The molar mass variation was investigated

by size exclusion chromatography-multiangle laser light scattering chromatography, and the thermal characteristics were detected by the conventional differential scanning calorimetry and dynamic mechanical thermal analysis. Tensile tests were performed at room temperature and at 60 C. Our attention was essentially focused on the crystallization behavior of the various samples obtained. A modest decline in the molar mass was obtained with two mixing temperatures of 210 and 250 C, but a significant increase in the crystalline phase content was noticed, with a concomitant tremendous increment in the crystallization rate. A correlation was also made between click here the molar mass distribution and crystallization rate in isothermal conditions, where clearly visible were the effects of the processing temperature www.selleckchem.com/products/Cyt387.html on both the molar mass distribution and how the nucleating agents affected the crystallinity of PLLA. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 3528-3536, 2011″
“The postictal state is defined as manifestation of seizure-induced reversible alterations in neuronal function, but not structure. Following a seizure, it is common to experience feelings of exhaustion, both mental and physical, that can last a day or two. There are three major hypotheses

regarding what cellular and molecular mechanisms could cause the observed postictal symptoms: neurotransmitter depletion I-BET-762 solubility dmso or changes in receptor concentration, active inhibition, and cerebral blood flow changes. Here, we describe the contributions of functional neuroimaging studies to the understanding of postictal symptoms. (C) 2010 Elsevier Inc. All rights reserved.”
“The design of some optical devices, such as semiconductor optical amplifiers for telecommunication applications, requires polarization-insensitive optical emission at long

wavelengths (1300-1550 nm). Self-assembled InAs/GaAs quantum dots (QDs) typically exhibit ground state optical emissions at wavelengths shorter than 1300 nm with highly polarization-sensitive characteristics, although this can be modified by the use of low growth rates, the incorporation of strain-reducing capping layers, or the growth of closely-stacked QD layers. Exploiting the strain interactions between closely stacked QD layers also affords greater freedom in the choice of growth conditions for the upper layers, so that both a significant extension in their emission wavelength and an improved polarization response can be achieved due to modification of the QD size, strain, and composition. In this paper, we investigate the polarization behavior of single and stacked QD layers using room temperature sub-lasing-threshold electroluminescence and photovoltage measurements, as well as atomistic modeling with the NEMO 3-D simulator.