Search results for "MR"

ChemInform Abstract: Mixed Group 14-Group 14 Bonds. Part 7. An Incremental System for Estimating 13C NMR Chemical Shifts of Arylated Group 14 Compoun…

2010

Epidemiologia locale di MRSA, con riferimento alla circolazione di cloni ospedalieri e comunitari e al possibile ruolo della catena alimentare

2014

ABSTRACT Local epidemiology of MRSA,with reference to the circulation of hospital and community strains and the possible role of the food chain Introduction The aim of this PhD project is to evaluate the local epidemiology of MRSA strains and the related risk to the healthcare environment, the community and the food production chain. According to literature, MRSA is a rising problem in different settings and new strains are spreading all over the world. In addition to HA-MRSA, CA-MRSA e LA-MRSA are new important problems to face. In this contest, this study is focused to estimate the frequency of isolation of MRSA in different kind of samples and to analyze the main features of the collecte…

GROWTH RATE OF SMALL (≤2CM) HCC IN CIRRHOTIC PATIENTS: DETERMINING OPTIMAL SCREENING INTERVAL WITH SERIAL CT AND MRI

2010

Tumor enhancement at contrast-enhanced CT and Gd-enhanced MRI for the assessment of treatment response of hepatocellular carcinoma (HCC) after sorafe…

2012

Scopo: To investigate whether arterial enhancement of advanced HCC during pre-treatment and follow-up contrast-enhanced CT (CECT) or Gd-enhanced MRI (Gd-MRI) can be used to predict tumor response to sorafenib. Materiali e metodi: Seventeen patients (12M, 5F; mean age: 69 years) receiving sorafenib for inoperable HCC between 2007 and 2010 were included. Median interval time between pre-treatment and follow-up CECT or Gd-MRI was 160 days. Tumor arterial enhancement was measured at baseline and follow-up: (tumor attenuation/intensity on arterial phase – tumor attenuation/intensity on unenh! anced images)/(tumor attenuation/intensity on unenhanced images) x 100. Response was assessed according …

EVALUMION OF THE CHEMICAL PHYSICAL DIFFERENCES AMONG SICILIAN HONEYS

2009

Electronic characterisation of the oxidized state of the blue copper protein Rusticyanin by 1 H NMR: Is the axial methionine the dominant influence f…

2001

The oxidized state of rusticyanin, the blue copper protein with the highest redox potential in its class, has been investigated through (1)H nuclear magnetic resonance applied to its cobalt(II) derivative. The assignment of the protons belonging to the coordinated residues has been performed. Many other amino acids situated in the vicinity of the metal ion, including six hydrophobic residues (isoleucine140 and five phenylalanines) have also been identified. The orientation of the main axes of the magnetic susceptibility tensor for the cobalt(II)-rusticyanin as well as its axial, Deltachi(ax), and rhombic, Deltachi(rh), magnetic susceptibility anisotropy components have been determined. A co…

Carbonyl Hypoiodites as Extremely Strong Halogen Bond Donors

2021

Abstract Neutral halogen‐bonded O−I−N complexes were prepared from in situ formed carbonyl hypoiodites and aromatic organic bases. The carbonyl hypoiodites have a strongly polarized iodine atom with larger σ‐holes than any known uncharged halogen bond donor. Modulating the Lewis basicity of the selected pyridine derivatives and carboxylates leads to halogen‐bonded complexes where the classical O−I⋅⋅⋅N halogen bond transforms more into a halogen‐bonded COO−⋅⋅⋅I−N+ ion‐pair (salt) with an asymmetric O−I−N moiety. X‐ray analyses, NMR studies, and calculations reveal the halogen bonding geometries of the carbonyl hypoiodite‐based O−I−N complexes, confirming that in the solid‐state the iodine at…

Enhanced sampling in simulations of dense systems

2002

In the simulations of a variety of systems we encounter the problem of large relaxation times due to the dense packing of the systems constituents. We propose an algorithm to overcome this slowing down by temporarily allowing the constituents of a 3d systems to escape into a 4th space coordinate. The idea will be exemplified for the problem of a homopolymer collapse.

A Specialized Architecture for Color Image Edge Detection Based on Clifford Algebra

2013

Edge detection of color images is usually performed by applying the traditional techniques for gray-scale images to the three color channels separately. However, human visual perception does not differentiate colors and processes the image as a whole. Recently, new methods have been proposed that treat RGB color triples as vectors and color images as vector fields. In these approaches, edge detection is obtained extending the classical pattern matching and convolution techniques to vector fields. This paper proposes a hardware implementation of an edge detection method for color images that exploits the definition of geometric product of vectors given in the Clifford algebra framework to ex…

uMemristorToolbox: Open source framework to control memristors in Unity for ternary applications

2020

This paper presents uMemristorToolbox, a novel open source framework that reads and writes non-volatile ternary states to memristors. The Unity (C#) framework is a port of the open source Java project Memristor-Discovery and adds a closed-loop ternary memory controller to enable both PC and real-time embedded ternary applications. We validate the closed-loop ternary memory controller in an embedded system case study with 16 M+SDC Tungsten dopant memristors. We measure an average switching speed of 3 Hz, worst case energy usage of 1 μW per switch, 0.03% random write error and no decay in (non-volatile) state retention after 15 minutes. We conclude with observations and open questions when wo…