Effect of the method of agitation on the accumulation of protective antigen in cultures of Bacillus anthracis.
Accumulation of protective antigen was essentially independent of culture volume, provided the organisms were kept in suspension by stirring. Agitation by orbited shaking was unsatisfactory.
Design of Coupled Slider Crank Mechanism for Orbiting Motion
The paper describes development of a novel orbiting mechanism. Target design is a shaking mechanism with a planar figure eight closed loop. Shaking dynamics depends on a cycling frequency as well on a reciprocating displacement. These two parameters are in the focus of preliminary design and analysis. Computational optimization and path definition were interrelated to core engineering work. Crucial novelty is an orbital motion created by a coupled slider crank mechanism. An academic package of the Solid Works Motion 2010 was employed for parts and assembly design, as well as for the subsequent mechanism analysis. The outcome design proved itself in operation with a smooth shaking motion over a closed loop and even more the uniformly distributed acceleration peaks within each cycle. (Received in January 2014, accepted in January 2015. This paper was with the authors 5 months for 3 revisions.)
Thermodynamics on the Carbochlorination of Titanium-bearing Ores
The equilibrium compositions of the multi-component, multi-phase and multi-reaction system of carbochlorination of titanium-bearing ores are calculated with HSC, a computational chemistry software. The thermodynamic equilibrium calculation of the reaction system shows that a complete conversion of titanium-bearing ores is feasible at a temperature near 200oC. At temperatures ranging from 800 to 1600oC, the products of the reaction system are all in gaseous phase. Thermodynamic analysis accords with the industrial practice. The simulated results provide reasonable scientific basis for improving suitable technological conditions of the carbochlorination reduction.