Accelerated aging of the compounded sample was done by Atlas Suntest apparatus. The photodegradation studies were done using UVvis, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, and Yellowing index measurement. The molecular weight of the compounded sample before aging was determined by gel permeation chromatography (GPC). It was found that samples protected with hydroxyphenyl triazine type UV absorber and oligomeric
hindered amine show the best result for decreasing the degradation products, oxidation rate, and yellowing of the PC/ABS blend. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012″
“The pillared-graphene architecture proves to be a plausible attempt at integrating both graphene and carbon nanotubes in nanoelectronics. NCT-501 purchase The similitude of both material compositions reduces mismatching of lattice vibrational spectra at their interfaces, thereby enhancing capacity as a thermal sink to extract heat. Unlike previous work, this study centers on the interpillar phononics in these pillared-graphene nanostructures (PGN).
Classical molecular dynamics simulations are performed to emulate the phonon transport in PGN. It is evinced that intertube interaction diminishes the nanotube thermal conduction. The simulations show that long-wavelength out-of-plane modes contribute significantly to thermal conduction. A bidirectional mode propagation mechanism is proposed and believed Linsitinib cost to be indirectly responsible for the reduced thermal flux in PGN. Finally, parity analyses of three-phonon scattering selection rules further substantiate the notion of a dual-scattering nature of flexural modes. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3651089]“
“Objectives: Pancreatic fistula (PF) predicts mortality and morbidity in patients undergoing pancreaticoduodenectomy (PD). This study aimed to assess whether isolated Roux loop pancreaticojejunostomy (IPJ) is superior to conventional pancreaticojejunostomy
(CPJ).
Methods: XMU-MP-1 in vitro Between September 2003 and July 2007, we performed 108 PDs. All patients underwent classical Kausch-Whipple PD with pancreaticojejunostomy (PJ). Patients were divided into two groups based on the type of PJ. Patients in group 1 underwent IPJ and those in group 2 underwent CPJ. A retrospective analysis of prospectively maintained data was performed to compare outcomes in the two groups.
Results: There were 53 patients in group 1 and 55 in group 2. The two groups were comparable in both pre- and intraoperative parameters. The overall incidence of PF was 10.1% (five cases in group 1 vs. six in group 2). The course of clinically significant PF was similar in both groups in terms of fistula behaviour, management and the duration of spontaneous closure. Two patients in each group died.