5,814 research outputs found
Sex differences in the content of beta-endorphin and enkephalin-like peptides in the pituitary of obese (ob/ob) mice.
No full textReconstitution of the filamentous backbone of lens beaded-chain filaments from a purified 49kD.
No full textDETECTION OF CUTTING-TOOL FRACTURE BY DUAL SIGNAL MEASUREMENTS
No full textFracture of a cutting tool is one of the most serious problems in machining systems. As a result, several methods have been proposed to detect cutting tool fracture. However. most of these have some problems from the viewpoint of practical application. In this study, the feasibility of using acoustic emission (AE) and cutting force signals for the detection of massive tool breakages as well as small fractures of the cutting tool were investigated, Turning experiments were performed using conventional carbide insert tools under realistic cutting conditions where S45C steel and the heat treated S45C steel were used as workpieces. The signal characteristics of the AE and cutting force components for the fracture of cutting tools were illustrated. The fracture of cutting tools was successfully detected through the analysis of these dual signals in the several types of tool fracture
Lysophospholipids increase ICAM-1 expression in human umbilical cord vein endothelial cells through a Gi- and NFkB-dependent mechanism.
No full textComparison of platinum-iridium bimetallic catalysts supported on γ-alumina and HY-zeolite in n-hexane reforming reaction
No full textThe characteristics and activity, selectivity and stability of Pt-Ir bimetallic catalysts supported on gamma-Al2O3 and HY-zeolite were examined using hydrogen chemisorption on catalysts calcined at different temperatures as well as by catalyst performance for n-hexane reforming at 573-773 K and atmospheric pressure. All the catalysts used in this study were prepared by impregnation. The Pt-Ir/HY and Pt-Ir/Al2O3 calcined at 773 k did not exhibit severe oxidative agglomeration, in contrast to monometallic iridium catalysts, and their activity and selectivity in n-hexane reforming were quite different from those of monometallic platinum or iridium catalysts. The catalysts supported on HY-zeolite showed high activity for isomerization while gamma-Al2O3-supported catalysts had high activity for dehydrocyclization. Deactivation with reaction time was much more pronounced on HY-zeolite-supported catalysts. Pt-Ir catalysts supported on Al2O3 and HY showed high selectivity and activity to high-octane value hydrocarbons when the both metals were present in equal amount, 0.5 wt.-%. Especially the HY-zeolite-supported Pt-Ir bimetallic catalyst showed a good performance for producing high-octane hydrocarbons containing less amounts of aromatic compounds. It may be concluded that the nature of the support greatly affected the catalytic properties of Pt-Ir bimetallic catalysts for n-hexane reforming
Bcl-2 overexpression prevets apoptosis-induced Madin-Darby canine kidney simple epithelial cyst formation.
No full textIntermediate filament associated protein. In: cellular and molecular biology of intermediate filaments.
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Different distribution of two intermediate filament-associated proteins, IFAP-300kD and IFAP-70/280kD, in BHK-21 cells.
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