Nicotiana tabacum cells are cultured to high density for production of polysaccharide gum. The reactor used is a stirred tank, containing initially 100 litres medium. The maximum specific growth rate of the culture is 0.18 d^-1 and the yield of biomass from substrate is 0.5 g g^-l. The concentration of growth-limiting substrate in the medium is 3% (w/v). The reactor is inoculated with 1.5 g l^{- 1} cells and operated in batch until the substrate is virtually exhausted; medium flow is then started at a rate of 4 l d^-1. Fed-batch operation occurs under quasi-steady-state conditions. Estimate final biomass concentration?

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TLS Online TPP Program

#Question id: 15510

#Section 5: Bioprocess Engineering and Process Biotechnology

A zero order reaction in A has a rate constant of 0.003 molL^-1sec^-1. How long will it take for A’s initial concentration to fall from 0.10 M to 0.075 M?

TLS Online TPP Program

#Question id: 15938

#Section 1: Engineering Mathematics

The value of the determinant

 

TLS Online TPP Program

#Question id: 21733

#Section 5: Bioprocess Engineering and Process Biotechnology

A rate law __________.

TLS Online TPP Program

#Question id: 1706

#Section 2: General Biology

Which of the following statements is the best example of a primary lymphoid organ?

TLS Online TPP Program

#Question id: 1978

#Section 2: General Biology

In which of the following situations will helper T cells be activated?