The interaction of the complementary K (Ac-(KIAALKE)3-GW-NH2) and E (Ac-(EIAALEK)3-GY-NH2) peptides, components of the zipper of an artificial membrane fusion system (Robson Marsden H. et al. Angew Chemie Int Ed. 2009) is investigated by electron paramagnetic resonance (EPR). By frozen solution continuous-wave EPR and double electron-electron resonance (DEER), the distance between spin labels a...

Quantum mechanics postulates that the hydrogen atom has a stable ground state from which it can be promoted to excited states by capture of electromagnetic radiation, with energy all possible given En = −13.598/n2 eV, in n ≥ 1 is positive integer. It been previously proposed not true state, and so-called hydrino lower exist, are characterized fractional quantum numbers 1/p, < p ≤ 137 limited El...

In this era of intense study of free radicals and antioxidants, electron paramagnetic resonance (EPR) is arguably the best-suited technique for such research, particularly when considering biochemical and biological systems. No attempt was made to cover all the topics of EPR application but instead attention was restricted to two areas that are both novel and received less attention in previous...

Electron paramagnetic resonance (EPR) spectroscopy provides a variety of tools to study structures and structural changes of large biomolecules or complexes thereof. In order to unravel secondary structure elements, domain arrangements or complex formation, continuous wave and pulsed EPR methods capable of measuring the magnetic dipole coupling between two unpaired electrons can be used to obta...

Primary free radical formation in trehalose dihydrate single crystals X-irradiated at 10 K was investigated at the same temperature using X-band Electron Paramagnetic Resonance (EPR), Electron Nuclear Double Resonance (ENDOR) and ENDOR-induced EPR (EIE) techniques. The ENDOR results allowed the unambiguous determination of six proton hyperfine coupling (HFC) tensors. Using the EIE technique, th...

This review paper attempts to provide an overview of the principles and techniques that are often termed electron paramagnetic resonance (EPR) oximetry. The paper discusses the potential of such methods and illustrates they have been successfully applied to measure oxygen tension, an essential parameter of the tumor microenvironment. To help the reader understand the motivation for carrying out...

In this paper we compare the magnetic and electron paramagnetic resonance (EPR) properties of Pr0.5Ca0.5MnO3 (PCMO) Bi0.5Ca0.5MnO3 (BCMO) charge ordered manganites. PCMO BCMO samples were prepared by solid state reaction method. A commercial SQUID magnetometer was used to study dc-magnetization in temperature range 10-300 K. The EPR experiments carried out using a X-band (frequency ? 9.4 GHz) s...

It is shown that our multi-high-frequency (402200 GHz) resonant cavity technique yields distortion-free high-field electron paramagnetic resonance ~EPR! spectra for single-crystal samples of the uniaxial and biaxial spin S510 single-molecule magnets ~SMM’s! @Mn12O12(CH3COO)16(H2O)4#•2CH3COOH•4H2O and @Fe8O2(OH)12(tacn)6#Br8•9H2O. The observed line shapes exhibit a pronounced dependence on tempe...