Software for Raceway Design and Calculation of Cable Installation Forces

The pull tension and sidewall bearing pressure experienced by cables during installation determine the lengths of cable installed and splices needed, if any, and influence the cost of installation. For the first time, personal computer software exists which not only estimates these forces, but enhances confidence in the results by showing the user his raceway on the CRT in any of the four (4) standard views. Typically, the installer /estimator uses the estimated forces to determine what kind of pull he can expect - easy or hard - and to consequently exercise any options he may have in the design/bid/installation of the system. He can then quickly input alternate raceways or cable changes, and rerun the program. Twenty-five (25) help screens and ten (10) data libraries aid the user.     

Editorial

This special issue is devoted to a study of psychological perspectives of aging and gerontology. The present issue covers topics and themes that relate broadly to the perceptions and psychological functioning of older adults: Their motivations, their happiness and activities, their personal meanings of life and quality of life concerns, their sexual expressions, their television viewing, and how all these relate to successful aging. Also included are perspective-taking papers on problems of stress and depression and how these relate to the psychological health and welfare of older adults. The reader will find a rich assortment of research-based gerontology papers attesting to the vigorous activity of Canadian psychologists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Disk-Elektrophorese der wasserl?slichen Proteine einiger Weizensorten

Zusammenfassung Die beschriebene Methode erlaubt eine zuverlässige Erkennung der Sorte Kranich aus insgesamt 9 untersuchten Weizensorten innerhalb von 5 Stunden.

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Disc-electrophoresis of the water-soluble proteins of some wheat varieties

Summary The method described allows a reliable detection of the variety Kranich out of 9 varieties investigated within 5 h.

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Fräulein D. Schweiger danken wir für die ausgezeichnete Mitarbeit

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Die untersuchten Mehle wurden uns freundlicherweise von Herrn Dr. H. D. Jodlbauer, Hameln, zur Verfügung gestellt     

Reduced Sensitivity RDX Obtained From Bachmann RDX

In recent years much interest has been generated in a quality of reduced sensitivity RDX (RS‐RDX), like I‐RDX^® which, when incorporated in cast cure and even pressable plastic bonded explosives (PBX compositions), can confer reduced shock sensitivity as measured through gap test. At crystal level, lot of work has been done to try to determine which property or properties may explain the behaviour of the corresponding cast PBX composition. But up to now, and despite an international inter‐laboratory comparison (Round Robin) of seven lots of RDX from five different manufacturers conducted from 2003 to 2005, even if some techniques lead to interesting results, there is no dedicated specification to apply to RS‐RDX. This quality (I‐RDX^®) has proved to retain its low sensitivity even after ageing, which does not seem to be the case for standard RDX produced by the Bachmann process (when re‐crystallized under I‐RDX conditions in order to obtain RS‐RDX). It has been shown that the higher sensitivity of RDX produced by the Bachmann process, or the evolution of sensitivity after ageing of RS‐RDX produced from Bachmann RDX may be linked to the presence of octogen (HMX) during the crystallization process. In order to check such hypothesis, low HMX content RDX produced by the Bachmann process has been prepared and evaluated in cast PBX composition (PBX N 109). Results of the characterization of such quality of RDX and its evaluation in cast PBX composition as well as ageing behaviour are presented and discussed; there are indications that removal of HMX from Bachmann RDX may lead to RS‐RDX, which retains its RS character even after ageing.     

Fast 3D imaging of giant unilamellar vesicles using reflected light-sheet microscopy with single molecule sensitivity

Observation of highly dynamic processes inside living cells at the single molecule level is key for a better understanding of biological systems. However, imaging of single molecules in living cells is usually limited by the spatial and temporal resolution, photobleaching and the signal-to-background ratio. To overcome these limitations, light-sheet microscopes with thin selective plane illumination, for example, in a reflected geometry with a high numerical aperture imaging objective, have been developed. Here, we developed a reflected light-sheet microscope with active optics for fast, high contrast, two-colour acquisition of -stacks. We demonstrate fast volume scanning by imaging a two-colour giant unilamellar vesicle (GUV) hemisphere. In addition, the high contrast enabled the imaging and tracking of single lipids in the GUV cap. The enhanced reflected scanning light-sheet microscope enables fast 3D scanning of artificial membrane systems and potentially live cells with single-molecule sensitivity and thereby could provide quantitative and molecular insight into the operation of cells.