Electron Spin Resonance Investigations on Polystyrene-Carbon Nanotubes Composites

Materials ◽  
2004 ◽  
Author(s):  
Mircea Chipara ◽  
Jagannathan Sankar ◽  
David Hui
Keyword(s):  
Carbon Nanotubes ◽  
Electron Spin Resonance ◽  
Temperature Dependence ◽  
Electron Spin ◽  
Polymeric Matrix ◽  
Spin Resonance ◽  
First Time

Electron spin resonance investigations on nanocomposites obtained by dispersing carbon nanotubes within polystyrene are reported. The temperature dependence of ESR lines in the range 290 K to 420 K is investigated. It is for the first time that the effect of the polymeric matrix on the electron spin resonance spectra of carbon nanotubes is reported.

scholarly journals ESR and Radiocarbon Dating of Gut Strings from Early Plucked Instruments

2020 ◽  
Vol 3 (1) ◽  
pp. 13 ◽  
Author(s):  
Sumiko Tsukamoto ◽  
Taro Takeuchi ◽  
Atsushi Tani ◽  
Yosuke Miyairi ◽  
Yusuke Yokoyama
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Signal Intensity ◽  
Radiocarbon Dating ◽  
Oxidized Iron ◽  
Spin Resonance ◽  
First Time ◽  
Great Revival

Early European plucked instruments have recently experienced a great revival, but a few aspects remain unknown (e.g., the gauge of gut strings). Here we report, for the first time, that the electron spin resonance (ESR) signal intensity of oxidized iron, Fe(III), from gut strings at g = 2 increases linearly with age within a few hundred years. The signal increase in the remaining old strings on early instruments can be used to judge if they are as old as or younger than the instrument. Obtaining the authenticity information of gut strings contributes to the revival of the old instruments and the music.

Notes: Thermal Lability of Membrane Proteins of Age Separated Erythrocytes as Studied by Electron Spin Resonance Spin Label Technique

1987 ◽  
Vol 42 (11-12) ◽  
pp. 1343-1344 ◽  
Author(s):  
Grzegorz Bartosz ◽  
Gabriele Christ ◽  
Harald Bosse ◽  
Roland Stephan ◽  
Helmut Gärtner
Keyword(s):  
Electron Spin Resonance ◽  
Membrane Proteins ◽  
Erythrocyte Membrane ◽  
Electron Spin ◽  
Spin Label ◽  
Thermal Denaturation ◽  
Spin Resonance ◽  
Resonance Spin ◽  
First Time ◽  
Erythrocyte Membrane Proteins

Thermal lability of bovine erythrocyte membrane proteins was studied by electron spin resonance using maleimide spin label. The temperature of the sample during measurements could be varied for the first time be­ tween 0 and 60 °C with an accuracy of ± 0.1 °C. Our results show that “old” erythrocyte membrane proteins are less stable against thermal denaturation then “young” cells.

Radical cations of some substituted pyrenes

1970 ◽  
Vol 48 (13) ◽  
pp. 1996-1999 ◽  
Author(s):  
J. T. Cooper
Keyword(s):  
Electron Spin Resonance ◽  
Sulfur Dioxide ◽  
Chlorine Atom ◽  
Electron Spin ◽  
Hyperfine Splitting ◽  
Boron Trifluoride ◽  
Radical Cations ◽  
Molecular Orbital Calculations ◽  
Spin Resonance ◽  
First Time

The electron spin resonance spectra of several substituted pyrene cations, produced by oxidation with boron trifluoride in sulfur dioxide, are reported. The spectra are analyzed and the splitting constants given. With 4-chloropyrene, hyperfine splitting is observed due to the chlorine atom, for the first time in such a species. Molecular orbital calculations (Hückel and McLachlan) are presented for three of the compounds studied.

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