BANDS OF HNO2HNO_{2}

(1) J.M. Guilmot, M. Carleer, M. Godefroid and M. Herman, submitted for publication.Author Institution: Laboratoire de Chimie Physique Mol\'eculaire, Universit\'e Libre de Bruxelles CP.160Fourier Transform infrared spectra of $HNO_{2}$ have been recorded with a Bruker IFS 120HR, at an instrumental resolution better than $0.003 cm^{-1}$. The pressure conditions of the various parent gases ($NO_{2}, NO$ and $H_{2}O$) are optimized during the experiments. The analysis of the $\nu_{1}$ band in $trans-HNO_{2}$ (1) will be reported. A very specific interaction pattern perturbing the $\nu_{1}=1$ level will be discussed. Preliminary results of the analysis of other bands in several wavelength regions will be also reported

Infrared vibrational bands in HONO

Author Institution: Laboratoire de Chimie Physique Mol\'{e}culaire, Universit\'{e} libre de BruxellesWe have used a Bruker Fourier transform interferometer IFS12OHR to record spectra at high resolution of some 16 bands of HONO between 650 and $11 000 cm^{-1}$. Different optical paths, 20 cm and 49m in a mixture of NO + $NO_{2}$ + $H_{2}O$, were used. An extensive set of rovibrational parameters was obtained, which will be presented and discussed."

THE ν4\nu_{4} FUNDAMENTAL BANDS OF TRANS AND CIS−HNO2CIS-HNO_{2}.

1: C. M. Deeley and I. M. Mills, J. Mol. Struct., 100, 199-213 (1983), 2: A. G. Nakl and R. L. Sans, J. Mol. Struct. 100, 215-221 (1983) 3: C. M. Deeley, I. M. Mills, L. O. Halonen and J. Kauppinen, Can. J. Phys. 63, 962-966 (1985).""Author Institution: Molecular Physics Division, National Institute for Standards and Technology; Laboratoire de Chimic Physique Moleculaire, Universit\'{e} Libre de BruxellesThe $\nu_{4}$ fundamental band of both the trans and the cis isomers of $HNO_{2}$ ranges in an infrared atmospheric window. The previous spectroscopic investigations reported in the literature (1-3), although accurate, present however limitations either in the range scanned or in the spectral resolution and intensity. We have refined the analysis on the basis of improved experimental conditions, both of instrumental and chemical natures. Some 1950 lines of a type are now assigned to the $\nu_{4}$ fundamental band of trans-$HNO_{2}$ and over 3100 lines of a and b-type to the $\nu_{4}$ fundamental band of $cis-HNO_{2}$. The results will be presented and relative intensity information will be discused

Systemic sclerosis and occupational risk factors: a case–control study

Aims: A case–control study was carried out between 1998 and 2000 to investigate the relation between systemic sclerosis and occupational exposure. Methods: Eighty cases of systemic sclerosis admitted consecutively to the Department of Internal Medicine at the University Hospital of Tours from 1998 to 2000 were included. For each case, two age, gender, and smoking habits matched controls hospitalised during the same period in the same department were selected. A committee of experts was set up retrospectively to assess occupational exposure. Exposure to silica dust and organic solvents (such as trichlorethylene and other chlorinated solvents, and benzene and other aromatic solvents) was investigated using semiquantitative estimates of exposure. An exposure score was calculated for each subject based on probability, intensity, daily frequency, and duration of exposure for each period of employment. The final cumulative exposure score was obtained, taking into account all periods of employment. Results: Significant associations with SS were observed for crystalline silica, trichlorethylene, chlorinated solvents, toluene, aromatic solvents, ketones, white spirit, epoxy resins, and welding fumes. Risk of SS was significantly associated with a high final cumulative exposure score of occupational exposure to crystalline silica, trichlorethylene, chlorinated solvents, welding fumes, and any types of solvents. Conclusion: Results confirm the influence of occupational risk factors in the occurrence of SS in both men and women. The link is not only with silica but also with other compounds such as solvents

Analyse des flux Doppler : classification de Saint-Bonnet

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Recommandations du Collège des enseignants de médecine vasculaire (CEMV) : analyse des flux artériels Doppler (classification de Saint-Bonnet simplifiée)

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