Pectins composition

Fomi, E., Longoni, F., Maestrelli, A., Bertolo, G., and Torreggiani, D. 1998. Effect of osmotic dehydration on texture and pectin composition of 3 cultivars of strawberries. In Proceedings 4th Plenary Meeting EU-FAIR Concerted Action CT96-1118, Improvement of Overall Food Quality by Application of Osmotic Treatments in Conventional and New Processes , pp. 28-34. Thessaloniki, Greece. 

Liu, L. S., Finkenstadt, V. L., Liu, C.-K., Jin, T. Z., Fishman, M. L., Hicks, K. B. 2007a.. Preparation of Poly(Lactic acid) and Pectin Composite Films for Application in Antimicrobial Packaging. Journal of Applied Polymer Science, in press. 

Figure 4 Uniaxial tensile testing of two cellulose/pectin composites, before (thick lines) and after (thin lines) removal of pectin mediated by calcium chelation with CDTA...

His I., Driouich A., Nicol F., Jauneau A., and Hofte H. 2001. Altered pectin composition in primary cell walls of korrigan, a dwarf mutant of Arabidopsis deficient in a membrane-bound endo-1, 4-beta-glucanase. Planta 212(3) 348-358. 

The aim of the investigation was to study the influence of calcium and sodium ions, pectin containing extracts of aromatic vegetative raw materials and mumio on the carbopol gelation to develop the procedure of calcium and sodium ions mass part determination in extracts of aromatic vegetative pectin containing raw materials to establish the macro- and microelement composition of mumio. 

The determined macro- and microelement stmcture of mumio specifies onto the expediency of the application of this biologically active substance as a cosmetic raw material in the cosmetic compositions, which do not contain carbopol. The developed procedure for calcium and sodium ions determination in pectin-containing vegetative extracts is express and it is recommended for application at elaboration of cosmetic production compositions on the carbopol base. 

Climatic conditions, age, and the digestion process influence not only the structure of fibers but also the chemical composition. Mean values of components of plant fibers are shown in Table 4. With the exception of cotton, the components of natural fibers are cellulose, hemi-cellu-lose, lignin, pectin, waxes, and water-soluble substances. 

The differentiation of cells occurs concomitantly to modifications of wall components. The nature of the pectins of the walls changes under the action of enzymes, among which esterases, secreted between the apical meristematic cells and the more basal differentiated cells. The apposition of new layers of pectins with different compositions at the inner surface of the walls is another mechanism by which the cells adapt their immediate environment. Using the 2F4 antibody, we have observed, in plant suspensions as well as in tissues, a third mechanism involved in wall modification. Numerous invaginations of the... 

Table II. Carbohydrate compositions (weight percentage) of individual oligomer peaks purified (QAE-Sephadex or HPLC ion-exchange separation, respectively) from mixtures of citrus pectin oligomers or B fruit extracts Compositions shown are for peaks whose biological activity is described in Figure 4. Uronic acid values are based on colorimetric assay. Proportions of neutral sugars were determined by GC and adjusted so that totals equal 100%. In fact, some oligomers (G7 peaks 8, 9 and 10. B extract peak 10) produced small (less than 1 % of the total integrated area), unknown peaks in the GC chromatograms.

Plant cell walls provide the obvious functions of stmctural support and integrity and can vary tremendously in size, shape, composition and stmcture depending on cell type, age and function within the plant body. Despite this diversity, plant cell walls are composed of only three major classes of polysaccharides cellulose, hemicellulose and pectins. Pectins, or polyuronides, are imbedded throughout the cell wall matrix and are particularly abundant in the middle lamella region. Pectins generally account for 10-30% of the cell wall dry weight and... 

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