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Enantiomerically pure 2,8-diazabicyclo[3.2.1]oct-2-ene derivatives (+)-5 and (-)-5 have been obtained from 2-azido-3-tosyl-7-azabicyclo[2.2.1]heptanes (+)-1 and (-)-2 and their enantiomers, by ring expansion under radical conditions. Compounds (+)-5 and (- ...
The gasification reaction of fir charcoal with CO2 was studied by isothermal thermogravimetric analysis under kinetic control. The derived reaction rate (r = dX/dt) as a function of the converted carbon mass (X) was compared with random pore model predicti ...
The catalytic ignition-extinction limits and oscillatory behavior of the CO oxidn. at atm. pressure over Pd supported on glass fibers were investigated as a function of catalyst sp. surface area, surface concn. and dispersion of Pd. The ignition-extinction ...
In oversampled analog-to-digital conversion, the usual reconstruction method using lowpass filtering leads to a mean squared error (MSE) inversely proportional to the oversampling ratio R. The authors prove, under certain assumptions and with periodic anal ...
A straightforward sequence of reactions allowed the conversion of D-(+)-mannose and D-(+)-ribono-1,4-lactone into erythro-(2S,3R)- and threo-(2S,3S)-sphingosine, resp. [on SciFinder (R)] ...
The thermal, bulk polymn. of styrene is conducted in a pilot plant consisting of a recycle tubular reactor followed by a tubular reactor. The conversion of the pre-polymn. part is in the range of 0 to 60% and at the outlet of the pilot plant ?96%. Studies ...
The conversion of monomers during radical polymn., e.g., cyclopolymn. of diallyldimethylammonium chloride [7398-69-8] in water, is detd. continuously by detg. the change of d. of the soln. with an app. which detects changes in the frequency of elec. stimul ...
The use of electrical equipment in rail and ship transportation is bound to consideration on mass and size, particularly because of conventional low frequency transformers. On this paper, an optimized multilevel converter with medium frequency transformer ...
Accuracy of simple analog-to-digital conversion depends on both resolution of discretization in amplitude and resolution of discretization in time. For implementation convenience, high conversion accuracy is attained by refining the discretization in time ...
The oxidation of C2H4 over an Ag catalyst was used as model system to determine the effect of cyclical variation of process parameters such as temperature, concentration, or mean residence time on conversion, yield, and selectivity to ethylene oxide. Impro ...
