(C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 3752-3757,
2011″
“First-principles calculations are performed to study the structural, electronic, and magnetic properties of pure and C-doped GaN nanoribbon with both zigzag edge (ZGaNNR) and armchair edge (AGaNNR). With increasing ribbon width, both the indirect bandgap of ZGaNNR and the direct bandgap of AGaNNR decrease monotonically and become closer to each other approaching their asymptotic limit of a single layer of GaN sheet. One C atom substituting for one N atom causes a slight local expansion, while one C atom substituting https://www.selleckchem.com/products/cobimetinib-gdc-0973-rg7420.html for one Ga atom results in a large local contraction. BV-6 Furthermore, the C atom is preferred to substitute for an edge N or Ga atom in either 6-ZGaNNR or 6-AGaNNR, especially edge Ga atoms in 6-AGaNNR. There exists about 0.65 mu(B) magnetic moment, which arises mainly from doped C atom while a single N atom is substituted by one C atom in either 6-ZGaNNR or 6-AGaNNR, which may open a way to design magnetic nanodevices based
on GaNNR. (C) 2011 American Institute of Physics. [doi:10.1063/1.3587161]“
“Materials and methods: Adherent thyroid cells were irradiated following incubation with the mediators methimazole and perchlorate using either X-ray tube or Re-188-perrhenate. DNA damage was quantified by OTM (Olive’s tail moment) of the alkaline comet assay.
Results: Following external irradiation of 15 Gy OTM was 4.3 +/- 4.2 compared to 0.5 +/- 1.4 in controls. DNA damage was reduced by methimazole to 70%. Incubation with Re-188 showed effects depending on presence of the mediators. Non-irradiated selleck chemical controls had a mean OTM < 1, internal irradiation increased OTM to 25.5 +/- 9.1 in cells without mediators. OTM decreased to 60% after pre-incubation with methimazole and to 15% with perchlorate. Re-188 uptake was modified by both perchlorate and, to a lesser extent, methimazole.
Conclusions: Methimazole was
shown to have a radioprotective effect not only by its scavenger capacity but also by interaction with NIS. Perchlorate acted by competitive inhibition of NIS mediated Re-188 uptake.”
“This article presents the developmental process of a new tactile sensor. The sensor was based on the use of light-emitting diode (LED) phototransistor couples and a silicone rubber layer positioned above the optoelectronics devices. The optoelectronic components were organized in a matrix structure. For each couple, the LED illuminated the reflective surface, which coincided with the bottom facet of the deformable layer. Practically, the deformable layer transduced an external force into a displacement variation of its bottom facet through its stiffness.