TTC and CuPc films are characterized by atomic force microscopy and x-ray diffraction. TTC forms a highly crystalline layer that passivates electron traps on the SiO(2)
surface very efficiently and serves as a template for the growth of CuPc films with significantly improved crystallinity. High electron mobilities comparable to the values reported on single JNK-IN-8 price crystals are reached. We show that the contact resistance for hole transport as determined by the transmission line method can be reduced considerably by using organic charge-transfer complexes as top contacts in OFETs based on CuPc. (c) 2010 American Institute of Physics. [doi:10.1063/1.3354086]“
“Background: Age-related reductions in serum dehydroepiandrosterone (DHEA) concentrations may be involved in bone mineral density (BMD) https://www.selleckchem.com/products/cilengitide-emd-121974-nsc-707544.html losses.
Objective: The objective was to determine
whether DHEA supplementation in older adults improves BMD when co-administered with vitamin D and calcium.
Design: In year 1, a randomized trial was conducted in which men (n = 55) and women (n = 58) aged 65-75 y took 50 mg/d oral DHEA supplements or placebo. In year 2, all participants took open-label DHEA (50 mg/d). During both years, all participants received vitamin D (16 mu g/d) and calcium (700 mg/d) supplements. BMD was measured by using dual-energy X-ray absorptiometry. Concentrations of hormones and bone turnover markers were measured in serum.
Results: In men, no difference between groups occurred in any BMD measures or in bone turnover markers during year 1 or year 2. The free testosterone index and estradiol increased in the DHEA group only. In women, spine BMD increased by 1.7 +/- GW786034 chemical structure 0.6% (P = 0.0003) during year 1 and by 3.6 +/- 0.7% after 2 y of supplementation in the DHEA group; however, in the placebo group, spine BMD was unchanged during year 1 but increased to 2.6 +/- 0.9% above baseline during year 2 after the crossover to DHEA. Hip BMD did not change. Testosterone, estradiol, and insulin-like growth factor 1 increased in the DHEA group only. In both
groups, serum concentrations of bone turnover markers decreased during year 1 and remained low during year 2, but did not differ between groups.
Conclusion: DHEA supplementation in older women, but not in men, improves spine BMD when co-administered with vitamin D and calcium. This trial was registered at clinicaltrials.gov as NCT00182975. Am J Clin Nutr 2009;89:1459-67.”
“Nanocomposite CoFe-MgO films, where magnetic CoFe grains are embedded into an insulating MgO matrix, show a pronounced correlation between the tunneling magnetoresistance (TMR) and the magnetorefractive effect properties. The effect is due to the contribution of the spin-dependent conductivity to the optical conductivity of the films.