Long-wave

The long-wave absorption most likely results from a chaige-transfer band See Coleman, L. E. 7. Org. Chem. 1956, 21, 1193. 

PMMA-impregnated sol—gel-derived siUca gels have also been examined (54). Long-wave uv illumination was employed in addition to benzoyl peroxide for PMMA polymerization. This method prohibited the degradation of the siUca xerogel from moisture adsorption and desorption. Overall the material behaved more like bulk PMMA than bulk siUca, with the exception of hardness. 

Long-wave radiation (infrared radiation) is in the range of 0.8-100 i.m, short-wave radiation (visible as light) is in the range 0.4-0.8 [Lin, and solar radiation is in the range 0.3-3.0 juim. 

In the simulation, the time dependency of the energy release of such sources is defined in so-called schedules. The heat sources transfer energy to the room air by convection and to the surfaces by long-wave radiation. In principle, heat sources can be modeled by two kinds of parameterization ... 

A fictive sky temperature, dependent on ambient temperature, emissivity, and cloudiness, is introduced to account for the long-wave radiative heat exchange between the building envelope and the sky. 

Slmn. iml/nr long wave raJutton on vLufjce node (wjII gam WG)... 

After the dipped or sprayed chromatogram has been dried in a stream of cold air long-wave UV light (2 = 365 nm) reveals fluorescent yellow zones (flavonoids). Sterigmatocystine, which can be detected without derivatization on account of its red intrinsic fluorescence (detection limit 0.5 pg), also fluoresces pale yellow after being heated to 80°C [9] or 100°C [13] for 10 min on the other hand, citrinine, zearalenone and vomitoxin fluoresce blue. 

Detection and result The chromatogram was freed from mobile phase and dipped for 1 s in solution I and after drying for 1 min in a stream of cold air it was dipped in a solution of liquid paraffin — -hexane (1 + 2) in order to stabilize and increase the intensity of fluorescence by a factor of 1.5—2.5. The derivatives which were pale yellow in daylight after drying fluoresce pale blue to turquoise in long-wave... 

Primary and secondary amines and phenols generally produce yellow to reddish-orange zones (serotonin violet) on a pale yellow background, under long-wave-... 

Yellow-green fluorescent zones are formed on a dark background in long-wave-length UV light (2 = 365 nm). 

Glycine (hRf 20 — 25), alanine (hRf 35 — 40), valine (hRf 55 — 60) and leucine (fiRf 65 — 70) appeared as blue-green fluorescent chromatogram zones in long-wave-... 

Protonation of heteroaromatic compounds is known to produce only small shifts ( 6 mp,) of the long-wave length band present in the case... 

About 51 percent of solar energy incident at the top of the atmosphere reaches Earth s surface. Energetic solar ultraviolet radiation affects the chemistry of the atmosphere, especially the stratosphere where, through a series of photochemical reactions, it is responsible for the creation of ozone (O,). Ozone in the stratosphere absorbs most of the short-wave solar ultraviolet (UV) radiation, and some long-wave infrared radiation. Water vapor and carbon dioxide in the troposphere also absorb infrared radiation. 

Considerable energy is radiated back from Earth s surface into space as long-wave infrared radiation. The atmosphere absorbs some of this infrared radiation, preventing its loss to space. This trapping is sometimes referred to as the Greenhouse Effect. ... 

For quantitative measurements peak heights (expressed in mm) are usually measured of the long-wave peak satellite of either the second- or fourth-order derivative curves, or for the short-wave peak satellite of the same curves. This is illustrated in Fig. 17.16(a) for a second-order derivative DL is the long-wave peak height and Ds the short-wave peak height. Some workers11 have preferred to use the peak tangent baseline (DB) or the derivative peak zero (Dz) measurements [Fig. 17.16(h)]. 

Now record the second derivative spectrum of the Actifed solution, determine the long-wave peak heights for both components, and by comparison with the calibration plots of the individual components, deduce their proportions in the tablets. 

Electronic spectra of these complexes, as Fig. 18 shows, contain two new bands, one of which (long wave) is due to the acceptor absorption and the other... 

Let us review the calculation of the number of electrons in successive Brillouin zones. The calculation has as its starting point a distribution of free electrons. In a volume V to which the electrons are restricted the most stable pair of electrons occupies the lowest energy levels, with nearly zero kinetic energy, and correspondingly long wave-lengths. As the number of electrons... 

The long-wave-length absorption band of a dye such as benzaurin or Dobner s violet has been associated with resonance of the type... 

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