We report a photoelectron spectroscopy and density functional theory (DFT) study on the electronic and structural properties of Nb(3)(-), Nb(3)O(-), Nb(3)O(2)(-), and the corresponding neutrals. Well-resolved photoelectron spectra are obtained for the anion clusters at different photon energies and are compared with DFT calculations to elucidate their structures and chemical bonding. We find th...

Microcompression tests were performed on the Al/Nb multilayers of incoherent interfaces with the layer thicknesses of 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb. The Al-Nb multilayers showed increase in strength as the layer thickness was reduced; the average flow stresses at 5% plastic strain from the 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb layer thickness specimens were determined to be 2.1 GPa and ...

In this paper we map out the 1300 8C isothermal section in the Nb–Sn–C ternary system. The results show that the only ternary compound in the system, Nb SnC, is in equilibrium with Sn, NbC , and Nb Sn, but not with Nb, Nb C or C. The Nb SnC phase is not a 2 x 3 2 2 stoichiometric compound but exists over a range of compositions that range from an Nb:Sn:C ratio of |54:22:24 at.%, when in equilib...

Neuroblastoma (NB) is one of the most common pediatric malignancies in children. Abnormal activation of receptor tyrosine kinases contributes to the pathological development of NB. Therefore, targeting tyrosine kinase receptors to cure NB is a promising strategy. Here, we report that a multi-targeted tyrosine kinase inhibitor ponatinib inhibited NB cell proliferation and induced NB cell apoptos...

BACKGROUND Failed visualization of the fetal nasal bone (NB) by ultrasound at 11 - 14 weeks of gestation is strongly associated with chromosomal abnormalities. Meanwhile, the incidence of the absent fetal NB in normal fetuses in the first trimester in mothers of different ethnic origins differs significantly. It is, therefore, important to assess ethnic variations in the first-trimester visuali...

This retrospective, descriptive study aimed to assess hematologic testing practices in 100 patients with preeclampsia undergoing neuraxial blockade (NB). Prior to NB, platelet (PLT) count was performed in 61 (98%) of 62 women in labor and in 37 (97%) of 38 women undergoing cesarean delivery (CD). No patients had a pre-NB PLT count <70 × 10(9)/L. Pre-NB tests for prothrombin time (PT) and activa...

In the title compound, [Nb(CH(3)O)(2)(C(5)H(7)O(2))Cl(2)], a slightly distorted octa-hedral coordination geometry is observed around the Nb(V) atom with Nb-O distances in the range of 1.8254 (16)-2.0892 (16) Å and Nb-Cl distances of 2.3997 (14) and 2.4023 (12) Å. The O-Nb-O angles vary between 81.36 (7) and 172.65 (7) °, while the trans Cl-Nb-Cl angle is 167.34 (2)°. There are no hydrogen bonds...

A hexagonal oxynitride (Li(0.88)□(0.12))Nb(3.0)(O(0.13)N(0.87))(4) was synthesized through ammonia nitridation of LiNb(3)O(8). The structural analysis revealed that this oxynitride consists of alternate stacking of octahedral and prismatic layers with different Li/Nb ratios: significant amounts of Li and Nb atoms (Li/Nb = 43/57) coexist in the octahedral layer, while the prismatic site is prefe...

The role of ankyrin in the formation and stabilization of the spectrin-based skeletal meshwork and of band 3 oligomers was studied by characterizing, in nb/nb mouse red cells, the effect of ankyrin deficiency on skeletal ultrastructure, band 3-skeleton associations, and band 3 oligomeric states. Despite severe ankyrin deficiency, nb/nb mouse red cell skeletal components formed a relatively unif...

Since the acute toxicity of nitrobenzene (NB) in rats has not been characterized, experiments were performed to ascertain the possible deleterious effects of NB in different tissues of the male Fischer-344 rat. Rats were given single oral doses of NB (50-450 mg/kg) and at the time of sacrifice, 25 tissues were removed and examined histologically by light microscopy. Histopathological changes in...