The line intensities for RR- and PP- sub-branch transitions in the ν5 and ν3 + v6 bands of CH3I are measured for the first time for 270 lines with 5 ≤ J ≤ 40 and 4 ≤ K ≤ 11 using a multi-pressure ...fitting method with a Voigt profile. Seven spectra have been recorded using the Bruker IFS125HR Fourier Transform Spectrometer at the AILES beamline of SOLEIL Synchrotron with a resolution of 0.002 cm-1 for pressures between 0.270 and 2.433 mbar. Line intensities are analyzed and discussed as a function of the rotational quantum numbers. On average, the accuracy of the measured data is estimated to be about 4.5% for the two bands. The measured line intensities have been used to derive the vibrational transition moment, the Herman-Wallis parameters as well as the intensities of the two bands. The values for the band strengths of the ν5 and ν3 + v6are respectively 46.47 ± 2.63 cm-2 atm-1 and 14.79 ± 1.60 cm-2 atm-1. The measured line intensities were reproduced with mean values of difference of about 8.3% and 3.8% for the ν5 and ν3 + v6 bands respectively. At pressure used in this work, analysis of the overlapped line using the Rosenkranz profile demonstrates a negligible line-mixing effect on line intensities.
•Self-broadening and self-shift coefficients have been measured for the first time in 4ν2 overtone and forbidden transitions of the 2ν4 band of NH3.•Transition dipole moments squared have been ...retrieved and analyzed for about 860 lines in the 3 µm region.•Line intensity parameters, vibrational transition moments, band intensities and Herman-Wallis coefficients have been determined for ν1, ν3, 2ν4 and 4ν2 bands.
In this work, self-broadening coefficients as well as self-shift coefficients have been measured for the first time in 4ν2 overtone of NH3 at T = 295 K using a high-resolution Fourier transform spectrometer. The spectra were analyzed with nonlinear least-squares multi-pressure fitting procedure to eight spectra of pure NH3. The results are discussed as a function of the J and K rotational quantum numbers and the branches.
The line intensities of this band as well as those of the ν1 and ν3 bands lying in the same region as the 4ν2 overtone were retrieved using the same spectra. These data together with those of 2ν4 band, subject of our previous work 1, allow us to derive the transition dipole moments squared for a total of about 760 lines which were found to exhibit strong J and K dependences. These moments were also derived for 63 lines of the ΔK = ±2, ±3 forbidden transitions of the 2ν4±2 sub-band. These dependences are mainly caused by Fermi and Coriolis interactions transferring intensities between the modes forming the 3 µm region system.
The analysis of these moments allows us to derive a consistent set of line intensity parameters such as vibrational transition moments, band intensities as well as Herman-Wallis coefficients. The derived parameters are found to be in agreement with previous data.
Using Fourier transform spectrometer, He-broadening coefficients have been measured for the first time in the P and R branches of the 2ν1 parallel band of carbonyl sulfide (OCS). The measurements ...have been performed at room temperature for rotational quantum number up to J = 70. A total of 131 lines were measured using a nonlinear least squares multi-pressure spectrum fitting procedure. Since the measurements have been performed using different values of OCS pressures, we have also retrieved line intensities of the ro-vibrational lines of the same branches. The fits were performed using the Voigt profile which leads to a precise determination of these spectroscopic parameters.
From line intensities, we have determined vibrational transition moment, band intensity as well as Herman-Wallis parameters for the 2ν1 band. The results have been discussed as a function of the rotational quantum number and compared to previous data.
The line-mixing effect on broadening coefficients was also analyzed showing a negligible influence.
•He-broadening have been measured for the first time for 131 lines in the 2ν1 of OCS.•The results have been discussed as a function of J and K and branch.•Line intensities, vibrational transition moment, band intensity, and Herman-Wallis parameters have been determined.•The line-mixing effect on broadening coefficients was analyzed.
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•Fourier transform spectroscopy of the 2ν4 band of NH3.•Line intensities and a first measurements of self-broadening and shift coefficients.•J and K dependences of the self-broadening ...coefficients have been observed and modeled.
Absolute line intensities and a first determination of self-broadening and shift coefficients are presented here, deduced from room temperature measurements for 302 rovibrational lines of NH3 in the 2ν4 band, using Fourier transform infrared spectroscopy. These lines, ranging from 1 ≤ J ≤ 11 to 0 ≤ K ≤ 11, are located in the 3060–3580 cm−1 spectral range. The lines were fitted with a single spectrum non-linear least squares fitting procedure. The absence of signature in the residuals suggests that the Voigt profile is well suited to fit the experimental line shapes without the need of taking into account line mixing effects, in the pressure range used. Average absolute accuracies of the measurements are estimated to ±4% for line intensities and self-broadening coefficients and to ±13% for self-shift coefficients. The J and K dependences of the self-broadening coefficients have been observed and modeled using an empirical polynomial expression. The results are compared with previous experimental and calculated data. Our absolute line intensities, S0, are in good agreement with previous work and HITRAN2016 database, but with a reduced uncertainty. The self-broadening coefficients, γ0, as well as the pressure shift coefficients, δ0, are in reasonable agreement with those reported for various vibrational bands in the 3 µm spectral region, which indicates that no obvious vibrational dependence was observed. For shift coefficients, it should be noted that this is not the case in many studies which put in evidence a large dependence with vibrational excitation. This study complements the existing line parameters in the 3 µm spectral region, essential for the analysis of atmospheric spectra. For this purpose, the complete list of measurements is provided as supplementary material.
Acute pancreatitis from mumps in adulthood Maaroufi, N.; ELouaer, M. A.; Abid, Z. ...
Journal africain d'hépato-gastroentérologie,
06/2016, Volume:
10, Issue:
2
Journal Article
Mumps is a viral infection primarily affecting the salivary glands. Although disease is usually mild about 10- 15% of patients develop pancreatitis. Orchitis, meningitis, deafness are other ...complications of mumps. Acute pancreatitis is a complication which mainly affects children who then usually acquire permanent immunity. We report the case of a woman with acute pancreatitis caused by mumps infection in adulthood.
Case report
A 37-year-old woman developed mild acute pancreatitis caused by infection with mumps. Acute pancreatitis was diagnosed by the elevation of amylase and lipase as well as by swelling of the pancreatic head visualized by abdominal computed tomography. The abdominal symptoms resolved soon after symptomatic treatment. As the swelling of the right and left parotids decreased, serum amylase levels also gradually normalized.
Conclusion
We report a case of acute pancreatitis caused by mumps infection in an adult. Such infection should be considered a possible though rare cause of acute pancreatitis inadulthood.
Industrial wastes were identified as potential high temperature (up to 800 °C) TES materials for application in the Hybrid solar tower power plant with decoupled combined cycles (HSTPPDCC) scheme. ...These wastes can be categorized as follows: (1) Slags from the metallurgical industry, and (2) Coal power plant industry solid wastes. So primarily, the selection methodology of these identified wastes is presented. Then, updated data about the Moroccan generation of these wastes is exhibited and targeted local industries are identified. In the second part of this work, four Moroccan representative solid wastes were considered to validate the selection methodology, and they are namely: Induction furnace slags (IFS) gathered from a local metallurgical industry which were experimentally investigated in a previous work; and other three solid wastes gathered from the local coal power plant industry (i.e. Coal fly ashes (CFA), Coal bottom ashes (CBA), and Coal bottom clinker (CBC)). Finally, a laboratory experimental investigation was conducted only on these three later wastes in order to assess their TES potential up to 800 °C, as IFS was already investigated in a previous work and its obtained results were reported in this paper for comparison. Thus, their thermo-physical and chemical properties were evaluated, as well as their thermal stability up to 800 °C. The obtained results are promising as all the investigated materials demonstrated good thermal energy storage properties for application in solar tower power plant (up to 800 °C at least).
An induction furnace is an electric furnace in which ferrous metal scrap and fluxes (e.g. silica, limestone) are melted using an electromagnetic field to produce steel or cast iron. This ...metallurgical process is accompanied by the generation of large amounts of wastes called slags, which are composed mainly of a non-metallic part as well as a small metallic part. At the end of the melting process the slags layer is removed from the furnace top, then it is air-cooled and stored prior to discharge. While blast furnace slags (BFS), electric arc furnace slags (EAFS), and ladle furnace slags (LFS) were characterized in earlier works for thermal energy storage up to 1000°C, the induction furnace slags (IFS) have never been investigated for this application. Thus the aim of this paper is the thermophysical and chemical characterization of IFS to be used as high-temperature thermal energy storage materials (around 1000°C) in packed bed TES system. Chemical investigation of this metallurgical waste was conducted using: Energy dispersive X-ray spectroscopy (EDS) coupled with the Scanning electron microscopy (SEM), and infrared spectroscopy (FTIR). Their thermal heat capacity was measured using Modulated differential scanning calorimetry (MDSC), while their bulk density was determined using the pycnometer method. It was found that they have a good specific heat capacity (Cp ≈ 700J/kg°C) and a good bulk density (ρ≈ 2583kg/m3). The thermal stability of the IFS was assessed using thermogravimetric analysis (TGA) from room temperature up to 1000°C; Three cycles of heating/cooling were applied on the IFS and their thermal stability was proved at the end of the first cycle. The obtained results suggest that IFS are good candidate materials for high-temperature thermal energy storage application (up to 1000°C).
•Induction furnace slags (IFS) are good candidates for high temperature (up to 1000°C) TES application in solar tower plants.•IFS have good thermophysical properties: Cp ≈ 700J/kg°C, and ρ≈ 2583kg/m3.•IFS are thermally stable up to 1000°C.•IFS have high energy density per volume: 208kWh/m3 at 400°C.•Valorization of IFS wastes into high temperature TES materials.
A packed bed of rocks with air as heat transfer fluid can be considered as a cost effective storage system, as it enhances the dispatchability of the concentrated solar power plant at lower costs. ...However, the identification of suitable rocks to be used as a storage medium requires a prior experimental characterization, since the studies published about the behaviour of rocks at high temperatures are scarce in literature. This work aims to investigate the potential of gneiss rock as a candidate storage material in solar power plants. Thus, thermal stability of two varieties of gneiss rock has been studied at temperatures up to 1000°C during heating and cooling by thermogravimetric and differential thermal analyzer (TG/DTA). The influence of temperature on specific heat capacity, thermal diffusivity and thermal conductivity has been analyzed. Furthermore, the chemical composition and crystalline phases have been identified by X-ray fluorescence and X-ray diffraction, respectively. The obtained results proved the potential of this type of rocks in terms of high thermal capacities, high density and good thermal stability up to 550°C.
•Gneiss rock gathered from Moroccan regions is suggested as a thermal energy storage material.•Gneiss rock to be used in a packed bed storage system with air as the heat transfer fluid.•The chemical and structural composition of gneiss rock has been analyzed.•The most relevant thermophysical properties of gneiss have been characterized as a function of temperature.•Gneiss rock has a great potential as a sensible heat storage medium up to 550°C.
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