A train 100 m long is running at the speed of 30 km/hr. Find the time taken by it to pass a man standing near the railway line.

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#Question id: 14216

#Part-B Specialized Branches in Biotechnology

The viscosity of fluid decreases with increasing stirrer speed, the fluid would be 

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#Question id: 14217

#Part-B Specialized Branches in Biotechnology

In a microbial system how true yields are related to apparent growth yield? 

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#Question id: 14218

#Part-B Specialized Branches in Biotechnology

In CSTR system at steady rate  

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#Question id: 14218

#Part-A Aptitude & General Biotechnology

In CSTR system at steady rate  

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#Question id: 14221

#Part-B Specialized Branches in Biotechnology

E. coli have a maximum respiration rate, qO2max, of about 240-mg O2/g-dry wt-h. It is desired to achieve a cell mass of 20 g dry wt/l. The kLa is 120 h-1 in a 1000-l reactor (800 l working volume). A gas stream enriched in oxygen is used (i.e., 80% O2) which gives a value of C* = 28 mg/L. If oxygen becomes limiting, growth and respiration slow; for example,

                                     

   where CL is the dissolved oxygen concentration in the fermenter. What is CL when the cell mass is  at 20 g/l?

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#Question id: 14237

#Part-B Specialized Branches in Biotechnology

A genetically-engineered strain of yeast is cultured in a bioreactor at 30⁰C for production of heterologous protein. The oxygen requirement is 80 mmol 1-1 h-I; the critical oxygen concentration is 0.004 mM. The solubility of oxygen in the fermentation broth is estimated to be 10% lower than in water due to solute effects. What is the minimum mass-transfer coefficient necessary to sustain this culture if the reactor is sparged with air at approximately 1 atm pressure ?