Impact of process parameters on L-glutaminase production by marine Vibrio costicola in solid state fermentation using polystyrene as an inert support

Process parameters influencing e-glutaminase production by marine Vibrio costicola in solid state fermentation (SSF) using polystyrene as an inert support were optimised. Maximal enzyme yield (157 U/g dry substrate) was obtained at 2% (w/w) t:glutamine, 35°C and pH 7.0 after 24 h. Maltose and potassium dihydrogen phosphate at 1% (w/w) concentration enhanced enzyme yield by 23 and 18%, respectively, while nitrogen sources had an inhibitory effect. Leachate with high specific activity for glutaminase (4.2 U/mg protein) and low viscosity (0-966 Ns/m 2) was recovered from the polystyrene SSF system

Ni catalyst on mixed support of CeO2-ZrO2 and Al2O3: Effect of composition of CeO2-ZrO2 solid solution on the methane steam reforming reaction

In this study, catalysts containing 5 wt.% Ni deposited on a support composed of a CeO2-ZrO2 solid solution deposited on alumina were tested in the steam reforming of methane. The supports, with various ratios of Ce to Zr, were prepared by co-precipitation of the oxide precursors, followed by calcination in synthetic air. The catalysts were then prepared by Ni impregnation of the supports. The prepared solids were characterized by temperature-programmed reduction with H-2 (TPR-H-2), in situ X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) spectroscopy. The XRD analysis confirmed the formation of a solid solution between ZrO2 and CeO2. In the catalytic tests, it was found that catalysts with higher Ce content did not exhibit deactivation during 6 h of reaction. The catalyst with highest Ce content, Ni(0.8Ce0.2Zr)AI, provided the best result, with the highest rate of conversion of methane and the lowest carbon deposition, which may be partly due to the smaller Ni-0 crystallites in this sample and also the segregated CeO2 particles may have favored H2O adsorption which could lead to higher C gasification. (C) 2012 Elsevier B.V. All rights reserved.

Unit maintenance, direct support, and general support maintenance repair parts and special tools lists : truck, lift, fork, electric, solid rubber tires, 2,000 pound capacity, Army model MHE-197, Baker model FTD-020-EE, NSN 3930-00-724-4058, 100 in. lift ....

"August 1992."

Unit, direct support, and general support maintenance repair parts and special tools lists : truck, forklift, electric, solid rubber tires, 6000 lb capacity, 180 in. lift (Drexel Dynamics model FL60-EE5600) (Army model MHE206), NSN 3930-00-935-7867.

"November 1992."

Direct support and general support maintenance repair parts and special tools lists : truck, lift, fork, gasoline, solid rubber tired wheels, 2000 lbs capacity Army model MHE 182, NSN 3930-00-958-3682, Allis-Chalmers model FT20-24PS-100 and NSN 3930-00-958-3683, Allis-Chalmers model FT20-24PS-127.

"January 1984."

Direct support and general support maintenance repair parts and special tools lists : truck, lift, fork, gasoline, solid rubber tired wheels, 2,000 lbs capacity, Army model MHE 192, NSN 3930-00-781-3857, Clark model C20B-1632032-100, NSN 3930-00-781-3858, Clark model C20B-1632033-127.

Includes index.

Direct support and general support maintenance repair parts and special tools lists : truck, fork lift, gasoline engine driven, solid rubber tires, 4,000 lb capacity Army model MHE 203, NSN 3930-01-935-7866 (100 in.), NSN 3930-00-935-7865 (180 in.), Hyster model S40CP.

Includes index.

Direct support and general support maintenance repair parts and special tools lists : truck, fork lift, electric, solid rubber tires, 2,000 lb. capacity, 144 in. lift Army model MHE 204, NSN 3930-00-935-7864, Baker model FTD-020-EE-SS.

Includes index.