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Transformation channels

The use of the molecules of other (ethyl and heavier) alcohols with this object allows the replacement of the surface hydroxyl groups by the alcohol groups, although the pyrolysis of the latter does not remove oxygen atom. For the groups with a more complicated structure, new transformation channels arise with a higher transformation rate. For example, the thermal decomposition of the surface ethoxy groups follows the scheme... [Pg.239]

Depopulation of S]. It is now useful to define a number of transformation channels available to an "isolated" molecule on its SVL of the state. They are fluorescence emission (F) through Si - So radiative decay, Sj-/vvW Sq, internal conversion (IC), S -AVW intersystem crossing (ISC), isomerization or decomposition (D), and time evolution of the vibrational state (TEV or vibrational energy redistribution). All of these non-radiative processes can be collision-induced, and the efficiency of collision-induced relaxation can vary with the nature of the collision partner, pressure, and other experimental parameters. [Pg.7]

A similar set of transformation channels are also available for "isolated" molecules on the SVL of the state for example, phosphorescence emission (P) by - Sq radiative decay,... [Pg.7]

The physical reason for the conjugation of several concurrent chemical reactions is that the same intermediate (with its chemical potential that is an internal variable with respect to main reactants) may be involved in several transformation channels simultaneously. It is easy to discover that equations (2.12)—(2.13) can be transformed to equations... [Pg.89]

Consider two cocurrent stoichiometric stepwise processes with the transformation channels 21 and 22 ... [Pg.94]

For example, in the industrial process of reforming of gasoline fractions, one of the main target transformation channels is dehydrocyclization of linear C5+-paraffin, such as... [Pg.244]

Let us demonstrate that the presence of the thermodynamic conjugation with the undesired side transformation channels allows, in principle, the target process of the conversion of benzene to ethylbenzene to be achieved with the 100% selectivity provided that the undesired DEB product is added in a certain amount to the initial reaction mixture. Consider the first and second stepwise alkylation processes as thermodynamically conjugate (the third stepwise process is linearly dependent on these two processes). In doing so, the kinetic equations of the formation of ethylbenzene and diethylbenzene can be written in the Horiuti Boreskov Onsager form as... [Pg.248]

Many of the species involved in the endogenous metabolism can undergo a multitude of transformations, have many reaction channels open, and by the same token, can be produced in many reactions. In other words, biochemical pathways represent a multi-dimensional space that has to be explored with novel techniques to appreciate and elucidate the full scope of this dynamic reaction system. [Pg.564]

The term channel induction furnace is appHed to those in which the energy for the process is produced in a channel of molten metal that forms the secondary circuit of an iron core transformer. The primary circuit consists of a copper cod which also encircles the core. This arrangement is quite similar to that used in a utdity transformer. Metal is heated within the loop by the passage of electric current and circulates to the hearth above to overcome the thermal losses of the furnace and provide power to melt additional metal as it is added. Figure 9 illustrates the simplest configuration of a single-channel induction melting furnace. Multiple inductors are also used for appHcations where additional power is required or increased rehabdity is necessary for continuous operation (11). [Pg.130]

Power switch. The power switeh is going to be a transformer-eoupled N-ehannel power MOSFET. I plan to use a dual N-Channel MOSFET in an SO-8 paekage to help save on PCB spaee. The maximum input voltage is 14 VDC. Therefore, a Edss rating of -I-30VDC or higher will be satisfaetory. The peak eurrent is 2.8 A. [Pg.164]

Some particles sputtered from the surface are neutral whereas others are charged. Molecular particles can be emitted either as intact molecules or fragmented. The probability of the desorption of A into the emission channel X is given by the transformation probability P (A -> X ) ... [Pg.92]

Relays have inputs from several current transformers (CTs) and the zone of protection is bounded by these CTs. While the CTs provide the ability to detect a fault inside the zone, circuit breakers (CBs) provide the ability to isolate the fault by disconnecting all of the power equipment within the zone. Thus, a zone bonndai y is usually defined by a CT and a CB. When the CT is part of the CB it becomes a natural zone boundaiy. When the CT is not an integral part of the CB, special attention must be paid to the fault detection and fault interruption logic. The CT still defines the zone of protection, but communication channels must be used to implement the tripping function. Figure 1 shows the zones of protection in a typical system. [Pg.415]

Natural product synthesis poses the challenge to consider and develop new pathways of structural transformation. Natural products as targets for synthetic research possess a special fertility in this regard, because the structural channels of biosynthesis are not necessarily the conduits of organic synthesis. A. Eschenmoser19... [Pg.9]

These examples then suggest that any general and fundamental models of communication systems (at least for digital data) should emphasize the size of the alphabets concerned and the probabilities of these letters, and should be relatively unconcerned with other characteristics of the letters. An appropriate model for this purpose consists of a random process in place of the source, a transformation on the samples of the random process for the coder, a random process at the output of the channel depending statistically on the input to the channel, and a transformation in the decoder. We are, of course, interested in knowing what transformations to use in the coder and decoder to make the decoder output as faithful a replica of the source output as possible. [Pg.193]

Channels with frequency limited input and output. A function of time, (t), is said to be frequency limited to W cps (cycles per second) if it has a Fourier transform,... [Pg.245]

Abstract Hilbert space, 426 Accuracy of computed root, 78 Acharga, R., 498,539,560 Additive Gaussian noise channel, 242 Adjoint spinor transformation under Lorentz transformation, 533 Admissible wave function, 552 Aitkin s method, 79 Akhiezer, A., 723 Algebra, Clifford, 520 Algebraic problem, 52 linear, 53... [Pg.769]


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See also in sourсe #XX -- [ Pg.86 ]




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