A 65-year-old man with emphysema due to 34 years of cigarette smoking is admitted to hospital due to dyspnea. With further tests the mean pulmonary arterial pressure is determined to be 45 mm Hg at rest. He is hypoxic (PO2 = 49 mm Hg), hypercapnic (85 mm Hg), and slightly acidotic. The cardiovascular and oxygen changes are due to which of the following?

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#Question id: 14741

#SCPH05 I Biotechnology

Microbial cell recovery is carried out in a continuous disc-stack centrifuge. The centrifuge is operated at 5000 rpm for separation of baker's yeast. At a feed rate of 60 1/min, 50% of the cells are recovered. At constant speed, solid recovery is inversely proportional to flow rate. What operating speed is required to recover 90% of cells if the flow rate in the centrifuge is maintained at 601/min? 

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#Question id: 14742

#SCPH05 I Biotechnology

Gel chromatography is used for hormone separation. A pilot-plant scale gel chromatography column packed with sephacryl resin is used to separate two hormones, A and B. The column is 5 cm in diameter and 30 cm in height: V, = 1.9x 10-⁴m³, Wr = 3x10^-3m³ /kg dry sephacryl, ps =1.25 x 10³ kg/m³ . The partition coefficients are k_pA =0.38 and k_pB= 0.15. If the eluting flow rate is 0.7 I/h, what is the retention time for each hormone? 

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#Question id: 14743

#SCPH05 I Biotechnology

for the fermenter with the given data. 

Air is sparged with 0.4 vvm, it is equipped with two sets of impellers and a flat-blade turbine with four baffles. calculate power, P 

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#Question id: 14744

#SCPH05 I Biotechnology

For production of an enzyme used for synthesis of a sun protection lotion, the required kinetic data and constants are: 

vmax = 2.3 mmol.m^-3 s^-1 Km = 8.9 mmol.^-1 So = 12 mmol1- 

Find the reaction time for 95% conversion of raw material 

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#Question id: 14745

#SCPH05 I Biotechnology

heat exchanger, one transfer unit means 

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#Question id: 14746

#SCPH05 I Biotechnology

During cultivation of microorganism in a fermenter, various parameters are controlled by appropriate mechanism, match the following