Nucleation of voids in metals during diffusion and creep /

Experimental evidence is presented which proves that voids formed during diffusion in brass are heterogeneously nucleated. The nuclei appear to be oxide particles, probably ZnO. When these are removed by re-melting, voids practically do not form upon subsequent dezincification. Brass which had been freed of void nucleation catalysts exhibited a considerably reduced tendency for grain boundary cracking during creep, and increased stress-rupture life.

Curiosities of the Bible : pertaining to Scripture persons, places, and things including prize questions and answers, Bible studies and test exercises founded upon and answered in the Bible, including blackboard outlines, seed thoughts illustrated, scripture emblems and allegories, Bible readings,concert exercises, prayer meeting subjects and daily readings with many ready reference tables and maps /

Mode of access: Internet.

Collated list of lunar formations named or lettered in the maps of Neilson, Schmidt, and Mädler,

Mode of access: Internet.

Maps of residuals from regression: their characteristics and uses in geographic research.

Bibliography: p. 59-60.

The dolmens of Ireland, their distribution, structural characteristics, and affinities in other countries; together with the folk-lore attaching to them; supplemented by considerations on the anthropology, ethnology, and traditions of the Irish people. With four maps, and eight hundred illustrations, including two coloured plates.

Mode of access: Internet.

Handbook for travellers in Constantinople, Brûsa, and the Troad. with maps and plans.

Edited by C.W. Wilson.

A short history of Anglo-Saxon freedom : the polity of the English-speaking race : outlined in its inception, development, diffusion, and present condition /

Includes bibliographical footnotes and index.

A diffusion and T2 relaxation MRI study of the ovine lumbar intervertebral disc under compression in vitro

The ovine lumbar intervertebral disc is a useful model for the human lumbar disc. We present preliminary estimates of diffusion coefficients and T-2 relaxation times in a pilot MRI study of the ovine lumbar intervertebral disc during uniaxial compression in vitro, and identify factors that hamper the ability to accurately monitor the temporal evolution of the effective diffusion tensor at high spatial resolution.

Modelling oxygen diffusion and cell growth in a porous, vascularising scaffold for soft tissue engineering applications

Soft tissue engineering presents significant challenges compared to other tissue engineering disciplines such as bone, cartilage or skin engineering. The very high cell density in most soft tissues, often combined with large implant dimensions, means that the supply of oxygen is a critical factor in the success or failure of a soft tissue scaffold. A model is presented for oxygen diffusion in a 15-60 mm diameter dome-shaped scaffold fed by a blood vessel loop at its base. This model incorporates simple models for vascular growth, cell migration and the effect of cell density on the effective oxygen diffusivity. The model shows that the dynamic, homogeneous cell seeding method often employed in small-scale applications is not applicable in the case of larger scale scaffolds such as these. Instead, we propose the implantation of a small biopsy of tissue close to a blood supply within the scaffold as a technique more likely to be successful. Crown Copyright (c) 2005 Published by Elsevier Ltd. All rights reserved.

Quantum effects on adsorption and diffusion of hydrogen and deuterium in microporous materials

Monte Carlo and molecular dynamics simulations and neutron scattering experiments are used to study the adsorption and diffusion of hydrogen and deuterium in zeolite Rho in the temperature range of 30-150 K. In the molecular simulations, quantum effects are incorporated via the Feynman-Hibbs variational approach. We suggest a new set of potential parameters for hydrogen, which can be used when Feynman-Hibbs variational approach is used for quantum corrections. The dynamic properties obtained from molecular dynamics simulations are in excellent agreement with the experimental results and show significant quantum effects on the transport at very low temperature. The molecular dynamics simulation results show that the quantum effect is very sensitive to pore dimensions and under suitable conditions can lead to a reverse kinetic molecular sieving with deuterium diffusing faster than hydrogen.