The origin of the multiple melting peaks may be a result of a melting and recrystallization Selleck LY333531 mechanism during DSC scans. Wide-angle X-ray diffraction patterns showed two new diffraction peaks, which appeared at 0.44 and 0.37 nm, and are characteristic peaks of alpha-form (triclinic structure) of even-even nylons with increasing annealing temperature. The intensities of these peaks increased, and they split further apart, with elevated annealing temperatures. The solid-state (15)N CP/MAS NMR spectra of the nylon 18 18 samples that had been quenched and annealed also confirmed the alpha-crystalline form. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 92-98, 2012″
“We demonstrate the dynamics
of coupling between the coherent longitudinal optical (LO) phonon and plasmon of instantaneously photogenerated electrons in an undoped GaAs/n-type GaAs (i-GaAs/n-GaAs) epitaxial structure using time-domain terahertz spectroscopy. Initially, we experimentally and numerically clarify the presence of the built-in electric field in the i-GaAs layer of the i-GaAs/n-GaAs epitaxial layer. Next, we performed the terahertz-wave measurements of the i-GaAs/n-GaAs epitaxial structure at various excitation conditions from a low density excitation regime to a high excitation regime. The LO-phonon-plasmon coupled (LOPC) mode has been confirmed from the terahertz-wave
measurement. It is found that the frequency of the LOPC mode is determined by the pump-beam power. This fact demonstrates that the LOPC mode is formed in the i-GaAs layer. In addition, we performed the time-partitioning Fourier ISRIB transform in order to reveal the dynamical change in the LOPC mode as a function of time delay. Using this analysis, we have observed that the disappearance of the LOPC mode immediately occurs within the time delay of 0.6 ps.
Following the disappearance of the LOPC mode, only the bare coherent GaAs LO phonon dominates the terahertz waves. (C) 2011 American Institute of Physics. [doi:10.1063/1.3603046]“
“Sclerosing stromal Tucidinostat manufacturer tumours (SST) of the ovary are rare, benign tumours. SSTs are usually hormone inactive and tend to occur in the second and third decades of life. The most common clinical symptom is menstrual irregularity.
Fourteen women diagnosed with SST of the ovary were included in this study. Tumour samples were collected, embedded in paraffin and stained with haematoxylin and eosin, periodic acid-Schiff (PAS), and PAS with digestion, as well as immunohistochemically for vimentin, smooth muscle actin, desmin, CD 99, inhibin-alpha and the oestrogen and progesterone receptor.
The age of the patients ranged from 16 to 54 years (mean age 25.2 years). The tumours ranged in size from 6 to 21 cm (mean 10.5 cm). Macroscopically, eight tumours were solid and six were solid and cystic. All SSTs were well circumscribed with pseudolobule formation.