Search Results

You are looking at 161 - 170 of 172 items for :

  • Refine by Access: All Content x
Clear All

Introduction Hydrodesulfurization (HDS) is a common technique used to remove organic sulfur compounds from crude oil. HDS is generally performed with molybdenum and tungsten sulfides supported on alumina and promoted by group

Restricted access

mass spectrometer. With this system coupled with Li + IAMS, it is possible to detect many chemical species at atmospheric pressure, including radical intermediates, on an EGA basis. The IIF used as the heat source consists of two tungsten lamps. The

Restricted access

artwork. The investigation has been performed by monitoring the increase of the surface temperature during the application of a stepped heating pulse. The painting was heated for 2 min at low power using two tungsten 6 kW lamps, leading to a temperature

Restricted access

hydrophosphate and the magnesium sulfate, and then, an insoluble ammonium magnesium sulfate would be obtained. Another good example is the case of precipitating mixture of oxides of tungsten and tin from their soluble salts [ 11 ]. Since these flame retardants

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Dragica M. Minić, Maja T. Šumar-Ristović, Đenana U. Miodragović, Katarina K. Anđelković, and Dejan Poleti

, Beaver , M , Benotti , M , Powers , F , Ziegler , CJ . Preparation and characterization of d6 tungsten compounds with amino acid derivatized diimine ligands and preparation of dipeptide derivatives using peptide coupling agents . J Organomet Chem

Restricted access

with a tungsten cathod operating at 200 kV. The sample was dispersed in n -octane by sonication, dropped on a carbon-coated copper grid and dried for observation. Textural analyses were performed using a Thermofinnigan Sorptomatic 1990

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Alexandre Berche, Pierre Benigni, Jacques Rogez, and Marie-Christine Record

-stamped from a tantalum sheet with a thickness of 0.25 mm and supplied by Technicome. They were filled in and sealed by Tungsten Inert Gas welding, under argon atmosphere in a glove box. Samples were then heated up to 1,250 K for 10 min to get a

Restricted access
Central European Geology
Authors: Máté Zsigmond Leskó, Richárd Zoltán Papp, Boglárka Anna Topa, Ferenc Kristály, Tamás Vigh, and Norbert Zajzon

 g homogenized bulk sample. The homogenized mixture was pressed with a 25-ton pneumatic press (Vaneox, Bedburg-Hau, Germany). For the XRF and bulk XRPD, the samples were crushed: first 6 g bulk sample was crushed in a tungsten carbide breaking

Open access
Journal of Thermal Analysis and Calorimetry
Authors: Simona Zlá, Bedřich Smetana, Monika Žaludová, Jana Dobrovská, Vlastimil Vodárek, Kateřina Konečná, Vlastimil Matějka, and Hana Francová

-007-9090-0 . 16. Ojo , OA , Richards , NL , Chaturvedi , MC 2006 Study of the fusion zone and heat-affected microstructures in tungsten inert gas-welded INCONEL 738LC superalloy . Metall Mater Trans 37A : 421 – 433 10.1007/s11661

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: S. X. S. Costa, M. R. Galvão, D. P. Jacomassi, M. I. B. Bernardi, A. C. Hernandes, A. N. de Souza Rastelli, and M. F. Andrade

polymerization, causing material hardening [ 7 – 9 ]. This light can be emitted by light-curing units (LCUs), such as conventional quartz tungsten halogen (QTH), xenon plasma arc (PAC), argon laser and light-emitting-diodes (LEDs) [ 10 ]. LED LCUs were

Restricted access