Oxidation microbiological

Moir, J. W. B., and Ferguson, S. J., 1994, Properties of a Paracoccus denitrificans mutant deleted in cytochrome C550 indicate that a copper protein can substitute for this cytochrome in electron transport to nitrite, nitric oxide and nitrous oxide. Microbiology 140 3989397. 

Vinegar is produced by the oxidative microbiological conversion of a 6.0% by weight solution of ethanol in water to acetic acid in water as the sole carbon-containing product. 

Norjirimycin B (5-eunino-5-deoxy-D-mannopyranose) (44), the 2-epimer of norjirimycin with which it can be isolated from S. laven-dulae, can be oxidized microbiologically (Gluconobacter auboxydans) to the corresponding D-mannono-6-lactam (45) both of these compounds, characterized by n.m.r. and X-ray analysis, are powerful glycosldase Inhibitors.The synthesis of norjirimycin Is also... 

Many tracer chemicals are inherently unstable even as the unlabeled forms. Susceptibility of a chemical to hydrolysis, oxidation, photolysis, and microbiological degradation needs to be evaluated when designing suitable storage conditions for the labeled compound. Eactors that reduce radiolytic degradation, such as dispersal in solution, are apt to increase chemical degradation or instability. 

Sterile aqueous D-sorbitol solutions are fermented with y cetobacter subo >gichns in the presence of large amounts of air to complete the microbiological oxidation. The L-sorbose is isolated by crystallisation, filtration, and drying. Various methods for the fermentation of D-sorbitol have been reviewed (60). A.cetobacter suboyydans is the organism of choice as it gives L-sorbose in >90% yield (61). Large-scale fermentations can be carried out in either batch or continuous modes. In either case, stefihty is important to prevent contamination, with subsequent loss of product. 

Microbiological leaching of copper and uranium has been commercially developed and research has iadicated that microorganisms may be used to oxidize complex antimony sulfide minerals (22,23). If this technology is developed commercially, it may aHow for the exploitation of many low grade antimony deposits. 

Microbiological Oxidation. Styrene [100-42-5] can be oxidized to PEA by aerobic cultuting with a Pseudomonas bacterium ia the appropriate medium (101). Eor a medium containing peptone, (NH 2 04, Na2HP04 12H20, KH2PO4, MgSO and com steep Hquor, the yield is 2.34 mg/mL. 

The chemistry and performance of annatto extract is essentially that of bixia, a brownish red crystalline material that melts at 198°C. It is moderately stable toward light and has good stabiUty toward oxidation, change ia pH, and microbiological attack. Bixia is very stable toward heat up to 100°C, fairly stable at 100—125°C, and unstable above 125°C, where it tends to form 13-carbomethoxy-4,8-dimethyltridecahexanoic acid. 

Titanium Dioxide. The specifications of titanium dioxide have been given previously. Titanium dioxide exists ia nature ia three crystalline forms anatase, brookite, and mtile, with anatase as the commonly available form. Anatase has a high refractive iadex (2.52) and excellent stabiUty toward light, oxidation, changes ia pH, and microbiological attack. Titanium dioxide is virtually iasoluble ia all common solvents. 

Azocine, 1-benzoyloctahydro-microbiological oxidation, 7, 658 Azocine, dihydro-, 7, 660-662 Azocine, 1,2-dihydro-synthesis, 7, 660... 

Oxides of manganese and iron are often found deposited together. Similar conditions cause oxidation of both iron and manganese ions. Exposure to oxygenated water, chlorination, and some microbiological processes causes such oxidation. Often, a few percent chlorine is found in deposits, possibly because of associated chlorination. 

E. A. Davidson, in Production and Consumption of Greenhouse Gases Methane, Nitrogen Oxides, and Halomethanes, ed. J. E. Rogers and W. B. Whitman, American Society for Microbiology, Washington, 1991, p. 219. 

Capture efficiency is the fraction of generated contaminant that is directly captured by the hood. Measurement of capture efficiency involves measuring concentration of process-generated contaminant or a tracer material. Using process-generated contaminant requires use of instruments suited to each specific contaminant and its conditions (temperature, pressure, concentration, form, etc.). In order to facilitate these measurements, a tracer is often substituted for the process-generated contaminant. The tracer is usually a gas (sulfur hexafluoride, nitrous oxide, helium, or similar), but an aerosol (particles) can also be used (potassium iodide, polystyrene particles, microbiological particles, etc.). The chosen tracer should be as similar to the real contaminant as possible, but at the same time should... 

It was subsequently discovered that lucanthone is metabolized in the body in part to hycanthone (30), a compound with enhanced schistomacidal activity. The relatively high biologic activity of lucanthone in experimental animals compared to man was subsequently attributed to the inefficient hydroxylating system present in man for this biochemical conversion.Microbiologic oxidation of lucanthone by fermentation with the fungus Aspergil-lus scelorotium affords hycanthone. ... 

Nitrite formulations are employed for both hot and cold water closed loops (and also occasionally for open cooling systems). Unfortunately, nitrite is easily oxidized to nitrate and is very susceptible to microbiological attack (by Nitrobacter agilis and other microorganisms). Nevertheless, it is a good low-cost passivating inhibitor. 

Microbiological oxidation 292 Microwave spectroscopy, of cyclic sulphones and sulphoxides 388... 

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