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What is the Difference between psychrophile and psychrotroph?
A psychrophile can survive in the range of 0 - 20 degrees Celsius but optimally at about 15 degrees Celsius or less. They are typically found in polar habitats.A psychrotroph can survive at a similar, but larger range than a psychrophile. It can survive from 0 - 35 degrees Celsius but optimally at 20 - 30 degrees Celsius These organisms can be found in refrigerated spoiled food.
What is a organism that grows slowly in the cold but has an optimum growth temperature of 32 degrees Celsius?
A psychrotroph is an organism that grows slowly in the cold but has an optimum growth temperature of around 32 degrees Celsius. Psychrotrophs can survive and even grow at refrigeration temperatures, making them a concern for food spoilage in cold storage environments.
What is a psychotroph?
psychrotroph A microorganism that can grow at low temperatures but grows optimally between 15 degrees and 20 degrees Celsius. Related cold, frost; freezing units of words: algid-; cheimo-, chimo-; crymo-, krymo-; cryo-, kryo-; frigo-; gel-; pago-; rhigo- hehehe...tama kea yhan.....ewan qu lhan...add nio nga pea accu xa f.b.. lil_fplaszxtickadah@yahoo.com...yhan nuah..!!^_^
Difference between psychrotroph mesophile thermophile thermoduric?
Psycothroph can grow at lower temperatures than mesophile Psycothroph minimum optimium maximum -5 to +5 ºC 25 to 30ºC 30 to 35ºC Mesophile minimum optimium maximum 5 to 15 ºC 30 to 40ºC 40 to 47ºC mesophile includes most of the Foodborne microorganisms in humans thermophile exist in geothermal environments, or under very hot temperatures under the ocean. requires a high temperature for optimum growth. minimum optimium maximum 40 to 14 ºC 55 to 75ºC 60 to 90ºC Thermoduric Are bacterias that survive the process of pasteurization, in form of spores.
Why do microorganisms grow more slowly as the temperature deviates from their optimum growth?
In supercooled solutions of H2O as low as -20 degrees, certain organisms can extract water for growth, and many forms of life flourish in the icy waters of the Antarctic, as well as household refrigerators, near 0 degrees. The cold-loving organisms are psychrophiles defined by their ability to grow at 0 degrees. A variant of a psychrophile (which usually has an optimum T of 10-15 degrees) is a psychrotroph, which grows at 0 degrees but displays an optimum T in the mesophile range, nearer room temperature. Psychrotrophs are the scourge of food storage in refrigerators since they are invariably brought in from their mesophilic habitats and continue to grow in the refrigerated environment where they spoil the food. Of course, they grow slower at 2 degrees than at 25 degrees. Think how fast milk spoils on the counter top versus in the refrigerator.Psychrophilic bacteria are adapted to their cool environment by having largely unsaturated fatty acids in their plasma membranes. Some psychrophiles, particularly those from the Antarctic have been found to contain polyunsaturated fatty acids, which generally do not occur in procaryotes. The degree of unsaturation of a fatty acid correlates with its solidification T or thermal transition stage (i.e., the temperature at which the lipid melts or solidifies); unsaturated fatty acids remain liquid at low T but are also denatured at moderate T; saturated fatty acids, as in the membranes of thermophilic bacteria, are stable at high temperatures, but they also solidify at relatively high T. Thus, saturated fatty acids (like butter) are solid at room temperature while unsaturated fatty acids (like safflower oil) remain liquid in the refrigerator. Whether fatty acids in a membrane are in a liquid or a solid phase affects the fluidity of the membrane, which directly affects its ability to function.
