Cellulose decomposition

Halsall, D M., Gibson, A.H., 1985. Cellulose decomposition and associated nitrogen fixation by mixed cultures of Cellulomonas gelida and Azospirillum species or Bacillus maceratis. Appl. Environ. Microbiol 50 1021-1026. 

The same may be observed with magnesium carbonate in cellulose [70] (Figure 26). The chemiluminescence intensity at a given temperature increases with pH of the sample almost linearly. As it is evidenced by DSC, the sample with pH 7.2 is the least stable. Figure 26 is also a demonstration of the much higher sensitivity of the chemiluminescence method when compared with DSC. DSC exotherms, which accompany the final stages of the cellulose decomposition... 

Minowa, T. Zhen, F. Ogi, T., Cellulose decomposition in hot-compressed water with alkali or nickel catalyst. Journal of Supercritical Fluids 1998,13, 253. 

Rowell etal. (1987b) produced PF-bonded flakeboard from acetylated southern pine (21.6 % WPG) or aspen (17.6 % WPG) flakes. This was not completely resistant to attack by termites Reticulitermes flavipes) in a 4-week test. It was thought that acetylation was less effective in preventing termite attack than other chemical modifications because cellulose decomposition in the intestines of termites leads to acetic acid formation in any case. 

Ce +. 35 341-342, 356-357 Cell membranes, lithium, 36 58-61 Cellulose decomposition, 46 316-317 Cerium... 

Recent approaches directed toward preventing oxidation of cotton cloth included using accelerated aging of alkaline-treated cotton cloth for neutralization of acidic, oxidized, cellulose decomposition components that in cellulosic textiles and in paper are responsible for age tendering and yellowing. Conclusions regarding the relative effectiveness of treatments at room temperature were based on results of treatments at one elevated temperature (8). Predictions of long-term effects of these treatments are unknown (9). 

In our previous work, hydrolysis is played an important role at the first step of cellulose decomposition in hot-con ressed water without catalyst. In this study, the sugar, which is the hydrolyzed products of cellulose, was detected at low reaction temperature of 260 and 280 °C, and its concentration was about 40% in the water-soluble products. This means that hydrolysis also plays an important role for gasification with the nickel catalyst, and the obtained sugar can decomposed quickly to non-sugar products. 

Sakaki T. Shibata M. Miki T. Hirosue H. (1996) Reaction mrxiel of cellulose decomposition in near-critical water and fermentation of products. Bioresource Technol. 58, 197-202. 

Figure 6. Both hydrolytic and oxidative enzymes participate in cellulose decomposition by the white-rot fungus Phanerochaete chrysosporium Burds. Hydrolytic enzymes i, endo-1 - - I ucanases 2, exo-1,4- -glucanase and 3, -glucosidase. Oxidative enzymes 4, glucose oxidase, 5, cMlobiose oxidise and 6, cellobiose quinone oxidoreductase. Adapted from Reference 23,...

No attempt was made at this symposium to include all aspects of cellulose decomposition. Surveys of active organisms and interrelationships of organisms growing on complex substrates are certainly important problems. So are the properties of enzymes and the means of enhancing and preventing their action. All impinge on the aim of this symposium which is to stress the practical application of cellulolytic systems to worldwide problems. 

A hypothetical scheme of the development of a microbial community during cellulose decomposition in waterlogged soils is shown in Figure 5.43 (Saito et al., 1990). During cellulose decomposition. 

Results to date strongly imply that, depending on the residence time, the tar yields for final pyrolysis temperatures above 300 0 will be independent of heating rates. This observation is strengthened by the finding from TGA data analysis that the apparent activation energy for cellulose decomposition is similar to that for tar formation. 

Schmidt, E. L., and Ruschmeyer, 0. R., Cellulose decomposition in soil burial beds I. Soil properties in relation to cellulose degradation, Appl. Microbiol, 6(2) Mar (1958), 108-114. 

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