Die Juden in Worms : ein Vortrag

gehalten von Benas Levy

Aus Vergangenheit und Gegenwart der Israelitischen Gemeinde Worms

von Samson Rothschild

Aus Vergangenheit und Gegenwart der Israelitischen Gemeinde Worms

von Samson Rothschild

Nafshot tsadiḳim : sechzig Epitaphien von Grabsteinen des israelitischen Friedhofes zu Worms : regressiv bis zum Jahre 905 übl. Zeitr. ; nebst biographischen Skizzen und einem Anhang ; mit einer Abbildung der äußern und innern Ansicht der Raschi-Kapelle zu Worms

von L. Lewysohn

Die Zerstörung der Stadt Worms im Jahre 1689

... dargest. von F. Soldan

Genealogical History of the family of de Worms

compiled by Elias Ullmann

Familien-Register und Stammtafel des Michael Isaac Bing und seiner Nachkommen : nebst beigef. Testamente seiner Enkelin Gütche Worms geb. Mendler-Oetingen, die Stiftung eines Brautvermächtnisses zu Gunsten ihrer Anverwandten betreffend

zsgest. von Elias Ullmann

Die Juden in Worms : ein Beitrag zur Geschichte der Juden in den Rheingegenden

von Moses Mannheimer. Mit einem Vorw. von J. W. Jost

Minhāgîm : fir gantz Aškenaz, Polin, Mehrin we-Behmn bezonderz fir F"f de-Main, Maintz, Worms, Bamberg, Franken Šwaben, Elzas und Šwaitz

Digitalisat der Ausg. Rödelheim, [circa] 1820

Die Raschikapelle in Worms a. Rh.

J. Kiefer

Die Urkunden für die Juden von Speyer 1090 und Worms 1157

Sara Schiffmann

Rechts oder links? Ein Wort zu seiner Zeit: Es sind schon viele hundert Jahre her, da saßen einmal die deutschen Fürsten zu Worms am Rhein im Kaisersaal beim frohen Gelage ...

Boberach: Die Maiaufstände haben Preußen vor eine Bewährungsprobe gestellt, die erfolgreich bestanden wurde. Die Demokraten müssen bei den Landtagswahlen die Quittung dafür erhalten

Radiochemical Determination of Rare Earth Elements in Proton-Irradiated Lead–Bismuth Eutectic

Various types of proton-irradiated lead–bismuth eutectic (LBE) samples from the MEGAPIE prototype spallation target were analyzed concerning their content of 148Gd, 173Lu, and 146Pm by use of α- and γ-spectrometry. A radiochemical separation procedure was developed to isolate the lanthanide fraction and to prepare thin samples for α-ray measurement. The results prove a substantial depletion of these three elements in bulk samples, whereas accumulation on the LBE/steel-interfaces was observed. The amount of material accumulated on surfaces was roughly estimated by relating the values measured on the sample surfaces to the total surface of the inner target walls. The amount of 148Gd, 173Lu, and 146Pm was then quantified by summing up the contributions from every sample type. The results show a reasonable agreement with theoretical predictions. The obtained results are of utmost importance for the evaluation of the performance of high-power spallation targets, especially concerning the residual nuclide production, the physicochemical behavior of the produced radionuclides during operation, and in terms of an intermediate or final disposal.

Radiochemical determination of 129I and 36Cl in MEGAPIE, a proton irradiated lead-bismuth eutectic spallation target

The concentrations of the long-lived nuclear reaction products 129I and 36Cl have been measured in samples from the MEGAPIE liquid metal spallation target. Samples from the bulk target material (lead-bismuth eutectic, LBE), from the interface of the metal free surface with the cover gas, from LBE/steel interfaces and from noble metal absorber foils installed in the cover gas system were analysed using Accelerator Mass Spectrometry at the Laboratory of Ion beam Physics at ETH Zürich. The major part of 129I and 36Cl was found accumulated on the interfaces, particularly at the interface of LBE and the steel walls of the target container, while bulk LBE samples contain only a minor fraction of these nuclides. Both nuclides were also detected on the absorber foils to a certain extent (≪ 1% of the total amount). The latter number is negligible concerning the radio-hazard of the irradiated target material; however it indicates a certain affinity of the absorber foils for halogens, thus proving the principle of using noble metal foils for catching these volatile radionuclides. The total amounts of 129I and 36Cl in the target were estimated from the analytical data by averaging within the different groups of samples and summing up these averages over the total target. This estimation could account for about half of the amount of 129I and 36Cl predicted to be produced using nuclear physics modelling codes for both nuclides. The significance of the results and the associated uncertainties are discussed.

Evaluation of the Morphological Characteristics of Laser-Irradiated Dentin

OBJECTIVE The aim of this study was to investigate the effect of different energy settings of Er:YAG laser irradiation on dentin surface morphology with respect to the number of opened dentinal tubules. BACKGROUND DATA An ideally prepared dentin surface with opened dentinal tubules is a prerequisite for adhesive fixation. No study, however, has yet compared the numbers of opened dentinal tubules with regard to statistical differences. METHODS Conventional preparations using a bur with or without additional acid etching acted as control groups. Dentin specimens were prepared from human third molars and randomly divided into eight groups according to the energy settings of the laser (1, 1.5, 4, 6, 7.5, and 8 W) and two controls (bur and bur plus acid etching). After surface preparation, dentin surfaces were analyzed with a scanning electron microscope, and the number of opened dentinal tubules in a defined area was counted. RESULTS The control groups showed smooth surfaces with (bur plus acid etching) and without opened dentinal tubules (bur), whereas all laser-irradiated surfaces showed rough surfaces. Using the energy setting of 4 W resulted in significantly more opened dentinal tubules than the conventional preparation technique using the bur with additional acid etching. In contrast, the energy setting of 8 W showed significantly fewer opened dentinal tubules, and also exhibited signs of thermal damage. CONCLUSIONS The Er:YAG laser with an energy setting of 4 W generates a dentin surface with opened dentinal tubules, a prerequisite for adhesive fixation.