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reindeer moss
reindeer moss The common name for the lichen Cladonia rangiferina and similar species, which form extensively branched podetia up to about 8 cm tall; in C. rangiferina the apices of the branches are slender and curved, typically all in the same direction. These lichens are found, for example, on... Read more |
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recovery
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Lichen planus
Lichen Planus Definition Lichen planus is a skin condition of unknown origin that produces small, shiny, flat-topped, itchy pink or purple raised spots on the wrists, forearms or lower legs, especially in middle-aged patients. Description Lichen planus affects between 1-2% of the population,... Read more |
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National Recovery Administration
National Recovery Administration (NRA), in U.S. history, administrative bureau established under the National Industrial Recovery Act of 1933. In response to President Franklin Delano Roosevelt's congressional message of May 17, 1933, Congress passed the National Industrial Recovery Act, an... Read more |
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biotic potential
biotic potential (intrinsic rate of increase) Symbol r. The number of offspring of an individual organism that would survive to reproductive age under ideal conditons. It is a measure of an individual's reproductive potential, although this is seldom fully realized under natural conditons. Organisms... Read more |
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rate
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energy
energy in physics, the ability or capacity to do work or to produce change. Forms of energy include heat , light , sound , electricity , and chemical energy. Energy and work are measured in the same units—foot-pounds, joules, ergs, or some other, depending on the system of measurement... Read more |
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Saffir-Simpson scale
Saffir-Simpson scale , standard scale for rating the severity of hurricanes as a measure of the damage they cause; it is based on observations of numerous North Atlantic Basin hurricanes. First developed in the late 1960s by Herbert Saffir, a structural engineer, to quantity potential damage from... Read more |
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hemolysis
hemolysis , destruction of red blood cells in the bloodstream. Although new red blood cells, or erythrocytes, are continuously created and old ones destroyed, an excessive rate of destruction sometimes occurs. The dead cells, in sufficiently large numbers, overwhelm the organ that destroys them, the... Read more |
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Agricultural Economics
Agricultural Economy Sources Agriculture in an Industrial Economy.As the new industriai economy burgeoned, agricultural production also underwent profound changes. American farm output did not decline in the face of industriai growth; in fact, it grew at impressive... Read more |
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