Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Intrinsic information

In science in general, and in chemistry and in pharmaceutical research in particular, huge amounts of data are produced. The intrinsic information in these data is often difficult to grasp. In many cases, not only are the data themselves interesting, but the intrinsic relationships among the data are of particular interest. [Pg.439]

Note that Marechal [48,75] proposed an original peeling-off procedure, but in a very different perspective, whose purpose is to eliminate from a given experimental spectrum the features brought by multiple Fermi resonances, thus revealing the intrinsic informations on the hydrogen bond dynamics. [Pg.262]

Measurements in the laboratory are much more sensitive to spectral separations and hence understanding the spectrum of a molecule uniquely for the purposes of identification. However, the astronomical observations are limited by the telescope resolution and the atmospheric shimmer but the intrinsic information content of microwave spectra provides the best method for molecular identification - the other regions of the spectrum have their uses, as we shall see. [Pg.55]

Self-assembly is the spontaneous and reversible association of molecules or ions (tectons) to form larger, more complex supramolecular entities according to the intrinsic information contained in the molecules themselves. [Pg.733]

Quantitative Predictions. In this section we use the riser data to determine intrinsic activity and coking parameters (kj, Aj) in the model, and then predict MAT and FFB conversion and coke yields. Typically, we will have either the MAT or FFB activity and coke information and the task is to predict the riser performance. As the models use intrinsic parameters, it is immaterial which test information is available. The intrinsic parameters can be easily extracted by fitting the data to the appropriate reactor model. We will use the riser data as it gives the intrinsic information directly. The fitted rate parameters are summarized in Table III. The other model parameters, such as the activation energies, heats of reaction, the coke deactivation exponent, n, (also given in Table III), were estimated independently. The details of parameter estimates are described in the Appendix. [Pg.157]

Formally, we describe the state of the particle during the propagation as a coherent superposition of states, in particular of position states, that are classically mutually exclusive. A classical object will either take one or the other path for sure. A quantum object cannot be said to do that since the intrinsic information content of the quantum system is insufficient to allow such a description [Brukner 2002], Matter wave interferometers prove this experimentally. The intriguing part is that a full interference visibility can only be obtained if we exclude all possibilities of detecting, even in principle, the... [Pg.329]

Although a simple Fourier transform relationship can exist between a high spectral resolution frequency domain experiment and a time-domain quantum beat experiment, whenever the excitation and detection steps involve electromagnetic radiation of different spectral, spatial, or temporal characteristics, the intrinsic information content of time and frequency domain experiments needs not be identical. The format in which the information is presented may be more transparently interpretable in either the time or frequency domain. [Pg.656]

The basic strategy for the generation of one particular helicate therefore relies on three crucial factors (1) a judicious match between the intrinsic information borne by the metal (size, charge, polarizability, ligand-field stabilization) and the ligand strands (denticity of the binding units, steric constraints, type of donor atoms, nephelauxetic parameters) ... [Pg.314]

FIGURE 8 Classification of helicates according to their intrinsic information (reproduced by permission from Piguet et al., 1997a, 1997 American Chemical Society). [Pg.315]

The last decade has produced a number of results which indicate that the successful longevity of Huckel theory is based on the fact that this theory contains intrinsic Information about the internal connectivity in the conjugated structures, i.e. it reflects the nrighbourhood of the atoms in the conjugated systems [5,16]. Here we will be concerned with the rdationship between Huckel theory and the topology of the molecular x-network. [Pg.227]

Soil analysis has followed two broad but complementary approaches. The first and probably still most widely performed analysis relies upon measurements made on a solution after an initial solubilization or extraction operation and utilizes readily available techniques and instrumentation. The second involves some form of direct measurement on soil that requires specialist equipment and interpretation. Extraction-based approaches provide intrinsic information capable of describing field-scale spatial and temporal variability. Direct analysis tends to yield detailed compositional information at individual aggregate and subparticle scales. Overlap exists between approaches with both offering multielemen-tal capabilities at the required limits of detection. [Pg.2011]

It is important to emphasize that, in the above examples, knowledge of the PES was not required for the optimization process. The adaptive-control learning algorithm explores the available phase space and optimizes the evolution of the wave packet on the excited state PES without any prior knowledge of the surface. Thus, the intrinsic information about the excited-state dynamics of these polyatomic systems remains concealed in the detailed shape and phase of the optimized pulse. Inevitably, however, scientific curiosity, together with a desire to imder-stand how chemical reactions can be controlled, has led to pioneering studies that aim to identify the underlying rules and rationale that lead to a particular pulse shape or phase relationship that produces the optimum yield. [Pg.262]

For resonant FLN, the narrowed line spectrum contains the intrinsic information sought. To a good approximation, the observed width... [Pg.441]


See other pages where Intrinsic information is mentioned: [Pg.100]    [Pg.37]    [Pg.625]    [Pg.101]    [Pg.141]    [Pg.491]    [Pg.84]    [Pg.231]    [Pg.43]    [Pg.3286]    [Pg.47]    [Pg.303]    [Pg.3]    [Pg.592]    [Pg.323]    [Pg.253]    [Pg.193]    [Pg.8]    [Pg.8]    [Pg.410]    [Pg.421]    [Pg.422]    [Pg.215]    [Pg.440]    [Pg.445]    [Pg.17]    [Pg.1302]    [Pg.1058]    [Pg.443]    [Pg.274]    [Pg.37]    [Pg.388]   
See also in sourсe #XX -- [ Pg.410 ]




SEARCH



© 2024 chempedia.info