Die Verdampfungswärme des Wassers und das spezifische Volumen von Sattdampf im Bereich von 100 bis 150 at

Zusammenfassung Durch die vorliegende kalorimetrische Bestimmung der Verdampfungsw?rmer des Wassers und des spezifischen Volumensv″ von ges?ttigtem Wasserdampf werden unsere früheren, bis 101 at reichenden Arbeiten bis zum Druck von 150 kg/cm² fortgesetzt. Das Versuchsverfahren ist beibehalten; die verschiedenen an der Versuchseinrichtung vorgenommenen Verbesserungen werden beschrieben. Der Auswertung zugrunde liegen 17 Versuchsreihen mit 56 Hauptversuchen und 2 Reihen mit 8 Hilfsversuchen zur Verlustbestimmung. Die Versuchsergebnisse beheben die auch noch in den neuesten Dampftafeln vorhandene Unsicherheit der Werte vonr undv″, deren H?chstbetrag in unserem Versuchsbereich ±2% ausmacht. Mitteilung aus der Physikalisch-Technischen Reichsanstalt     

Experimentelle Untersuchung des magnetischen Wechselfeldes im Luftspalt von massivem Eisen

Ohne ZusammenfassungDie vorliegende Arbeit wurde auf Anregung von Herrn Professor Dr.-Ing. Hilpert im Elektrotechnischen Institut der Technischen Hochschule Breslau durchgeführt. Es ist mir eine angenehme Pflicht, auch an dieser Stelle Herrn Professor Dr.-Ing. Hilpert und Herrn Privatdozent Dr.-Ing. Büge für überlassung der Mittel des Instituts und fördernde Ratschläge meinen besten Dank auszusprechen.     

Correction to: Development and validation of a new friction model for cutting processes

The authors wish to thank the German Research Foundation (DFG) for funding the research within the project "Modelling of broaching processes by multi-     

GILT Expression in Human Melanoma Cells Enhances Generation of Antigenic Peptides for HLA Class II-Mediated Immune Recognition

Melanoma is an aggressive skin cancer that has become increasingly prevalent in western populations. Current treatments such as surgery, chemotherapy, and high-dose radiation have had limited success, often failing to treat late stage, metastatic melanoma. Alternative strategies such as immunotherapies have been successful in treating a small percentage of patients with metastatic disease, although these treatments to date have not been proven to enhance overall survival. Several melanoma antigens (Ags) proposed as targets for immunotherapeutics include tyrosinase, NY-ESO-1, gp-100, and Mart-1, all of which contain both human leukocyte antigen (HLA) class I and class II-restricted epitopes necessary for immune recognition. We have previously shown that an enzyme, gamma-IFN-inducible lysosomal thiol-reductase (GILT), is abundantly expressed in professional Ag presenting cells (APCs), but absent or expressed at greatly reduced levels in many human melanomas. In the current study, we report that increased GILT expression generates a greater pool of antigenic peptides in melanoma cells for enhanced CD4+ T cell recognition. Our results suggest that the induction of GILT in human melanoma cells could aid in the development of a novel whole-cell vaccine for the enhancement of immune recognition of metastatic melanoma.     

Experimental Investigation and Thermodynamic Calculation of the Titanium–Silicon–Carbon System

The 1100°C isothermal section and the isopleths at 5, 10, and 15 at.% C in the Ti–Si–C system were determined by DTA and XRD methods. Five invariant reactions (L (liquid) = Si + SiC + TiSi₂ at 1330°C, L = TiSi + TiSi₂+ Ti₅Si₃C _x at 1485°C, L + Ti₅Si₃C _x = Ti₃SiC₂+ TiSi₂ at 1485°C, L + Ti₃SiC₂= TiSi₂+ SiC at 1473°C, and L + TiC = bcc-(Ti) + Ti₅Si₃C _x at 1341°C) were observed. The transition temperature for L + TiC = Ti₃SiC₂+ SiC was measured by the Pirani technique. Optimized thermodynamic parameters for the Ti–Si–C system were then obtained by means of the CALPHAD (calculation of phase diagrams) method applied to the present experimental results and reliable literature data. The calculations satisfactorily account for most of the experimental data.     

Yttrium Silicate Coatings on Chemical Vapor Deposition-SiC-Precoated C/C–SiC: Thermodynamic Assessment and High-Temperature Investigation

Yttrium silicates are promising materials for improved oxidation and erosion protection for carbon fiber-reinforced composites. A two-layer coating system of low-pressure plasma-sprayed yttrium silicate on chemical vapor deposition-SiC-precoated C/C–SiC was tested under atmospheric re-entry conditions simulated within a plasma wind tunnel test facility. The thermal expansion behavior of Y₂SiO₅ and Y₂Si₂O₇ was investigated. The chemical compatibility with and without increasing oxygen partial pressure at the interface of the two-layer system was calculated by the CALPHAD method. The calculations were compared with experimental results. Furthermore, a thermodynamic explanation is presented to understand and predict the observed coating failure mechanism, identified as blister formation.     

XANES study of polyaniline-V2O5 and sulfonated polyaniline-V2O5 nanocomposites

In this work, two materials for secondary lithium battery cathodes formed by polyaniline-V₂O₅ and sulfonated polyaniline-V₂O₅, which have a higher charge capacity than the V₂O₅ xerogel, were synthesized. X-ray absorption and Fourier transform infrared spectroscopies were employed to analyze the short-range interactions in these materials. Based on these experiments, it was possible to observe significant differences in the symmetry of the VO₅ units, and this was attributed to the intimate contact between V₂O₅ and the polymers, and to some flexibility of the VO₅ square pyramids due to the low range order of the nanocomposites.