3,845 research outputs found
A RIGID PLASTIC FINITE-ELEMENT FORMULATION CONSIDERING THE EFFECT OF GEOMETRIC CHANGE AND ITS APPLICATION TO HYDROSTATIC BULGING
No full textA RIGID PLASTIC FINITE-ELEMENT FORMULATION FOR THE ANALYSIS OF GENERAL DEFORMATION OF PLANAR ANISOTROPIC SHEET METALS AND ITS APPLICATIONS
No full textBIODEGRADATION OF CYANIDE COMPOUNDS BY PSEUDOMONAS-FLUORESCENS IMMOBILIZED ON ZEOLITE
No full textA cyanide-degrading bacteria, Pseudomonas fluorescens NCIB 11764, was used for the treatment of wastewater containing cyanide. After successive subculture for 2 months in cyanide-containing medium, cultures were fully adapted to cyanide and able to grow in a medium containing up to 260 mg l(-1) of cyanide. By fed-batch culture supplying only cyanide, it was confirmed that cyanide was the limiting nutrient as a nitrogen source. Ammonia was found to inhibit cyanide degradation, and the rate of degradation was halved when the ammonia concentration was higher than 1 mM. In a 15-l jar fermenter, 26 mg l(-1) of cyanide was consumed almost completely within 48 h and the final yield of growth on cyanide was calculated as 4.21 mg dry cell wt mg(-1) CN. Cells of P. fluorescens were immobilized on zeolite and applied to a modified activated sludge-type reactor to mimic the actual activated sludge system of a coke-plant wastewater treatment system. In this immobilized system operated batchwise, 26 mg l(-1) of cyanide was degraded completely by 8 g l(-1) of immobilized particles within 10 h. The same reactor system was operated in a continuous mode, and the cyanide concentration of the outlet reached the stationary-state level of less than 0.1 mg l(-1) within 2 days at 0.041 h(-1) of dilution rate and within 3 days at 0.082 h(-1) of dilution rate, respectively
OPTIMIZATION OF 2-STAGE CONTINUOUS-CULTURE SYSTEM FOR PRODUCTION OF POLY-BETA-HYDROXYBUTYRATE
No full textThe optimization of poly-beta-hydroxybutyrate (PHB) fermentation process is essential to obtain a high PHB productivity. An optimization of two-stage continuous culture system by complex method for PHB production is presented. PHB production rate of the system obtained in the present study was chosen as the objective function. The PHB production rate of the system was higher than that of the phasewise optimization method which maximizes the growth rate of residual biomass in the first stage and the PHB production rate in the second stage. When the inlet glucose concentration in the first stage increased, PHB content and yield also increased. When the fermenter volume ratio (V-2/V-1) was 0.5, maximum PHB productivity in the second stage was 2.86 g/L . h, which is highest compared with the reported value on PHB
RIGID PLASTIC FINITE-ELEMENT ANALYSIS OF HYDROSTATIC BULGING OF ELLIPTIC DIAPHRAGMS USING HILL NEW YIELD CRITERION
No full textPrevalence and rapid identification of clarithromycin-resistant Helicobacter pylori isolates in children.
No full text
The synergistic experimental design of the YJ.
No full text<p>The synergistic experimental design of the YJ.</p
- …
