Natural emissions

Table 31.1 Coefficients ol absorption (ol solar radiation) and emission (natural radiation) for a metallic surface located outdoors...

O Dowd C, Jimenez JL, Bahreini R, Flagan RC, Seinfeld JH, Hameri D, Pirjola L, Kulmala M, Jennings SG, Hoffmann T (2002) Marine aerosol formation from biogenic iodine emissions. Nature 417 632... 

Further examples of energy transfer processes in assemblies involving Ir(III) polyimine derivatives, from Williams et al., are shown in Fig. 25b and c [133]. These are bimetallic assemblies containing Ir and Ru centers, either an Ir(terpy)23+ connected to a Ru(bpy)32+ via a polyphenyl bridge, Fig. 25b, or a Ru(terpy)22+ connected to an Ir(ppy)2bpy+ moiety, Fig. 25c. Energy transfer occurs in both arrays in the direction Ir->- Ru, but whereas for (b), Fig. 25, the sensitized luminescence of the Ru center upon excitation of the Ir center can be detected also at ambient temperature, in array (c) the sensitized luminescence of the Ru(II)-terpyridine complex can only be revealed at low temperatures (165 K), due to the well-known non-emissive nature of Ru(terpy)22+ at room temperature. 

The development of gas standards and calibration techniques for measurements of vehicle, aircraft and industrial emissions, natural gas, occupational exposure and air quality... 

In contrast, in the orthorhombic needles, there is only one molecule in the asymmetric unit and it has a different external shape. While the nine-membered ring at the core of this molecule is planar, one of the pentyl groups protrudes nearly vertically, as seen in Parts B and C of Fig. 10. The molecular packing involves a stair step arrangement of trimers with relatively long distances between them with the closest contact of 3.618(2) A. The absence of strong aurophilic interactions between trimers may be responsible for the non-emissive nature of this polymorph. 

Sturges, W. T., and Barrie, L. A. (1987). Lead 206/207 isotope ratios in the atmosphere of North America Tracers of American and Canadian emissions. Nature 329, 144-146. 

Although there are no industrial sources of COCIF emissions, natural emissions of COCIF from volcanoes have been predicted by equilibrium thermodynamic models [1990a]. COCIF may also be generated environmentally from the photochemical decomposition of CCI3F (CFC-11). Subsequent removal can be assumed to be effected by its reaction with 0( D) [1994], and by further photolysis (the preliminary photodissociation step has been examined by ab initio methods [677a]). Using calculated production and removal rates, an altitude profile for COCIF was calculated maximum COCIF formation was noted to occur at an altitude of about 25 km [1994]. 

Ando Y, Niwa K, YamadaN, Enomot T, Irie T, Kubota H, Ohmiya Y, Akiyama H. Firefly bioluminescence quantum yield and colour change by pH-sensitive green emission. Nature Photonics 2008 2 44-7,... 

Wigley, T., Richels, R., and Edmonds, J. A. (1996). Economic and environmental choices in the stabilization of atmospheric COj emissions. Nature 379. 

Trace metal Anthropogenic emissions Natural emissions median values Anthropogenic/national emission ratios... 

Welter S, Bmnner K, Hofstraat JW, De Cola L (2003) Electroluminescent device with reversible switching between red and green emission. Nature 421 54—57... 

Kiendler-Scharr A, Wildt J, Dal Maso M, Hohaus T, Kleist E, Mentel TF, Tillmann R, Uerlings R, Schurr U, Wahner A (2009) New particle formation in forests inhibited by isoprene emissions. Nature 461 381-384... 

Industrial emissions Non-industrial emissions Natural sources... 

McFarland EW, Tang J (2003) A photovoltaic device structure based on internal electron emission. Nature 421 616-618... 

The synthesis of several Re(I)-nitrogen donor ligand complexes have been reported and the emissive nature of their metal-ligand charge transfer excited states discussed. Examples include [Re(CO)3CIL2] (L2 = bipy, phen and their derivatives, 2,2 -bipyrazine, or 2,2 -bipyrimidine), [ Re(CO)301)2(y-2,2 -... 

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