In a batch sterilization process if  overall,  heating &  cooling are 32.2, 9.8 & 10.1 respectively, THEN the holding time at 121^^o-C of the process is (given that the specific death rate (k) of microorganisms at 121^^o-C is 2.54 min-1 ):

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#Question id: 14252

#Section 5: Bioprocess Engineering and Process Biotechnology

Yeast cells are recovered from a fermentation broth by using a tubular centrifuge. Sixty percent (60%) of the cells are recovered at a flow rate of 12 l/min with a rotational speed of 4000 rpm. Recovery is inversely proportional to flow rate. At a constant rpm of 4000 rpm, what should be the flow rate to result in 95% cell recovery?

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#Question id: 2415

#Section 3: Genetics, Cellular and Molecular Biology

Within an actin filament, each actin subunit is surrounded by how many neighboring actin subunits?

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#Question id: 15493

#Section 4: Fundamentals of Biological Engineering

Assume that experimental measurements for a certain organism have shown that cells can convert two-thirds (wt/wt) of the substrate carbon to biomass carbon. Calculate the stoichiometric coefficients for the following biological reactions:

Glucose: C₆H₁₂O₆ + aO₂ + bNH₃ c(C_4.4H_7.3N_0.86O_1.2) + dH₂O + eCO₂

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#Question id: 12942

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

Name a single - stranded uracil containing vector which is grown in a selectable host deficit of the enzymes.

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#Question id: 1607

#Section 2: General Biology

Which of the following does NOT protect body surfaces?