The carcinogenicity of i.v. nickel carbonyl, Ni(CO)4, was tested in Sprague-Dawley rats. In 72 rats (Group A) that survived a single 50% lethal dose injection of Ni(CO)4 (2.2 mg nickel per 100 g), the incidence of malignant tumors (8.3%) was not significantly greater than the incidence in 47 rats in the control group (4.3%). In 121 rats (Group B) that survived six 5% lethal dose injections of N...

Abundances of 11 chemical elements have been determined for 29 F and 19 A dwarfs (“normal” and chemically peculiar with apparent rotational velocities ranging from 11 to 237 km.s−1) members of the Hyades cluster using Takeda’s (1995) iterative procedure well suited for fast rotators. High quality spectra of high to moderate resolution have been synthesized to derive the apparent rotational velo...

Single crystalline and polycrystalline CoxNiyGa100-(x+y), 41<xCo<62 and 19.3<xNi<32.7 [at%], Ferromagnetic Shape Memory Alloys (FMSMAs) have been produced in the range of the Heusler-type composition. Elasto-mechanical properties have been analyzed for the annealed and quenched states, respectively. The mechanical spectroscopy data show the occurrence of martensitic phase transformations with t...

7 ABSTRACT: NaBH4 has long been identified as a viable hydrogen-storage 8 material due to a theoretical gravimetric H2 capacity of 10.6 wt %. Because of 9 the high enthalpy of decomposition of 108 ± 3 kJ mol−1, thermal 10 decomposition of the pristine material does not occur until at least 500 °C, 11 and thus NaBH4 has yet to be utilized in hydrogen-storage processes. In this 12 study, NaBH4 ha...

Long-lived goal reasoning systems that reason over their history confront the bounding problem–the impracticality of reasoning over a large, ever-growing experience-base. This is a problem with some explanation systems that use the history of their observations to inform beliefs about the current state of the world. We propose to apply narrative intelligence (NI), which includes the ability to ...

transport by the human Na ϩ /Ca 2ϩ exchanger expressed in Sf 9 cells. Am. block of the Na ϩ /Ca 2ϩ exchanger was examined in Sf 9 cells expressing the human heart Na ϩ /Ca 2ϩ exchanger (NCX1-NACA1). As predicted from the reported actions of Ni 2ϩ , its application reduced extracellular Na ϩ-dependent changes in intracellular Ca 2ϩ concentration (measured by fluo 3 fluores-cence changes). Howeve...

the major aim of the present study was to investigate element (fe, ni, pb, v, zn) concentrations in sediment and different tissues of phragmities australis and typha latifolia in hor al-azim wetland southwest iran. sampling of sediments and aquatic plants was carried out during spring and summer 2014. results showed that the mean  concentrations of elements in phragmities australis  in root and...

This paper describes a study of excited-state properties of naphthalimide (NI) and four 4-substituted derivatives: 4-chloronaphthalimide (Cl-NI), 4-methylthionaphthalimide (MeS-NI), 4-nitronaphthalimide (O(2)N-NI), and 4-(N,N-dimethylaminonaphthalimide (Me(2)N-NI). Steady-state absorption and fluorescence spectra were collected in solvents of varying polarity to determine the excited-state char...

Five Ni-Cr alloys were studied in order to identify the compounds formed on the alloy surface during oxidation under conditions similar to those encountered during dental laboratory procedures prior to application ofporcelain. After the alloys were oxidized, the films covering the surfaces were removed with the aid of a Br-methanol solution. X-ray diffraction was used to analyze the compounds f...

According to the nullor-mirror descriptions of OTA, the NAM expansion method for three different types of KHN filters employing OTAs is considered. The type-A filters employing five OTAs have 32 different forms, the type-B filters employing four OTAs have 32 different forms, and the type-C filters employing three OTAs have eight different forms. At last a total of 72 circuits are received. Havi...