Resonances lifting

Another problem, prevalent ia areas where severe icing conditions are met, is referred to as galloping of power lines. When ice forms on a power line, there is frequently a prevailing wiad which causes the ice to take a teardrop or airfoil shape. This foil provides an aerodynamic lift to the conductors and under certain conditions the conductors can go iato a resonant vibration such that large standing waves are created that exert enormous forces on the system. Miles of power lines and the towers along them have been destroyed by this phenomenon. 

The electron spin resonance spectrum of a free radical or coordination complex with one unpaired electron is the simplest of all forms of spectroscopy. The degeneracy of the electron spin states characterized by the quantum number, ms = 1/2, is lifted by the application of a magnetic field, and transitions between the spin levels are induced by radiation of the appropriate frequency (Figure 1.1). If unpaired electrons in radicals were indistinguishable from free electrons, the only information content of an ESR spectrum would be the integrated intensity, proportional to the radical concentration. Fortunately, an unpaired electron interacts with its environment, and the details of ESR spectra depend on the nature of those interactions. The arrow in Figure 1.1 shows the transitions induced by 0.315 cm-1 radiation. 

Move the curve vertically on the Nichols chart until it is tangent to the -f2-dB line. Read off the resonant frequency m,. (Figure 13.lift shows w, 1.1 radians per minute.)... 

He headed for the door. The nun rose. I rose. But then Fedele wheeled around as if he had reached a decision. His voice seemed to resonate with the baleful reproach of fearsome Old Testament prophets. Murderers usually have some reason for killing their victims, Filippo, even if it is only to lift their purses. Have you discovered yet why our father was stabbed to death ... 

Fourier transform ion cyclotron resonance mass spectronomy for chemical/biological toxins, distributed feedback fiber laser for SONAR arrays and the CORMORANT (demining) lift bag. 

FIGURE 9.12 (a) Calculated FE-CARS radiation profile when a HGOl excitation field overlaps with a lateral interface between a resonant and a nonresonant material. Note that the intensity along the optical axis is no longer zero due to partial lifting of the phase step by the interface. The inset shows the excitation field relative to the orientation of the interface, (b) Comparison of the calculated spectral dependence of CARS in a bulk material with a weak resonance and FE-CARS measured at an interface similar to the one considered in (a). Note the Raman-like spectral dependence of the FE-CARS signal. 

A magnetic field at the nucleus lifts the degeneracy of the m sublevels, thereby creating a splitting of the y-ray resonance of order /iH. This interaction can be observed with the Mbssbauer effect if... 

If the emitted photon hits on a system of the same nature as the one emitting, but in its ground state after that, exists a certain probability that it will be absorbed, then lifting up the system to an excited state, a phenomenon called resonant absorption of photons. 

In addition to multiple-pulse sequences that were derived from heteronuclear decoupling experiments, a number of rf sequences have been specifically developed for homonuclear Hartmann-Hahn transfer. A systematic search for phase-alternated composite 180° pulses R expanded in an MLEV-16 supercycle was reported by Glaser and Drobny (1990). Several clusters of good sequences were found for the transfer of magnetization in the offset range of 0.Av. However, substantially improved Hartmann-Hahn sequences were found after the condition that restricted R to be an exact composite 180° pulse on-resonance was lifted. For example, the GD-2 sequence is based on R = 290° 390° 290°, which is a composite 190° pulse on-resonance and is one of the best sequences based on composite pulses of the form R = (Glaser and Drobny, 1990). 

Dynamic Processes. The binding of the Hoechst molecule to the self-complementary oligonucleotide duplexes in a 1 1 ratio lifts the dyad symmetry of the duplexes so that two sets of DNA resonances are observed. This indicates that the drug is in slow exchange between the free and the bound forms. Close examination of the 2D NOE data, however, reveals the presence of chemical-ex-... 

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