Trans-Spec

For this work, the liquid nitrogen HPGe detector and MCA in a standard system for field measurements (Iso-Cart) was replaced by a portable HPGe detector with built-in MCA (Trans-SPEC-100). The detector is nominally 40% relative efficiency a size commonly used for field measurements. The tungsten and steel collimators are cylindrical sleeves surrounding the crystal and projecting forward. The absorbing material is 4.7 mm thick. 

The Trans-SPEC-100 detector efficiency is nominally 40% when measured according to IEEE 325, but this is for a point source at 25 cm in front of the detector. The Trans-SPEC-100 detector is nominally 6.5 cm diameter and 5 cm long. The detector will detect gamma rays on the front and sides, with some decrease at low energies on the sides due to the mounting cup (see Fig. 3),... 

Figure 4.3 TGA-FTIR A schematic diagram of a TGA-FTIR interface B (a), weight-loss curve of a plasticised PVC ( 20 mg) by TGA (b), first derivative of weight-loss curve (c), Gram-Schmidt reconstruction calculated from spectral data acquired by FTIR analysis C Thermograms , specific reconstruction for three different functional groups, which are a chemoselective record of the evolving gas (a) carbonyl (1760-1740 cm ) (b) HCl (2831-2785 cm ) (c) benzene (684-664 cm ) D spectrum obtained from the middle of the first weight-loss region. Reproduced from R. C. Wieboldt, S. R. Lowry and R. J. Rosenthal (1988) Mikrochim. Acta /, Recent Aspects of Fourier Transform Spectroscopy, Vol. 2, Proc. 6th Int. Conf Four. Trans. Spec.), pp. 179-82, by...

J. M. Chalmers and J. Wilson (1988). Mikrochim. Acta II, 109-11 Recent Aspects of Fourier Transform Spectroscopy, Vol. 3, Proc. 6th Int. Conf. Four. Trans. Spec.). 

Another case to which we can apply the principle of microscopic reversibility is the isomerization of cis- and rrans-(H20)4CrClJ and the loss of Cl- from each. This system has been studied both by careful chromatographic separation of the components20 in quenched solutions and by simultaneous multiwavelength spec-trophotometric determinations.21 The scheme is as follows, where the subscript c indicates cis, t trans, and m the monochloro complex ... 

A majority of the electron diffraction structural papers appear in a handful of journals including Acta Chem. Scand. (A). Acta Chim. (Budapest), Bull. Chem. Soc. Japan, Dokl. Akad. Nauk S.S.S.R., Inorg. Chem., J. Am. Chem. Soc., J. Chem. Phys., J.C.S. Dalton Trans., J. MoL Struct, Trans. Faraday Soc., Vestn. Mosk. Univ. Khim., Z. Naturforsch. (a), Zh. Strukt. Khim. Reviews on structural studies comprising a certain period of time (Spec. Periodic Reports) or a class of compounds or the activity of a laboratory (e. g., Kfim. Kozlem.) and others appear. A systematic collection of the electron diffraction literature along with all other gas-phase molecular structure information is carried out in the Sektion flir Strukturdokumentation of the University of Ulm. 

Since the olefinic CC double bond is trisubstituted, the relative configuration cannot be determined on the basis of the cis and trans couplings of vicinal alkene protons in the H NMR spec-trum. What is the relative configuration given the 13C NMR spectra 19 ... 

Photolysis of derivatives of (4) leads to quantitative formation of nitriles and selenium via a nitrile selenide intermediate, detected and characterized by low temperature spec-trophotometric methods. Benzo derivative (2) was slowly converted to selenium and a mixture of cis,cis, cis,trans and trans,trans isomers of 2,4-hexadienedinitriles. The cis,cis isomer is the probable kinetic product (77ACS(B)848). 

C), the s,-trans pentadiene cation 58a irreversibly rearranges to the %-cis diene cation The s-trans geometry of cations 58 has been ascertained by NMR spec-... 

Spec. Pap. 261, 17—35. Boulder Geol. Soc. of America. SchaefferJ. (1972) Comparison of the carbon-13 nuclear magnetic resonance of some solid cis- and trans-polyisoprenes. 

Smith , DeWitt JG, Hedman B, Hodgson (1994) Sulfur and chlorine -edge X-ray absorption spectroscopic studies of photographic materials. J Am Chem Soc 116 3836-3847 Sodhi RNS, Brion CE (1985a) High resolution carbon Is and valence shell electronic excitation spectra of trans-1,3-butadiene and allene studied by electron energy loss spectroscopy. J Electron Spec Rel Phen 37 1-21... 

Bauer, B. Duterage and M. Godon, Atmospheric Pressure Broadening of the 183 GHz Water Line, J. Quant Spec. Rad. Trans., 1992, 48, 629-643 ibid., 1985, 33, 167-175. H.J. Liebe, Updated Model for MMW Propagation in Moist Air Data on Oxygen and Water Absorption in the Atmosphere, Radio Sci. 1985, 20, 1069-1089. 

Fig. 17.3 Schematic of typical multiplexed NIR mission cells together with the connections to process analysis arrangement showing spec- the PC and distributed control system, trometer, multiplexer, optical fibers and trans-...

---