Initiation of flocculation ability of Saccharomyces cerevisiae MPY1 cells was observed at the moment the cells stop dividing because of nitrogen limitation. A shift in concentration of the limiting nutrient resulted in a corresponding shift in cell division and initiation of flocculence. Other limitations also led to initiation of flocculence, with magnesium limitation as the exception. Magnesi...

The aim of this study was to characterize landfill leachate of Çorlu that was heavily industrialized, and to examine the application of coagulation-flocculation and adsorption for the treatment of this leachate. This deposited area is non-regulated and municipal and industrial wastes are deposited uncontrollably. The experiments were conducted to investigate the combined process of coagulation-...

The tube flocculator is used to study how fluid shear levels affect the settling properties of a flocculated alum-kaolin suspension. FReTA is employed to quantitatively compare the effects of varying fluid shear and hydraulic residence time on the sedimentation velocity distributions and the post-sedimentation residual turbidities of flocculated suspensions formed in the tube flocculator. Resul...

Flocculation is a common and inexpensive method for harvesting algae from solution. After nitrogen starvation, it was shown that 83 + 3% of the wall-deficient cells of the cw 15 mutant of Chlamydomonas reinhardtii flocculated from 12 mL samples within 15 min after the addition of 15 mM calcium chloride at pH 8.4. Only 24 2% of the wildtype strain flocculated under these conditions, thus demonst...

Toxoplasmosis is a common disease among human and livestock with a worldwide distribution. This disease will be generated by a unicellular parasite called toxoplasmosis Gondii. The disease usually is diagnosed in laboratory through several methods such as; ELISA, Immunofluorescence and Chemo luminescence. The mentioned methods have sufficient sensitivity and trait, but since they are need to us...

At present, the regeneration agent with mineral oil as main component is widely used. However, its strong volatility, nonrenewability, and other shortcomings restrict development of technology. In this study, waste vegetable was used to prepare regenerated aging asphalt. The change in microstructure asphalt explored content time. results showed that addition could effectively supplement content...

In this work, the natural depletion process in sandstone and carbonate cores was modeled to investigate the asphaltene deposition mechanisms. A new permeability reduction correlation was proposed based on the Minssieux model that considers a combination of surface deposition, pore throat plugging, and filtration cake mechanisms. The results showed that the filtration cake is a dominant asphalte...

JANSEN, B. C., 1971. The quantitative determination of the toxic factors produced by Clostridium botulinum types C and D. Onderstepoort f. vet. Res., 38 (3), 177180 (1971). The Lf values of the C, C2 and D factors produced by Clostridium botulinum types C and D were compared with the results of in vivo quantitative tests. It was found that the flocculation test is a rel iable method of determin...

The effect of impeller type and shear rate on the evolution of floc size and structure during shear-induced flocculation of polystyrene particles with aluminum sulfate is investigated by image analysis. One radial flow (six-blade Rushton turbine) and two axial flow (three-blade fluid foil, four-blade 45° pitch) impeller configurations are examined. The steady state average floc size is show...