High-efficiency synthesis of nanoparticles in a repetitive multigap spark discharge generator

Technical Physics Letters - We describe a method of obtaining aerosol nanoparticles in a repetitive spark discharge generator with 12 interelectrode gaps between tin electrodes, which operates at a...     

Solubility of Uranovanadates AII(VUO6)2·nH2O (AII = Mg,Ca, Sr,Ba, Co,Ni, Cu,Pb) in Water and Aqueous Solutions

Solubility of uranovanadates A^II(VUO₆)₂·nH₂O (A^II = Mg, Ca, Sr, Ba, Co, Ni, Cu, Pb) in water and acid aqueous solutions under various conditions was studied. Based on these data, the standard Gibbs energies of formation of the uranovanadates were calculated, which would allow analysis of their state under conditions that were not studied experimentally.     

A specific light chain of kinesin associates with mitochondria in cultured cells

High-resolution two-dimensional gel electrophoresis (2-DE) and database analysis was used to establish protein expression patterns for cultured normal human mammary epithelial cells and thirteen breast cancer cell lines. The Human Breast Epithelial Cell database contains the 2-DE protein patterns, including relative protein abundances, for each cell line, plus a composite pattern that contains all the common and specifically expressed proteins from all the cell lines. Significant differences in protein expression, both qualitative and quantitative, were observed not only between normal cells and tumor cells, but also among the tumor cell lines. Eight percent (56/727) of the consistently detected proteins were found in significantly (P< 0.001) variable levels among the cell lines. Eight proteins present in normal cultured breast epithelial cells were not detected in any of the tumor cell lines. We identified a subset of the differentially expressed proteins using a combination of immunostaining, protein sequencing, comigration, and subcellular fractionation. These identified proteins include the intermediate filament components vimentin and cytokeratins. The cell lines can be classified into four distinct groups based on their intermediate filament protein profile. We also identified heat shock proteins; hsp27 and hsp60 varied in abundance and in some cases in the relative phosphorylation levels among the cell lines. Many of the differentially expressed proteins we identified have roles in cellular proliferation and differentiation, including annexin V, elongation initiation factor 5A, Rho GDP dissociation inhibitor, and prohibitin. We identified inosine-5-monophosphate dehydrogenase in each of the cell lines, and found the levels of this enzyme in the tumor cell lines elevated 2- to 20-fold relative to the levels in normal cells. These results expand the human breast epithelial cell protein database (http:// www.anl.gov/CMB/PMG) which is being built to assist researchers with the identification of abnormal patterns of expression and pathways associated with malignancy.     

Diene fraction from pyrolysis as a feedstock for the production of light-colored petroleum-polymer resins

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 2, pp. 5–6, February, 1993.     

Radiation damage to multi-walled carbon nanotubes and their Raman vibrational modes

The influence of the radiation damage to multi-walled carbon nanotubes (MWCNT) during the high-energy electron irradiation (E_e = 1.8 MeV) with different doses of absorption (D_n = 0.5; 1.0; 1.5 and 2.0 MGy) on their Raman vibrational spectra is studied in detail. The modification of both radial and tangential optical vibrations is observed depending on radiation dose. This is manifested both in the frequency shifts of the vibrational modes and in a change in the intensity of the Raman scattering, which corresponds to different optical vibrations. This behavior of Raman spectrum is explained by appearance and increase in the concentration of radiation defects and by seams of separate layers of nanotubes.