Big Chemical Encyclopedia

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

Articles Figures Tables About

Vibrational energy, dissipative

The elastomeric couplings generally do not have a life factor equivalent to a gear or flexible element coupling. This is further complicated by the fact liiat if the coupling is to provide damping, the dissipated vibrational energy is converted to heat, which can further shorten the life of the ele-... [Pg.398]

This obviously has a physical reason. Since condensed systems are investigated, interaction with the environment is involved in the transition. The chromophore is an open system which dissipates vibrational energy into the surrounding medium by irreversible processes. This phenomenon can be used for detecting fine structure from the time resolved measurements of photon events, by monitoring the correlations between successively emitted photons. This new technique will be reported in the second part of this article. [Pg.24]

Kahlid (2010) the novel pendulum spring base isolation element, an innovative sliding element to resist minor dynamic loads and a TLCGD to dissipate vibrational energy during the strong motion phase of an earthquake. [Pg.164]

Although it falls somewhat out of the scope of this paper and has furthermore been reviewed comprehensively recently,16 it would be remiss to overlook the exciting new work on chemicurrents. As we have seen for vibrational energy transfer, it is also observed that dissipation of chemical energy released in exothermic reactions at metal surfaces may happen adiabati-cally by creation of excited phonons or nonadiabatically by excitation of... [Pg.403]

Since anthracene dimers split to form anthracene monomers upon melting, it may be possible that if the excess vibrational energy in the hot dimer is not dissipated by solvent collisions<88> rapidly enough the bonds may rupture and monomers may be produced,... [Pg.38]

Vibrational relaxation Involves transitions between a vibrationally-excited state and the v = 0 state within a given electronic state when excited molecules collide with other species such as solvent molecules, e.g. S2(v = 3) AWr> S2(v = 0). The excess vibrational energy is dissipated as heat. [Pg.50]

Typical timescales for the process are of the order of l(T13-l(T9s in condensed phases, and the excess vibrational energy is dissipated as heat. [Pg.51]

One of the main differences between a free and an adsorbed CO molecule is that whereas the vibrational energy of the gas phase molecule can only be transferred into a photon, giving the excitation a lifetime of 30 ms, the adsorbed molecule is able to dissipate the vibrational energy into the substrate, giving the mode a lifetime in the picosecond range. This is extremely important for the energy transfer in most dynamical processes at surfaces, as in... [Pg.20]

Disappearance of an excited molecular species arising from a radiationless transition. The energy of a nonradia-tive decay is dissipated vibrationally as thermal energy. [Pg.509]

If the molecule does not disintegrate by bond breaking or ionisation after taking up the energy provided by the photon, then what happens Several other possibilities exist. The protein may dissipate the energy in the form of low-energy vibrations or rotations or it... [Pg.281]

Arlin Anderson believes that sound (vibrational energy) seems to dissipate all its energy within our 3-D world. This implies that a 4-D being can t hear (or see) us with our sound or light until the being puts his ear or eye on our level. However, if 4-D photons and phonons are possible, the being could use these to observe us. [Pg.229]

Over the course of fluorescence, which accompanies energy relaxation, the molecule can keep part of the energy it received in the form of vibrational energy of the ground state. This excess vibrational energy is dissipated by collisions or other non-radiative processes called vibrational relaxation. The emission of lower energy photons is also possible and gives rise to fluorescence in the mid infrared. [Pg.223]


See other pages where Vibrational energy, dissipative is mentioned: [Pg.397]    [Pg.237]    [Pg.25]    [Pg.538]    [Pg.397]    [Pg.237]    [Pg.25]    [Pg.538]    [Pg.3048]    [Pg.7]    [Pg.135]    [Pg.275]    [Pg.226]    [Pg.182]    [Pg.745]    [Pg.7]    [Pg.35]    [Pg.22]    [Pg.310]    [Pg.235]    [Pg.51]    [Pg.2]    [Pg.7]    [Pg.20]    [Pg.259]    [Pg.48]    [Pg.375]    [Pg.18]    [Pg.520]    [Pg.157]    [Pg.32]    [Pg.250]    [Pg.226]    [Pg.130]    [Pg.145]    [Pg.169]    [Pg.12]    [Pg.1289]    [Pg.330]    [Pg.226]   
See also in sourсe #XX -- [ Pg.234 ]




SEARCH



Energy vibrational

Vibration energy

© 2024 chempedia.info