Einfluß unterschiedlicher Chromgehalte auf die Eigenschaften des nichtmagnetisierbaren aushärtbaren Stahles X 45 MnNiCrV 13 7 6

Ermittlung der Härte, der Kennwerte im Zugversuch, der Kerbschlagzähigkeit und des Gefüges an lösungsgeglühten und anschließend bei 550 bis 800 °C bis zu 128 h ausgelagerten Proben aus nichtmagnetisierbarem Stahl mit rd. 0,02 oder 0,45% C, 13% Mn, 0,2 bis 10,2% Cr, 6,5% Ni und 0 oder 0,8% V. Folgerungen über die mechanischen Eigenschaften und das Aushärtungsverhalten.     

Polarographische Bestimmung von Schwefelverbindungen nebeneinander in wäßriger Lösung

Polarographische Bestimmung von Sulfat, Sulfit, Thiosulfat, Trithionat, Sulfid und Polysulfid im Gemisch. Überprüfung der Arbeitsvorschriften und Bestimmung der Genauigkeit und Bestimmungsgrenzen mit Modellanalysen. Untersuchung der Auslaugewässer von Hochofenschlacken.     

Simultaneous Immobilization of Bioactives During 3D Powder Printing of Bioceramic Drug‐Release Matrices

The combination of a degradable bioceramic scaffold and a drug‐delivery system in a single low temperature fabrication step is attractive for the reconstruction of bone defects. The production of calcium phosphate scaffolds by a multijet 3D printing system enables localized deposition of biologically active drugs and proteins with a spatial resolution of approximately 300 µm. In addition, homogeneous or localized polymer incorporation during printing with HPMC or chitosan hydrochloride allows the drug release kinetics to be retarded from first to zero order over a period of 3–4 days with release rates in the range 0.68%–0.96% h^?1. The reduction in biological activity of vancomycin, heparin, and rhBMP‐2 following spraying through the ink jet nozzles is between 1% and 18%. For vancomycin, a further loss of biological activity following incorporation into a cement and subsequent in vitro release is 11%. While previously acknowledged as theoretically feasible, is its shown for the first time that bone grafts with simultaneous geometry, localized organic bioactive loading, and localized diffusion control are a physical reality. This breakthrough offers a new future for patients by providing the required material function to match patient bone health status, site of repair, and age.     

Extraversion and its positive emotional core—Further evidence from neuroscience.

Converging evidence from self-report data demonstrated that extraversion and dispositional positive affect are systematically related. Several authors therefore considered positive affect as the conceptual core of extraversion. Because the ventral striatum is regarded as a core region in the physiological basis of extraversion, the present study examines the importance of this neural substrate with a special focus on positive affect. Baseline cerebral blood flow was measured in 38 participants and regressed to the extraversion and dispositional positive affect scales. Partial correlational and indirect-effects analyses indicated that striatal blood flow was no longer associated with extraversion when positive affect was statistically controlled. In contrast, when extraversion was statistically controlled, striatal blood flow was still associated with positive affect. This finding suggests that the striatal region is not a biological basis of extraversion per se. Rather, this region sustains positive affect, which in turn appears to be a core feature of extraversion. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Testing for predicted patterns: When interest in the whole is greater than in some of its parts.

This article provides a general rationale and step-by-step procedures for statistically assessing a theory-based or predicted pattern in a set of K?>?2 means. A coherent hypothesis-testing strategy that incorporates Type I error and power considerations is an integral part of the process. Some specific advantages that are conferred by predicted pattern testing, relative to commonly adopted alternatives, include its (a) scientific parsimony; (b) precision, with respect to getting to the heart of a researcher's hypothesis; (c) sensitivity, as reflected by greater statistical power and which includes applicability to experimental factors associated with small "piecewise" effects; and (d) ability to lend varying degrees of statistical support to a researcher's hypothesis. Both a hypothetical example and a published application of predicted pattern testing are provided to demonstrate its use and usefulness. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Feldversuche mit dem Brückenklappverfahren

Field Tests with the Balanced Lift Method As a counterpart to the lowering arch construction method the “balanced lift method” for bridge girders is suggested. The bridge girders can be built in combination with the pier using climbing forms in a vertical position. Therefore, during the production no bending stresses are generated in the girders. Thus, the balanced lift method allows lower costs and a shorter construction time than the traditional balanced cantilever method. The span of the bridge girders is reduced by the compression struts or tension ties which results in substantial savings in construction materials compared to the balanced cantilever method for bridge construction. The proposed method will be especially advantageous for bridges with high piers. The range of the span length for the application of the balanced lift method ranges between 50 m and 250 m.