Zobrazeno 1 - 10
of 91
pro vyhledávání: '"L.S. Singer"'
Autor:
Frank D’Ovidio, L.S Singer, Andrew Pierre, Denis Hadjiliadis, Yaron Shargall, Thomas K. Waddell, S.M. Chernenko, Michael Hutcheon, S Kheshavjee, M. de Perrot
Publikováno v:
The Journal of Heart and Lung Transplantation. 23:S69
Autor:
I.C. Lewis, L.S. Singer
Publikováno v:
Carbon. 16:417-423
Electron spin resonance (ESR) data have been obtained for a well-graphitizing and a poorly-graphitizing pitch as a function of heat-treatment time at reaction temperatures between 400° and 490°C. Measurements of ESR spin concentration and linewidth
Autor:
L.S. Singer, Irwin C. Lewis
Publikováno v:
Carbon. 22:487-492
A preliminary study of Electron-Nuclear Double Resonance (ENDOR) has been carried out on carbonaceous pitches and their solutions. Large matrix and hyperfine ENDOR signals have been observed, the former being very sensitive to temperature, i.e. molec
Autor:
L.S. Singer, A.A. Bright
Publikováno v:
Carbon. 17:59-69
The electronic properties (resistivity, magnetoresistance, and electron spin resonance) of mesophase pitch-based carbon fibers have been studied in relation to the fiber structure and processing conditions. Reproducible correlations between the elect
Publikováno v:
Carbon. 17:435-440
Diamagnetic susceptibility, electron spin resonance, and specific heat measurements have been made on a magnetically-oriented mesophase pitch. The diamagnetic anisotropy (χ⊥ − χ∥) was found to be −0.69 × 10−6emu CGSg−1 and the average
Autor:
L.S. Singer
Publikováno v:
Carbon. 16:409-415
The evolution of the basic carbonization studies which led to the development of carbon fibers from mesophase pitch is described. The structure and properties of these fibers and comparisons with carbon fibers from other precursors are also discussed
Publikováno v:
Carbon. 25:249-257
A laboratory high-temperature centrifuge capable of operating up to 500°C at centrifugal accelerations of 600 g has been designed and constructed. The apparatus has been particularly useful in separating the isotropic and anisotropic phases in mesop
Autor:
L.S. Singer, Ronald Alfred Greinke
Publikováno v:
Carbon. 26:665-670
The molecular constitutions of the coexisting anisotropic and isotropic phases of a heat-treated petroleum pitch were studied as a function of heat treatment time. The results show that the coexisting phases, which were isolated by high temperature c
Autor:
L.S. Singer, Janice Breedon Jones
Publikováno v:
Carbon. 20:379-385
The ESR properties of 3000°C heat treated fibers derived from mesophase pitch and PAN have been measured and compared with computer-simulated spectra. Conduction electron motional averaging was observed in the PAN- and pitch-based fibers with domain