Myelodysplastic syndrome and extracapillary glomerulonephritis: is there a link?

Introduction: The association of myelodysplastic syndrome and extracapillary glomerulonephritis is exceptional. Only two other cases have been reported.Reported case: A 52-year-old patient with a history of myelodysplastic syndrome developed rapidly progressive glomerulonephritis. Renal biopsy identified extracapillary glomerulonephritis.Discussion: The association of myelodysplastic syndrome with glomerulopathy is rare and often regarded as fortuitous. Only a few cases are described in literature on the subject. A relationship between the two diseases is possible but the causal link between these two diseases remains unknown.Conclusion: The notion that myelodysplastic syndrome may be associated with various glomerular nephropathies involves looking for renal disease in this haematologic disorder

Electron-impact ionization of neon ions (q=4-8)

Absolute cross section measurements for electron-impact single ionization of Ne-q+ (q = 4-8) ions and for double ionization of Ne5+ and Ne6+ are reported. The animated crossed-beams method has been applied. The measurements cover the energy range from threshold to several keV. The Ne4+ and Ne6+ ion beams are found to contain an important population of ions formed in metastable states. For single ionization, results are in overall good agreement with direct ionization theoretical predictions, when available. Excitation-autoionization is observed in the ionization threshold region for Ne4+ and in the K-L transition energy region for Ne6+ and Ne7+. Double ionization of Ne5+ and Ne6+ is found to be dominated by K-shell ionization followed by autoionization

A Crossed Electron-ion Beam Setup for Ionization Experiments

A new crossed beam experimental setup has been built for the study of electron impact ionization of multiply charged ions. The animated beam method has been applied. Sweeping irregularities and fluctuations of the beam intensities are taken into account. The electron gun is swept mechanically by means of a stepping motor. The energy range extends continuously from 20 eV to 6 keV. Results are reported for single and double ionization of Ar8+. The luminosity is seen to be of the order of 5 X 10(20) Hz/cm(2). The global performance of the present apparatus is compared with the one of similar devices

Electron impact ionization of argon ions (q=4-11)

Absolute cross sections for electron impact ionization of multiply charged argon ions (Arq+) have been measured in an animated crossed electron-ion beam experiment. Results are reported for single ionization (SI) (q = 4-6, 8, 10 and 11) ions and for double ionization (DI) (q = 5-11). The measurements cover the energy range from threshold to about 6000 eV The direct process is seen to dominate SI for q = 8, 10 and 11. For charge states 4-6, excitation-autoionization processes are seen to largely contribute to the ionization signal. In addition, metastable states are unambiguously identified for Ar5+ and Ar6+. Ionization-autoionization (IA) from the L shell accounts predominantly for DI of Arq+ (q = 5, 6). For charge states 7-11 direct DI is found to decrease strongly with respect to IA from the K shell

Electron impact ionization of nickel multiply-charged ions

Absolute cross-section measurements are reported for electron impact ionization of Ni12+ and Ni14+ in an energy range from threshold to about 5.5 keV. For single ionization, data show that the first observed threshold corresponds to the metastable state [Ne]3s(2)3p(4) (1)So which is located 12 eV above the ground state. Excitation-autoionization is seen to play a dominant role for this reaction in the whole energy range. Double ionization is seen to be dominated by L-shell ionization followed by total autoionization. For Ni12+, triple ionization is found to be two orders of magnitude lower than double ionization and is attributed to direct ionization only

Electron-impact Ionization of Krypton Ions (q=8-13)

Absolute cross sections for electron impact single ionization of Kr10+ and Kr11+ ions and double ionization of Kr-q+ (q = 8-13) have been measured in an animated crossed-electron ion beam experiment. Ionization thresholds corresponding to particular electron pairs and inner-shell electron ejection are estimated from a structure Hartree-Fock calculation. For double ionization, results show that, along the homonuclear sequence, direct double ionization is progressively overcome due to the increasing relative importance of direct L-shell ionization followed by autoionization. The presence of ions in metastable states is observed for Kr8+ and Kr9+ contributing to direct and indirect processes