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...

We present the tool qbf2epr which translates quantified Boolean formulas (QBF) to formulas in effectively propositional logic (EPR). The decision problem of QBF is the prototypical problem for PSPACE, whereas EPR is NEXPTIME-complete. Thus QBF is embedded in a formalism, which is potentially more succinct. The motivation for this work is twofold. On the one hand, our tool generates challenging ...

The establishment of an efficient reverse supply chain is important, especially in the electronics industry, considering the environmental and resource pressures worldwide. Extended Producer Responsibility (EPR), an important environmental policy approach, has been adopted extensively in various countries, and the effectiveness of its implementation has been proven through practical application...

Einstein-Podolsky-Rosen (EPR) steering describes the ability of one observer to nonlocally "steer" the other observer's state through local measurements. EPR steering exhibits a unique asymmetric property; i.e., the steerability can differ between observers, which can lead to one-way EPR steering in which only one observer obtains steerability in the steering process. This property is inherentl...

BACKGROUND A growing number of health care organizations are implementing a system of electronic patient records (EPR). This implies a change in work routines for nursing staff, but it could also be regarded as an opportunity to improve the quality of care. OBJECTIVE The objective of this paper is to obtain more insight into the usefulness of EPR as perceived by nursing staff and to clarify t...

Electron paramagnetic resonance (EPR) spectroscopy was used for examination of free radicals in thermally treated vaselinum album (VA). Thermal treatment in hot air as sterilization process was tested. Conditions of thermal sterilization were chosen according to the pharmaceutical norms. Vaselinum album was heated at the following conditions (T--temperature, t--time): T = 160°C and t = 120 min,...

Electron paramagnetic resonance ~EPR! measurements of Si/SiO2 systems began over 30 years ago. Most EPR studies of Si/SiO2 systems have dealt with two families of defects: Pb centers and E8 centers. Several variants from each group have been observed in a wide range of Si/SiO2 samples. Some of the most basic aspects of this extensive, body of work remain controversial. EPR is an extraordinary p...