Bio-Medical Materials and Engineering - Volume 1, issue 3
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Bio-Medical Materials and Engineering is to promote the welfare of humans and to help them keep healthy. This international journal is an interdisciplinary journal that publishes original research papers, review articles and brief notes on materials and engineering for biological and medical systems.
Articles in this peer-reviewed journal cover a wide range of topics, including, but not limited to: Engineering as applied to improving diagnosis, therapy, and prevention of disease and injury, and better substitutes for damaged or disabled human organs; Studies of biomaterial interactions with the human body, bio-compatibility, interfacial and interaction problems; Biomechanical behavior under biological and/or medical conditions; Mechanical and biological properties of membrane biomaterials; Cellular and tissue engineering, physiological, biophysical, biochemical bioengineering aspects; Implant failure fields and degradation of implants. Biomimetics engineering and materials including system analysis as supporter for aged people and as rehabilitation; Bioengineering and materials technology as applied to the decontamination against environmental problems; Biosensors, bioreactors, bioprocess instrumentation and control system; Application to food engineering; Standardization problems on biomaterials and related products; Assessment of reliability and safety of biomedical materials and man-machine systems; and Product liability of biomaterials and related products.
Abstract: The adsorption and chromatographic properties of hydroxyapatite sorbents for application to different viruses have been investigated. The strong adsorption of viruses was observed on macroporous hydroxyapatite with hydrophilic properties of the sorbent surface. The viruses were purified on this sorbent without loss of biological activity. The column can be used for virus vaccine production.
Abstract: The renal calculi are studied by using an X-ray diffractometer for different chemical composition of the stones. A new constituent, α-quartz, is confirmed to be present in the renal calculi which is responsible for piezoelectric property of such materials.
Abstract: Dielectric properties of kidney stones in processed form are studied in a frequency range of 1 kHz–l0 MHz. The samples under test are in the fonn of discs of the stones. The dielectric properties are found to be highly dependent on the frequency, and as expected, similar to those of conventional electro-ceramics and other such bio-materials, due to presence of alpha-quartz in the calculi.
Abstract: A cruciate ligament fatigue/wear testing system TTF600 was developed at École Polytechnique in order to reproduce a little better the loading conditions and environment in which they perform. This machine was designed to subject the ligaments to simultaneous tension, bending and torsion. The amplitude of each loading can be adjusted separately. This allows to better define the effect of each loading mode on the viability of a prosthetic device. Six devices can be tested simultaneously in a liquid environment at 37°C. The loading conditions and the behaviour of the prosthesis are monitored by computer.
Abstract: It has been said by many investigators that hydroxyapatite ceramics may be prospective bone substitute materials. Its mechanical brittleness and strength has been the most serious consideration. In the present article a study has been done using animal experiments, the changes of surface strain at the hydroxyapatite implantation site of long-bone when the compressive stress is applied in the direction of long axis, in order to clarify the mechanical behaviors of hydroxyapatite living bone complex. The nonimplanted side was used as the control. Results revealed that the hydroxyapatite living bone complex has been proven to have sufficient flexibility such that…it shows no hysteresis in stress versus strain relation up to 200 kg of applied load. The strain distribution pattern on the HA-implanted bone is quite similar to that of the nonimplanted one. This characteristic also suggests that it has normal skeletal function.
Abstract: A two-dimensional finite-difference numerical model is developed for the blood flow at the aortic bifurcation to determine the possible role of fluid dynamics in the atherogenesis. Arterial walls are assumed to be rigid, while the fluid is Newtonian. Parametric studies are performed to evaluate the effects of the area ratio, Reynolds number, corner curvatures, Womersley number, bifurcation angle and arterial pulsation on the flow and shear stresses. A high shear stress region exists on the inner wall distal to the vertex, while both high and low shear stress regions coexist along the outer wall. A temporary eddy is found along…the outer wall, with more strength in the case of a higher area ratio. The results agree qualitatively with the existing experimental observations.