Organic components cellulose

This technique, as discussed above under Accelerated Solvent Extraction , has the outstanding advantage that extraction with water as opposed to organic solvents does not cause contamination of the extract with potentially interfering organic components such as cellulose, lignin and waxes originating in plant cells or interference due to contamination by the solvent or impurities therein. 

A short discussion is also in order regarding the biochemical pathways to the polysaccharides (celluloses and hemicelluloses), which are the dominant organic components in most biomass, and the lignins, proteins (polypeptides), and triglycerides (lipids or fats) that are found in biomass. Most biomass on... 

Typical organic components in representative, mature biomass species are shown in Table 3.9 along with the corresponding ash contents. With few exceptions, the order of abundance of the major organic components in whole-plant samples of terrestrial biomass is celluloses, hemicelluloses, lignins, and proteins. Aquatic biomass does not appear to follow this trend. The cellulosic components are often much lower in concentration than the hemicelluloses as illustrated by the data for water hyacinth. Other carbohydrates and derivatives are dominant in species such as giant brown kelp to almost complete exclusion of the celluloses. The hemicelluloses and lignins have not been found in this species. 

Dipolar dephasing has been investigated as a means for quantitatively differentiating protonated and non-protonated and molecularly mobile and rigid components in soil organic matter. Cellulose, hemicelluloses, lignin, a protein, chitin, charcoal, palmitic acid and two waxes have been used as model systems for components of soil organic matter. 

Plants (and other autotrophs) can use CO2 as the sole source of the carbon atoms required for the biosynthesis of cellulose and starch, lipids and proteins, and the many other organic components of plant cells. By contrast, heterotrophs cannot bring about the net reduction of CO2 to achieve a net synthesis of glucose. 

Organic Components. wt% Crude Protein Cellulose Hemicellulose Lignin... 

Table 8.5 shows the FTIR bands of rice husk where the characteristic peaks associated with organic components are observed. CH asymmetric (5743 cm ). C = O stretching hemicelluloses (1745 cm ) [28]. The absorption band at 3387 cm corresponds to the combined bands of the NH and OH group stretching vibration to chitosan [29]. The vibrations of the aromatic rings can be observed at 1846, 1718, 1413 and 1077 cm, respectively. At 3125 and 2849 cm were attributed at CH stretching in cellulose-rich material. Both cellulose/hemicelluloses -and lignin- associated bands are present in the... 

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