Microbiological decomposition

McCormick, L.L. and A.E. Hiltbold. 1966. Microbiological decomposition of atrazine and diuron in soil. Weeds 14 77-82. 

The efficacy of chemical and photochemical decolourization of dyes in the effluent of textile factories has been proved many times. However, in the majority of cases these methods are relatively expensive and the solid catalysator used for the oxidation sometimes presents a new problem for environmental protection. Microbiological methods are less expensive, the dyes are decomposed to small organic and inorganic molecules which can be taken up by micro-organisms as carbon and nitrogen sources. Also, in the case of microbiological decomposition of dyes, liquid chromatographic techniques can be... 

Janko, Z., Stefaniak, H., and Czerwinska, E. Microbiological decomposition ofduron [7V,7V-dimethyl-N -(3,4-dichlorophenyl)-urea], in Chem. Abstt. 78 25271n, Pr. Inst. Przem. Org., 2 2418257, 1970. 

Rochkind-Dubinsky, M. L., Sayler, G. S. Blackburn, J. W. (1987). Microbiological Decomposition of Chlorinated Aromatic Compounds. New York Marcel Dekker. 

In order to clarify the mechanism of microbiological decomposition of organic carbon and nitrogen of detritus in the lake water, the gaseous and nitrogenous components as well as the other chemical characteristics were determined in Lake Kizaki-ko, September 7-8, 1963 and October 28-31, 1963 when stagnation had greatly advanced in the lake. 

Solid state —> colloidal state — soluble or gaseous state In order that the relationship between the microbiological decomposition rates of organic carbon and nitrogen in the bottom sediments be known more fully, the following components were measured ... 

Some colloidal or higher molecular products exist in the sediments as intermediate breakdown products between the organic matter in solid state and matter in soluble or gaseous state as a consequence of microbiological decomposition. Separating the intermediate breakdown products from the decomposing sediments was accomplished as follows. 

The relationships between the ratios of Org. C/Org. N mentioned above indicate that the organic nitrogen in plankton is subjected more intensively to microbiological decomposition processes than organic carbon in the course of their sinking in lake water and also soon after they settled on the bottom surface. 

Cyclodextrins are torus-shaped molecules with hydrophobic cavities between 0.5 and 0.85 nm. They can store other molecules that fit into these cavities depending on their shape and intermolecular attraction. The empty cavities can be filled with organic molecules from sweat so that their microbiological decomposition and the formation of malodours are prevented. On the other hand, the malodorous decomposition products can also be stored if they can fit into the cavities. These bound molecules can then be removed by normal washing. 

Fig. 11) the pollutants adsorption was faster tlian microbiological decomposition. Similar phenomena have been als(j observed for the case when a column, functioning as the second-stage denitrification, was turned into tlie aeration... 

The reactivity, fate, and distribution of bound solutes are certainly changed by association with stream humic substances. The rate of photolysis of certain organic compounds (Zepp et al., 1981a,b), the rate of volatilization of polychlorinated biphenyls (Griffin and Chian, 1980), the bioaccumulation of polynuclear aromatic hydrocarbons in fish (Leversee, 1981), the rate of humic acid induced acid-base catalysis (Perdue, 1983), and the rate of microbiological decomposition are some specific examples. The octyl ester of 2,4-D (2,4 DOE) was predicted by theoretical and mathematical models and found by experimentation to be resistant to base hydrolysis when bound to humic substances (Perdue, 1983). The same model predicted the humic acid catalyzed hydrolysis of atrazine as demonstrated by Li and Felbeck 11972). 

The activated sludge process uses an enriched bacteria suspension to which normal or 02-enriched air is added. Surface aerators blow the oxygen required for microbiological decomposition into the water of the activated sludge tank. A downstream settling tank is used to separate and prethicken the bacteria suspension. The following criteria are essential for smooth operation of the facility... 

Bos FI, Mussig J, van den Oever M (2006) Mechanical properties of short flax fiber reinforced compounds. Compos A Appl Sci 37(10) 1591-1604 Bose R (1952) A comparative study of the microbiological decomposition of some cellulosic fibers. Sci Cult India 17(10) 435 36... 

Figure 3.175 Molecular sulfur Sg, M 256, CAS 10544-50-0. Occurrence from soil samples (microbiological decomposition), impurities from rubber objects, and by-product in the synthesis of thio-compounds.

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