At (100) orientation, it increases linearly with increasing ion flux or energy. The findings are discussed on the basis of atomistic mechanisms of interstitial diffusion, potential lattice distortions, local decomposition, and ion-induced lattice vibrational excitations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3646493]“
“Uric
acid (UA) is an endogenous antioxidant. Some studies have described that multiple sclerosis (MS) patients have lower serum UA levels than controls, although it has not been established whether UA is primarily deficient, learn more or secondarily reduced due to its scavenging activity. UA has also been proposed as an indicator of disease activity. We, retrospectively, reviewed 478 serum UA levels obtained in 94 MS patients. Ninety samples were collected during a relapse. Correlation between UA levels obtained during a relapse or in a relapse-free period, and comparison between UA and expanded disability status scale (EDSS) score was tested using a two-tailed Student’s t test and Spearman correlation coefficients test. UA levels were significantly lower when measured during a relapse (n 90) than in a remission period (n 368) (r -0.16, p 0.003) UA levels measured outside a relapse inversely correlated with EDSS score (r -0.15, p 0.001). Lower uric acid levels in MS patients are associated with clinical relapse. This is the first description of an
inverse correlation of serum UA levels with disability as assessed by EDSS score.”
“Nonflammability of the thermoplasticized crosslinked polyethylene (PE)/polyolefin elastomer (POE)/metal hydroxide flame Elacridar retardant/compatibilizer composites were investigated. The thermoplasticized crosslinked PE was decrosslinked from the crosslinked high-density PE
under the supercritical methanol condition. Two types of metal hydroxides: aluminum hydroxide (AH) and magnesium hydroxide (MH), and a low-density polyethylene-g-maleic anhydride (LM) were used as flame retardants and a compatibilizer, see more respectively. Nonflammability of both PE/POE/AH/LM and PE/POE/MH/LM composites was enhanced with metal hydroxide flame retardant concentration. PE/POE/MH/LM composites had better nonflammability than PE/POE/AH/LM composites at the same flame retardant concentration. Interestingly, nonflammability of the composites was also strongly influenced by the compatibilizer concentration. At low compatibilizer concentration, the nonflammability of the PE/POE/MH/LM composites was improved with the compatibilizer concentration. In contrast, at high compatibilizer concentration, the nonflammability of the PE/POE/MH/LM composites was deteriorated with the compatibilizer concentration. This demonstrates that optimum concentration of the compatibilizer can help to enhance the efficiency of the flame retardants in the development of the nonflammable polyolefin for the wire and cable industry. (C) 2011 Wiley Periodicals, Inc.