Now showing items 1-10 of 76
Simulation and theory of abnormal grain growth--anisotropic grain boundary energies and mobilities
(Elsevier, 1989-04)
Abnormal grain growth has been studied by means of a computer-based Monte Carlo model. This model has previously been shown to reproduce many of the essential features of normal grain growth. The simulations presented in ...
Ion beam modification of metals: Compositional and microstructural changes
(Elsevier, 1989)
Ion implantation has become a highly developed tool for modifying the structure and properties of metals and alloys. In addition to direct implantation, a variety of other ion beam techniques such as ion beam mixing, ion ...
Local bonding configurations of amorphous SexTe1-x films
(Elsevier, 1989-12-01)
X-ray absorption measurements at both the Se and Te K-edges have been performed in binary chalcogenide amorphous (a-) SexTe1-x films. The EXAFS results for the Se K-edge indicate that the number of Se-Se bonds decreases ...
Linearized embedding: A new metric matrix algorithm for calculating molecular conformations subject to geometric constraints
(John Wiley & Sons, Inc., 1989-10)
There are many methods in the literature for calculating conformations of a molecule subject to geometric constraints, such as those derived from two-dimensional NMR experiments. One of the most general ones is the EMBED ...
Transtubular bioreactor: A perfusion device for mammalian cell cultivation
(Kluwer Academic Publishers; Science & Technology Letters ; Springer Science+Business Media, 1989-01)
A transtubular mammalian cell perfusion chamber has been developed that allows separate delivery and control of medium and gas flow to the cells. The hydrodynamic and mass transfer characteristics of the reactor are studied ...
Similarities in the fracture surface features of borosilicate and polymer glasses
(Kluwer Academic Publishers; Chapman and Hall Ltd. ; Springer Science+Business Media, 1989-10)
Considerable similarity exists between the features on the fracture surfaces of a borosilicate glass and those on the fracture surfaces of polymer thermoset glasses like epoxies and vinyl esters. These features include the ...
A petrographic thin sectioning technique for evaluating composite materials
(Kluwer Academic Publishers; Chapman and Hall Ltd. ; Springer Science+Business Media, 1989-08)
A Monte Carlo-finite element model for strain energy controlled microstructural evolution: "rafting" in superalloys
(Elsevier, 1989-02)
A specialized microstructural model, MCFET, has been developed which simulates microstructural evolution in materials in which strain energy plays an important role in determining morphology. The elastic contribution to ...
Measurement of ammonia and glutamine in cell culture media by gas sensing electrodes
(Kluwer Academic Publishers; Science & Technology Letters ; Springer Science+Business Media, 1989-04)
This paper describes the use of a commercially available off-line gas sensing electrode for determination of ammonia and glutamine in cell culture media. The measurement technique was tested in different media preparations ...
Potentiometric ion- and bio-selective electrodes based on asymmetric cellulose acetate membranes
(Elsevier, 1989)
The potentiometric response properties of ammonium-, carbonate-, and proton-selective electrodes prepared by incorporating appropriate neutral carriers within novel asymmetric cellulose acetate membranes are reported. The ...