Energetic interaction

If dye molecules are embedded into an amorphous matrix, preferably transparent polymers, greatly and inbornogenously broadened spectral lines are observed. This broadening is caused by the energetic interaction of the dye molecules with the locally different environment in the polymer matrix. The ratio of the homogenous initial line width of the dye molecule T to the inhomogenous line width of the dye in the polymer T ranges from 1 10 to 1 10 . ... 

Dinitrogen has a dissociation energy of 941 kj/mol (225 kcal/mol) and an ionisation potential of 15.6 eV. Both values indicate that it is difficult to either cleave or oxidize N2. For reduction, electrons must be added to the lowest unoccupied molecular orbital of N2 at —7 eV. This occurs only in the presence of highly electropositive metals such as lithium. However, lithium also reacts with water. Thus, such highly energetic interactions ate unlikely to occur in the aqueous environment of the natural enzymic system. Even so, highly reducing systems have achieved some success in N2 reduction even in aqueous solvents. 

A variety of experimental techniques have been used to prepare and characterize polymer blends some of the mote important ones for estabHshing the equiHbtium-phase behavior and the energetic interactions between chain segments ate described here (3,5,28,29). 

In order to mimic the energetic interaction with the aqueous phase, the head groups were restrained by a harmonic force to their average position in each bilayer. The harmonic force constant was chosen such that the head groups could move about one carbon-carbon bond length in or out of the plane determined by the average position of the head groups. The thickness of the layer adjusted itself, under the influence of an external pressure of 1 bar applied to the system. 

C atoms in cyan, O in red, N in blue (N)-MCT C atoms in orange, O in red, N in blue) series. Hydrogen bonds are shown as dashed lines, (c) Correlation between kcat and the sugar-moiety-dipole-Glu225 electrostatic energy (electrostatic energetics). Interaction energy was... 

In the absence of energetic interaction such factor is the entropy of mixing. It can be estimated via the numbers of displacement methods of the all chains links into iw-ball with the exception of a displacement links in every chains (mN) /(N )m. From this under the Stirling s approximation we will obtain the expression for the entropy of mixing ASC in... 

Underivatized silanols can interact with bases by hydrogen-bonding or ionic interactions, although the latter are stronger energetically. Interaction with bases can be described by the following equation ... 

In conclusion, the size exclusion of macromolecnles in absence of any energetic interactions with the column packing is an... 

As a theoretical check of these ideas, Bartelteta/. (1994a) created in an SOS model a step bunch of 5 steps by initially confining them to half the lattice [in the k direction], then watching them evolve to nearly uniform spacing. There was no energetic interaction between... 

The interpretation of luminescence in minerals begins with the characterization of the luminescence centers, including the identity of the ions involved, their locations in the crystal structure, their energetic interactions, and their modes of energy transfer with each other, with other ions in the structure, or with vibrational states. 

What is theta temperature (or, the Flory temperature) What are the relative magnitudes of the excluded-volume interactions and the energetic interactions in a dilute polymer solution at its theta temperature ... 

It is called trivial because it does not require any energetic interaction between the donor and the acceptor. It is merely reabsorption of fluorescence radiation in accordance with Beer s Law and shows r 2 dependence on donor-acceptor distance. Although called trivial, it causes radiation imprisonment and can be important factor to be considered in fluorescence measurements. It may introduce error and distort emission spectrum by absorbing only that portion which overlaps its absorption spectrum. It is specially troublesome in studies on concentration quenching. 

Note at proof Recently Gaylord et al. (Polymer, 25, 1577, 1984) have shown theoretically that elastic deformation of crystalline polymers is controlled by energetic interaction rather than by entropy. 

A STOCHASTIC MODEL FOR SURFACE REACTIONS WITHOUT ENERGETIC INTERACTIONS... 

A stochastic model for surface reactions without energetic interactions 517... 

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