World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Plos One : Broadband Transmission Epr Spectroscopy, Volume 8

By Soares, M. Claudio

Click here to view

Book Id: WPLBN0003944741
Format Type: PDF eBook :
File Size:
Reproduction Date: 2015

Title: Plos One : Broadband Transmission Epr Spectroscopy, Volume 8  
Author: Soares, M. Claudio
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Publication Date:
Publisher: Plos


APA MLA Chicago

Soares, M. C. (n.d.). Plos One : Broadband Transmission Epr Spectroscopy, Volume 8. Retrieved from

Description : EPR spectroscopy employs a resonator operating at a single microwave frequency and phase-sensitive detection using modulation of the magnetic field. The X-band spectrometer is the general standard with a frequency in the 9–10 GHz range. Most (bio)molecular EPR spectra are determined by a combination of the frequency-dependent electronic Zeeman interaction and a number of frequency-independent interactions, notably, electron spin – nuclear spin interactions and electron spin – electron spin interactions, and unambiguous analysis requires data collection at different frequencies. Extant and long-standing practice is to use a different spectrometer for each frequency. We explore the alternative of replacing the narrow-band source plus single-mode resonator with a continuously tunable microwave source plus a non-resonant coaxial transmission cell in an unmodulated external field. Our source is an arbitrary wave digital signal generator producing an amplitude-modulated sinusoidal microwave in combination with a broadband amplifier for 0.8–2.7 GHz. Theory is developed for coaxial transmission with EPR detection as a function of cell dimensions and materials. We explore examples of a doublet system, a high-spin system, and an integer-spin system. Long, straigth, helical, and helico-toroidal cells are developed and tested with dilute aqueous solutions of spin label hydroxy-tempo. A detection limit of circa 5 mM HO-tempo in water at 800 MHz is obtained for the present setup, and possibilities for future improvement are discussed.


Click To View

Additional Books

  • Plos One : a Non-invasive Stress Assay S... (by )
  • Plos One : Multivariate Analyses of Smal... (by )
  • Plos One : Effect of Small Molecules Mod... (by )
  • Plos One : Reciprocal Complementation of... (by )
  • Plos One : Characterization of Nasal Pot... (by )
  • Plos One : Nature-inspired Antimicrobial... (by )
  • Plos One : a Lactobacillus Rhamnosus Str... (by )
  • Plos One : Titanium Dioxide Tio2 Nanopar... (by )
  • Plos One : Altered Reward Circuitry in t... (by )
  • Plos One : Gene Expression Profile of Pe... (by )
  • Plos One : Iol Tilt and Decentration Est... (by )
  • Plos One : Prevalence and Associated Ris... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.