(C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 1856-1863, 2009″
“Delayed hydride cracking (DHC) tests were conducted on a cold-worked Zr-2.5Nb tube with hydrogen at different test temperatures ranging from 100 to 350 degrees C. Striation spacing corresponding to a critical hydride length increased with temperature, demonstrating that hydride cracking resistance is enhanced with temperature. Nonetheless, the crack growth rate (CGR) had a positive temperature dependence below 300 degrees C, showing that at temperatures below 300 degrees C, the CGR is governed
by diffusion-controlled hydride growth. At higher temperatures above 300 degrees C, however, the CGR decreased rapidly, suggesting that the CGR is dictated not by the hydride growth rate but by the hydride cracking rate. This suggestion is evidenced by experiments
BGJ398 supplier where the threshold stress intensity factor for DHC or K(IH) increased sharply above 300 degrees C.”
“Several iron-related parameters have been reported to show significant heritability, and thus, seemed to be genetically regulated. A genome wide family-based study revealed two regions that showed a linkage signal with transferrin receptor levels. The aim of the study was to identify genetic markers associated with iron status biomarkers. Ten SNPs selected from the literature were tested, and parameters related to iron metabolism were analysed, in a group (n = 284) of Spanish women. Data were analyzed using Bayesian Model Averaging (BMA) test and decision trees. The rs1375515, located in an intronic region of the calcium find more channel gene CACNA2D3, showed strong associations with levels of mean corpuscular volume according to BMA test, and with levels of haemoglobin and ferritin according to decision trees. The allele G was associated to low levels of these parameters which suggests higher iron deficiency anaemia risk. This SNP along with the
C282Y mutation explained significant differences in the distribution of individuals in three iron-related clinical phenotypes (normal, iron deficient and iron deficiency anaemic). In conclusion, the rs1375515, or other genetic polymorphisms in linkage, may play important roles in iron status, probably by affecting the function of a calcium channel. Selleckchem Small molecule library These findings may be useful for further investigation in the etiology of iron diseases.”
“Poly(p-phenylene vinylene) (PPV) nanofibers with disordered, helical, and yarn morphologies were controllably prepared by the electrospinning of a cationic polyelectrolyte precursor in an ethanol solution followed by thermal conversion. Through the tuning of the precursor solution properties and processing variables, the factors affecting the morphology of PPV fibers were studied. The diameter of these PPV nanofibers decreased with a decrease in the precursor concentration, and gradual blueshifts and changes in the relative intensity of the vibronic components in photoluminescence spectra were observed.