Upali Siriwardane

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We reported the effect of carbon coating on the changes in properties of the ultra-high-molecular-weight polyethylene standard material (Hospital for Special Surgery) alter gamma irradiation in air and storage for 2 years. The coating showed a slight improvement in crystallinity (X-ray) and tensile properties (under cyclic loading) over the uncoated and(More)
Laser Induced Solution Deposition (LISD) is essentially a laser chemical processing with similar mechanism of the counterpart laser chemical vapor deposition (LCVD). It is a novel method for synthesizing nanocsale particles or thin films with the combined advantages of laser chemical vapor deposition and electroless chemical deposition in solution(More)
Titanium alloy (ASTM F-136) rods were coated with hydroxyapatite (HA) of 3 levels of crystallinity, which were determined by X-ray diffraction (XRD) analysis to be 60.5%, 52.8%, and 47.8%. Fourier Transform Infrared (FTIR) spectroscopy analysis showed the removal of the hydroxyl and carbonate groups as compared to the original HA powder. It appears that(More)
aldehydes to produce the desired allylic alcohol^.'^ Presence of a donor ligand on nickel such as triphenylphosphine proved to accelerate the homo-coupling of alkenyl triflates.20 For example, addition of a catalytic amount of NiCI2(PPh3)> (5 mol % of CrCI2) instead of NiC12 in the reaction of triflate 1 and benzaldehyde under the same condition described(More)
The title compound (I) was prepared as a potential cross-linking reagent for nucleic acids and/or proteins. The compound is a stable, but reactive, crystalline solid which can be stored indefinitely upon adequate protection. The reagent reacts with amine nucleophiles - primary, secondary as well as heterocyclic - to afford bis-enamines. C8H8N2O4S, Mr =(More)
TITLE PAGE Report Title: “Novel Preparation and Magneto Chemical Characterization of Nanoparticle Mixed Alcohol Catalysts” Type of Report: Final Technical Report Reporting Period Start Date: 09/01/2000 Reporting Period End Date: 02/28/2005 Principal Author: Seetala V. Naidu Date Report was Issued: May 24, 2005 DOE Award Number: DE-FG26-00NT40836 Name and(More)
Nanoparticle Fe/Co/Cu loaded mesoporous γ-Al2O3 spherical (~ 1 mm diameter) catalyst granules were prepared by three sol-gel/oil-drop methods: 1) nanoparticle-metaloxide, 2) metal-nitrate-solution, and 3) metal-ion-wet-impregnation. The granules were characterized by EDX, BET surface area, DTA/TGA, XRD, SEM, EDX and TEM. Thermal analysis of(More)
The reaction of ZrC4 with ~Z~SO-~~~-L~(THF)-~-N~(THF)-~-(S~M~~)-~-(R)-~,~-CZB~H~ (R = SiMe3, Me, H) in a benzeneA'HF solvent mixture produced l-Cl-l-(THF)-2,2'-(SiMe3)2-3,3'(R)~-4,4',5,5'-Li(THF)-l,l'-commo-Zr(2,3-C~B4H4)2 (R = SiMe3 (I), Me (111, H (11111, in 68%, 61%, and 59% yields, respectively. Compound I was found to be resistant to chloride(More)