Union Carbide, USA

Corundum (a-aluminium oxide), specified to contain > 99% AI2O3, purchased from Union Carbide (USA). The sample was washed six times in deionized water in order to eliminate the traces of some interfacial impurities. It was subsequently dried at 433 K in a vacuum dryer for 30 hrs [54]. 

For preparation of the GOD electrode a highly porous graphite foil of 1 mm thickness (Union Carbide, USA) is oxidized in air at 100°C. A 0.1 mol/1 l,l -dimethylferrocene solution in toluene is dropped onto the electrode and the solvent allowed to evaporate. GOD is covalently bound to the oxidized carbon surface by carbodiimide coupling and the surface is covered by a polycarbonate membrane of 0.03 pm thickness. Before use, the electrode is conditioned in 7 mmol/1 glucose solution for 10 h with an applied potential of + 160 mV. 

Company Air Products USA Ashland USA Dow USA DuPont USA Eastman USA PPG Industries USA Union Carbide USA Methanex Canada Number USA/Canada %yes Number Grand total % yes ... 

H-Y and H-Mordenite samples were obtained commercially from Union Carbide, USA, and Norton, USA, respectively. 

The industrial production of polysulfones based on 2,2-bis-(4oxyphenyl) of propane and 4,4 -dichlorbisphenylsulfone was started by company Union Carbid (USA) in 1965 [146]. 

Carbowax n. Poly(ethylene glycol), manufactured by Union Carbide, USA (now Dow Chemical). 

The azeotropic composition of the excess isotherm determined on Chemviron (Union Carbide USA) activated carbon, an adsorbent with a large specific surface area, is x = 0.095, indicating that the adsorption layer still contains a little methanol (Fig. 9). This methanol is bound to the polar regions of the surface of the adsorbent, as shown by the exothermic heat effect detectable from Xi = 0 to Xi = 0.1. 

Syntheses and properties of PES s were explored in the 1960 s by Union Carbide (USA), 3 M Corp (USA), and ICl pic (UK) [99-101]. Nearly at the same time. Two quite different synthetic strategies were elaborated, namely a Friedel-Crafts type polysulfonylation process (see Formula 6.5) and a nucleophilic substitution of 4,4 -... 

---