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In his article, Miller discussed a coincidence between the limits of one-dimensional absolute judgment and the limits of short-term memory. In a one-dimensional absolute-judgment task, a person is presented with a number of stimuli that vary on one dimension (e.g., 10 different tones varying only in pitch) and responds to each stimulus with a corresponding response (learned before).
For example, Georg Joos reprised Miller's experiment using a very similar setup (the arms of his interferometer were 21 m vs. the 32 m in the Miller experiment) and obtained results that were 1/50 the magnitude of those from Miller's (see Michelson–Morley experiment#Subsequent experiments).
Below is a table of amino acids produced and identified in the "classic" 1952 experiment, as analyzed by Miller in 1952 [3] and more recently by Bada and collaborators with modern mass spectrometry, [7] the 2008 re-analysis of vials from the volcanic spark discharge experiment, [7] [55] and the 2010 re-analysis of vials from the H 2 S-rich ...
The labeled release (LR) experiment (PI: Gilbert Levin, Biospherics Inc.) gave the most promise for exobiologists. In the LR experiment, a sample of Martian soil was inoculated with a drop of very dilute aqueous nutrient solution. The nutrients (7 molecules that were Miller-Urey products) were tagged with radioactive 14 C.
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The Miller–Urey experiment used a highly reducing mixture of gases—methane, ammonia, and hydrogen, as well as water vapor—to form simple organic monomers such as amino acids. [37] The mixture of gases was cycled through an apparatus that delivered electrical sparks to the mixture.
The basis of this experiment was leveraged on Oparin's hypothesis, which assumed that some organic matter could be created from inorganic material given a reduction atmosphere. [1] Using a mixture of water, methane , ammonia , and hydrogen in glass tubes, Miller and Urey replicated the effects of lightning on the mixture using electrodes . [ 1 ]
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