The purpose of this paper is to describe some of the areas where electron paramagnetic resonance (EPR) has provided unique information to MRI developments. The field of application mainly encompasses the EPR characterization of MRI paramagnetic contrast agents (gadolinium and manganese chelates, nitroxides) and superparamagnetic agents (iron oxide particles). The combined use of MRI and EPR has...

Electron paramagnetic resonance (EPR)-based oximetry is capable of quantifying oxygen content in samples. However, for a heterogeneous environment with multiple pO2 values, peak-to-peak linewidth of the composite EPR lineshape does not provide a reliable estimate of the overall pO2 in the sample. The estimate, depending on the heterogeneity, can be severely biased towards narrow components. To ...

The paper is devoted to review of development and application of EPR dosimetry with teeth in Ukraine. It deals with specific features of the EPR dosimetry protocol, which was developed and is practically used in SCRM for retrospective dosimetry of clean-up workers (liquidators). Extensive methodological research was conducted in SCRM in order to develop an original version of EPR dosimetric pro...

due to the heterogeneous nature of granular soils and the involvement of many effective parameters in the geotechnical behavior of soil-foundation systems, the accurate prediction of shallow foundation settlements on cohesionless soils is a complex engineering problem. in this study, three new evolutionary-based techniques, including evolutionary polynomial regression (epr), classical genetic p...

Greater political pressure to improve corporate environmental performance and mitigate climate change impact leads firms operate under greater risk uncertainty, affecting productivity firm value. Using a panel of 3255 US from 2002 2020, this research tests the effectiveness two environment-specific (EPR) mitigation approaches: lobbying green innovation. The results suggest that while both appro...

The physical and chemical nature of several defects involved in metal–oxide–silicon (MOS) device instabilities have become fairly well understood through studies involving electron paramagnetic resonance (EPR). Recent EPR studies suggest that some of these defects play important roles in the negative bias temperature instability (NBTI). This paper reviews recent NBTI EPR studies as well as earl...

The polarity of protein surfaces is one of the factors driving protein-protein interactions. High-field, spin-label EPR at 95 GHz, i.e., 10 times higher than conventional EPR, is an upcoming technique to determine polarity parameters of the inside of proteins. Here we show that by 275 GHz EPR even the small polarity differences of sites at the protein surface can be discriminated. To do so, fou...

There are many aspects of obtaining good EPR data, for which there is need for a standard, or calibrant, to aid in determining uncertainty and reproducibility of the results. There should be a calibrant/standard for almost every variable known to affect the EPR signal, whether CW (linear or nonlinear) or time-domain. In the past, EPR standards have primarily focused on three issues: g-value, sp...

It has been known for a long time that the melanin pigments present in normal skin, hair, and most of malignant melanomas can be detected by electron paramagnetic resonance (EPR) spectrometry. In this study, we used EPR imaging as a tool to map the concentration of melanin inside ex vivo human pigmented and nonpigmented melanomas and correlated this cartography with anatomopathology. We obtaine...