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8 Cards in this Set
- Front
- Back
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Is botulism a greater danger in spoilage of canned goods under thermophilic or under mesophilic conditions?
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Thermophilic
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Canned foods are usually in metal cans. What sorts of containers are used for aseptically packaged foods?
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Some sort of material that cannot tolerate conventional heat treatment (laminated paper or plastic)
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Roquefort and blue cheeses are characterized by blue-green clumps. What are these?
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Penicillium molds
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Are bioreactors designed to operate aerobically or anaerobically?
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aerobic?
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Penicillin is produced in its greatest quantities during the trophophase of fermentation. Does that make it a primary or secondary metabolite?
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Secondary metabolite
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At one time, citric acid was extracted on an industrial scale from lemons and other citrus fruits. What organism is used to produce it today?
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The mold Aspergillus niger, using molasses as a substrate
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Landfills are the site of a major form of bioconversion—what is the product?
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Main product: Methane
Bioconversion: converting biomass into alternative energy sources. |
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How can microbes provide fuels for cars and electricity?
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Produce ethanol from cellulose;
Algal oil made into biodiesel fuel and possibly jet fuel; Hydrogen splitting to generate energy; potential for bacteria or algae to produce hydrogen from the fermentation of various waste products. |
