Purpose: Capsular related complications may occur during and/or following cataract s”rPew. Methods: We used endocapsular PUMA rings (EPR) to prevent such complications in eyes with pre or peroperative zonular c’ehiscence, high myopic eyes and eyes witl: exfoliation syndrome which have weak zonoles. EPR can be implanted easily through the phaco-incision before aspiration of the cortex or just be...

It is sometimes profitable to measure the longitudinal nuclear spin polarization of He. The method described here takes advantage of the vaporized alkali metal already present in a glass target cell. Long range and short range interactions with polarized He gas result in an “effective” magnetic field felt by the alkali metal atoms. A precisely detectable Zeeman shift in the alkali EPR frequency...

Paramagnetic properties of model humic substances (HS) synthesized from 3,4,5-trihydroxybenzoic acid (gallic acid) were studied by means of EPR spectroscopy. A singlet EPR signal without any fine structure was observed for powder sample with spin density 6×10 spin/g, witdh 6.45 Gs and g=2.002. Results of the microwave power saturation pointed to a high dipolar relaxation enhancement. In aqueous...

The enhanced principal rank characteristic sequence (epr-sequence) of an n× n symmetric matrix over a field F was recently defined as `1`2 · · · `n, where `k is either A, S, or N based on whether all, some (but not all), or none of the order-k principal minors of the matrix are nonzero. Here, a complete characterization of the epr-sequences that are attainable by symmetric matrices over the fie...

In this brief article we provide an assessment of the state-of-the-art in EPR imaging, and suggest some of the future directions. Several reviews, including two by Ohno (1,2) and two by us (3,4) comprehensively discuss the literature. Here we provide an overview of published work (1-51), and unpublished results presented at the 10th International EPR Symposium in August 1987 (52-64). Only a ver...

introduction: acute renal failure is a common consequence of sepisis due to concurrent renal ischaemia. the role of nitric oxide (no) in endotoxaemia and in ischaemic injury in the kidney is not well defined. material and methods: in this study we have used an animal model of sepsis induced by injection of bacterial lipopolysaccharide (lps) in the rat and measured renal nitric oxide by x-band e...

Purpose: Capsular related complications may occur during and/or following cataract s”rPew. Methods: We used endocapsular PUMA rings (EPR) to prevent such complications in eyes with pre or peroperative zonular c’ehiscence, high myopic eyes and eyes witl: exfoliation syndrome which have weak zonoles. EPR can be implanted easily through the phaco-incision before aspiration of the cortex or just be...

Polycrystalline ammonium dithionate has been examined for its radiation response in the low dose range (<5Gy) using EPR technique. The SO(3)(-) radical ion was detected as a single EPR line with a peak-to-peak derivative width of ca. 0.44mT in irradiated samples and its intensity was found to vary linearly with dose. At equal and moderate settings of microwave power and modulation amplitude amm...

A miniaturised electrochemical cell design for Electron Paramagnetic Resonance (EPR) studies is reported. The cell incorporates a Loop Gap Resonator (LGR) for EPR investigation of electrochemically generated radicals in aqueous (and other large dielectric loss) samples and achieves accurate potential control for electrochemistry by using micro-wires as working electrodes. The electrochemical be...