Moreover, our results show that the device containing carbon nanotubes with large length and diameter can produce the current with 100% spin polarization, which is essential for spintronic devices. Physical mechanisms and the comparison with the results of graphene are also discussed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3510537]“
“PURPOSE:

To evaluate intraocular lens (IOL) power calculation using a new optical low-coherence reflectometry (OLCR) biometer and compare the results with those obtained with a partial coherence interferometry (PCI) optical biometer.

SETTING: International Vision Correction Research Centre, Department BMS-777607 of Ophthalmology, University of Heidelberg, Heidelberg, Germany.

METHODS:

Biometry measurements in eyes of cataract patients were performed by the same examiner with an OLCR biometer (Lenstar LS 900/Allegro Biograph) and a PCI optical biometer (IOLMaster). After determination of axial length (AL), corneal radii values by keratometry (R1 and R2), and anterior chamber depth (ACD), power calculation for an AcrySof MA60AC IOL was compared between the 2 devices using 4 formulas and the corresponding IOL constants. The target was emmetropia.

RESULTS: One hundred eyes of NCT-501 order 100 cataract patients (mean age 70.0 years +/- 10.6 [SD]) were measured. Of the biometry parameters, the only statistically significant differences between the 2 devices were in R2 (mean difference 0.02 +/- 0.05 mm), (R1 + R2)12 (mean difference 0.01 +/- 0.04 mm), and ACD (mean difference 0.05 +/- 0.11 mm) (P<.01, Wilcoxon test). The mean differences in IDL power calculations using the 4 formulas were not statistically significant between the 2 devices (P>.01, Wilcoxon test).

CONCLUSION: The OLCR biometry device provided precise and valid measurements

and thus can be used for the preoperative examination of cataract patients.”
“Polyester (PET), cotton (COT), and two relative blend textile fabrics were treated by sol-gel processes. Tetraethoxysilane (TEOS) was used as inorganic selleck compound precursor of silica phases; furthermore, different TEOS/H(2)O ratios were examined to explore the effect of the presence of SiO(2) on the thermal and fire stability of the textile fabrics investigated. The distribution and dispersion of SiO(2) were observed by means of scanning electronic microscopy (SEM). SEM magnifications showed the formation of a continuous silica film located in the neighboring fibers; furthermore, in the case of PET, such a film incorporated silica particles with an average diameter ranging between 0.2 and 6 mu m.