20851. A mixed fermentation is one, which produces
20852. She is very beautiful, ...............
20853. The function of the DOS command and DIR/OD/S is :
20854. GUI stands for :
20855. One who can use both hands equally well
20856. If I..............more free time, I would learn Italian.
20857. Mixing in an anaerobic sludge blanket reactor is due to
20858. In batch culture, protogon is produced from peptone during the stationary phase with a yield of 0.4 protogon mg per g of peptone. If it is to be produced in a chemostat at a dilution rate of 0.5 h-1 from a medium containing 10 g.l-1 of peptone, then the rate of protogon synthesis would be
20859. Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because
20860. Which of the following would not be subjected to the "glucose effect"?
20861. Immobilized cell reactors for wastewater treatment have the advantage of having/being
20862. Which of the statement is true for continuous reactor at steady state?
20863. A continuous bioreactor in which only the flow rate is used to control the rate of cell or product productivity is called
20864. For organisms growing in a chemostat, the specific growth rate
20865. Saccharomyces cerevisiae is being grown in a chemostat converts glucose to biomass, ethanol, glycerol and carbon dioxide. At steady state, the concentration of glucose, biomass, ethanol and glycerol will
20866. In aerobic yeast fermentation for production of citric acid from alkanes using a fed-batch culture, why alkanes are slowly fed to the yeast?
20867. A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be
20868. Which of the following is used to calculate mass of substrate in the reactor?
20869. If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will
20870. Low dissolved oxygen concentrations leads to
20871. In a continuous reactor, the medium contains 40 g.l-1 of maltose and the medium flow rate is 10 litres per hour and the effluent contains 20 g.l-l of lactate. What is the productivity of lactate production from this reactor?
20872. A fed-batch reactor containing 1 g.l-1 of substrate in 2 litre of medium. It is fed with 1 g.l-l of substrate at the rate of 1 litre per hour. After 10 hours, the concentration of substrate in the reactor was 0.5 g.l-1 . The mass of substrate that was used by the culture in the reactor was
20873. Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following?
20874. The cellular productivity in a continuous stirred tank fermenter (CSTF) increases with an increase in the dilution rate and reaches a maximum value. If the dilution rate is increased beyond the maximum point, the productivity will
20875. Fluidized bed bioreactors provide higher mass transfer rates than packed bed bioreactors because
20876. In fed-batch fermentation, mass of substrate utilized is calculated using the relationship
20877. A chemostat has a liquid volume of 2 litres and is being fed at a rate of 4 litres per hour. Dilution rate for this reactor will be
20878. Mixing per unit volume is observed to be poorest in
20879. The growth of an organism on glucose is described by the following Monod model parameters: μm = 0.5 h-1 and Ks =0.1 g.l-1, if the concentration of glucose in the feed is 10 g.l-1 and the dilution rate is set to 0.4 h-1, then the steady state concentration of glucose in the effluent will be
20880. A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be
20881. A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.
20882. The main reason for production of antibiotics in fed batch reactors is
20883. Fed batch reactors is used to produce vinegar because
20884. When a culture of fermenting yeast becomes metabolically uncoupled, ethanol
20885. Mixing profiles closest to plug flow are observed in
20886. On a glucose medium, the growth of an organism is characterized by the following Monod model and stoichiometric parameters μm = 0.3 h-1, Ks =0.05 g.l-1 and Yxs = 0.3 g.g-1 When this organism is grown in a 2 litre continuous on a medium containing 10 g.l-1 of glucose added at 1 l.h-1, the steady state concentration of biomass in the reactor will be
20887. Unsteady state mass balance for dynamic model of continuous stirred tank reactor (CSTR) is
20888. A fed-batch reactor initially contains 2 litre of medium. If it was fed at 1 litre per hour, then after 10 hours, the volume of the reactor will be
20889. A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic
20890. In a fluidized bed reactor, the function of the disengagement zone is to
20891. Saccharomyces cerevisiae produces high biomass yields at low glucose concentrations and high dissolved oxygen concentrations. Which of the following should be followed for maximizing its biomass productivity?
20892. In a glucose-yeast extract medium, Lactococcus lactis has a maximum specific growth rate (um) of 1.23 h-1. What would be the specific growth rate of this organism at steady state in a 4 litre reactor being fed at 2 litres per hour?
20893. Which of the following is not correct with regards to continuous cultures?
20894. In a plug flow reactor, the highest concentration of substrates is exposed to the cells that
20895. In an activated sludge process, the biomass is recycled to
20896. A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will
20897. A fed-batch reactor containing 2 litre of medium and 0.1 g.l-l of biomass is fed with a medium containing 1 g.l-1 of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l-1, then the biomass produced during the 10 hour period is
20898. Which of the following organisms will continue their metabolism at high substrate concentrations?
20899. Yeast is typically produced in fed batch reactors because
20900. Two continuous bioreactors containing the same organisms, fed with the same feed at the same dilution rate were compared. Reactor 1 started with an initial concentration of glucose of 10 g.l-1, while reactor 2 contained 0.1 g.l-1 of glucose at the start of the process then at steady state
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
Powered By:Omega Web Solutions