Copolymerization of L-Lactide and ε-Caprolactone promoted by zinc complexes with phosphorus based ligands.

The zinc complexes and bearing chelating phosphorous based pincer ligands were found to catalyze the ring-opening copolymerization of L-lactide and ε-caprolactone in the melt at 110 °C to obtain a series of random copolymers in which the monomer distributions were coherent with the monomer ratio in the feed. All the obtained copolymers showed high molecular masses with monomodal and moderately narrow distributions. The thermal properties of the achieved copolymers (T, glass transition temperature, and T, melting temperature) were strongly dependent on their composition.

Aluminium complexes of salanol ligands: coordination chemistry and stereoselective lactide polymerization.

The tetradentate dianionic {ONNO}-type salanol ligands featuring phenolate and alcoholate arms and a chiral-bipyrrolidine core are introduced. The diastereoselectively-formed {ONNO}-Al-OBn complexes catalyze the ring-opening polymerization of rac-lactide and meso-lactide by either the dual stereocontrol or the chain-end stereocontrol mechanisms to give PLAs of all possible tacticities.

Study for online range monitoring with the interaction vertex imaging method.

Ion beam therapy enables a highly accurate dose conformation delivery to the tumor due to the finite range of charged ions in matter (i.e. Bragg peak (BP)).

A pencil beam approach to proton computed tomography.

Purpose: A new approach to proton computed tomography (pCT) is presented. In this approach, protons are not tracked one-by-one but a beam of particles is considered instead. The elements of the pCT reconstruction problem (residual energy and path) are redefined on the basis of this new approach.

Quantitative proton imaging from multiple physics processes: a proof of concept.

Proton imaging is developed in order to improve the accuracy of charged particle therapy treatment planning. It makes it possible to directly map the relative stopping powers of the materials using the information on the energy loss of the protons. In order to reach a satisfactory spatial resolution in the reconstructed images, the position and direction of each particle is recorded upstream and downstream from the patient.

Comparison of Strut Coverage at 6 Months by Optical Coherence Tomography With Everolimus-Eluting Stenting of Bare-Metal Stent Restenosis Versus Stenosis of Nonstented Atherosclerotic Narrowing (from the DESERT Study).

Incomplete struts coverage is a predictor of late stent thrombosis after implantation of the drug-eluting stents (DES) in atherosclerotic lesions. The process of struts coverage in DES implanted for bare-metal stent (BMS) restenosis has never been described. Thirty-two patients with stable coronary artery disease were consecutively selected, 11 with BMS restenosis (group A) and 21 with de novo atherosclerotic lesions (group B).

The impact of tracking system properties on the most likely path estimation in proton CT.

Proton CT nowadays aims at improving hadron therapy treatment planning by mapping the stopping power of materials. In order to optimize a spatial resolution of the reconstructed images, the most likely path (MLP) of each proton can be computed. We investigated the errors in the computation of this path due to the configuration of the system, i.

Endogenous endophthalmitis associated with intravenous drug abuse.

Purpose: To describe demographics, characteristics, and management of eyes with endogenous endophthalmitis (EE) in intravenous drug abusers.

Methods: Retrospective chart review of patients with EE who presented to University Hospital, New Jersey Medical School between January 2005 and October 2012.

Results: Thirty-four patients presented with a clinical diagnosis of EE during this time period.

Penetrating trauma associated with findings of multiple evanescent white dot syndrome in the second eye: coincidence or an atypical case of sympathetic ophthalmia?

Purpose: To report a case of sympathetic ophthalmia (SO) resembling multiple evanescent white dot syndrome (MEWDS).

Methods: Retrospective chart review.

Results: A 17-year-old girl with a ruptured globe in the right eye underwent prompt primary repair and vitrectomy, scleral buckling, and silicone oil infusion 3 weeks later.