Nutrient medium is to be heated from 10⁰C to 28⁰C is a single-pass countercurrent shell-and-tube heat exchanger before being pumped into a fed-batch fermenter. Medium passes through the tubes of the exchanger; the shell-side fluid is water which enters with flow rate 3 x 10^4 kg h^- 1 and temperature 60⁰C pre-heated medium is required at a rate of 50 m^3 h^-1. The density, viscosity and heat capacity of the medium are the same as water; the thermal conductivity of the medium is 0.54 Wm^- 1 ⁰C ^- 1. It is proposed to use 30 steel tubes with inner diameter 5 cm; the tubes will be arranged in line. The pipe wall is 5-mm thick; the thermal conductivity of the metal is 50 Wm^- 1 ⁰C ^- 1. The maximum linear shell-side fluid velocity is estimated as 0.15 m s^-1. Calculate the log-mean temperature difference _________

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#Question id: 15635

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Emotif uses which databases for alignment of sequences?

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#Question id: 15636

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

While analysing motif sequences, what is the major disadvantageous feature of PROSITE?

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#Question id: 15639

#Section 1: Engineering Mathematics

If A is Hermitian matrix, then IA is

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#Question id: 15640

#Section 1: Engineering Mathematics

The value of the determinant  

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#Question id: 15641

#Section 1: Engineering Mathematics

 If then . . 

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#Question id: 15642

#Section 4: Fundamentals of Biological Engineering

The viscosity of a fluid decreases with increasing stirrer speed. This fluid would be best described as being: