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Veranstaltungen / Calendar
Rheo-optische Untersuchung von Polyurethanlösungen in Dehnströmungen / Rheo-optical Study of Polyurethane Solutions in Extensional Flows
Editorial
Mix design of steel fiber reinforced concrete
Mix design of steel fiber reinforced concrete (SFRC) is concerned with achieving a workability, homogeneity, durability and strength suitable for its use. Variables defining any mix design of SFRC are commented below, as well as their influence on some properties of fresh and hardened SFRC. A special attention is paid…
Characteristics of sandwich-type structural elements built of advanced composite materials from three dimensional fabrics
Sandwich-type structures have proved to be alternatives of great success for several fields of application, and specially in the building sector. This is due to their outstanding properties of .specific rigidity and strength against bending loads and other range of advantages like fatigue and impact resistance, attain…
Composite materials from new textile technologies
The present paper describes in a general way the most important of the advanced textile technologies which are oriented to the manufacturing of organic matrix composite materials, the paper presents their applications and the possibilities of future development. The use of these advanced weaving techniques allows the…
lmpressum / Masthead
Patente / Patents
Reactive Groups on Polymer-Covered Electrodes. 5. Synthesis and Cyclovoltammetric Analysis of 3-Substituted Thiophene Derivatives
Various functionalized polythiophene films on electrode surfaces were produced by electropolymerization. Starting from 3-(2-hydroxyethyl)thiophene ( 1 ) different ether and ester derivatives were synthesized: 3-(2-(benzyloxy)ethyl)thiophene ( 2 ), 3-[2-((triphenylmethyl)oxy)ethyl]thiophene ( 3 ), 3-[2-((trimethylsilyl…
Structure of Dehydrated Zeolite Li−LSX by Neutron Diffraction: Evidence for a Low-Temperature Orthorhombic Faujasite
Li−LSX (Li−faujasite with Si/Al = 1), cubic at room temperature, is orthorhombic ( Fddd ) at 10 K. In the room-temperature Fd 3̄ phase, Li cations in the supercage are evenly distributed between 2-fold-coordinated sites III and III‘, in close agreement with the cation distribution in Na−X. The cubic−orthorhombic phase…
Thermal plasmas
Although many thermal plasma processes have been developed for industrial applications, the wide acceptance as a manufacturing technology is prevented due to economical and competitive reasons, and/or reproducibility and reliability aspects. This paper is devoted to an assessment of the present knowledge in the follow…
Dislocation Based Fracture Mechanics
This book, by one of the major contributors to dislocation theory, gives a highly detailed look, using planar examples, into the materials science aspects of many important physical processes associated with fracture.The compendium of references provided by this excellently researched book will be invaluable for the a…
Chiral nematic droplets with parallel surface anchoring
Chiral nematic droplets of various radii $R$ and intrinsic pitch $P$ with parallel boundary conditions have been observed using a polarizing microscope. The visual appearances of the droplets have been compared with computer simulations from model director fields. It is found that the director configuration depends st…
Identification of the symmetry of phonon modes in CsPbCl3 in phase IV by Raman and resonance-Raman scattering
The first- and second-order Raman phonon spectra of CsPbCl3 were measured in phase IV using Raman and resonance-Raman scattering. Twelve Raman active phonons were resolved at 32, 35.5, 42, 52, 72, 90, 110, 115, 121, 189, 200.5, and 375 cm−1 and correlated to the phonon spectrum of CsPbCl3 in phase I. The highest frequ…
Reversible Photoswitching of Second-Order Nonlinear Optical Properties in an Organic Photochromic Crystal
Noncentrosymmetric crystals of photochromic N-salicylidene-4-bromoaniline are obtained and studied for their second-order nonlinear optical properties. Second harmonic light is generated and can be seen by the naked eye. Moreover, photochromism in the bulk state yields totally reversible photoswitching of the second h…
X-ray crystal-structure refinement of the nearly commensurate phase of1T−TaS2in(3+2)-dimensional superspace
The structure of the nearly commensurate phase of $1T\ensuremath{-}{\mathrm{TaS}}_{2}$ ${(1T}_{2}\ensuremath{-}{\mathrm{TaS}}_{2})$ has been refined in $(3+2)$-dimensional superspace against single-crystal x-ray-diffraction data collected at 300 K. The intensities of main reflections and satellites up to sixth order w…
Asymmetric gap soliton modes in diatomic lattices with cubic and quartic nonlinearity
Nonlinear localized excitations in one-dimensional diatomic lattices with cubic and quartic nonlinearity are considered analytically by a quasi-discreteness approach. The criteria for the occurence of asymmetric gap solitons (with vibrating frequency lying in the gap of phonon bands) and small-amplitude, asymmetric in…
Impact of cell shape and chain formation on nutrient acquisition by marine diatoms
Diatoms have evolved a multitude of morphologies, including highly elongated cells and cell chains. Elongation and chain formation have many possible functions, such as grazing protection or effects on sinking. Here, a model of diffusive and advective nutrient transport is used to predict impacts of cell shape and cha…
Displacive radiation effects in the monazite- and zircon-structure orthophosphates
Monazite-structure orthophosphates, including ${\mathrm{LaPO}}_{4},$ ${\mathrm{PrPO}}_{4},$ ${\mathrm{NdPO}}_{4},$ ${\mathrm{SmPO}}_{4},$ ${\mathrm{EuPO}}_{4},$ ${\mathrm{GdPO}}_{4},$ and natural monazite, and their zircon-structure analogs, including ${\mathrm{ScPO}}_{4},$ ${\mathrm{YPO}}_{4},$ ${\mathrm{TbPO}}_{4},$…