Authors:C. Munteanu, M. Caldararu, V. Bratan, P. Yetisemiyen, G. Karakas, and N. I. Ionescu
electrodes supported on a frit, embedded in a Pyrex glass tube and connected by tungsten wires, to a precision RLC bridge [ 24 ]. The catalyst (1.5 cm 3 ) powder (fraction between 0.25 and 0.5 mm) was filling the annular space between the electrodes
Authors:Seval Koç, Nil Toplan, Kenan Yildiz, and H. Özkan Toplan
diameter of the tungsten carbide (WC) balls were 200 g and 100 mm, respectively; the grinding bowl was 250 mL WC; the grinding times were 0, 1, and 2 h; the speed of the main disk was 600 rpm; and the grinding process was dry.
The X-ray diffraction
Authors:Kelly C. Teixeira, Gabriela F. Moreira, Welber G. Quirino, Cristiano Legnani, Raigna A. Silva, Marco Cremona, Hermi F. Brito, and Carlos A. Achete
deposited by thermal evaporation in tungsten crucibles with a controlled growth rate of about 0.1–0.3 nm s −1 under high vacuum and with a base pressure around 9 × 10 −6 Torr. The photoluminescent spectra of the deposited thin films were recorded at room
34 ] in water with hydrogen peroxide. When the fresh catalyst was treated with H 2 O 2 , the structure of the catalyst changed into active tungsten-peroxo intermediate. The active intermediate was responsible for the oxidation of alcohols to the
Authors:Yazhen Wang, Libo Wang, Jie Chen, Sihan Wang, Yulin Yang, and Qian Chen
using a catalyst comprising a source of chromium, molybdenum or tungsten and a ligand containing at least one phosphorous, arsenic or antimony atom bound to at least one (hetero)hydrocarbyl group: WO, 02/004119 . BP Chemicals Ltd , Saltend
] heat treatment, treatment of the weld edge by Tungsten Inert Gas (TIG) or plasma arc melting, hammering, shot peening, ultrasonic treatment.
Welding in an elastically pre-bent state in a clamping device
Authors:Changlin Yu, Caifeng Fan, Xiangjie Meng, Kai Yang, Fangfang Cao, and Xin Li
degradation of different dyes in an aqueous solution under visible light irradiation. According to the literature test method [ 3 ], a 300-W tungsten lamp was positioned inside a cylindrical Pyrex vessel surrounded by a circulating cooling water jacket and a