logo

CuriousTab

CuriousTab

Discussion


Home Biochemical Engineering Fluid Flow Comments

  • Question
  • In animal cell bioreactor, bubble damage can be minimized by


  • Options
  • A. the addition of a shear protectorant
  • B. using a bubble free oxygen delivery system
  • C. headspace aeration
  • D. all of the above

  • Correct Answer
  • all of the above 


  • Fluid Flow problems


    Search Results


    • 1. A dilatant fluid is one in which the viscosity

    • Options
    • A. is constant regardless of the stirrer speed or mixing time
    • B. changes during mixing but returns to its original state after mixing
    • C. increases with increasing stirrer speed
    • D. decreases with increasing stirrer speed
    • Discuss
    • 2. A Newtonian fluid is one in which the viscosity

    • Options
    • A. is constant regardless of the stirrer speed or mixing time
    • B. changes during mixing but returns to its original state after mixing
    • C. increases with increasing stirrer speed
    • D. decreases with increasing stirrer speed
    • Discuss
    • 3. Water is a

    • Options
    • A. newtonian fluid
    • B. pseudoplastic
    • C. dilatant
    • D. rheopectic
    • Discuss
    • 4. Which of the following describes the detrimental effect of bubbles on animal cells?

    • Options
    • A. Cells trapped on the surface of bubbles can be damaged when the bubbles explode, releasing their pressure and surface energies
    • B. Cells trapped in the moving foam can be dragged apart by the bubbles
    • C. Both (a) and (b)
    • D. Bubbles can explode in the liquid medium causing the release of ultraviolet radiation
    • Discuss
    • 5. The Monod Model relates

    • Options
    • A. substrate utilized with the biomass consumption
    • B. specific growth rate to the substrate availability
    • C. yield with the biomass utilization
    • D. the biomass concentration with specific growth rate
    • Discuss
    • 6. Which of the following compound, if added to a solution will lead to the greatest increase in viscosity?

    • Options
    • A. A globular protein
    • B. Glucose
    • C. A long chain protein such as albumin
    • D. Water
    • Discuss
    • 7. A fluid in which the viscosity decreases with increasing stirrer speed and mixing time, can be represented as

    • Options
    • A. newtonian fluid
    • B. pseudoplastic, thixotropic fluid
    • C. dilatant, rheopectic fluid
    • D. dilatant, pseudoplastic fluid
    • Discuss
    • 8. A Brookfield viscometer measures viscosity by determining

    • Options
    • A. the shear stress
    • B. the shear rate
    • C. the shear stress and shear rate
    • D. the torque required to move an impeller at a set speed
    • Discuss
    • 9. In sparged mammalian cell bioreactors, the cell damage is caused because of

    • Options
    • A. shear stress arising during mixing of the cell culture fluid
    • B. shear stresses arising from the breakup of bubbles at the liquid surface
    • C. shear stresses between bubbles in foam at the liquid surface
    • D. all of the above
    • Discuss
    • 10. The SI unit for viscosity is

    • Options
    • A. kg.m-1.s-1
    • B. kg.m-2.s-2
    • C. kg.m-3.s-1
    • D. kg.m-1.s-2
    • Discuss


    Comments

    There are no comments.

Enter a new Comment