, and amenable to routine assays. The disadvantage is the inabiUty to recover the soluble fraction. See Reference 14 for more information on detergent methods. 

Other Insoluble Fiber Sources. Other iasoluble fiber sources are commercially avaUable as weU, including fiber from sugar-beet pulp, a by-product of sugar productioa. Table 3 Usts other iasoluble fiber sources. 

Solid particulates are captured as readily as hquids in fiber beds but can rapidly plug the bed if they are insoluble. Fiber beds have frequently been used for mixtures of liqmds and soluble sohds and with soluble solids in condensing situations. Sufficient solvent (usually water) is atomized into the gas stream entering the collector to irrigate the fiber elements and dissolve the collected particulate. Such nber beds have been used to collect fine fumes such as ammonium nitrate and ammonium chloride smokes, and oil mists from compressed air. 

The silk production process must have some built-in temporal, mechanical, and chemical flexibility. This is evident in the ability of the animal to switch from long-duration storage of the proteins (in an aqueous solution state) to high-speed extrusion spinning (into an insoluble fiber with... 

Psyllium is an excellent dietary source for both soluble and insoluble fibers and has been used in supplemental and food products for its beneficial health effects. The strong water-absorbing and gelling capacities have made it a great challenge to incorporate psyllium in foods at the level needed to claim health benefits on the label. This review is focused on the approaches to improve the functionality. 

It is well accepted that the soluble fiber is the primary contributor for the beneficial health effects of psyllium especially the cholesterollowering activity, while the insoluble fiber may also have a contribution. The effects of solid-state enzymatic treatment on fiber contents were investigated for the modified psyllium. Shearzyme 500 L, Viscozyme L, and Pentopan Mono BG treatments all caused loss of soluble fiber under... 

FIGURE 4.5 Effects of solid-state enzyme treatment on (A) soluble fiber and (B) insoluble fiber contents in psyllium. P, the Pentopan Mono BG S, the Shearzyme 500 L from Novo Nordisk Ferment Ltd. (Switzerland) lOOP, 100 units of P 12S, 12 units of S and Psy stands for the commercial psyllium husks, the starting material for the solid-state enzymatic reaction (re-drawn from Yu and Perret, 2003a). 

Amongst the important chemical conversions of macromolecular substances are the various reactions of cellulose. The three hydroxy groups per CRU can be partially or completely esterified or etherified. The number of hydroxy groups acetylated per CRU are indicated by the names, i.e., cellulose triacetate, cellulose 2-acetate, etc. Another commercially important reaction of cellulose is its conversion to dithiocarboxylic acid derivatives (xanthates). Aqueous solutions of the sodium salt are known as viscose they are spun into baths containing mineral acid, thereby regenerating the cellulose in the form of an insoluble fiber known as viscose rayon. 

Multiple r2 values of 0.9346 and 0.9280 were obtained for these equations of capacity and stability, respectively. The relative importance of each respective partial regression coefficient was determined by comparison of B values (32). These evaluations indicate that the most important variables in the two models for foam capacity and stability are soluble protein, soluble and insoluble carbohydrate and ash, and insoluble fiber. 

The beneficial effects of dielary fiber, including both soluble and insoluble fiber, are generally recognized. Current recommendations arc for daily intakes of 20-35 g in a balanced diet of cereal products, fruits, vegetables, and legumes. However, the specific preventive role of dietary fiber in certain diseases has been difficult to establish, in pan because dielary risk factors such as high saturated fat and high protein levels are reduced as fiber levels increase. 

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