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Polysaccharides protozoa

A number of organisms, including fungi, bacteria, actinomycetes, protozoa, and plants,5 release L-arabinose from L-arabinose-containing polysaccharides or from simple substrates, but it is difficult, strictly speaking, to conclude that a-L-arabinofuranosidase is produced by them. Reports of work in which this enzyme was highly purified and its enzymic proper-... [Pg.386]

Cellulose Cellulose is a straight-chain polymer of glucose units linked by (31-4 bonds. The polysaccharide chains are aligned to form fibrils that have great tensile strength. Cellulases, enzymes that degrade cellulose, are absent in mammals but are produced by some bacteria, fungi and protozoa. [Pg.274]

Manners DJ, Ryley JF, Stark JR (1966) Studies on the metabolism of the protozoa - the molecular structure of the reserve polysaccharide from Astasia ocellata. Biochem J 101 323-327... [Pg.116]

For many years, Hirst was a member of the Board of Governors of the Rowett Research Institute, Aberdeen, where he took a keen interest in the work of the Institute as a whole, and particularly that of Dr. A. E. Oxford and the microbiology department. This led to collaboration on the nature of the reserve carbohydrate synthesized by Cycloposthium and by the holotrich ciliates present in sheep s rumen. Both protozoal polysaccharides were shown to be amylopectin in type. The work was continued with other protozoa, in collaboration with J. F. Ryley, and the presence of starch or amylopectin-type polysaccharides was established in Chilomonas paratnecium, Haematococcus pluvialis, and Tet-raselmis carteriiformis. [Pg.11]

Plant Gums, E. L. Hirst. Proc. Int. Congr. Biochem., 4th, Vienna, 1958,1,31 (1959). Studies on the Metabolism of the Protozoa. Part VIII. The Molecular Structure of a Starch-type Polysaccharide from Chilomonas paramecium, A. R. Archibald, E. L. Hirst,... [Pg.28]

In contrast to the above-mentioned protozoa which synthesize glycogen-type polysaccharides, certain ciliates (for example, Cycloposthium) contain an amylopectin-type of polysaccharide, whilst the flagellate Polytomella caeca stores a typical two-component starch. ... [Pg.293]

Figure 6.6 Energy Flow Through the Activated Sludge Process. The ecosystem Is less complex than that of the filter bed (Figure 6.4). There are fewer trophic levels and the protozoa play only a minor role in purification. The bulk of the organic matter of the settled sewage is converted into bacterial biomass which is aggregated into polysaccharide based floes, removed by sedimentation, I.e. most of the available energy does not pass along the food chain, but is removed and dumped. Figure 6.6 Energy Flow Through the Activated Sludge Process. The ecosystem Is less complex than that of the filter bed (Figure 6.4). There are fewer trophic levels and the protozoa play only a minor role in purification. The bulk of the organic matter of the settled sewage is converted into bacterial biomass which is aggregated into polysaccharide based floes, removed by sedimentation, I.e. most of the available energy does not pass along the food chain, but is removed and dumped.
Yucca schidigera and Quillaja saponaria containing 4.4% and 10% saponins (Wang et al. 1998) decreased polysaccharide degrading enzymes (carboxymethyl-cellulase and xylanase) considerably and inhibited protozoa to the extent of 42% and 54% respectively (Hristov et al. 1999, 2003). Wang et al. (1998) studied the effect of yucca extract (0.5 mg/ml buffer) on rumen fermentation in RUSITEC and reported no effect on dry matter digestibility, gas production and volatile fatty acid production, but the protozoa numbers were significantly reduced, while the number of bacteria was not affected. [Pg.357]

Chitin—a polysaccharide polymer composed of N-acetyl-D-glucos-amine found in algae, arthropod and crustacean exoskeletons, fungal cell walls, and most protozoa. [Pg.14]

The cationic amino polysaccharide chltin is commonly found in nature. Present in many organisms such as fungi, seaweed, protozoa and arthropods. Chitosan a derivative of chitin is of remarkable economic interest due to its functional versatility, with potential application in... [Pg.1202]


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