Now showing items 21-30 of 70
Charge-coupled device imaging of rapid calcium transients in cultured arterial smooth muscle cells
(Elsevier, 1990)
Transient changes in the concentration of intracellular free calcium are associated with the transduction of primary signals and the subsequent employment of Ca2+ as a second messenger in a multitude of cell types. These ...
Transient measurement of dissolved oxygen using membrane electrodes
(Elsevier, 1989)
Transient mode dissolved oxygen measurement has been studied using a specially constructed galvanic membrane electrode controlled by a microcomputer. A four-layer diffusion model was developed to describe the dynamic ...
Fischer-Tropsch synthesis on bimetallic ruthenium-gold catalysts
(Elsevier, 1985-06)
The effect of Au in the behavior of Ru as a Fischer-Tropsch catalyst was studied. Two series of catalysts were investigated, one supported on SiO2 and the other on MgO. Au did not seem to alter the product distribution on ...
Monte Carlo simulations of membrane signal transduction events: Effect of receptor blockers on G-protein activation
(Kluwer Academic Publishers; Biomedical Engineering Society ; Springer Science+Business Media, 1995-05)
Cells have evolved elaborate strategies for sensing, responding to, and interacting with their environment. In many systems, interaction of cell surface receptors with extracellular ligand can activate cellular signal ...
Photocatalytic membrane of a novel high surface area TiO 2 synthesized from titanium triisopropanolamine precursor
(John Wiley & Sons, Ltd., 2006-08)
Photocatalytic membrane was successfully prepared using an efficiently high surface area TiO 2 catalyst, dispersed into polyacrylonitrile matrix. The catalyst was directly synthesized using titanium triisopropanolamine ...
Carbon-hydrogen bond activation over tungsten carbide catalysts
(Elsevier, 1994-08-30)
Tungsten carbides with surface areas ranging from 4 to 39 m2/g were prepared by the temperature-programmed carburization of tungsten oxide and nitride powders with pure CH4 or a 48.9% CH4 in H2 mixture. Oxygen uptakes on ...
Interfacial segregation in Ag-Au, Au-Pd, and Cu-Ni alloys: I. (100) surfaces
(Kluwer Academic Publishers; Springer Science+Business Media, 1993-03)
Atomistic simulations of segregation to (100) free surface in Ag−Au, Au−Pd, and Cu−Ni alloy systems have been performed for a wide range of temperatures and compositions within the solid solution region of these alloy phase ...
High resolution laser spectroscopy of relaxation and the excitation lineshape of excitons in GaAs quantum well structures
(Elsevier, 1990-04-01)
A new class of measurements on GaAs quantum well structures based on frequency domain nonlinear laser spectroscopy is described. Room temperature measurements of the excitation relaxation show an interference effect in the ...
Interfacial segregation in Ag-Au, Au-Pd, and Cu-Ni alloys: II. [001] Σ5 twist grain boundaries
(Kluwer Academic Publishers; Springer Science+Business Media, 1993-03)
Atomistic simulations of segregation to [001] Σ5 twist boundaries in Cu−Ni, Au−Pd, and Ag−Au alloy systems have been performed for a wide range of temperatures and compositions within the solid solution region of these ...
The Synthesis of Brominated Tetrafluoro[2.2]paracyclophanes Dedicated to Professor Henning Hopf
(WILEY-VCH Verlag, 2006-12)
The bromination of the two isomeric tetrafluoro[2.2]paracyclophanes was investigated under various conditions.We found selective conditions for mono- and dibrominationof 1,1,9,9-tetrafluoro[2.2]paracyclophane in high yields. ...