Philips PowerLife GC2910/20.
Bàn ủi hơi nước Philips GC2960 nhiều tính năng hiện đại sẽ là trợ thủ đắc lực cho bạn chăm sóc quần áo cho cả gia đình. Mặt đế ...
Se muestra como se derrite una pletina del termostato con chisporroteos y luego nos quejamos de los chinos, pero esta plancha ...
MODIFICATION OF THE GLASS-LIKE CARBON SURFACE PROPERTIES BY ION IRRADIATION
Z. Lausevi,a N. Bibi,a L. Masotti,b E. Pagnottab and M. Lausevic a Vinca Institute of Nuclear Sciences, Belgrade, P.O. Box 522, 11001 Belgrade, Yugoslavia b Interdepartmental Center of Biotechnological Research, University of Bologna, Via Irnerio 48, 40126 Bologna c Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Yugoslavia Introduction
Glass-like carbon (GC) is the polymeric form of carbon1 produced from the precursor polymer by the progressive coalescence of stabilized polymer chains in the temperature region between 400 and C. The association and linkage of the polymer chains and the consequent material properties, can be modified during the carbonization process2 in which precursor material pyrolysis occurs and/or by introduction of the heteroatoms into the material prior3 or after4, 5, 6 carbonization. The possibility of preparing GC with controlled structural and surface properties is ...
Catalysis Today, 16 (1993 ) 537-546 Elsevier Science Publishers B.V., Amsterdam
The oxidative coupling of methane and the oxidative dehydrogenation of ethane over a niobium promoted lithium doped magnesium oxide catalyst
H.M. Swaan', Y. Li2, K. Seshan', J.G. Van Ommen' and J.R.H. Ross3 `rFacuity of Chemical Technology, University of Twente, P.O. Box 217, 7508 AE Enschede, The Netherlands. aTianjin University, Department of Chemical Engineering, Tianjin 300072, P. R. China. `University of Limerick, Department of Industrial Chemistry and Life Sciences, Limerick, Ireland.
The promoting effect of niobium in a Li/MgO catalyst for the oxidative coupling of methane (OCM) and for the oxidattve dehydrogenation of ethane (ODHE) has been studied in some detail. it has been found that a Li/Nb/MgO catalyst with 16 wt % niobium showed the highest activity for the C, production in the OCM reaction; the activity at 600 "C was ten times that of the Li/MgO catalyst at the same temperature. The Li/Nb/MgO catalyst ...
Wednesday, April 29, 2015
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Accessories Tray Desk Set Organizer (Ladies Wallet) Travel Wallet (Toiletry Case) Trolley Bag Ladies Handbag Ladies Wallet Ladies Hand Bag & Wallet Set Lipstick Case Note Pad,Ladies Wallet & Lipstick Case Card Holder Men's Wallet Card Holder, Mens Wallet & Note Pad
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Parker Vector XL Parker Jotter SSGT (FP+BP) Set Cross ATX Medalist (Silver /Gold) - Ink Pen Cross ATX Medalist (Black/Silver) - Ink Pen Cross Century 2 - Ball Pen (Silver) Cross Century 2 - Ball Point Cross Century 2 - Ball Point - 14k Gold Cross ATX Medalist - Ball pen PortfolioBlack Personal Agenda (with cross pen) Passport Case Prelude - Fountain Pen ...