investigation of biological systems by high resolution 2-mm wave band esr

the application of high resolution esr to the investigation of various biological systems is discussed. the advantages of the technique in the study of structural, conformational and dynamic characteristics have been exemplified by spin-labeled human serum albumin, egg lysozyme, liposome membranes, inverted micelles, alpha -chymotrypsin, ..

eigenchannel r-matrix calculation of the even-parity 6pnf j=2,3,4 autoionizing levels of barium

the 6pnf j=2,3,4 autoionizing levels of barium are studied through a combination of the eigenchannel r-matrix and the multichannel quantum defect theory (mqdt) methods. the calculation reproduces well the spectra of 6pnf series observed in excitation from 5d6p levels and confirms that the 6pnf levels have very large autoionization rates. ..

measurements of the cotton-mouton effect of water and of several aqueous solutions

the authors report a new measurement of the cotton-mouton constant, at 632.8 nm of liquid water, together with measurements, at the same wavelength of the cotton-mouton effect in several aqueous ionic solutions of varying concentration. they show how these results may be combined with literature values of optical kerr measurements in the ..

On the non-linear viscoelastic behaviour of polymermatrix composites

The non-linear viscoelastic response of a unidirectional carbonfibre-reinforced polymer composite has been studied. For the needs of the present study, creep and recovery tests in tension for different stress levels were executed while measurements were m

A dynamic Monte-Carbo simulation for unidirectional composites under tensile impact

A dynamic Monte-Carlo simulation method, based on a two-dimensional model with fine mesh, sufficient fibers and adequate length, which takes the effect of the inertia and the constitutions of rate dependence into account for the unidirectional composites

Impact behavior of laminated composites: physical basis for finite element analysis

The aim of this paper is to present a method for taking into account, in numerical terms, the physics of damage events occurring during impact of composite structures and considering both the constraints of the explicit 3D finite-element analysis (especially the stability condition which links time and spatial discretisation) and the lack..

Determination of the microtexture of reinforced thermoplastics by image analysis

The mechanical properties of reinforced thermoplastics depend on such characterisitcs of the filler as granulometry, orientation and dispersion. These different microtextural parameters were determined by using a single tool: image analysis, which was cou

Debonding and cracking energy release rate of the fiber/matrix interface

An investigation of fibre/matrix interfacial fracture energy is presented in this paper. Several existing theoretical expressions for the fracture energy of interfacial debonding are reviewed. For the single-fiber/matrix debonding and pull-out experimental model, a study is carried out on the effect of interfacial residual compressive str..

Automated production of sacks

This article describes a system invented by Novatex SpA which weaves two fabrics simultaneously joining them around three edges. The technique is similar to pillowease weaving but also provides a section that separates each of the two layers so that the fabric can be cut to create individual sacks. The sacks produced can be used for packi..

Textile Materials for Medical and Healthcare Applications

A reivew of medical and healthcare textiles organizes these products into four categories: nonimplantable materials, including wound dressings, bandages, and plasters; extracorporeal devices, including artificial kidneys, livers, and lungs; implantable st