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Recent questions tagged bioprocess

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1
At the end of a batch culture. glucose solution is added at a flow rate of 200 nil-"h. If theculture volume after 2 h of glucose addition is 1000 ml. the initial culture volume (in 1111)is
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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2
Moist heat sterilization of spores at 121 C follows rst order kinetics as per the expression:where. N is the number of viable spores. I is the time. kd is the rate constant and(IN . . - . is the rate 01 change of viable spores.(itIf kd value is 1.0 minl. ... in minutes.) required to reduce the number of viable sporesfrom an initial value of 1010 to a nal value of 1 is (up to two decimal places)
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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3
An aqueous solution containing 6.8 mg I. of an antibiotic is extracted with ainyl acetate. Ifthe partition coefcient of the antibiotic is 170 and the ratio of water to solvent is 85. thenthe extraction factor is
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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4
A microbial strain is cultured in a 100 I. stirred fermenter for secondary metaboliteproduction. If the specic rate of oxygen uptake is 0.4 h'1 and the oxygen solubility in thebroth is 8 mg L. then the volumetric mass transfer coefficient (Km) (in sl) of oxygenrequired to achieve a maximum cell concentration of 12 gL is (up to two decimalplaces)
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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5
Shear stress versus shear rate behavior of four different types of uids (I. II. III and IV) areshown in the gure below.Shear stress (N.m2) Shear rate (s'l)Which one of the following options is correct? I-Newtonian. II-Bingham plastic. III- ... . IV-Binghanl plastic I-Newtonian. II-Pseudoplastic. III-Binghani plastic. IV-Dilatant I-Newtonian. II-Binghani plastic. III-Pseudoplastic. IV-Dilatant
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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6
Which one of the following bioreactor congurations is the basis for a trickling biologicallter?(A) Stirred tank (B) Packed bed(C ) Air lift (D) Fluidized bed
asked Feb 20, 2018 in Bioprocess Engineering and Process Biotechnology gatecse 1.4k points
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