The magnetic characterization indicates that with increasing the particle size, the antiferromagnetic (AFM) transition temperature increases from 50 to 70 K. Further analysis suggests that the rising
of AFM transition temperature with the increasing particle size should be from the structural origin, in which the strength of AFM interaction is dependent on the in-plane lattice parameters. Furthermore, with a decrease in INCB024360 manufacturer particle size, the Mn-spin reorientation temperature (T-SR) is enhanced from 39 to 43 K. These results show an important coupling between the Mn3+ and Ho3+ ion spins as well as a T-SR that is driven by the cooperative MnO5 site rotation. (C) 2011 American Institute of Physics. [doi:10.1063/1.3556945]“
“Background: Vitamin E supplementation may be a potential strategy to prevent respiratory tract infections (RIs) in the elderly. The efficacy of vitamin E supplementation may depend on individual factors including specific single nucleotide polymorphisms (SNPs) at immunoregulatory genes.
Objective: We examined whether the effect of
vitamin E on RIs in the elderly was dependent on genetic backgrounds as indicated by SNPs at cytokine genes.
Design: We used data and DNA from a previous vitamin E intervention study (200 IU vitamin E or a placebo daily for 1 y) in elderly nursing AZD9291 mouse home residents to examine vitamin E-gene interactions for incidence of RI. We determined the genotypes of common SNPs at IL-1 beta, IL-2, IL-6, IL-10, TNF-alpha, and IFN-gamma in 500 participants. We used negative binomial regression to analyze the association between genotype and incidence of infection.
Results: The effect of vitamin E on lower RI depended on sex and the SNP at IL-10 -819G–>A (P = 0.03 BKM120 nmr for interaction for lower RI). Furthermore, we observed that subjects with the least prevalent genotypes at IL-2 -330A–>C (P = 0.02 for upper RI), IL-10 -819G–>A (P = 0.08 for upper RI), and IL-10 -1082C–>T
(P < 0.001 for lower RI in men) had a lower incidence of RI independent of vitamin E supplementation.
Conclusions: Studies that evaluate the effect of vitamin E on RIs should consider both genetic factors and sex because our results suggest that both may have a significant bearing on the efficacy of vitamin E. Furthermore, common SNPs at cytokine genes may contribute to the individual risk of RIs in the elderly. This trial was registered at clinicaltrials.gov as NCT00758914. Am J Clin Nutr 2010; 92: 106-14.”
“Complex permittivity and permeability of FeCo/carbon nanotubes (CNTs)-paraffin composites have been investigated at microwave frequencies between 2 and 18 GHz. Percolation threshold PC of about 34 wt. % is determined in the present system by AC conductivity measurements. Microwave absorption of FeCo/CNTs-paraffin composites is enhanced when the mass ratio of the fillers approaches PC.